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  Subjects -> ENGINEERING (Total: 2269 journals)
    - CHEMICAL ENGINEERING (190 journals)
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    - ELECTRICAL ENGINEERING (100 journals)
    - ENGINEERING (1201 journals)
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ENGINEERING (1201 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Full-text available via subscription   (Followers: 5)
AASRI Procedia     Open Access   (Followers: 14)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 207)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 1)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 10)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 4)
Advanced Science     Open Access   (Followers: 4)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 4)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 6)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 18)
Advances in Artificial Neural Systems     Open Access   (Followers: 3)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 25)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 9)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 18)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 7)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 40)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 34)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 1)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 4)
AIChE Journal     Hybrid Journal   (Followers: 28)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access  
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 5)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 6)
Applied Clay Science     Hybrid Journal   (Followers: 4)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 4)
Applied Sciences     Open Access   (Followers: 3)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 8)
Arkiv för Matematik     Hybrid Journal  
ASEE Prism     Full-text available via subscription   (Followers: 2)
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 7)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 9)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 3)
Batteries     Open Access   (Followers: 3)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 24)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 8)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 1)
Biotechnology Progress     Hybrid Journal   (Followers: 40)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 3)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Full-text available via subscription   (Followers: 14)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 40)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 7)
Case Studies in Thermal Engineering     Open Access   (Followers: 4)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 5)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 4)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 10)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 20)
Clay Minerals     Full-text available via subscription   (Followers: 8)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 4)
Coastal Engineering     Hybrid Journal   (Followers: 10)
Coastal Engineering Journal     Hybrid Journal   (Followers: 3)
Coatings     Open Access   (Followers: 2)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 23)
Composite Interfaces     Hybrid Journal   (Followers: 5)
Composite Structures     Hybrid Journal   (Followers: 242)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 175)
Composites Part B : Engineering     Hybrid Journal   (Followers: 215)
Composites Science and Technology     Hybrid Journal   (Followers: 159)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 12)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 25)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Computers and Geotechnics     Hybrid Journal   (Followers: 8)
Computing and Visualization in Science     Hybrid Journal   (Followers: 6)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 25)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 7)
Control Engineering Practice     Hybrid Journal   (Followers: 40)
Control Theory and Informatics     Open Access   (Followers: 7)
Corrosion Science     Hybrid Journal   (Followers: 24)
CT&F Ciencia, Tecnologia y Futuro     Open Access  
CTheory     Open Access  
Current Applied Physics     Full-text available via subscription   (Followers: 4)

        1 2 3 4 5 6 7 | Last

Journal Cover Canadian Geotechnical Journal
  [SJR: 2.093]   [H-I: 75]   [14 followers]  Follow
    
   Full-text available via subscription Subscription journal  (Not entitled to full-text)
   ISSN (Print) 0008-3674 - ISSN (Online) 1208-6010
   Published by NRC Research Press Homepage  [19 journals]
  • Corrigendum: Field study of residual forces developed in pre-stressed
           high-strength concrete (PHC) pipe piles
    • Pages: 1 - 1
      Abstract: Canadian Geotechnical Journal, e-First Articles.

      Citation: Canadian Geotechnical Journal
      PubDate: 2017-03-09T06:47:09Z
      DOI: 10.1139/cgj-2017-0120
       
  • Reply to the discussion by Zhang et al. on “Field study of residual
           forces developed in pre-stressed high-strength concrete (PHC) pipe
           piles”
    • Pages: 1 - 2
      Abstract: Canadian Geotechnical Journal, e-First Articles.

      Citation: Canadian Geotechnical Journal
      PubDate: 2017-03-08T08:38:42Z
      DOI: 10.1139/cgj-2016-0669
       
  • Discussion of “Field study of residual forces developed in pre-stressed
           high-strength concrete (PHC) pipe piles”
    • Pages: 1 - 2
      Abstract: Canadian Geotechnical Journal, e-First Articles.

      Citation: Canadian Geotechnical Journal
      PubDate: 2017-03-08T08:37:43Z
      DOI: 10.1139/cgj-2016-0588
       
  • Undrained stability of rectangular tunnels where shear strength increases
           linearly with depth
    • Authors: Daniel W. Wilson, Andrew J. Abbo, Scott W. Sloan, Kentaro Yamamoto
      Pages: 1 - 12
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      This paper investigates the stability of a plane strain rectangular tunnel under undrained conditions, where the shear strength profile increases linearly with depth. The undrained stability of tunnels for a range of geometries and soil conditions is found using rigid-block upper bound methods as well as finite element limit analysis (FELA). The latter procedures employ a discrete form of the bound theorems of classical plasticity to formulate an optimization problem that is solved using a bespoke conic programming scheme. Rigorous solutions, obtained using adaptive re-meshing of the finite element mesh, generally bracket the true collapse load with upper and lower bound solutions to within 2%. Results from the parametric study are summarized in the form of stability charts.
      Citation: Canadian Geotechnical Journal
      PubDate: 2017-02-22T08:41:36Z
      DOI: 10.1139/cgj-2016-0072
       
  • Reply to the discussion by Liu et al. on “New transient method for
           determining soil hydraulic conductivity function”
    • Authors: A.K. Leung, J.L. Coo, C.W.W. Ng, R. Chen
      Pages: 1 - 2
      Abstract: Canadian Geotechnical Journal, e-First Articles.

      Citation: Canadian Geotechnical Journal
      PubDate: 2017-02-16T05:59:14Z
      DOI: 10.1139/cgj-2016-0589
       
  • Discussion of “New transient method for determining soil hydraulic
           conductivity function”
    • Authors: Jian Liu, Gang Deng, Jia Xu
      Pages: 1 - 2
      Abstract: Canadian Geotechnical Journal, e-First Articles.

      Citation: Canadian Geotechnical Journal
      PubDate: 2017-02-16T05:57:14Z
      DOI: 10.1139/cgj-2016-0560
       
  • Accuracy of determining pre-consolidation pressure from laboratory tests
    • Authors: Muhammad Umar, Abouzar Sadrekarimi
      Pages: 441 - 450
      Abstract: Canadian Geotechnical Journal, Volume 54, Issue 3, Page 441-450, March 2017.
      Shear strength and compressibility of fine-grained soils is strongly influenced by their stress history and the maximum (pre-consolidation) pressure ([math]). Accurate determination of [math] is thus critical for settlement and stability analysis involving fine-grained soils. Many graphical techniques are available for estimating [math] from the interpretation of soil compression in laboratory consolidation (oedometer) tests. However, the accuracy of these methods has not been extensively proven or compared with each other. A series of 30 laboratory oedometer tests is carried out in this study based on controlled rate of strain and incrementally loaded testing techniques. Several Canadian clay specimens are subject to cycles of one-dimensional compression loading and unloading to produce a known stress history and [math]. The imposed [math] values are compared with the predictions of 11 methods for determining [math]. The accuracies of these methods are subsequently evaluated by comparing their predictions with [math] imposed during the consolidation experiments. While these methods mostly overestimate [math], it is determined that a bilogarithmic graphical approach based on the slopes of the virgin compression and recompression segments of a soil compression curve provides the most accurate predictions of [math]. The potential ranges of errors associated with the application of each method are also presented.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-02T07:00:00Z
      DOI: 10.1139/cgj-2016-0203
       
  • 2013 Colloquium of the Canadian Geotechnical Society: Geotechnical and
           geoenvironmental behaviour of high-density tailings
    • Pages: 1 - 14
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      The breaching of containment of conventionally deposited mine tailings impoundments, and the consequent release of tailings flows with long run-outs, unfortunately remains not uncommon and often has devastating ecological and economic consequences, occasionally including the loss of human life. Rather than the breaching of containment itself, which can result from a number of causes (poor control of the phreatic surface, unrecognized dam foundation issues), the contributing factor to the severe consequences of dam breach is the low density and strength and (or) susceptibility of the tailings to liquefy or soften under loading, combined with the driving weight of the ponded water, which allows for significant run-outs (in some cases tens of kilometres) to occur. Hence the motivation for developing alternative technologies that dewater tailings before deposition to the point where reliance on containment is minimized or eliminated. In this paper, these technologies are referred to as “high-density” tailings, which includes any technology that at least produces nonsegregating tailings that will form a sloped stack when deposited, including thickened, paste, and filtered tailings. The paper explores a number of issues related to high-density tailings, including shear behaviour, dewatering behaviour, acid generation, and surface deposition rheology. The paper concludes with some discussion on what the limitations are on this technology that are holding back its wider adoption, and how these limitations might be overcome.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-28T08:00:00Z
      DOI: 10.1139/cgj-2015-0533
       
  • Performance of polymer-enhanced bentonite–sand mixture for covering
           arsenic-rich gold mine tailings for up to 4 years
    • Pages: 1 - 12
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Experiments conducted over a 4 year period, on a polymer-enhanced bentonite–sand mixture (PEBSM) used as cover for gold mine tailings are reported. The effect on PEBSM hydraulic conductivity (k) of subgrade porewater chemistry, subgrade water content, and confining stress are investigated. Results show that the reduction in the mole fraction of bound Na+ (ESP) and corresponding increase in k of PEBSM with time was highly dependent on the ionic strength of the subgrade porewater. When the PEBSM was in direct contact with gold mine tailings with porewater having an ionic strength of 145 mmol/L, ESP decreased from 59% to 2% and k increased from 4 × 10−11 to 6.9 × 10−9 m/s. The ESP and k values of PEBSM over tailings with 11 mmol/L porewater were 21% and 6.9 × 10−11 m/s, respectively. A 0.15 m thick foundation layer between tailings and PEBSM layer significantly lowered the reduction in ESP and increase in k with time as did a reduction in the subgrade water content. There was no effect of changing confining stress from 15 to 7.5 kPa on k values of PEBSM. The PEBSM layer acted as a good barrier to the migration of arsenic from tailings upward towards cover soil above the PEBSM layer.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-23T08:00:00Z
      DOI: 10.1139/cgj-2016-0375
       
  • Investigation of plant growth and transpiration-induced matric suction
           under mixed grass–tree conditions
    • Pages: 1 - 13
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Although evapotranspiration-induced matric suction for single species has been widely studied, little is known about how mixed-species planting would affect plant growth and induced matric suction. This study aims to explore the effects of grass–tree interaction on their growth and induced matric suction during evapotranspiration (ET) and rainfalls. Field monitoring was carried out to measure matric suction responses in compacted soil that was vegetated with (i) single tree species, Schefflera heptaphylla, and (ii) mixed species of the trees and a grass species, Cynodon dactylon. In each condition, three tree spacings (120, 180, and 240 mm) were planted. When tree spacing increased from 120 to 240 mm, the peak tree root area index (RAI, for fine roots with diameter
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-23T08:00:00Z
      DOI: 10.1139/cgj-2016-0226
       
  • Experimental study of the progressive collapse mechanism of excavations
           retained by cantilever piles
    • Pages: 1 - 14
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      An increasing number of catastrophic progressive collapses of deep excavations have occurred throughout the world. However, the research on progressive collapse mechanisms is limited. In this paper, two categories of model tests were conducted to investigate the mechanism of partial collapse (sudden failures of certain retaining piles) and progressive collapse. The model test results show that partial collapse can cause a sudden increase in the bending moments of adjacent piles via an arching effect. The load-transfer coefficients are defined to be equal to the peak increase ratios of the maximum bending moments in adjacent piles (peak moments caused by collapse over the values before the collapse). When the maximum load-transfer coefficient is larger than the bearing capacity safety factor of the piles, the partial failure will lead to progressive collapse. The influential factors of the progressive collapse mechanism, such as the partial collapse extent, excavation depth, and capping beam, were also investigated. During progressive collapse, the previous failed pile could cause new stress arching; simultaneously, the soil behind certain nearest intact piles could become loosened and destroy the arch springing of the stress arching, causing the progressive collapse to cease gradually.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-23T08:00:00Z
      DOI: 10.1139/cgj-2016-0284
       
  • Study on the efficiency of destress blasting in deep mine drift
           development
    • Pages: 1 - 11
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Canadian hard rock mines continue to reach deeper deposits, which poses greater challenges to mine safety including rock burst control. Destress blasting techniques have been successfully employed in such underground mines with the aim of preconditioning highly stressed rock mass to mitigate the risk for rock burst occurrence in deep mines. In the present study, the efficiency of destress blasting is examined through a comparison between traditional and alternative numerical modelling approaches. The traditional modelling approach assumes a uniformly distributed blast-induced damage zone extending over the entire drift face, whilst the alternative modelling approach, presented herein, simulates the damage zone for each individual blast hole. In the first part of this paper, a three-dimensional numerical model of a single blast hole is constructed, whereby the extent of blast-induced damage zone is delineated. The latter part of this paper uses the single-hole model results to examine the efficiency of destress blasting as practiced in drift development in deep mines. It is demonstrated through comparison of FLAC3D numerical simulation results that the traditional modelling approach may lead to an overly optimistic indication of destress blasting efficiency when compared with the alternative modelling approach, in which a more precise simulation of the damage zones is applied.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-15T08:00:00Z
      DOI: 10.1139/cgj-2016-0260
       
  • Analytical model for vacuum consolidation incorporating soil disturbance
           caused by mandrel-driven drains
    • Pages: 1 - 14
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      When vacuum preloading is applied with vertical drains, the rate of consolidation can be increased, and the stability of an embankment is enhanced due to the inward lateral movement. The aim of this study is to develop an analytical solution for vacuum preloading that accurately captures the more realistic variations in compressibility and permeability in actual ground conditions as a result of drain installation. The soil samples were obtained from various locations after drain installation to determine the characteristics of soil surrounding the vertical drain in terms of compressibility and permeability. The main differences between the proposed and conventional models are described by considering the stress history and preloading pressure. The effect of pre-consolidation pressure and the magnitude of applied preloading are examined through the dissipation of average excess pore pressure and associated settlement. The analysis of a selected case history employing the writers’ solution indicates improved accuracy of the predictions in comparison to the field measurements.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-14T08:00:00Z
      DOI: 10.1139/cgj-2016-0232
       
  • Prediction and analysis of surface settlement due to shield tunneling for
           Xi’an Metro
    • Pages: 1 - 18
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      This study describes a new modified prediction method of surface settlement (SS) for Xi’an Metro. The estimation method of SS and its characteristic parameters, volume loss (VL), maximal SS, and settlement trough width (STW) are reviewed and discussed in this paper. The gap parameter (GP) is applied to estimate VL; however, the calculation method of GP and its influence factors have not been clarified entirely. In this study, six influence factors are introduced into the new GP model, and the detailed solutions are presented. This estimation method is able to take into account the support pressure of the shield head at the tunnel face, the lining support pressure around the tunnel opening, the filling effect of tail grouting, yawing, and pitching of the shielding machine, and the long-term deformation of the remoulded surrounding soil. Based on Xi’an Metro line 2, the soil behaviors and measured SS characteristics are deeply investigated. The upper and lower bounds of the total GP of the 15 cases are predicted. Comparison of the predicted SS troughs with field observations can show reasonable agreement. It is suggested that the new estimation method can be used effectively in estimating the SS induced by the shield tunneling method.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-14T08:00:00Z
      DOI: 10.1139/cgj-2016-0166
       
  • DInSAR data assimilation for settlement prediction: case study of a
           railway embankment in the Netherlands
    • Pages: 1 - 16
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Secondary settlements in soft soils represent a significant fraction of the total settlement induced by external loads. Consequently, these settlements can play a key role in performance, serviceability, and safety of engineering works such as buildings, roads, embankments, and pipelines. This paper addresses the development of a predictive settlement model for a railway embankment built on soft clayey–peaty soils by following an original procedure consisting of three cascading steps: (i) preliminary detection of the most settlement-affected portions of the infrastructure; (ii) development of an equivalent subsoil model to study secondary settlements; (iii) back-calculation of the parameters of a predictive settlement model (design subsoil model) via a variational data assimilation scheme that exploits ground displacement measurements derived from differential interferometric synthetic aperture radar (DInSAR) data. The main achievement relies on the retrieval of a stochastic prediction of secondary settlements that can contribute to rationalize both conventional monitoring campaigns and management of key infrastructure.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-11-10T08:00:00Z
      DOI: 10.1139/cgj-2016-0425
       
  • Thermal properties of oil sands fluid fine tailings: laboratory and in
           situ testing methods
    • Authors: Kathryn A. Dompierre, S. Lee Barbour
      Pages: 1 - 13
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Fluid fine tailings (FFT) are soft tailings produced by the bitumen extraction process associated with open-pit oil sands mining. Oil sands mine operators have proposed the use of end pit lakes (EPLs) to contain soft tailings and Syncrude Canada Ltd. has developed the first EPL in the industry. This EPL, referred to as Base Mine Lake, contains FFT transferred from an above-ground tailings facility in a mined-out pit. The FFT was placed at elevated temperatures relative to natural groundwater temperatures in the region, so the FFT will act as a long-term source of heat. Evaluation of the thermal regime within the EPL requires the characterization of the thermal properties of FFT. Laboratory testing was undertaken to measure the thermal properties (thermal conductivity and volumetric heat capacity) of the FFT over a range of water contents and to evaluate the effect of bitumen content on the thermal properties. Field testing was also undertaken to verify that these properties were similar in the undisturbed FFT, measured at a larger scale.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-24T07:00:00Z
      DOI: 10.1139/cgj-2016-0235
       
  • Transformation models for effective friction angle and relative density
           calibrated based on generic database of coarse-grained soils
    • Pages: 1 - 21
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      This study compiles a generic database of seven parameters, including relative density and friction angle, for coarse-grained soils from 176 studies, covering a wide range of reconstituted and in situ coarse-grained soils. This database, labeled as “SAND/7/2794”, is dominated by data from laboratory reconstituted soils such as Erksak, Hokksund, Monterey, Ottawa, Sacramento River, Ticino, and Tonegawa sands. About 15% of the data points in the database are in situ samples obtained from tube sampling, block sampling, or ground freezing techniques. The correlation behavior among some parameters in the database is consistent with existing transformation models in the literature. Mine tailings, volcanic soils, railroad ballast, gravelly soils with significant cobble or boulder content, and soils with high fines contents are removed from the database because they exhibit inconsistent behavior. Soils subjected to very high effective stresses are also removed from the database. The generic database is adopted to calibrate the bias and variability of existing transformation models. Transformation uncertainties are characterized based on their bias, variability, and the range of applicability.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-19T07:00:00Z
      DOI: 10.1139/cgj-2016-0318
       
  • Framework to assess Newmark-type simplified methods for evaluation of
           earthquake-induced deformation of embankments
    • Authors: Mojtaba E. Kan, Hossein A. Taiebat, Mahdi Taiebat
      Pages: 1 - 13
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      The simplified procedures for evaluation of the earthquake-induced displacement in earth and rockfill dams are widely used in practice. These methods are simple, inexpensive, and substantially less time consuming as compared to the complicated stress–deformation approaches. They are especially recommended to be used as a screening tool, to identify embankments with marginal factor of safety, assuming that these methods always give conservative estimates of settlements. However, recent studies show that application of these methods may not be conservative in some cases, especially when the tuning ratio of a dam is within a certain range. In this paper, the fundamental theory behind the simplified methods is critically reviewed. A case in which the results of the simplified methods are reportedly nonconservative is investigated in detail and possible reasons are discussed. The reliability of the simplified methods is examined here based on the existing thresholds proposed in the literature and accounting for the embankment geometry and type, and for the seismic activity characterization, and a practical framework is proposed accordingly. The effectiveness of this framework is evaluated in the study of seismic behaviour of a rockfill dam where all simplified procedures failed to predict the order of deformation experienced by the dam under a recent earthquake event.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-18T07:00:00Z
      DOI: 10.1139/cgj-2016-0069
       
  • Numerical study of the effect of soil–atmosphere interaction on the
           stability and serviceability of cut slopes in London clay
    • Authors: A. Tsiampousi, L. Zdravkovic, D.M. Potts
      Pages: 1 - 14
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      The stability of cut slopes is greatly influenced by seasonal pore-water pressure variations under the combined effect of rainfall and vegetation. However, predicting soil–atmosphere interaction is not straightforward, due to the complexity of both the boundary conditions involved and the hydromechanical behaviour of soils, which is coupled and highly nonlinear, rendering the use of numerical tools, such as finite element analysis, necessary. This paper discusses the numerical modelling of soil–atmosphere interaction and presents the analysis of a slope cut in London clay in a highly vegetated area. The whole life cycle of the slope is considered with phases of low and high water demand vegetation and vegetation clearance. The analysis results indicate that dense vegetation is associated with high factors of safety, but may induce large differential displacements, which are likely to affect the serviceability of the slope. Vegetation clearance, however, may initiate instability, highlighting the need for effective vegetation management to achieve a balance between serviceability and ultimate limit states. Although the case considered is representative of southeast England, it introduces the necessary tools for realistic numerical analysis of soil–atmosphere interaction.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-18T07:00:00Z
      DOI: 10.1139/cgj-2016-0319
       
  • Development of a viscoelastoplastic model for a bedded argillaceous rock
           from laboratory triaxial tests
    • Authors: Zhenze Li, Thanh Son Nguyen, Grant Su, Denis Labrie, Jean Dominique Barnichon
      Pages: 1 - 14
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Argillaceous rocks are candidate host and (or) cap formations for the geological disposal of nuclear wastes in many countries, including Canada, France, and Switzerland. The understanding of the long-term mechanical behaviour of such rocks is an essential requirement for the assessment of their performance as a barrier against radionuclide migration. The French Institute for Radiological Protection and Nuclear Safety (IRSN) operates an Underground Research Laboratory (URL) in Tournemire, France, in a rock formation known as the Tournemire shale. Many types of experiments are conducted at the Tournemire URL to better understand the physical and chemical behaviour of this shale and its interaction with seal materials intended to be used in the geological disposal of radioactive wastes. The Canadian Nuclear Safety Commission (CNSC) collaborates with the IRSN and CanmetMINING laboratories to perform experimental and theoretical research on the mechanical behaviour of the Tournemire shale. Using data from creep tests, and monotonic and cyclic triaxial tests performed at CanmetMINING Laboratories, we developed constitutive relationships for the mechanical behaviour of the Tournemire shale. The model is based on the theory of plasticity, and takes into consideration the inherent anisotropy due to the existence of bedding planes, hardening behaviour before the peak strength, and viscosity.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-18T07:00:00Z
      DOI: 10.1139/cgj-2016-0100
       
  • An analytical approach to assess quality control sample sizes of
           cement-based “solidification/stabilization”
    • Authors: Rukhsana Liza, Gordon A. Fenton, Craig B. Lake, D.V. Griffiths
      Pages: 1 - 9
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      This paper presents an analytical approach to selecting the sample size required to achieve acceptable quality control in a cement-based “solidification/stabilization” construction cell program intended for the treatment–containment of contaminated soils. The proposed approach is based on the hypothesis test that the cell does not have an acceptably low hydraulic conductivity (the null hypothesis) versus the alternative hypothesis that it does. Analytical solutions are developed to compute the probabilities of both type I (mistakenly rejecting the null hypothesis) and type II (mistakenly failing to reject the null hypothesis) errors as functions of the number of samples and the statistics of the hydraulic conductivity field. The analytical results are validated by Monte Carlo simulations and are then used to develop rational sampling requirements. An example is presented to illustrate how the proposed approach can be used in practice to assess the required sample size for the quality control program of cement-based S/S construction cells.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-18T07:00:00Z
      DOI: 10.1139/cgj-2016-0218
       
  • Runout analysis and mobility observations for large open pit slope
           failures
    • Authors: John Whittall, Erik Eberhardt, Scott McDougall
      Pages: 1 - 19
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Objectively forecasting the runout of a potential open pit slope failure, in addition to identifying the failure itself, is a critical component of a mine’s risk management plan. Recent losses arising from large open pit slope failures demonstrate shortcomings in current practice. A dataset of 105 pit slope failures was compiled to compare open pit runout trends against established empirical runout relationships for natural landslides. Fahrböschung angle versus volume and Fahrböschung angle versus slope angle relationships provide reasonable runout estimates. Open pit slopes have the advantage of removing the influence of morphological features, vegetation, and liquefiable substrates while controlling the travel path angle and roughness. In such a controlled environment, landslide mobility has a strong sensitivity to slope angle, material properties, and fall height, and is only modestly sensitive to volume. A grouping of highly mobile open pit slope cases involving weathered, saturated, collapsible rock mass materials exceed expected runout distances when compared with established runout trends. This suggests mobility for these weaker rock masses is controlled by pore pressures mediating basal friction. The result is that two different runout exceedance trends are observed based on whether the unstable rock mass involves fresh, strong rocks or weathered weak rocks.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-14T07:00:00Z
      DOI: 10.1139/cgj-2016-0255
       
  • Influences of root-induced soil suction and root geometry on slope
           stability: a centrifuge study
    • Authors: A.K. Leung, V. Kamchoom, C.W.W. Ng
      Pages: 1 - 13
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Soil bioengineering using vegetation has been recognised as an environmentally friendly solution for shallow slope stabilization. Plant transpiration induces suction in the soil, but its effects on slope stability are often ignored. This study investigates the influences of transpiration-induced suction and mechanical reinforcement of different root geometries (i.e., tap- and heart-shaped) to the slope stability subjected to an intense rainfall with an intensity of 70 mm/h (prototype scale; corresponding to a return period of 1000 years), via centrifuge modelling. New model roots that have scaled mechanical properties close to real roots were used to simulate transpiration-induced suction in the centrifuge. Transient seepage analyses were performed using SEEP/W to back-analyse the suction responses due to transpiration and rainfall. Subsequently, the back-analysed suction was used to assess the factor of safety of the slopes using SLOPE/W. It is revealed that heart-shaped roots provided greater stabilization effects to a 60° clayey sand slope than tap-shaped roots. The heart-shaped roots induced higher suction, leading to 14% reduction of rainfall infiltration and 6% increase in shear strength. Although transpiration-induced suction in a 45° slope was reduced to zero after the rainfall, mechanical root reinforcement was found to be sufficient to maintain slope stability.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-13T07:00:00Z
      DOI: 10.1139/cgj-2015-0263
       
  • Undrained stiffness anisotropy from hollow cylinder experiments on four
           Eocene-to-Jurassic UK stiff clays
    • Authors: A. Brosse, R.J. Jardine, S. Nishimura
      Pages: 1 - 20
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      The paper describes the anisotropic undrained stiffness behaviour of four medium-plasticity heavily overconsolidated UK stiff marine clays as revealed through hollow cylinder testing. The experiments contributed to two broader studies on stiff-to-hard London, Gault, Kimmeridge, and Oxford clay strata. They involved static and dynamic testing of multiple high-quality natural specimens sampled at similar depths from inland sites. This paper explores the directional dependency of the clays’ highly nonlinear undrained stiffness characteristics. New data-analysis approaches are outlined that allow the stiffnesses associated with one-dimensional vertical, horizontal, or pure horizontal shear modes to be isolated in complex undrained stress paths. In the presented experiments, loading progressed from in situ stresses to reach ultimate failure at a range of final major principal stress orientation angles α (defined in the vertical plane) while keeping fixed values of the intermediate principal stress ratio, b. The tests reveal strong undrained stiffness anisotropy that can impact significantly on the prediction and understanding of ground deformation patterns in numerous geotechnical engineering applications.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-13T07:00:00Z
      DOI: 10.1139/cgj-2015-0320
       
  • Subgrade resilient modulus prediction using light-weight deflectometer
           data
    • Authors: S. Hamed Mousavi, Mohammed A. Gabr, Roy H. Borden
      Pages: 1 - 9
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      Resilient modulus has been used for decades as an important parameter in pavement structure design. Resilient modulus, like other elasticity moduli, increases with increasing confining stress and decreases with increasing deviatoric stress. Several constitutive models have been proposed in the literature to calculate resilient modulus as a function of stress state. The most recent model, recommended by the Mechanistic–empirical pavement design guide (MEPDG) and used in this paper, calculates resilient modulus as a function of bulk stress, octahedral shear stress, and three fitting coefficients: k1, k2, and k3. Work in this paper presents a novel approach for predicting resilient modulus of subgrade soils at various stress levels based on light-weight deflectometer (LWD) data. The proposed model predicts the MEPDG resilient modulus model coefficients (k1, k2, and k3) directly from the ratio of applied stress to surface deflection measured during LWD testing. The proposed model eliminates uncertainties associated with needed input parameters for surface modulus (ELWD) calculation, such as the selection of an appropriate value of Poisson’s ratio for the soil layer and shape factor. The proposed model was validated with independent data from other studies reported in the literature.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-13T07:00:00Z
      DOI: 10.1139/cgj-2016-0062
       
  • Hydromechanical behavior of an embankment during inundation
    • Authors: G.M. Rotisciani, F. Casini, A. Desideri, G. Sciarra
      Pages: 1 - 11
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      The paper presents a comprehensive analysis of the hydromechanical response of an embankment subject to inundation. The modified Cam clay model extended to unsaturated conditions and formulated in terms of Bishop’s effective stress is used to predict the mechanical behavior of the sand–clay mixture. The model’s ability to accurately reproduce the embankment response is evaluated by comparing the numerical predictions with the results of the physical model. Time evolution and spatial distribution of the wetting-induced displacements are analyzed together with the stress paths resulting from the imbibition process. The influence of after-compaction conditions on the embankment performance is examined focusing on the occurrence of the volumetric collapse.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-10-13T07:00:00Z
      DOI: 10.1139/cgj-2016-0174
       
  • A new simplified method and its verification for calculation of
           consolidation settlement of a clayey soil with creep
    • Authors: Jian-Hua Yin, Wei-Qiang Feng
      Pages: 1 - 15
      Abstract: Canadian Geotechnical Journal, e-First Articles.
      The calculation of the consolidation settlement of clayey soils with creep behaviour has been a challenging issue with a long history. After a brief review the assumptions made in the two methods based on Hypothesis A and Hypothesis B, the authors present a new simplified hypothesis B method for calculation of consolidation settlement of a clayey soil with creep. Equations of this method are derived based on the “equivalent time” concept for different stress–strain states. This simplified Hypothesis B method is then used to calculate the consolidation settlement of a number of typical consolidation problems. The approximation and verification of this simplified method are examined by comparing the calculated settlements with settlements computed using two fully coupled finite element (FE) consolidation analysis programs using elastic viscoplastic (EVP) constitutive models (Hypothesis B) and the Hypothesis A method. It is found that the curves calculated using the new Hypothesis B simplified method with a factor α = 0.8 are close to curves from two FE model simulations with relative errors in the range 0.37%∼8.42% only for three layers of Hong Kong marine clay (HKMC). In overall, the settlements calculated using Hypothesis A method are smaller than those from the two FE simulations with relative error in the range 6.52%∼46.17% for the three layers of HKMC. In addition, this new simplified Hypothesis B method is used to calculate the average strain of consolidation tests done by Berre and Iversen in 1972. The calculated results are compared with the test data, and values from a fully coupled finite difference (FD) consolidation analysis using Yin and Graham’s EVP constitutive model (Hypothesis B), and Hypothesis A method. It is found that, again, the results from the new simplified Hypothesis B method are very close to the measured data. In conclusion, the new simplified Hypothesis B method is a suitable simple method, by spread-sheet calculation of the consolidation settlement of a single layer of a clayey soil with creep.
      Citation: Canadian Geotechnical Journal
      PubDate: 2016-09-15T07:00:00Z
      DOI: 10.1139/cgj-2015-0290
       
 
 
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