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ENGINEERING (1199 journals)                  1 2 3 4 5 6 | 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: 15)
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: 215)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
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: 5)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
Advances in Artificial Neural Systems     Open Access   (Followers: 4)
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: 19)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 23)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
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: 12)
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: 35)
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   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 27)
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: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 8)
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: 7)
Applied Network Science     Open Access  
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
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: 7)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
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: 8)
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: 23)
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: 9)
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: 3)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 1)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
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: 13)
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: 3)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
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: 3)
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: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 21)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 4)
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: 6)
Composite Structures     Hybrid Journal   (Followers: 252)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 176)
Composites Part B : Engineering     Hybrid Journal   (Followers: 223)
Composites Science and Technology     Hybrid Journal   (Followers: 165)
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: 8)
Control Engineering Practice     Hybrid Journal   (Followers: 41)
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  

        1 2 3 4 5 6 | Last

Journal Cover Bulletin of Engineering Geology and the Environment
  [SJR: 0.525]   [H-I: 35]   [3 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1435-9537 - ISSN (Online) 1435-9529
   Published by Springer-Verlag Homepage  [2329 journals]
  • Introduction to a thematic set of papers on methods to assess the
           reliability of landslide hazard mapping
    • Authors: G. Vessia; L. Coco; M. Rossi
      Pages: 393 - 395
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-017-1026-3
      Issue No: Vol. 76, No. 2 (2017)
  • Study of ornamental granitoid slabs for structural properties of
           ventilated façades and raised access flooring systems
    • Authors: Sérgio Trajano Franco Moreiras; Antenor Braga Paraguassú; Rogério Pinto Ribeiro
      Pages: 497 - 505
      Abstract: One of the most efficient uses of stone plates, which requires greater sizing accuracy, is the non-adherent system (without mortar), such as ventilated façades and pedestrian paving systems. The advantages of using a non-adherent system are the ease of assemblage and high productivity. Bending tensile stress is commonly used in non-adherent covering system design with natural stone. Other properties that are important to evaluate the structural behavior of the granitoids, which are not evaluated in usual projects, are the stress versus strain behavior diagram, the Young’s modulus, and Poisson’s ratio. Therefore, this paper determined these parameters for three Brazilian granitoids. For the Sao Gabriel Black and Desireé White, the results indicate a strong correlation between the five Young’s modules determined. The safety factor ‘three’ used ensures, in every situation, that plates of 30 mm in thickness work within the elastic regime.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-016-0927-x
      Issue No: Vol. 76, No. 2 (2017)
  • Hydraulic conductivity of a glacial clay till liner
    • Authors: Ramy Saadeldin; Gene Froc
      Pages: 553 - 560
      Abstract: The study of water flow through soils is an important aspect of soil mechanics. Past experience with glacial clay till deposits investigated in central and southern Saskatchewan has demonstrated that in situ saturated hydraulic conductivities vary from about 10−6 to 10−9 cm/s. In some applications and regulatory references, an accepted practice in the past is to assume that the field hydraulic conductivity value for a soil liner will be one order of magnitude (i.e. ten times) greater than the confirmed laboratory hydraulic conductivity value for a remoulded sample composed of the same soil. In fact, experience has shown that measured as-built field hydraulic conductivity values for a soil liner can be several orders of magnitude greater than the laboratory value if the liners are poorly constructed and, therefore, would not be compliant with regulatory criteria. The reliability of artificially applying any correction factor to a laboratory value to obtain an assumed field value is, therefore, questionable. This paper describes field and laboratory investigations that were conducted to characterize the general properties and the hydraulic conductivity of a glacial clay till soil liner. For this example case study, laboratory measurements of the hydraulic conductivity for remoulded soil samples were undertaken using a flexible wall permeameter (FWP). Air-entry permeameter (AEP) tests were performed on a soil test pad prior to construction and then on the completed soil liner immediately after construction to measure the as-built hydraulic conductivity. Both the FWP and AEP tests resulted in comparable hydraulic conductivity values that were in the order of 10−8–10−9 cm/s. A preceding and preliminary empirical approach was also found to be reasonable for purposes of determining soil suitability and estimating the “achievable” hydraulic conductivity value. The preliminary estimate was determined to be conservatively greater than the values determined by both the FWP and AEP test methods.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-016-0977-0
      Issue No: Vol. 76, No. 2 (2017)
  • Study of physico-mechanical properties of Emeishan basalt saprolites in
           Yunnan, China
    • Authors: Zhe Ren; Luyue Zhang; Zemin Xu; Jiaming Zhang; Jipu Chen
      Pages: 617 - 628
      Abstract: Saprolites are the weathered products that differ greatly from their parent rock in terms of the physico-mechanical properties because their chemical components are leached, yet differ from a typical soil because they still maintain their inherited structure. Here, typical Emeishan basalt saprolites that are widely distributed in the Guizhou and Yunnan Provinces were examined in terms of their basic physical indexes, compression properties, shear properties and microstructure to identify the differences between the parent rock and weathered product. The Emeishan basalt saprolites are characterized by a low density, high void ratio and medium–low compressibility. Also, these saprolites exhibit inelastic nonlinear response and relatively high cohesion during pressure tests. There is a brittle failure in low confining stresses and plastic deformation in high values, indicating the preservation of structural and textural characteristics from the parent rock; however, with highly developed secondary porosity, its strength is much lower than the parent rock. All the results indicate that Emeishan basalt saprolites are a kind of unique geological material, requiring consideration during construction and engineering within the region.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-016-0959-2
      Issue No: Vol. 76, No. 2 (2017)
  • The ultrasonic P-wave velocity-stress relationship of rocks and its
    • Authors: Xiang Chen; Zhaoyi Xu
      Pages: 661 - 669
      Abstract: When a rock sample is extracted from an underground rock mass, it is subject to unloading, which will cause changes in the physical and mechanical properties. This article describes a laboratory experiment to determine the change of P-wave velocity of rock samples during a uniaxial compression test. It was found that the P-wave velocity vs. stress curves (V-S curves) of the rock samples could reflect three stages of bulk volume deformation commonly observed in a uniaxial compression test of rocks. When the applied stress was less than σ c (about 0.25–0.33 of the uniaxial compressive strength), the P-wave velocities increased rapidly with the increase of stress; this part of the V-S curves could be fitted with a power function. When the stress was greater than σ c, the P-wave velocities of rock samples increased more slowly and gradually approached the peak before decreasing dramatically near failure; the V-S curves above σ c could be fitted with a polynomial function of the second degree. During the V-S experiment, it could be also observed that the increasing rate of P-wave velocity decreased dramatically when the applied stress reached the overburden stress. An unloading index was defined as the ratio of the P-wave velocity under in situ overburden stress to the P-wave velocity at free stress and could be calculated from the measured V-S curves. Based on the calculated unloading index, the calculation of the intactness index of rock mass could be modified, and then an improvement of the basic quality (BQ) classification method of rock masses, which is used widely in China, was made.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-016-0866-6
      Issue No: Vol. 76, No. 2 (2017)
  • Seismic performance of loess-mudstone slope by centrifuge tests
    • Authors: Zelin Zhang; Tao Wang; Shuren Wu; Huiming Tang; Changyu Liang
      Pages: 671 - 679
      Abstract: In this paper, we study the effect of the amplitude of input shaking on the dynamic response of a loess-mudstone slope through a series of staged centrifuge tests, including different amplitude earthquake excitations, in which the seismic performance of the slope models was analyzed and investigated. The derived outputs were processed to study the earthquake acceleration amplification effect and to assess the induced deformation mechanism in terms of the resulting displacements and deformation mode. The test results indicated that the amplification factors of peak ground acceleration (PGA) increased with increasing slope height, reaching maximum values at the crest. The amplification effect was also demonstrated on the slope surface. In addition, the predominant amplitude of the input seismic excitation was critical to the response of the slope. The results proved that the displacements in the loess layer were much larger than those in the weathered mudstone. Tensile cracks were formed mainly on the crest and the upper part of the slope, and failure modes were dominant at the slope surface. The location of the slide plane in the model was consistent with the location of maximum acceleration. A continuous shallow slide plane was formed in the loess layer. The analysis provides good information for identifying both surface movement and mass movement.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-015-0846-2
      Issue No: Vol. 76, No. 2 (2017)
  • A discrepancy between observed and predicted NATM tunnel behaviors and
           updating: a case study of the Sabzkuh tunnel
    • Authors: Majid Taromi; Abbas Eftekhari; Jafar Khademi Hamidi; Ali Aalianvari
      Pages: 713 - 729
      Abstract: The 11 km long Sabzkuh water conveyance tunnel is under construction using conventional and tunnel boring machine tunneling techniques in the Zagros Mountains of south west Iran. During excavation of the conventional section (i.e., 350 m), three daylighting collapses occurred in the tunnel, and large sinkholes developed at the ground surface, due to both poor ground conditions and inappropriate selection of excavation and support class (ESC). In this study, the influence of ESC on tunnel response and stability was investigated through three dimensional (3D) finite difference and finite element methods. The analysis results of numerical modeling indicated that the tunnel face would be stable if a single stage (full face) excavation and an advance step of 1.5 m (defined as ESC#1) were applied. However, the reality was different, and the tunnel collapsed soon after the face was only 35 m away from the portal. Having changed the ESC by taking into account new geological and geotechnical data obtained from face mapping, a field survey of surface cavity, and a trench study, the tunneling advance rate was satisfactory (1.5 m/day) despite the many challenges encountered. This paper presents a brief review of some of the key geological challenges faced in the tunnel design, including characterization of the ground conditions, selection of appropriate design parameters, and evaluation of the excavation and support installation sequence based on monitoring and analyzing ground behavior during construction. The discrepancy between the predicted and observed behavior of the tunnel, and some practical considerations, are also discussed.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-016-0862-x
      Issue No: Vol. 76, No. 2 (2017)
  • Assessment of rock slope stability at Cham-Shir Dam Power Plant pit using
           the limit equilibrium method and numerical modeling
    • Authors: L. Faramarzi; M. Zare; A. Azhari; M. Tabaei
      Pages: 783 - 794
      Abstract: There is global concern about the stability of rock slopes in open pit mines while the limit equilibrium technique used for modeling complex geometries and forces fails to provide a complete understanding of the behavior of rock slopes due to its inherent shortcomings. However, numerical approaches to modeling complex rock structures have improved the general understanding of these slope structures. In this study, geological and geotechnical data were obtained from both exploration drill holes and laboratory tests using face mapping and scanline surveys to reveal three major joint sets related to the regional tectonic history at the Cham-Shir dam power plant pit in Iran. The joints play an important role in the slope stability of the open pit, notably in terms of planar and wedge failures. Moreover, both the limit equilibrium technique and the discrete element method were employed to analyze the stability of the Cham-Shir dam power plant pit in an attempt to evaluate its behavior under both supported and unsupported conditions in the three modes of continuous rock mass, rock mass with two joint sets, and rock mass with three joint sets. Results show that the rock mass is stable in the continuous mode. The possible failure must, therefore, be due to the structure type and the joint sets at the site. To address the requirements and to resolve the problem, a simulation study was conducted. Based on the findings, stage by stage excavations are recommended for the study site.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-016-0870-x
      Issue No: Vol. 76, No. 2 (2017)
  • Combined effects of blasting and geological structure on rock mass
           stability—a case study from the Marrakech–Agadir highway, Morocco
    • Authors: Taoufik Benchelha; Toufik Remmal; Rachid El Hamdouni; Hussein Ejjaouani; Hammou Mansouri; Fouad El Kamel; Kawtar Lakroud
      Pages: 815 - 828
      Abstract: The Marrakech–Agadir highway crosses mountainous areas of the Western High Atlas of Morocco with a high risk of slope instability. The use of explosives as an excavation method, especially at kilometric point 33 on the Imintanout–Argana section, has triggered major ruptures. The regional geological setting, together with the lithological and structural characteristics of the rock mass, represent the major factors influencing this operation where the degree of disturbance is estimated as 0.82. The studied slope is located along the trajectory of a submeridian fault corridor remobilised because of blasting during excavation works. This slope reveals instabilities associated with tectonic planes (F1 and F2) and/or bedding (S0) and the presence of argillites and siltstones that coincide with bedding. These unconsolidated layers, inclined in the direction of excavation, act as slide planes. Structurally, the Pk33 slope can be subdivided into three zones depending on the displacement type being recorded and may be a fortiori related to the geomechanical properties of the substrate. The rheological characteristics of zones B and C, highly fractured and with low competence, respectively, explain their relatively different displacement patterns from that of zone A. The maximum instantaneous explosive load used for offloading the upper part of the sliding mass has been estimated in order to increase the safety factor for the instable slope.
      PubDate: 2017-05-01
      DOI: 10.1007/s10064-016-0867-5
      Issue No: Vol. 76, No. 2 (2017)
  • Seismic site effects in the central zone of Monterrey Metropolitan Area
           (northeast Mexico) from a geotechnical multidisciplinary assessment
    • Authors: Jorge A. Salinas-Jasso; Juan C. Montalvo-Arrieta; Efraín Alva-Niño; Ignacio Navarro de León; Juan M. Gómez-González
      Abstract: Prediction of the ground shaking response requires data expressed in terms of soil dynamic properties. Based on the analysis of surficial geology, geotechnical borehole data, seismic refraction (VS) and microtremors (H/V) surveys, we have developed a qualitative evaluation of local ground response to earthquakes in the Monterrey Metropolitan Area (MMA), the main urban and economic hub in northern Mexico. The results provide a detailed geotechnical model for the central zone of the MMA. Although such information is not yet complete for the MMA region, an initial approach has been developed in order to estimate the distribution of damage associated with expected moderate earthquakes. An empirical correlation is introduced to obtain VS as a function of standard penetration test blow counts (SPTN). According to the results, the central-southern part of the study area might experience higher amplifications of ground shaking produced by moderate seismicity because the larger thicknesses of alluvial sediments are deposited there. The 2D geotechnical model proposed would be very useful in making decisions regarding planning or land use, deployment of protocols of rapid response and for producing detailed microzonation maps for those zones with similar geological features as the MMA in northeast Mexico.
      PubDate: 2017-05-20
      DOI: 10.1007/s10064-017-1065-9
  • Stability analysis of rock slopes against sliding or flexural-toppling
    • Authors: Yun Zheng; Congxin Chen; Tingting Liu; Kaizong Xia; Xiumin Liu
      Abstract: Toppling is a mode of failure that may occur in a wide range of layered rock strata in rock slopes. According to the results of physical model tests and field investigations of anti-inclined rock slopes, most real instabilities are of the sliding or flexural-toppling type. Failure often initiates at the slope toe, and the failure surface is usually multi-planar rather than planar. These properties should determined by searching rather than based on assumption. Taking these problems into account, in this paper we propose a theoretical model for rock slopes with a potential for sliding or flexural-toppling failure on the basis of two physical model tests. An innovative approach for the stability analysis of such slopes based on the limit equilibrium theory is then proposed. Subsequently, a comparative analysis is carried out using the discrete element method and the Aydan et al. method with the aim to verify the validity and accuracy of the proposed approach. Finally, the possible difference between angles of the basal calculation plane and the failure surface of the sliding zone and superimposed toppling zone with respect to the plane normal to the discontinuities is presented.
      PubDate: 2017-05-18
      DOI: 10.1007/s10064-017-1062-z
  • A study on landslides and subsurface piping, facilitated by dykes, using
           vertical electrical sounding and δO 18 and δH 2 stable isotopes
    • Authors: K. S. Sajinkumar; C. Unnikrishnan Warrier; C. Muraleedharan; A. Shahul Hameed; V. R. Rani; A. P. Pradeepkumar; P. Sundarajan
      Abstract: A combination of vertical electrical sounding (VES) and δO18 and δH2 stable isotope geochemistry is used in this study to trace out the extension of a dyke and for deciphering the subsurface piping phenomena in a landslide-affected hamlet, Pasukadavu, in the Western Ghats of Kerala, India. VES was successful in extracting three to four different subsurface layers characterized by differing resistivity. Two VES sections were prepared from 24 different VES locations, each one for understanding the dyke extension and for delineating subsurface conduits. The dyke was characterized by high resistivity of 800–5000 Ω.m and shows varying thickness. In the second profile, the void zone, which is characteristic of piping, is delineated through a low resistivity zone (75 to 350 Ω.m). δO18 and δH2 stable isotopes collected along the second VES profile show the same chemistry, indicating that it is the same water which flows all along the VES profile 2. A four-stage conceptual model was developed to illustrate and narrate the sequence of development of the piping phenomena and landslide activity.
      PubDate: 2017-05-16
      DOI: 10.1007/s10064-017-1056-x
  • An ensemble landslide hazard model incorporating rainfall threshold for
           Mt. Umyeon, South Korea
    • Authors: Ananta Man Singh Pradhan; Hyo-Sub Kang; Ji-Sung Lee; Yun-Tae Kim
      Abstract: In this study, a new ensemble method was developed to assess landslide hazard models in Mt. Umyeon, South Korea, using the results of a physically based model as a conditioning factor (CF). Hydrological conditions were obtained from the national-scale rainfall threshold. To incorporate rainfall threshold in landslide initiation, national landslide inventory data were used to prepare I-D and C-D thresholds. A series of factor of safety (FS) distribution maps were prepared using a physically based model with a 12-h cumulative rainfall threshold. We created an ensemble model to overcome limitations in the physically based model, which could not incorporate important environmental variables such as hydrology, forest, soil, and geology. To determine the effect of CFs on landslide distribution, spatial data layers of elevation, drainage proximity, soil drainage characters, stream power index, sediment transport index, topographic wetness index, forest type, forest density, tree diameter, soil type geology, and the FS distribution map were analyzed in a maximum entropy-based machine learning algorithm. Validation was performed with a receiver operating characteristic curve (ROC). The ROC showed 65.9% accuracy in the physically based model, whereas the ensemble model had higher accuracy (79.6%) and a prediction rate of 89.7%. The ensemble landslide hazard model is a new approach, incorporating the FS distribution map into the available independent environmental variables.
      PubDate: 2017-05-16
      DOI: 10.1007/s10064-017-1055-y
  • Instabilités gravitaires dans la région de Béjaïa (Algérie):
           Inventaire et appréciation de l’importance relative des différents
           paramètres conduisant au déclenchement, au maintien ou à l’activation
           des instabilités
    • Authors: Hallal Nassim; Dubois Laurent; Bougdal Rachid; Djouder Fahem
      Abstract: This article contributes to the analysis of the various factors that interact in triggering and reactivating of landslides in Béjaïa city and its eastern coastal region. These factors are associated with lithologic nature of the various geological formations outcropping, morphology and its evolution during the Quaternary period, rainfall patterns and seismic context; however, other causes exist in this case, anthropogenic factors. The multiplicity of typologies identified types of movement grounds (landslides, mudflows, rock falls, falling, etc.) that reflect the diversity of mechanical behavior of materials encountered, but also the permanent unfavorable conditions and triggering of varying intensity over time encountered at each site.
      PubDate: 2017-05-12
      DOI: 10.1007/s10064-017-1050-3
  • The effect of microstructure on m i strength parameter variation of common
           rock types
    • Authors: N. Sabatakakis; G. Tsiambaos; S. Ktena; S. Bouboukas
      Abstract: A series of laboratory tests was conducted on selected intact sedimentary (sandstones and limestones) and igneous (granites and andesites-dacites) rocks obtained from several sites of Greece. Physical and mechanical properties were determined, while the investigation was focused on strength parameters determination and especially on Hoek-Brown strength parameter mi through the triaxial compression. Mineral composition of grains, as well as microstructure (grain size, shape and interlocking) was estimated through microscopic examination using some well known petrographic indices. The alteration and weathering state for the studied igneous rocks were also microscopically quantified. Regression analysis of laboratory data have clearly shown a direct strong intrinsic influence of microstructure as quantitatively described by the petrographic indices and by textural interlocking of the grains, as well as of grain deterioration on measured mi value. The mi value generally increases with the increasing grain size of studied clastic and igneous rocks, but it decreases to a power expression with sparitic material of limestones. The increase of weathering and alteration state also decreases the mi parameter of tested igneous rocks.
      PubDate: 2017-05-11
      DOI: 10.1007/s10064-017-1059-7
  • A stability analysis of landslides based on random fields, part II: base
           circle slope
    • Authors: X. P. Zhou; B. Z. Zhu; Louis N. Y. Wong
      Abstract: In this paper, the stability of base circle slopes is analyzed based on the theory of random fields. The closed-form solution of the safety factor and the failure probability of base circle slopes are obtained using the integration method. The effects of the spatial variation of the mechanical parameters of soils on the stability of base circle slopes are investigated. The mean values of the safety factor and the failure probability of base circle slopes are determined. The effects of spatial correlation length on the failure probability of base circle slopes are studied. The results show that for homogeneous slopes, the accuracy of the vertical integration model is greater than that of the horizontal integration model. For layered slopes, the effectiveness of the horizontal integration method is validated by a Monte Carlo simulation. Therefore, the horizontal integration model is more suitable for the layered slopes than the vertical integration model.
      PubDate: 2017-05-08
      DOI: 10.1007/s10064-017-1051-2
  • A stability analysis of landslides based on random fields - Part I: Toe
           circle slope
    • Authors: X. P. Zhou; B. Z. Zhu; Louis N. Y. Wong
      Abstract: The stability analysis of toe circle slopes is studied using random field theory from the perspective of probability, and the relationship between the failure probability of toe circle slopes and the correlation length is analyzed. The closed-form solutions of the safety factor and the failure probability of toe circle slopes are derived using the integration method. The accuracy of the safety factor of toe circle slopes is improved when the slice method is replaced by the integration method. The effects of spatial correlation length on the safety factor and failure probability of toe circle slopes are investigated. The results show that the spatial correlation length significantly affects the failure probability, and the vertical integration model is more suitable for the homogeneous toe circle slopes than the horizontal integration model.
      PubDate: 2017-05-08
      DOI: 10.1007/s10064-017-1054-z
  • Determination of the geometrical REV based on fracture connectivity: a
           case study of an underground excavation at the Songta dam site, China
    • Authors: Yanyan Li; Jianping Chen; Yanjun Shang
      Abstract: This paper presents a technique for estimating the geometrical representative elementary volume (REV) of a fractured rock mass based on fracture connectivity. A three-dimensional fracture network model, of dimensions 78 m × 50 m × 50 m, was generated and validated for a granite rock mass using joint data collected from an exploration tunnel at the Songta dam site in southwest China. Two hundred and forty cubic specimens with edge lengths ranging from 1 to 20 m were sampled from the model, and connectivity parameters of each specimen, including the number of intersections per unit volume (C 1) and the intersection length per unit volume (L 1), were calculated. The REV was determined using the connectivity parameters and a series of statistical tests. The results demonstrate that both the C 1- and L 1-based REVs are equal to 11 m × 11 m × 11 m. In this work, the volumetric fracture intensity (P32) was also used to calculate the REV for comparison. The REV obtained by P32 is 9 m × 9 m × 9 m, which is smaller than that calculated by C 1 and L 1. Finally, the geometrical REV for the rock mass by integrating C 1, L 1, and P32 is 11 m × 11 m × 11 m.
      PubDate: 2017-05-05
      DOI: 10.1007/s10064-017-1063-y
  • Analysis of bead wear in diamond wire sawing considering the rock
           properties and production rate
    • Authors: S. Najmedin Almasi; Raheb Bagherpour; Reza Mikaeil; Yilmaz Ozcelik
      Abstract: Predicting the wear rate of diamond beads in the diamond wire sawing process is one of the most important factors in the optimized design and cost estimation of quarrying. This paper aims to predict the wear rate of diamond beads as one of the principal performance criteria in dimension stone quarrying. Saw operating parameters and mechanical and physical properties of rock are the most effective factors on diamond bead wear. In the same working conditions (at constant operating parameters), the wear rate of diamond wire saw is strongly affected by the production rate, and the characteristics of rock. In this study, the uniaxial compressive strength, Schmiazek abrasivity factor, Mohs hardness, and Young’s modulus were selected as the main physical and mechanical properties of rock. The 11 types of igneous rocks were cut in the laboratory using a diamond wire saw and a fully instrumented cutting platform. During the cutting process, the wear rate of diamond beads were determined after each cutting test. The wear rate of diamond bead and rock characteristics were evaluated using simple and multiple curvilinear regression analysis, and prediction models were developed. The developed models were validated by considering the t-test, F-test, correlation coefficient and the plots of predicted versus actual values. The results indicated that the wear rate of diamond beads can be reliably predicted using the developed model.
      PubDate: 2017-05-04
      DOI: 10.1007/s10064-017-1057-9
  • Estimation of rock mass permeability using variation in hydraulic
           conductivity with depth: experiences in hard rocks of western Turkey
    • Authors: Vincenzo Piscopo; Antonella Baiocchi; Francesca Lotti; Emre A. Ayan; Alper R. Biler; Adnan H. Ceyhan; Mert Cüylan; Erkan Dişli; Serkan Kahraman; Melih Taşkın
      Abstract: Determining permeability of fractured rocks is a focal point in engineering projects. Many methods have been developed for direct in situ determination of the hydraulic parameter; nevertheless, especially in the preliminary stages of rock mass characterization, empirical correlations are used to estimate the rock permeability. This study proposes a relationship between rock mass depth and permeability that may be useful for initial hydraulic characterization of fractured media. For this purpose, results of core drilling, injection tests, and geophysical prospecting carried out in fractured hard rocks—mainly andesites and secondly metamorphites—of western Turkey were considered. A decrease in rock mass permeability with depth is evident from the results of injection tests. Within the depth of investigation (the first 100 m), hydraulic conductivity shows an exponential declining trend with depth and depends on the surface value of the hydraulic parameter. No correlation is evident between discontinuity spacing and depth or rock quality designation (RQD) and depth. The applicability of the relationship found requires a hydrostructural homogeneity of the rock mass, which can be verified through inexpensive geological survey and geophysical prospecting.
      PubDate: 2017-05-02
      DOI: 10.1007/s10064-017-1058-8
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