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  Subjects -> ENGINEERING (Total: 2358 journals)
    - CHEMICAL ENGINEERING (201 journals)
    - CIVIL ENGINEERING (192 journals)
    - ELECTRICAL ENGINEERING (107 journals)
    - ENGINEERING (1240 journals)
    - ENGINEERING MECHANICS AND MATERIALS (394 journals)
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CIVIL ENGINEERING (192 journals)                     

Showing 1 - 194 of 194 Journals sorted alphabetically
ACI Structural Journal     Full-text available via subscription   (Followers: 20)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 3)
Acta Structilia : Journal for the Physical and Development Sciences     Open Access   (Followers: 2)
Advances in Civil Engineering     Open Access   (Followers: 37)
Advances in Structural Engineering     Full-text available via subscription   (Followers: 31)
Agregat     Open Access   (Followers: 1)
Ambiente Construído     Open Access   (Followers: 1)
American Journal of Civil Engineering and Architecture     Open Access   (Followers: 33)
Architectural Engineering     Open Access   (Followers: 5)
Archives of Civil and Mechanical Engineering     Full-text available via subscription   (Followers: 2)
Archives of Civil Engineering     Open Access   (Followers: 12)
Archives of Hydro-Engineering and Environmental Mechanics     Open Access   (Followers: 2)
ATBU Journal of Environmental Technology     Open Access   (Followers: 4)
Australian Journal of Structural Engineering     Full-text available via subscription   (Followers: 6)
Baltic Journal of Road and Bridge Engineering     Full-text available via subscription   (Followers: 1)
BER : Building and Construction : Full Survey     Full-text available via subscription   (Followers: 9)
BER : Building Contractors' Survey     Full-text available via subscription   (Followers: 2)
BER : Building Sub-Contractors' Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Building and Construction : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bioinspired Materials     Open Access   (Followers: 5)
Bridge Structures : Assessment, Design and Construction     Hybrid Journal   (Followers: 14)
Building & Management     Open Access   (Followers: 1)
Building and Environment     Hybrid Journal   (Followers: 15)
Building Women     Full-text available via subscription  
Built Environment Project and Asset Management     Hybrid Journal   (Followers: 14)
Bulletin of Pridniprovsk State Academy of Civil Engineering and Architecture     Open Access   (Followers: 6)
Canadian Journal of Civil Engineering     Hybrid Journal   (Followers: 13)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 11)
Case Studies in Structural Engineering     Open Access   (Followers: 9)
Cement and Concrete Composites     Hybrid Journal   (Followers: 19)
Challenge Journal of Concrete Research Letters     Open Access   (Followers: 3)
Challenge Journal of Structural Mechanics     Open Access   (Followers: 6)
Change Over Time     Full-text available via subscription   (Followers: 2)
Civil and Environmental Engineering     Open Access   (Followers: 8)
Civil And Environmental Engineering Reports     Open Access   (Followers: 7)
Civil and Environmental Research     Open Access   (Followers: 17)
Civil Engineering = Siviele Ingenieurswese     Full-text available via subscription   (Followers: 4)
Civil Engineering and Architecture     Open Access   (Followers: 21)
Civil Engineering and Environmental Systems     Hybrid Journal   (Followers: 3)
Civil Engineering and Technology     Open Access   (Followers: 11)
Civil Engineering Dimension     Open Access   (Followers: 10)
Civil Engineering Infrastructures Journal     Open Access   (Followers: 1)
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Composite Structures     Hybrid Journal   (Followers: 272)
Computer-aided Civil and Infrastructure Engineering     Hybrid Journal   (Followers: 11)
Computers & Structures     Hybrid Journal   (Followers: 38)
Concrete Research Letters     Open Access   (Followers: 7)
Construction Economics and Building     Open Access   (Followers: 4)
Construction Engineering     Open Access   (Followers: 11)
Construction Management and Economics     Hybrid Journal   (Followers: 21)
Construction Science     Open Access   (Followers: 5)
Constructive Approximation     Hybrid Journal  
Curved and Layered Structures     Open Access   (Followers: 3)
DFI Journal : The Journal of the Deep Foundations Institute     Hybrid Journal   (Followers: 1)
Earthquake Engineering and Structural Dynamics     Hybrid Journal   (Followers: 17)
Enfoque UTE     Open Access   (Followers: 4)
Engineering Project Organization Journal     Hybrid Journal   (Followers: 7)
Engineering Structures     Hybrid Journal   (Followers: 13)
Engineering Structures and Technologies     Hybrid Journal   (Followers: 2)
Engineering, Construction and Architectural Management     Hybrid Journal   (Followers: 10)
Environmental Geotechnics     Hybrid Journal   (Followers: 5)
European Journal of Environmental and Civil Engineering     Hybrid Journal   (Followers: 9)
Fatigue & Fracture of Engineering Materials and Structures     Hybrid Journal   (Followers: 17)
Frattura ed Integrità Strutturale : Fracture and Structural Integrity     Open Access  
Frontiers in Built Environment     Open Access  
Frontiers of Structural and Civil Engineering     Hybrid Journal   (Followers: 6)
Geomaterials     Open Access   (Followers: 3)
Geosystem Engineering     Hybrid Journal   (Followers: 1)
Geotechnik     Hybrid Journal   (Followers: 3)
Géotechnique Letters     Hybrid Journal   (Followers: 7)
GISAP : Technical Sciences, Construction and Architecture     Open Access  
HBRC Journal     Open Access   (Followers: 2)
Hormigón y Acero     Full-text available via subscription  
HVAC&R Research     Hybrid Journal  
Indonesian Journal of Urban and Environmental Technology     Open Access  
Indoor and Built Environment     Hybrid Journal   (Followers: 2)
Infrastructure Asset Management     Hybrid Journal   (Followers: 2)
Infrastructures     Open Access  
Ingenio Magno     Open Access   (Followers: 1)
Insight - Non-Destructive Testing and Condition Monitoring     Full-text available via subscription   (Followers: 29)
International Journal for Service Learning in Engineering     Open Access  
International Journal of 3-D Information Modeling     Full-text available via subscription   (Followers: 3)
International Journal of Advanced Structural Engineering     Open Access   (Followers: 17)
International Journal of Civil, Mechanical and Energy Science     Open Access   (Followers: 1)
International Journal of Concrete Structures and Materials     Open Access   (Followers: 15)
International Journal of Condition Monitoring     Full-text available via subscription   (Followers: 2)
International Journal of Construction Engineering and Management     Open Access   (Followers: 10)
International Journal of Geo-Engineering     Open Access   (Followers: 3)
International Journal of Geosynthetics and Ground Engineering     Full-text available via subscription   (Followers: 4)
International Journal of Masonry Research and Innovation     Hybrid Journal   (Followers: 1)
International Journal of Pavement Research and Technology     Open Access   (Followers: 6)
International Journal of Protective Structures     Hybrid Journal   (Followers: 6)
International Journal of Steel Structures     Hybrid Journal   (Followers: 2)
International Journal of Structural Engineering     Hybrid Journal   (Followers: 8)
International Journal of Structural Integrity     Hybrid Journal   (Followers: 2)
International Journal of Structural Stability and Dynamics     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Built Environment     Open Access   (Followers: 5)
International Journal of Sustainable Construction Engineering and Technology     Open Access   (Followers: 8)
International Journal on Pavement Engineering & Asphalt Technology     Open Access   (Followers: 7)
International Journal Sustainable Construction & Design     Open Access   (Followers: 1)
Journal of Bridge Engineering     Full-text available via subscription   (Followers: 14)
Journal of Building Engineering     Hybrid Journal   (Followers: 1)
Journal of Building Materials and Structures     Open Access   (Followers: 2)
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 7)
Journal of Civil Engineering and Construction Technology     Open Access   (Followers: 14)
Journal of Civil Engineering and Management     Hybrid Journal   (Followers: 7)
Journal of Civil Engineering and Science     Open Access   (Followers: 9)
Journal of Civil Engineering Research     Open Access   (Followers: 7)
Journal of Civil Engineering, Science and Technology     Open Access   (Followers: 1)
Journal of Civil Society     Hybrid Journal   (Followers: 4)
Journal of Civil Structural Health Monitoring     Hybrid Journal   (Followers: 4)
Journal of Composites     Open Access   (Followers: 80)
Journal of Composites for Construction     Full-text available via subscription   (Followers: 13)
Journal of Computing in Civil Engineering     Full-text available via subscription   (Followers: 23)
Journal of Construction Engineering     Open Access   (Followers: 8)
Journal of Construction Engineering and Management     Full-text available via subscription   (Followers: 18)
Journal of Constructional Steel Research     Hybrid Journal   (Followers: 6)
Journal of Earth Sciences and Geotechnical Engineering     Open Access   (Followers: 4)
Journal of Fluids and Structures     Hybrid Journal   (Followers: 6)
Journal of Frontiers in Construction Engineering     Open Access   (Followers: 2)
Journal of Green Building     Full-text available via subscription   (Followers: 10)
Journal of Highway and Transportation Research and Development (English Edition)     Full-text available via subscription   (Followers: 14)
Journal of Infrastructure Systems     Full-text available via subscription   (Followers: 19)
Journal of Legal Affairs and Dispute Resolution in Engineering and Construction     Full-text available via subscription   (Followers: 5)
Journal of Marine Science and Engineering     Open Access   (Followers: 1)
Journal of Materials and Engineering Structures     Open Access   (Followers: 5)
Journal of Materials in Civil Engineering     Full-text available via subscription   (Followers: 7)
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 9)
Journal of Performance of Constructed Facilities     Full-text available via subscription   (Followers: 3)
Journal of Pipeline Systems Engineering and Practice     Full-text available via subscription   (Followers: 6)
Journal of Rehabilitation in Civil Engineering     Open Access   (Followers: 3)
Journal of Solid Waste Technology and Management     Full-text available via subscription   (Followers: 1)
Journal of Structural Engineering     Full-text available via subscription   (Followers: 36)
Journal of Structural Fire Engineering     Full-text available via subscription   (Followers: 6)
Journal of Sustainable Architecture and Civil Engineering     Open Access   (Followers: 3)
Journal of Sustainable Design and Applied Research in Innovative Engineering of the Built Environment     Open Access   (Followers: 1)
Journal of the Civil Engineering Forum     Open Access  
Journal of the South African Institution of Civil Engineering     Open Access   (Followers: 2)
Journal of Water and Environmental Nanotechnology     Open Access  
Jurnal Spektran     Open Access   (Followers: 1)
Jurnal Teknik Sipil dan Perencanaan     Open Access   (Followers: 1)
Konstruksia     Open Access  
KSCE Journal of Civil Engineering     Hybrid Journal   (Followers: 2)
Latin American Journal of Solids and Structures     Open Access   (Followers: 4)
Materiales de Construcción     Open Access   (Followers: 1)
Mathematical Modelling in Civil Engineering     Open Access   (Followers: 4)
Nondestructive Testing And Evaluation     Hybrid Journal   (Followers: 15)
npj Materials Degradation     Open Access  
Obras y Proyectos     Open Access   (Followers: 1)
Open Journal of Civil Engineering     Open Access   (Followers: 9)
Photonics and Nanostructures - Fundamentals and Applications     Hybrid Journal   (Followers: 3)
Practice Periodical on Structural Design and Construction     Full-text available via subscription   (Followers: 3)
Proceedings of the Institution of Civil Engineers - Bridge Engineering     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Civil Engineers - Civil Engineering     Hybrid Journal   (Followers: 13)
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law     Hybrid Journal   (Followers: 9)
Proceedings of the Institution of Civil Engineers - Municipal Engineer     Hybrid Journal   (Followers: 2)
Proceedings of the Institution of Civil Engineers - Structures and Buildings     Hybrid Journal   (Followers: 3)
Promet : Traffic &Transportation     Open Access  
Random Structures and Algorithms     Hybrid Journal   (Followers: 5)
Research in Nondestructive Evaluation     Hybrid Journal   (Followers: 6)
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Road Materials and Pavement Design     Hybrid Journal   (Followers: 11)
Russian Journal of Nondestructive Testing     Hybrid Journal   (Followers: 5)
Science and Engineering of Composite Materials     Hybrid Journal   (Followers: 61)
Selected Scientific Papers - Journal of Civil Engineering     Open Access   (Followers: 3)
Slovak Journal of Civil Engineering     Open Access   (Followers: 2)
Soils and foundations     Full-text available via subscription   (Followers: 5)
Steel Construction - Design and Research     Hybrid Journal   (Followers: 4)
Structural and Multidisciplinary Optimization     Hybrid Journal   (Followers: 10)
Structural Concrete     Hybrid Journal   (Followers: 11)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 8)
Structural Engineering International     Full-text available via subscription   (Followers: 11)
Structural Mechanics of Engineering Constructions and Buildings     Open Access   (Followers: 1)
Structural Safety     Hybrid Journal   (Followers: 6)
Structural Survey     Hybrid Journal  
Structure     Full-text available via subscription   (Followers: 24)
Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance     Hybrid Journal   (Followers: 12)
Structures     Hybrid Journal   (Followers: 1)
Study of Civil Engineering and Architecture     Open Access   (Followers: 10)
Superlattices and Microstructures     Hybrid Journal   (Followers: 2)
Surface Innovations     Hybrid Journal  
Technical Report Civil and Architectural Engineering     Open Access   (Followers: 1)
Teknik     Open Access  
The IES Journal Part A: Civil & Structural Engineering     Hybrid Journal   (Followers: 6)
The Structural Design of Tall and Special Buildings     Hybrid Journal   (Followers: 5)
Thin Films and Nanostructures     Full-text available via subscription   (Followers: 2)
Thin-Walled Structures     Hybrid Journal   (Followers: 4)
Transactions of the VŠB - Technical University of Ostrava. Construction Series     Open Access   (Followers: 1)
Transportation Geotechnics     Full-text available via subscription   (Followers: 1)
Transportation Infrastructure Geotechnology     Hybrid Journal   (Followers: 8)
Underground Space     Open Access  
Water Science & Technology     Partially Free   (Followers: 25)
Water Science and Technology : Water Supply     Partially Free   (Followers: 22)

           

Journal Cover International Journal of Geosynthetics and Ground Engineering
  [4 followers]  Follow
    
   Full-text available via subscription Subscription journal
   ISSN (Print) 2199-9260 - ISSN (Online) 2199-9279
   Published by Springer-Verlag Homepage  [2351 journals]
  • Slope Stability in Swelling Soils Using Cement Grout: A Case Study
    • Authors: Ako Daraei; Bengin M. A. Herki; Aryan Far H. Sherwani; Shokrollah Zare
      Abstract: Control and stabilization of swelling soils have been a basic challenge in geotechnical engineering since 1970s till now. Major stabilization methods applied for swelling soils lead to minimum one of the disadvantages of high construction cost, laboratory-scale application, implementation only in flat areas and diseases caused by the use of chemical materials. Several instabilities and collapses have happened in side slopes excavated in swelling soils of the under construction highways of Iraq-Kurdistan. This necessitates presenting a method statement to decrease and control swelling potentials. This study aims to describe the cement grouting method applied in Salaheddin side slope which is known as one of the most critical instabilities of Erbil–Haj Omran highway where the optimal grout content was first determined in the laboratory and then it was used in the project as the consolidation grouting. Results indicated that the soil swelling decreases for > 90% by injecting 6% of cement grout. The grouting also increases the uniaxial compressive strength of the soil for more than two times.
      PubDate: 2018-02-12
      DOI: 10.1007/s40891-018-0127-9
      Issue No: Vol. 4, No. 1 (2018)
       
  • Predicting Swelling Behavior of a Na + -Bentonite Used in GCLs
    • Authors: Jin-Chun Chai; Shui-Long Shen
      Abstract: The swelling behavior of a Na+-bentonite used in geosynthetic clay liners with lower dry unit weights (less than about 11 kN/m3) was investigated experimentally, and analyzed by diffuse double layer (DDL) theory. Four types of liquid were used. It has been found that the measured swelling pressures are about 20% of that predicted by DDL theory. There are linear relationships between the calculated double layer thickness and the measured corresponding free swelling index and liquid limit.
      PubDate: 2018-01-25
      DOI: 10.1007/s40891-018-0126-x
      Issue No: Vol. 4, No. 1 (2018)
       
  • A Study on Geotextile—Sand Interface Behavior Based on Direct Shear and
           Triaxial Compression Tests
    • Authors: Ioannis N. Markou
      Abstract: The effect of shear box size, geotextile type and properties and sand grain shape and size on the sand–geotextile interaction was investigated experimentally by conducting interface tests with conventional (100 mm) and large-scale (300 mm) direct shear boxes. Triaxial compression tests were also conducted on reinforced sand samples in order to evaluate the effectiveness of a methodology developed for obtaining interface friction coefficient values. Four uniform sands, one with subangular grains and three with rounded grains of different sizes were tested in dry and dense condition. Seven nonwoven polypropylene geotextiles of various types and properties and seven woven geotextiles with or without apertures were used in the tests. The conventional shear box is satisfactory for testing materials like those used in the present investigation because it gave comparable interface friction coefficient values to those obtained by the large-scale shear box. The sand–geotextile interaction behavior depends on the surface characteristics of the geotextiles and the interlocking of sand grains in geotextile apertures. The rounded shape and decrease in size of sand grains more effectively mobilize the soil–geotextile interface friction. The results of triaxial compression tests are in quantitative and qualitative agreement with the results of direct shear tests, for geotextiles without apertures. The friction efficiency for geotextiles with apertures obtained from triaxial compression tests attains a maximum value for an aperture ratio (aperture size of geotextile / mean grain size of sand) value approximately equal to 1.9, in agreement with the results of other studies.
      PubDate: 2018-01-15
      DOI: 10.1007/s40891-017-0121-7
      Issue No: Vol. 4, No. 1 (2018)
       
  • Interface Shear Strength Properties of Gravel Bases and Subgrades with
           Various Reinforcements
    • Authors: G. Narendra Goud; B. Umashankar
      Abstract: Reinforcing pavement layers with geosynthetics improve the pavement performance significantly. In addition to the use of geosynthetics, the hexagonal–steel–wire mesh has gained popularity as a reinforcing material in pavements. The interface shear property of pavement material and reinforcement is an important input parameter in numerical modeling of the reinforced pavement system. In this study, the interface shear parameters of various pavement materials, namely poor subgrade, fair subgrade, gravel base (GB), and gravel surface (GS) with geogrid and hexagonal–wire–mesh reinforcements is obtained using large-size direct shear test apparatus. GS and GB mixes are selected from Indian rural roads specification of unpaved surface and base layers of the pavement. In addition, the effect of the size of the aperture of geogrid reinforcement on interface properties is studied by considering two types of biaxial geogrids of different aperture sizes. The interface shear strength and interaction coefficients of different reinforcement types with pavement materials are also proposed. The interaction coefficients of three reinforcement types with the pavement materials considered in the study are found to range from 0.82 to 1.45. The interface shear modulus of different interfaces considered in this study ranges from about 12165–57337 kPa/m corresponding to normal streeses in the range of 30–90 kPa.
      PubDate: 2018-01-12
      DOI: 10.1007/s40891-017-0124-4
      Issue No: Vol. 4, No. 1 (2018)
       
  • Predicting CBR Value of Stabilized Pond Ash with Lime and Lime Sludge
           Using ANN and MR Models
    • Authors: Manju Suthar; Praveen Aggarwal
      Abstract: In the present study, a multilayer perception-artificial neural network and multiple regression model is developed for predicting the California bearing ratio (CBR) value of stabilized pond ash. Pond ash collected from Panipat thermal plant is stabilized with lime (2, 4, 6 and 8%) alone and in combination with lime sludge (5, 10 and 15%). Total 51 datasets of experimentally observed CBR value were used in the development of models. Fitness of the model was observed through three statistical parameters i.e. coefficient of correlation (CC), root mean square error (RMSE) and mean absolute error. Both the models predict CBR value with high degree of accuracy having CC more than 0.96. From the sensitivity analysis, it is observed that curing period is the most significant parameter affecting the CBR value of stabilized pond ash.
      PubDate: 2018-01-11
      DOI: 10.1007/s40891-017-0125-3
      Issue No: Vol. 4, No. 1 (2018)
       
  • Reliability Based LRFD of Geomembrane Liners for V-Shaped Anchor Trenches
           of MSW Landfills
    • Authors: K. V. N. S. Raviteja; B. Munwar Basha
      Abstract: The main objective of design of V-shaped anchor trenches is to ensure safety against the pullout failure in Geomembrane (GMB) liners efficiently. Uncertainties related to soil-liner interface frictional angle, allowable GMB tensile force, and the unit weight of the cover/backfill soil can be quantified through probabilistic means. Load and Resistance Factor Design approach involves reliability theory in the evaluation of load and resistance factors. The present study focuses on the application of reliability based load and resistance factor design of V-shaped anchor trenches. This paper gives a clear guideline for the successful performance of anchor trenches against pullout failure in handling the variability of soil-liner interface frictional angle, allowable GMB tensile force, and the unit weight of the cover/backfill soil. Target reliability approach is used to estimate the probability of pullout failure of GMB liner. The results of the study can be used to understand the response of the anchor trench for variable loads. The study recommends the resistance and the load factors for the design of V-shaped anchor trenches of MSW Landfills.
      PubDate: 2018-01-10
      DOI: 10.1007/s40891-017-0123-5
      Issue No: Vol. 4, No. 1 (2018)
       
  • Numerical Simulation of the Response of Geosynthetic Encased Stone Columns
           Under Oil Storage Tank
    • Authors: Sithara Pamangattu Muzammil; Renjitha Mary Varghese; Jerin Joseph
      Abstract: Geosynthetic encased stone columns (GESCs) are a newly developed technique in which stone columns are wrapped with geosynthetic to overcome some of the limitations of ordinary stone columns (OSCs) through the additional confinement provided by the geosynthetic. This paper presents the behavior of GESCs under circular oil storage tank and its comparison with OSCs under the same in situ conditions using PLAXIS 3D. In this paper, initial studies were carried out to understand the mechanism of load carrying capacity of soils reinforced with stone columns and the later observations from the parametric studies supported the conclusions. The various parameters considered in this investigation include the effect of encasement stiffness and length on settlement and lateral deformation of stone columns. The results show that with an increase in stiffness value, there is a considerable reduction in the long-term settlement and lateral deformation of GESCs. It was found that settlement reduced by up to 55% and lateral deformation by up to 68% with an increase in geosynthetic stiffness from 1000 to 10,000 kN/m. Meanwhile the encasement length up to six times the diameter was found as the optimum encasement length to get the same performance as that of fully encased stone columns. Further a suitable arrangement of encased stone columns in terms of encasement length has been developed to economize the consumption of geosynthetic without compromising the performance of GESCs.
      PubDate: 2018-01-03
      DOI: 10.1007/s40891-017-0122-6
      Issue No: Vol. 4, No. 1 (2018)
       
  • A New Failure Load Criterion for Large-Diameter Under-Reamed Piles:
           Practical Perspective
    • Authors: Lei Zhang; Qingsheng Chen; Guang-yun Gao; Sanjay Nimbalkar; Gabriele Chiaro
      Abstract: Sustainable performance of heavy structures such as tanks, storage yards and tall buildings often rely on an efficient transfer of vertical and lateral loads to underlying ground. If the foundation soil does not have sufficient strength, the piles may be belled out (under-reamed) at the base, often termed as large-diameter belled piles (LDBPs). In reality the deformation and failure mechanism of LDBPs are significantly different and are influenced by the nature of foundation soil. However, in the absence of appropriate design guidelines, LDBPs are simply treated as conventional straight piles, often ignoring enlarged base. To access effects of enlarged base on load-deformation behavior, full-scale load tests are conducted on several LDBPs. A novel interpreted failure load criterion is proposed for LDBPs. The general applicability of this criterion is verified using the data from nine independent pile load tests retrieved from four different projects across China. Adopting the proposed method, provision of a much effective and economic design for LDBPs is feasible in comparison with the criteria currently prevalent in practice.
      PubDate: 2018-01-02
      DOI: 10.1007/s40891-017-0120-8
      Issue No: Vol. 4, No. 1 (2018)
       
  • A Comparative Numerical Study on Soil–Geosynthetic Interactions Using
           Large Scale Direct Shear Test and Pullout Test
    • Authors: A. Hegde; R. Roy
      Abstract: The direct shear test and the pullout tests are two widely used test procedures for determining the properties of the soil–geosynthetic interface. It is evident from the previous literature that the interface properties obtained from these tests differ considerably. In the present study, an attempt has been made to compare the interface properties obtained from the direct shear test and the pullout tests using the numerical simulations. A nonwoven polypropylene geotextile was used in the study. Three different types of sands with different fines content were considered. The analyses were carried using finite element package PLAXIS2D in two dimensional frameworks. Initially, the numerical model was validated with the existing literature and the validated model was used to study the interface behaviour of the sand-geotextile interface. The results revealed that the interface properties obtained from the direct shear test and the pullout tests vary significantly. The presence of the fines content in the soil reduces the frictional resistance of the soil-geotextile interface. The interaction ratio value was found to vary between 0.67 and 0.97 for different types of sand. The friction coefficient of the pullout test was about 50% of the friction coefficient value obtained from the direct shear test. The friction angles obtained from the pullout test were found to vary between 30 and 50% of the direct shear tests. However, the apparent cohesion of the pullout test was found approximately four times the cohesion value obtained from the direct shear test.
      PubDate: 2017-12-22
      DOI: 10.1007/s40891-017-0119-1
      Issue No: Vol. 4, No. 1 (2017)
       
  • Analysis of Reinforced Unpaved Roads by Modified Structural Number Method
    • Authors: Avinash Kumar Singh; Satyendra Mittal
      Abstract: By inclusion of geosynthetics in cross-sections of pavements, either traffic capacity of pavements can be enhanced for the same structural section or structural section can be reduced for the same traffic capacity. In the past research works, two methods were mainly adopted for the analysis of reinforced pavements, one is by conducting static plate load tests over unpaved roads on the basis of subgrade bearing capacity failure and secondly by applying dynamic or cyclic loads on the paved sections and determining the traffic benefit on the basis of rutting failure criterion. In the present research study, an effort has been made to evaluate the performance of road sections reinforced with geosynthetics using AASHTO 1993 Method. The structural number (SN), which denotes the strength of the pavements, has been modified using load equivalency factor concept. The unpaved sections were reinforced in a single layer at interface and within the subgrade layer at different positions. The maximum load intensities at a settlement of 12.5 mm in unreinforced and reinforced sections were converted into Equivalent Single Axle Load at the surface of pavement using Botswana guidelines on the basis of axle load surveys (2000). Using Load equivalency factor concept, new traffic capacities were determined followed by calculation of modified SNs for reinforced sections using AASHTO 1993 Design equation. The structural contribution of geosynthetics has been quantified in the terms of Base Course Reduction (BCR) values, which is defined as the percentage reduction in structural section of base course layer for reinforced sections as compared to unreinforced section. Laboratory tests were conducted to determine the grain size distribution and other important physical parameters of soil used for preparing subgrade. It is clear from the results that there is a considerable increase in load carrying capacity of unpaved sections due to reinforcements achieving an average BCR value of about 44%, with bi-axial geogrid (BX2020) and about 30% with CE121 geonet when reinforced within top one-third of subgrade layer.
      PubDate: 2017-12-18
      DOI: 10.1007/s40891-017-0115-5
      Issue No: Vol. 4, No. 1 (2017)
       
  • Modeling of Compaction Grouting Technique with Development of Cylindrical
           Cavity Expansion Problem in a Finite Medium
    • Authors: Neha Shrivastava; Kouki Zen; Sanjay Kumar Shukla
      Abstract: The compaction grouting (CPG) method is relatively a new ground improvement technique for mitigating the liquefaction problem. In this technique, a stiff mortar is injected under high pressure that displaces and compacts the surrounding soil. Though the application of the method has been mainly dependent on the field tests, practical experience and empiricism, the compactive mechanism of CPG is not well understood. The objective of the present study is to bring out its compactive mechanism in its densification and confining effect. This paper presents an analytical solution for the process of CPG simulating it as an expansion of a cylindrical cavity in a finite medium. Effect of CPG is quantified as an increase in lateral earth pressure at any stage of applied injection pressure normalized with initial hydrostatic pressure and in terms of a densification factor. Predictions are made to reveal the behavior of CPG-treated soil in three states of density, namely as comparatively loose, medium and dense. Design charts are developed for liquefaction resistance parameter of CPG, RCPG, based on the present model of cavity expansion theory. It has been found that the design methods for CPG-improved ground should account for the coefficient of earth pressure at rest.
      PubDate: 2017-12-02
      DOI: 10.1007/s40891-017-0117-3
      Issue No: Vol. 3, No. 4 (2017)
       
  • Effect of Seasonal Changes on a Hybrid Soil–Geofoam Embankment
           System
    • Authors: Ali Shafikhani; Tejo V. Bheemasetti; Anand J. Puppala
      Abstract: The effects of climatic variations on the performance of the bridge infrastructure were not adequately addressed. This paper presents a comprehensive analysis of the effect of seasonal temperature and precipitation variations on a bridge infrastructure located in Johnson County, Texas. This bridge has undergone a rehabilitation process by partially replacing the embankment soil with lightweight expanded polystyrene geofoam (EPS geofoam) to reduce bridge approach slab settlements. Four years of monitored vertical deformation and pressure cell data from the field instrumentation was used to analyze the performance of the bridge slab and adjoining roadway pavement system. From the analysis, it was observed that the vertical pressures and total deformations were increased with an increase in temperature and were decreased with a decrease in temperature. Also, with an increase in the temperature, it was observed that the bridge retaining wall exerted lateral pressure on the geofoam blocks and with a decrease in temperature the pressures decreased considerably. This study highlights the observations made on the bridge approach slab and adjoining roadway pavement vertical deformations with respect to temperature and precipitation variations.
      PubDate: 2017-11-29
      DOI: 10.1007/s40891-017-0116-4
      Issue No: Vol. 3, No. 4 (2017)
       
  • Empirical and Numerical Analyses of Tunnel Closure in Squeezing Rock
    • Authors: Manasa Hanumanthappa; V. B. Maji
      Abstract: Squeezing is one of the major problems during tunnel construction in weak geological formations. There are empirical and semi-empirical solutions available to capture squeezing behavior in rocks given by many researchers based on extensive case studies. An investigation showed that these solutions are not always consistent and many times found to underestimate the behavior of rock mass for squeezing failure. So these solutions can be considered as preliminary estimates in predicting squeezing problem and can’t be considered as the final solution in designing the structure. In the present study, numerical analysis of a case study is been carried out using FLAC after investigating with empirical methods. Numerical analysis is performed using Generalised Hoek–Brown (GHB) criterion and the displacements obtained systematically compared with the observed values from the field. The numerical model is found to be efficient in capturing the deformation characteristics and squeezing behavior of the tunnel. The study advocates the applicability of numerical modeling in complimenting empirical analyses for better prediction of the tunnel deformation behavior in squeezing rocks.
      PubDate: 2017-11-20
      DOI: 10.1007/s40891-017-0118-2
      Issue No: Vol. 3, No. 4 (2017)
       
  • Use of Polyamide-6 Type Engineering Polymer as Grouted Rock Bolt Material
    • Authors: Eren Komurlu; Ayhan Kesimal; C. Okay Aksoy
      Abstract: In this study, usability of Polyamide-6 type engineering polymer as a new rock bolt material was investigated carrying out a series of laboratory and field scale experiments. The Polyamide-6 type polymer tested as a grouted rock bolt material was assessed to have a good body strength, large elastic deformation limit and high energy absorbing capacity. The load bearing capacity of Polyamide-6 rock bolts was found to dominantly depend on the mechanical anchorage in front of the shank as a result of having low adhesion to the cement grout values. In this study, polyamide rock bolts have been designed with different mechanical anchors. It was suggested to start the systematical use of polyamide rock bolts having ideal support reactions under both static and dynamic load conditions in rock engineering. Especially, Polyamide-6 rock bolts were assessed to be economically usable in rock masses with squeezing, swelling or bursting problem, which need for non-decreasing support pressure while being higly deformed and good energy absorption capacity.
      PubDate: 2017-11-08
      DOI: 10.1007/s40891-017-0114-6
      Issue No: Vol. 3, No. 4 (2017)
       
  • Performance of Granular Piles-Improved Soft Ground Under Raft Foundation:
           A Numerical Study
    • Authors: Mohamed B. D. Elsawy; Basuony El-Garhy
      Abstract: Reinforcing soft soil with granular piles improves effectively its properties. In the current research, the performance of granular piles reinforced soft soil under a uniformly loaded raft foundation has been investigated numerically utilizing Plaxis 3D. A parametric study was performed under drained loading conditions to investigate the effect of various parameters on the long-term behavior of the raft foundation such as spacing distance, diameter and length of the granular piles. The influence of the parameters has been studied on the overall settlement, bending moment of the raft and the lateral bulging of the granular piles. The results indicated that the existence of the granular piles in soft soil decreases significantly the settlement and the bending moment of the raft. The lateral bulging distribution of the granular piles is dependent on their locations. Additional improvements in the settlement and the bending moment of the raft, and in the lateral bulging also occurred due to the decrease of the spacing ratio, and the increase of area replacement ratio and granular piles length. Reinforcing soft soil using floating ground piles with length to soil layer thickness ratio of 0.75 is sufficient to achieve good improvement performance.
      PubDate: 2017-10-27
      DOI: 10.1007/s40891-017-0113-7
      Issue No: Vol. 3, No. 4 (2017)
       
  • Application of ANN and ANFIS for Predicting the Ultimate Bearing Capacity
           of Eccentrically Loaded Rectangular Foundations
    • Authors: B. P. Sethy; C. R. Patra; N. Sivakugan; B. M. Das
      Abstract: Extensive laboratory model tests were conducted on a rectangular embedded foundation resting over homogeneous sand bed and subjected to an eccentric load to determine the ultimate bearing capacity. Tests were conducted for foundations with width-to-length ratios (B/L) of zero (strip case), 0.333, 0.5, and 1. The depth of embedment varies from 0 to 1B with an increment of 0.5B; where B is the width of foundation and the eccentricity ratio (e/B) varies from 0 to 0.15 with an increment of 0.05. Based on the laboratory model test results, two different approaches are proposed to determine the ultimate bearing capacity. Firstly, a neural network model is developed to estimate the reduction factor. The reduction factor can be used to estimate the ultimate bearing capacity of an eccentrically loaded foundation from the ultimate bearing capacity of a centrally loaded foundation. A thorough sensitivity analysis was carried out to determine the important parameters affecting the reduction factor. Importance was given to the construction of neural interpretation diagram. Based on this diagram, whether direct or inverse relationships exist between the input and output parameters were determined. Secondly, an adaptive neuro-fuzzy interface system (ANFIS) is used to predict the ultimate bearing capacity. The neuro-fuzzy models combine the transparent, linguistic representation of a fuzzy system with learning ability of artificial neural networks (ANNs). The results from the ANN and ANFIS were compared with the laboratory model test results. It is clearly seen that the performance of the ANFIS model in our study is better than that of the ANN model.
      PubDate: 2017-10-24
      DOI: 10.1007/s40891-017-0112-8
      Issue No: Vol. 3, No. 4 (2017)
       
  • Stress and Deformation Characteristics of Nonwoven Geotextile Reinforced
           Sand Under Different Directions of Principal Stress
    • Authors: Alaa H. J. Al-Rkaby; H. R. Nikraz; A. Chegenizadeh
      Abstract: A series of drained torsional shear tests using a hollow cylinder apparatus HCA was performed to investigate the anisotropic characteristics of sand in terms of the stress–strain and volumetric changes of large scale sand samples reinforced with nonwoven geotextile under different directions of principal stress α. Results revealed that the inclusion of geotextile resulted in a significant increase in the peak deviator stress when α was 0°, 15° and 30°, corresponding with considerable restraint against the expansion strain of the samples. When α was rotated towards the horizontal, α = 60–90°, reinforced samples exhibited clear anisotropic behavior. Variations in the peak deviator stress between the maximum value occurred at α = 0° and minimum at α = 60° was about 30–47% (depending on the number of geotextile layers). This indicates that the ability of layers embedded horizontally resisting the shearing decreased as the principal stress rotated towards the bedding plane. Under the conditions of α = 60–90° tensile strength of the geotextile could not be mobilized to the same extent, compared to α = 0–30°. Larger values of α resulted in less expansion strain of the reinforced samples.
      PubDate: 2017-10-16
      DOI: 10.1007/s40891-017-0111-9
      Issue No: Vol. 3, No. 4 (2017)
       
  • Full-Scale Laboratory Accelerated Test on Geotextile Reinforced Unpaved
           Road
    • Authors: G. S. Ingle; S. S. Bhosale
      Abstract: This paper examines the behavior of full-scale unreinforced and geotextile reinforced unpaved road using an indigenously developed full-scale laboratory accelerated pavement testing set up. The models of the unpaved road were subjected to 35,000 loading cycles of standard axle load. The effect of reinforcement on the vertical stress distribution at the base–subgrade interface was investigated. The test results show that the inclusion of geotextile significantly reduced the magnitude of vertical stress in the reinforced road as compared with the unreinforced road. This reduction of vertical stress magnitude is comparable to 9°–16° increases in the stress distribution angle; this may be attributed to stretching of the geotextile due to the tendency of lateral spreading of aggregates in the base course. The limited number of load cycles confirmed the lateral restraint of base course aggregates by the geotextile reinforcement and thus a reduction in the magnitude of vertical stress. The test results also confirmed about 22% reduction in base course thickness due to geotextile reinforcement, thus one step towards sustainability by saving of the expensive natural base course aggregate.
      PubDate: 2017-09-30
      DOI: 10.1007/s40891-017-0110-x
      Issue No: Vol. 3, No. 4 (2017)
       
  • Combined Use of Jute Geotextile-EPS Geofoam to Protect Flexible Buried
           Pipes: Experimental and Numerical Studies
    • Authors: Y. Z. Beju; J. N. Mandal
      Abstract: This paper addresses the results of the experimental and numerical studies conducted on 4.2 mm thickness and 110 mm diameter high-density polyethylene (HDPE) pipes buried in fly ash material overlying stone dust beds. The model tests were performed using single and double layers of expanded polystyrene (EPS) geofoam as compressible inclusions. In addition to that, jute geotextile was used as a reinforcement for the infill fly ash along with EPS geofoam inclusion to obtain induced trench condition. The test beds were subjected to loading on the fly ash surface with the help of a rigid steel plate to simulate as a strip footing in different embedment depths of the pipe (1–3 times pipe diameter). The test results revealed that the pressure and strain values in the pipe reduced significantly in the presence of EPS geofoam and jute geotextile related to the location of the pipe. In the case of double layers of EPS geofoam could induce reduction of the pressure up to 87.2% and strain about 63.5% respectively depending on the density and width of EPS geofoam. Whereas, at the same burial depth, in the presence of jute geotextile together with EPS geofoam can be reduced up to 93.8 and 73.4% for pressure and strain respectively depending on EPS geofoam density and number of reinforcement. Moreover, the jute geotextile-EPS geofoam combination of model test results were validated with finite element program. A good agreement was observed on pressure-settlement response and pipe strain between experimental and numerical investigations. The numerical studies show that the jute geotextile distributes stresses in the lateral direction and then the stresses on the pipe significantly reduced.
      PubDate: 2017-09-30
      DOI: 10.1007/s40891-017-0107-5
      Issue No: Vol. 3, No. 4 (2017)
       
  • Utilizing PVDs to Provide Shear Strength to Saturated Fine-Grained
           Foundation Soils
    • Authors: Robert M. Koerner; Maxwell R. Koerner; George R. Koerner
      Abstract: This paper describes a major case history failure of 300,000 m3 of soft foundation soil (while being surcharged) that used sand drains to shorten the consolidation time. It occurred in 1960 and has never been reported in the open literature. Using data from this case history a computer analysis is used illustrating the situation and concerns involved. With the advent of prefabricated vertical drains, the hypothetical installation of PVDs is counterpointed to this same sand drain case history showing how factors-of-safety are increased. Used are laboratory generated tensile strengths of commercial PVDs at various angles using a special apparatus developed for the first time and reported herein. The factors-of-safety against the actual case history foundation soil failure increases by approximately 4% using commercially available PVDs at typical spacings. Using stronger PVDs and/or closer spacings there is no limit as to potential increases in factors-of-safety. To the authors knowledge this is the first time that PVDs used for site drainage have been considered as reinforcement materials insofar as foundation soil stability is concerned. We hope that further advances can be made in this regard.
      PubDate: 2017-09-27
      DOI: 10.1007/s40891-017-0108-4
      Issue No: Vol. 3, No. 4 (2017)
       
 
 
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