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Image Processing on Geosynthetic Reinforced Layers to Evaluate Shear Strength and Variations of the Strain Profiles
Abstract:This study investigates the reinforcement function of geosynthetics on the shear strength and strain profile of sand. Conducting a series of simple shear tests, the shearing behavior of the samples under static and cyclic loads was evaluated. Three different types of geosynthetics including geotextile and geonets were used as the reinforcement materials. An image processing analysis based on the optical flow method was performed to measure the lateral displacements and estimate the shear strains. It is shown that besides improving the shear strength, the geosynthetic reinforcement leads a remarkable reduction on the shear strains. The improved layer reduces the required thickness of the soil layer to resist against shear stresses. Consequently, the geosynthetic reinforcement can be considered as a proper approach for the sustainable designs, especially in the projects with huge amount of geotechnical applications like subgrade of the pavements, roadways, and railways.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1314855Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 481
 Y. Qian, et al., “Characterization of geogrid reinforced ballast behavior at different levels of degradation through triaxial shear strength test and discrete element modeling”, Geotextiles and Geomembranes (2015), http://dx.doi.org/10.1016/j.geotexmem.2015.04.012.
 C.C.J. Kwan, “Geogrid Reinforcement of Railway Ballast”. Thesis submitted to the University of Nottingham for the degree of Doctor of Philosophy, September 2006.
 E.C. Shin, D.H. Kim and B.M. Das, “Geogrid-reinforced railroad bed settlement due to cyclic load”. Geotechnical and Geological Engineering (2002) 20: 261. doi:10.1023/A:1016040414725.
 G.P. Giroud, and J. Han, (2004). “Design method for geogrid-reinforced unpaved roads; I: Development of design method; II: Calibration and applications”, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 130(8): 775-797.
 U.S. Army Corps of Engineers (2003). “Use of Geogrids in Pavement Construction”. ETL 1110-1-189.
 E. Guler, S. K. Khosrowshahi. 2017 “Evaluation of the Geosynthetic Reinforcement on Railroad Subgrade”. Procedia Engineering, Volume 189, Pages 721-728.
 A. K. Ashmawy, P. L. Bourrdeau, 1998. “Effect of geotextile reinforcement stress-strain and volumetric response of sand”. Proceeding of the Sixth International Conference on Geosynthetics, Vol. 2, Atlanta, pp. 1079 – 1082.
 B. B. Broms, 1977. “Triaxial tests with fabric-reinforced soil. Proceeding of the International Conference on the Use of Fabric in Geotechnics, Vol. 3, Ecole Nationale des Ponts et Chaussees, Paris. pp. 129 – 134.
 R. Hufenus, R. Rueegger, R. Banjac, P. Mayor, S. M. Springman, R. Bronnimann, 2006. “Full-scale field tests on geosynthetic reinforced unpaved roads on soft subgrade”. Geotextiles and Geomembranes 24 (1), 21–37.
 R. Ziaie Moayed, M. Nazari, “Effect of Utilization of Geosynthetic on Reducing the Required Thickness of Subbase Layer of a Two Layered Soil”. International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering Vol:5, No:1, 2011.
 D. Penumadu, “Evaluating clay micro-fabric using scanning electron microscopy and digital information processing”. Transportation Research Record. No 1526, National Research Council. Washington DC (1996). pp112-120.
 R. D. Hryciw, and S. A. Raschke, “Development of Computer Vision Technique for in Situ Soil Characterisation”. Transportation Research Record 1526. Transportation Research Board. Washington (1996). pp86-97.
 B. Muhunthan, and J. Chameau, 1997. “Void fabric tensor and ultimate state surface of soils”. Journal Geotechnical and Geoenvironment Engineering. Volume 123, No 2, pp173-181.
 E. Masad, B. Muhunthan, N. Shashidhar, and T. Harman, 1999. “Internal Structure Characterisation of Asphalt Concrete using Image Analysis”. Journal Computing Civil Engineering. Volume 13, No 2, pp 88-95. USA (1999).
 D. Frost, and D. Jang, 2000. “Evolution of sand microstructure during shear”. Journal of Geotechnical and Geoenvironment Engineering. Volume 126, No 22, New York, pp 116-130.
 K. Alshibli, and S. Sture, “Sand shear band thickness measurement by digital imaging techniques”. Journal of Geotechnical and Geoenvironmental Engineering. Volume 13 No 2, pp 103-109. USA, 1999.
 K. Alshibli, and S. Sture, “Shear Band Formation in Plane Strain Compression”. Journal of Geotechnical and Geoenvironmental Engineering. Volume 126, No 6, pp 495-503. USA, 2000.
 W. Harris, G. Viggiani, M. Mooney, and R. Finno, “Use of stereophotogrammetry to analyse the development of shear bands in sand”. Geotechnical Testing Journal. Volume 18, No 4, pp 405-420. USA, 1995.
 R. Finno, W. Harris, M. Mooney, and G. Viggiani, “Shear Bands in Plane Strain Compression of Loose Sand”. Geotechnique. Volume 47, No 1, pp 149-165. London 1997.
 ASTM D3080, Standard Test Method for Direct Shear Test of Soils under Consolidated Drained Conditions.
 ASTM D2435/T216, One-Dimensional Consolidation Properties of Soils.
 “Geocomp Product Specification for Shear Trac-II-DSS”. http://www.geocomp.com/Products/TT_Cyclic_DSS.
 M. M. Monkul, Yamamuro, A. Jerry, 2010. "Influence of Densification Method on Some aspects of Undrained Silty Sand Behavior". International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 29.