The Experts below are selected from a list of 10719 Experts worldwide ranked by ideXlab platform
P. K. Basudhar - One of the best experts on this subject based on the ideXlab platform.
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modeling of soil woven geotextile interface behavior from Direct Shear Test results
Geotextiles and Geomembranes, 2010Co-Authors: P. K. BasudharAbstract:Abstract Apart from other factors, the performance of geosynthetic reinforced soil structures depends also on the characteristics and behavior of the interface between soil and geosynthetic. Experiments were conducted in a Direct Shear Test apparatus to study the Shear force–displacement behavior at the soil–geotextile interface using two differently textured woven geotextiles. Analyzing the data so obtained a non-linear constitutive model has been presented for predicting both the pre-peak and the post-peak interface behavior. The predictions made by the developed model are found to be in good agreement with experimental data obtained from Direct Shear Tests.
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Modeling of soil–woven geotextile interface behavior from Direct Shear Test results
Geotextiles and Geomembranes, 2010Co-Authors: Anubhav, P. K. BasudharAbstract:Abstract Apart from other factors, the performance of geosynthetic reinforced soil structures depends also on the characteristics and behavior of the interface between soil and geosynthetic. Experiments were conducted in a Direct Shear Test apparatus to study the Shear force–displacement behavior at the soil–geotextile interface using two differently textured woven geotextiles. Analyzing the data so obtained a non-linear constitutive model has been presented for predicting both the pre-peak and the post-peak interface behavior. The predictions made by the developed model are found to be in good agreement with experimental data obtained from Direct Shear Tests.
Anubhav - One of the best experts on this subject based on the ideXlab platform.
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Modeling of soil–woven geotextile interface behavior from Direct Shear Test results
Geotextiles and Geomembranes, 2010Co-Authors: Anubhav, P. K. BasudharAbstract:Abstract Apart from other factors, the performance of geosynthetic reinforced soil structures depends also on the characteristics and behavior of the interface between soil and geosynthetic. Experiments were conducted in a Direct Shear Test apparatus to study the Shear force–displacement behavior at the soil–geotextile interface using two differently textured woven geotextiles. Analyzing the data so obtained a non-linear constitutive model has been presented for predicting both the pre-peak and the post-peak interface behavior. The predictions made by the developed model are found to be in good agreement with experimental data obtained from Direct Shear Tests.
Manojit Samanta - One of the best experts on this subject based on the ideXlab platform.
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microstructural investigation on mechanical behavior of soil geosynthetic interface in Direct Shear Test
Geotextiles and Geomembranes, 2017Co-Authors: Piyush Punetha, Piyush Mohanty, Manojit SamantaAbstract:Abstract Interface Shear strength between soil and geosynthetics mainly depends on the mechanical and physical properties of soil, geosynthetics and the normal stress acting at the interface. This paper presents results of an extensive experimental investigation carried out on sand-geosynthetic interface using modified large Direct Shear box. The study focusses on the Shearing mechanism at the sand-geosynthetic interface and the effect of different parameters on the Shearing mechanism. Smooth HDPE geomembrane, nonwoven needle punched geotextile and two types of sand having different mean particle size, have been used in the present study. Microstructural investigation of deformed specimen through Field Emission Scanning Electron Microscope (FESEM) reveals the Shearing mechanism which includes interlocking and fiber stretching for sand-geotextile while sliding, indentation and plowing for sand-geomembrane interface. The Shearing mechanism for sand-geomembrane interface highly depends on the normal stress and degree of saturation of sand. The critical normal stress that demarcates the sliding and plowing mechanism for sand-geomembrane interface is different for dry and wet sand. The amount of scouring (or plowing) of the geomembrane surface reduces with increase in the mean particle size of sand. FESEM images revealed that the sand particles get adhered to the geotextile fibers for Tests involving wet sands. The present microstructural study aided in understanding the Shearing mechanism at sand-geosynthetic interface to a large extent.
Jianhang Chen - One of the best experts on this subject based on the ideXlab platform.
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Shear behaviour of a cement grout Tested in the Direct Shear Test
Construction and Building Materials, 2018Co-Authors: Jianhang Chen, Paul Hagan, Serkan SaydamAbstract:Abstract Portland cement grouts are widely used in the mining industry to bond cable bolts with the surrounding rockmass. Numerous laboratory and field Tests showed that bond failure of the cable/grout interface is the dominant failure mode. Previous research has found that Shear behaviour of the grout along a pre-defined plane plays a significant role in determining the nature of the bond failure in a cable bolt reinforcement system. In this study, the Shear behaviour of a Portland cement grout was investigated based on a Direct Shear Test. Two different boundary conditions were considered being a constant normal load (CNL) and constant normal stiffness (CNS). Under CNL condition, five different normal pressures between 0.1 MPa and 6.0 MPa were examined. While under CNS condition, the initial normal pressure was set to value within the same range. Also, a CNS of 10 kN/m was added. The cohesion, internal friction angle and Shear strength of the grout were acquired. The results showed that there is a linear relationship between the Shear strength of the grout and resultant normal pressure. However, under the CNS condition, the Shear strength of the grout was found to be generally higher comparing to the CNL condition, most likely because sample dilation resulted in an increase in the normal pressure. Consequently, Shear strength of the grout also increased.
V Prashanth - One of the best experts on this subject based on the ideXlab platform.
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pullout Tests using modified Direct Shear Test setup for measuring soil geosynthetic interaction parameters
International Journal of Geosynthetics and Ground Engineering, 2016Co-Authors: V Prashanth, Murali A Krishna, Sujit Kuma DashAbstract:Soil–geosynthetic interaction parameters and their determination play a vital role in the design of reinforced soil structures. Direct Shear Test and/or pullout Test are commonly used to determine the interaction parameters. Often, it is economically viable to obtain these parameters through existing Test setups that are conventionally used in geotechnical engineering. However, the existing Test setups need certain modifications, to facilitate the requirement for the specialized Tests. This paper introduces modifications to the large size (300 mm × 300 mm) Direct Shear Test setup for evaluating the soil–geosynthetic interaction parameters under pullout. The Shear box in the existing Test setup is replaced by a rectangular box having internal dimensions of 400 mm × 400 mm wide and 230 mm height, with a slot in the front face. Additional amendments for achieving smooth stress transfer, over entire displacement range, are explained. Typical pullout Test results using the modified Direct Shear Test set up are presented. Pullout friction coefficient values are observed to be within the range 0.55–1.69. In general, it is observed that the pullout behavior is sensitive to the normal stress and the type of geosynthetics in terms of its surface roughness.
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Pullout Tests Using Modified Direct Shear Test Setup for Measuring Soil–Geosynthetic Interaction Parameters
International Journal of Geosynthetics and Ground Engineering, 2016Co-Authors: V Prashanth, A. Murali Krishna, Sujit Kumar DashAbstract:Soil–geosynthetic interaction parameters and their determination play a vital role in the design of reinforced soil structures. Direct Shear Test and/or pullout Test are commonly used to determine the interaction parameters. Often, it is economically viable to obtain these parameters through existing Test setups that are conventionally used in geotechnical engineering. However, the existing Test setups need certain modifications, to facilitate the requirement for the specialized Tests. This paper introduces modifications to the large size (300 mm × 300 mm) Direct Shear Test setup for evaluating the soil–geosynthetic interaction parameters under pullout. The Shear box in the existing Test setup is replaced by a rectangular box having internal dimensions of 400 mm × 400 mm wide and 230 mm height, with a slot in the front face. Additional amendments for achieving smooth stress transfer, over entire displacement range, are explained. Typical pullout Test results using the modified Direct Shear Test set up are presented. Pullout friction coefficient values are observed to be within the range 0.55–1.69. In general, it is observed that the pullout behavior is sensitive to the normal stress and the type of geosynthetics in terms of its surface roughness.