期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
卷号：2
期号：10
页码：5290
出版社：S&S Publications
摘要：Reinforced soil is a composite material which is formed by the association of frictional soil and tensionresisting elements in the form of sheets, strips, nets, or mats of metal, synthetic fabrics or fiber reinforced plastics andarranged in the soil mass in such a way as to reduce or suppress the tensile strain which might develop under gravityand boundary forces. It is well-known facts that most granular soils are strong in compression and shear but weak intension. The performance of such soils can be substantially improved by introducing reinforcing elements in thedirection of tensile strains in the same way as in reinforced concrete. Keeping this in view the present study was takenup. In this study triaxial compression tests were conducted on a medium dense granular soil (RD = 40 %) reinforcedwith synthetic geogrid sheet. The geogrid sheets equal to plan dimension of split mould were placed within the triaxialtest samples in different combinations such as 3 layers, 4 layers and 5 layers at equal vertical spacing. The stiffnessmodulus (σd/ϵ) and shear strength parameters (c and ϕ) of reinforced sand corresponding to each combination ofgeogrid sheet were determined in the laboratory. Tests results indicate that the stiffness modulus and the shear strengthparameters of soil increase on the inclusion of geogrid sheet. It was also observed that on increasing the number ofgeogrid sheet these strength parameters further improve and the improvement is substantial corresponding to 5 layers ofgeogrid sheet.Thus there is a significant improvement in stiffness modulus and shear strength parameters of reinforced soil due togeogrid sheet and the load carrying capacity of reinforced soil will be improved and immediate settlement will bereduced.
