土工布加筋粗粒土强度变形特性三轴试验研究OACHSSCD

This study conducted medium conventional triaxial consolidated-drained shear tests on coarse-grained soil reinforced with geotextile and plain coarse-grained soil to investigate their differences in deformation and strength characteristics.The results show that there is little difference between the linear shear strength index φ of reinforced coarse-grained soil and the corresponding value of plain coarse-grained soil.But the cohesion c increases significantly,and the strength reinforcement effectiveness coefficients R under various confining pressures all exceed 1.The shear dilatancy of coarse-grained soil significantly decreases after reinforcement,and the reinforced material effectively limits the lateral deformation of the soil mass.There is a good power function relationship between the failure shear dilatancy rate df and the confining pressure σ3 of both reinforced coarse-grained soil and plain coarse-grained soil.After reinforcement,the initial elastic modulus Ei and the secant bulk modulus K1 of coarse-grained soil are both significantly higher than those of plain coarse-grained soil,and there is a good linear relationship between Ei and σ3 and a good power function relationship between K1 and σ3.