【摘要】 分别对含筋层数为1、2、4层的尾矿细砂进行三轴压缩试验.2层以下加筋时,土工织物对尾矿砂的横向变形约束作用较小,尾细砂均表现为剪切破坏特征;在2到4层增强时,尾细砂表现为拉应力破坏特征;拉破坏条件下和剪切滑移破坏条件下,均发现加筋后的尾矿,内聚力随加筋层数非线性增大,而内摩擦角基本不变.定义了增强效果系数,层数与该系数呈非线性关系.轴向应变小于5%～8%时,尾矿砂处于弹性变形阶段,轴向应变大于8%时,出现弹塑性耦合变形.更多还原

【Abstract】 Tiaxial compression tests are made with different number of geotexile to the tailing fine sand.when 1 or 2 layers,the geotexile has a little restraint on the sand’s lateral deformation and the failure mode is shear failure.when 4 or more layers,the failure mode is tensile failure.Under the two failure modes,the existence of reinforced material can influence the cohesion force which is nonlinear increase with the layer’s number,but not the inner friction angle.It defined the coefficient of the enhanced action which has a nonlinear rise according to the layer’s number.When axial strain below 5%~8%,the sand is at the elastic distortion stage,but elasto-plasticity stage when more 8%.更多还原