土工格栅加筋黏土抗剪强度三轴试验

Triaxial Test Research of Geogrid-reinforced Clay

通过土体三轴受压条件下的无侧向静止土压力系数和摩尔-库仑定理,将加筋黏土体在三轴受压条件下的总体抗剪强度分为加筋土体发生侧向变形前的强度和与土工格栅密切相关的土体发生侧向变形后的强度两部分进行研究。在不同含水量下加筋黏土的三轴试验及其所得相关数据分析的基础上,提出利用加筋土体发生侧向变形后的抗剪强度与极限抗剪强度的比值p2随加筋层数的变化情况作为评价加筋效果的重要指标。试验结果表明,当黏土在最优含水量状态下时,其加筋效果最为显著。

Through the non-lateral static earth pressure coefficient and the Coulomb theorem in the condition of triaxial compression,the whole carrying capacity of the geogrid-reinforced clay can be divided into two parts,the one represents the carrying capacity before the lateral deformation,the other represents the carrying capacity after the lateral deformation which is closely related with the geogrid.Through the triaxial test of the reinforced clay in different water rate,p2,the ratio of the shear capacity after lateral deformation and the limit shear capacity is an important indicator which can be use to evaluate the reinforcing effect.The test results indicate that the optimal reinforcing effect is achieved when the clay is state on the optimal moisture content.