不同含水量土工格栅加筋粘土三轴试验研究  

Triaxial Test Research of Geogrid-reinforced Clay in Different Containing Water Rates

作　　者：刘剑旗[1] 王宁[1] 赵易[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621002

出　　处：《建筑科学》2009年第5期51-54,共4页Building Science

基　　金：四川省自然科学基金资助项目(编号:2005A136)

摘　　要：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,将加筋粘土体在三轴受压条件下的总体抗剪承载力分为加筋土体发生侧向变形前的承载力和与土工格栅密切相关的土体发生侧向变形后的承载力两部分进行研究。通过不同含水量下加筋粘土的三轴试验及其所得相关数据,提出了利用加筋土体发生侧向变形后的抗剪承载力与极限抗剪承载力的比值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,当粘性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, and 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 rates, P2, the ratio of the shear capacity after lateral deformation to the limit shear capacity is an important indicator which can be used to evaluate the reinforcing effect. The test results indicate that the reinforcing effect is best when the clay is in state of the optimum moisture content.

关 键 词：土工格栅 加筋粘土 静止侧压力系数 

分 类 号：TU411.7[建筑科学—岩土工程]