无限长土坡滑移变形模拟  

Simulation of the Deformation of Infinite Soil Slope

作　　者：谢州[1] 周成[1] 刘焦[1] 曾子[1] 

机构地区：[1]四川大学水利水电工程学院,水力学与山区河流保护国家重点实验室,四川成都610065

出　　处：《山地学报》2012年第1期65-69,共5页Mountain Research

基　　金：国家自然科学基金重点项目(90815024)~~

摘　　要：从建立土体应力平衡微分方程入手,在平面应变的假定下求解均质无限长土坡的应力平衡方程。通过拟定坡土的滑移速度和粘塑性应变率的关系式,以剑桥模型为依托,得出滑移变形速率的显式表达式,由此推出土坡滑动位移的计算式。因为模型计算值与实测值无论变形趋势还是大小都有不少误差,所以经修正粘滞性参数来改进模型的模拟精度。最后通过一个算例,将现场实测滑移数据和模型计算值进行比较,分析表明二者较为一致。Element stress is derived from the stress equilibrium differential equations under the plane strain condi- tions. Viseoplasticity model is used between velocity and the viscoplastic strain of the slope soil. Then Cam - Clay model is used to derive the explicit expressions of the deformation rate with the depth of slope soil. The slope de- formation is calculated. Simulation accuracy is improved by given in comparison with the field measured data and good modifying the viscosity. Finally, numerical example is agreement is achieved.

关 键 词：土坡滑移 粘塑性应变率 粘滞性 解析解 

分 类 号：P642[天文地球—工程地质学] TU4[天文地球—地质矿产勘探]