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.
出处
《山地学报》
CSCD
北大核心
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)~~
关键词
土坡滑移
粘塑性应变率
粘滞性
解析解
deformation of slope soil
viscoplastic strain rate
viscosity
analytical solution
