摘要
对西安咸阳国际机场污水排放口潜在滑坡的工程地质勘察结果表明,该滑坡处于极限平衡状态。采用B ish-op法参数反演和直快剪试验结果,分别用二维、三维极限平衡法和二维、三维有限元法,对该滑坡进行稳定性计算。结果表明:有限元法(二维、三维)的计算结果偏大,二维极限平衡法的计算结果最小;极限平衡法(二维、三维)与二维有限元法宜选取试验结果的大值平均值,三维有限元法则取试验结果的小值平均值较为合理。最后,根据三维有限元法的计算结果,提出了削坡压脚的防护措施。
The engineering geological investigation of potential landslide at sewage outlet of Xi′an Xianyang International Airport shows that the stability of slopes has basically reached the limit equilibrium state.The safety factors of the landslide stability was calculated respectively by two-dimensional and three-dimensional limit equilibrium methods and two-dimensional or three-dimensional finite element method with parameters inversion of two-dimensional limit equilibrium Bishop method and statistical parameters of quick shear test.The results show that the factors of safety from finite element method are on the high side,and that of two-dimensional limit equilibrium method is the smallest.The two-dimensional and three-dimensional limit equilibrium methods and two-dimensional finite element method should choose the average of the large values,while the three-dimensional finite element method should select the average of the small values.Finally,the prevention measures of cutting slope and pressing foot are presented on the basis of three-dimensional finite element simulation.
出处
《防灾减灾工程学报》
CSCD
2011年第2期191-195,共5页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金重点项目(40972182和40772181)资助
关键词
滑坡
极限平衡法
有限元法
参数选取
landslide
limit equilibrium method
finite element method
choice of parameters
