摘要
传统滑坡稳定分析中,滑动面的位置和形状总是或多或少根据钻孔勘察和工程经验而定,特别是对可能存在多个潜在剪出口和滑动面的复杂滑坡,往往导致滑动面的错划和漏划,从而造成滑坡治理的失败。采用有限元强度折减法,针对一个复杂滑坡算例,通过依次约束剪出口的方式,准确搜索出低于设定安全系数的所有滑动面和剪出口,并克服传统方法确定复杂滑坡滑动面可能存在的错误或遗漏,为滑坡治理方案的制定提供参考依据。
In traditional landslide stability analysis, the shape and position of slip surface depend on drilling investigation and engineering experience to some extent. Especially, the complicated landslides are found with potential multi-shear outlets and multi-slip surfaces; and mistakes and leaks are usually encountered when estimating the slip surface, thus the results will lead to the failure of landslide treatment. The strength reduction FEM is an effective method to study landslides slip surface for it can automatically find out the accurate critical slip surfaces and corresponding safety factors~ and the numerical non-convergence occurs simultaneously through the parameters reduction of soils of landslides. Moreover, it can still find out the glide order of each slip surface. By restraining shear outlets successively, a landslide is studied to find out all slip surfaces and shear outlets accurately in which safety factors are lower than the ones calculated by strength reduction FEM. The proposed method overcomes the deficiencies of traditional methods in determining complicated landslide slip surfaces; and it can provide basis for the projects of landslide treatment.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第8期1544-1549,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(40318002)
关键词
边坡工程
滑动面
安全系数
滑坡稳定性
有限元强度折减法
极限状态
slope engineering
slip surfaces
safety factor
landslide stability
strength reduction FEM
critical state
