柔性防护条件下高陡岩质边坡破坏过程的大变形有限元分析  

Large deformation fem analysis of high steep rock slope stability under flexible protection

作　　者：乔金丽[1] 李文秀[2] 刘波[1] 田稳苓[1] 

机构地区：[1]河北工业大学土木工程学院,天津300132 [2]河北大学岩土工程岩土所,河北保定071002

出　　处：《河北农业大学学报》2009年第4期119-123,共5页Journal of Hebei Agricultural University

基　　金：河北省科技攻关计划项目(05213706);河北省教育厅科研项目(2004308)

摘　　要：针对柔性防护系统条件下高陡岩质边坡的稳定性分析,利用弹塑性大变形理论,引入计算大变形问题更新的拉格朗日方法,考虑了具有断层的高陡岩质边坡的材料非线性和几何非线性,并利用强度折减法对边坡的安全系数进行计算分析。结果表明:考虑大变形理论下的柔性防护系统可更有效地提高边坡安全系数,在技术上和经济上都具有一定的优越性。According to the problem of slope stability under flexible protection for the high steep rock slope stability, the updated Lagrangian method of elasto-plastic large deformation FEM is introduced and not only the nonlinearity of rock material but also the geometric nonlinearity in the process of failure stability is considered. And during calculation, the strength reduction coefficient is utilized to calculate the safety factor of the slope. The numerical analysis results show that the proposed flexible protection system considering large deformation is valid and applicable to the high steep rock slope engineering.

关 键 词：边坡稳定性 柔性防护系统 大变形分析 安全系数 更新的拉格朗日法 

分 类 号：P642[天文地球—工程地质学]