碎石土古滑坡弹塑性接触有限元稳定性分析  

Stability analysis of an ancient debris landslide by elastic-plastic contact FEM

作　　者：许建聪[1] 尚岳全[2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]浙江大学建筑工程学院,杭州310027

出　　处：《成都理工大学学报（自然科学版）》2008年第1期74-80,共7页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金资助项目(40372118)

摘　　要：为了准确评价碎石土古滑坡的稳定性,通过资料搜集整理和分析、现场工程地质调查与勘探和室内外的物理力学试验,采用三维大变形弹塑性接触有限元算法,结合复活碎石土古滑坡工程实例,提出利用三维计算结果计算二维剖面稳定性系数的方法,分析了滑坡的稳定性。结果表明,采用三维大变形弹塑性接触有限元算法分析滑坡稳定性可以考虑滑坡体的空间效应,使计算结果更加符合实际。新方法可以更准确分析碎石土滑坡的稳定性和获得该类型滑坡所处的实际状态,为滑坡治理提供准确的科学信息。In order to accurately evaluate the stability of an ancient revived debris landslide, through the collection, arrangement and analysis of the related datum, the site investigation and exploration of engineering geology, indoor and outdoor physical mechanics test, adopting three dimensional large deformation contact elastic-plastic FEM algorithm, combined with the engineering concrete example of the revived ancient debris landslide, this paper presents a method to compute the two dimensional section stability coefficient of this type of landslide by making full use of the computes results by the three dimensional large deformation contact elastic-plastic FEM algorithm and analyzes this landslide stability. The results show that to adopt the three dimensional large deformation contact elastic- plastic FEM algorithm to analyze the landslide stability may think over the spatial effect .of the landslide mass. This would make the computed results more accord with the reality. Furthermore, to adopt this new method can more accurately analyze the stability of this revived ancient debris landslide, and achieve the actual locating state of this type of landslide to provide the accurate scientific information for treating the landslide.

关 键 词：岩土力学计算 碎石土古滑坡 大变形 弹塑性接触算法 稳定性分析 

分 类 号：TU457[建筑科学—岩土工程]