摘要
为了精确确定碎石土滑坡的滑动面和计算滑坡的稳定性系数,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,采用大变形弹塑性有限元极限塑性应变分析法确定碎石土滑坡的滑动面,并根据极限状态下塑性应变值的大小确定滑面不同抗剪强度的取值段,提出全面考虑滑面上岩土体抗剪强度不同发挥程度的不平衡推力法,并通过实例分析表明该方法能更加精确地计算碎石土滑坡的稳定性系数和分析滑坡的稳定性,更加真实地反映滑坡所处的实际状态。
In order to determine the sliding surface of a debris landslide more accurately and calculate its stability coefficient, through the collection, arrangement and analysis of related data, the site investigation and exploration of engineering geology, indoor and outdoor physical mechanics test, the sliding surface of the debris landslide is determined by the method of limit plastic strain analysis of large deformation elastic-plastic FEM. Furthermore, the sections of different utilization degrees of shear strength are determined on the basis of plastic strain value under the limiting state of the landslide. This paper proposes the unbalanced-thrust method which comprehensively thinks over the different utilization degrees of shear strength of rock and soil on the sliding plane. The analysis of a concrete engineering example shows that this method may be very well used to analyze the stability of a debris landslide and calculate its stability coefficients, which can more really reflect the actual locating state of a debris landslide.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第5期492-497,共6页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家自然科学基金资助项目(40872179
40502026)
上海市重点学科建设基金资助项目(B308)
关键词
岩土力学计算
碎石土滑坡
大变形
弹塑性有限元
耦合分析
geo-technical mechanics computation
debris landslide
large deformation
elastic-plastic FEM
coupling analysis
