摘要
综合考虑边坡坡高、角度、岩土体黏聚力、摩擦角和容重等因素对边坡稳定性的影响,通过有限单元应力法建立数值模型,进行应力分析,最后计算得到边坡安全系数,这一方法将数值分析和极限平衡方法有机地融合在一起,达到优势互补的效果;然后基于灰色关联分析法对有限单元应力法得到的数据建立数学模型,对各影响因素与安全系数进行关联分析,最后得到各影响因素对边坡稳定性影响的敏感性。结果表明:影响边坡稳定性的因素敏感性依次为黏聚力、容重、摩擦角、边坡角度和坡高。利用敏感性分析结果,可对边坡加固位置提出设计改进,将有限的加固措施加于敏感性较高的位置,能够更有效地提高边坡的稳定性。
Slope stability is a complex system involving the interaction of many factors. Considering the in fluence of slope height, angle, rock and soil cohesion, friction angle and bulk density on slope stability, this paper establishes a numerical model by the finite element stress method, then conducts stress analysis, and finally caleulats the slope safety factor. This method combines the limit equilibrium method and numerical analysis. Then, based on the gray relational analysis method, we use the data from finite element stress method to establish a numerical model. After that, we analyzed relationships of each factor and safety factors, and finally determine the sensitivity of each factor. The results show that： the factors that affected the sensitivity of slope stability were cohesion, bulk density, friction angle, slope angle and slope height. The sensitivity analysis results can improve the design of slope reinforcement location. It can save cost and can more effectively improve the stability of slopes.
出处
《地质科技情报》
CAS
CSCD
北大核心
2014年第3期202-204,共3页
Geological Science and Technology Information
关键词
灰色关联分析
边坡
敏感性分析
有限单元应力法
grey relation analysis
slope
sensitivity analysis
the finite element stress method
