基于折减法分析剪胀角对边坡稳定性的影响  

Analysis of the effect of dilatancy angle on slope stability based on reduction method

作　　者：周润健 孙超[1] 郭浩天[1] ZHOU Run-jian;SUN Chao;GUO Hao-tian(School of geometrics and prospecting,Jilin Jianzhu university,Changchun 130118,China)

机构地区：[1]吉林建筑大学测绘与勘查工程学院,长春130118

出　　处：《吉林建筑大学学报》2023年第3期27-32,42,共7页Journal of Jilin Jianzhu University

基　　金：吉林省教育厅科学技术研究项目(2014-232).

摘　　要：为探究剪胀角对边坡稳定性的影响,基于非关联流动法则并引入等效参数,利用AbaqusCAE有限元软件采用强度折减法对不同剪胀角条件下土质边坡的稳定性进行数值模拟分析研究.结果表明,采用等效参数分析剪胀角是可行的.剪胀角的存在能在一定程度上提高边坡稳定性,当剪胀角介于0°~25°时,剪胀角越大边坡越稳定.用强度折减法分析边坡稳定性时,剪胀角随着强度的折减具有先增大后减小的规律.考虑剪胀角折减的安全系数在理论上更能反映边坡的真实安全状况,为研究剪胀角在边坡稳定性分析中的影响提供了一种新思路.In order to explore the influence of dilatancy angle on slope stability,AbaqusCAE finite element software was used to simulate the stability of soil slope under different dilatancy angles by strength reduction method based on the non-associated flow law and equivalent parameters.The results show that it is feasible to use equivalent parameters to analyze dilatancy angle.The existence of dilatancy angle can improve slope stability to a certain extent.When the dilatancy angle is between 0°and 25°,the larger the dilatancy angle is,the more stable the slope will be.When strength reduction method is used to analyze slope stability,dilatancy angle increases first and then decreases with strength reduction.The safety factor considering dilatancy angle reduction can better reflect the real safety condition of slope theoretically,which provides a new idea for studying the influence of dilatancy angle on slope stability analysis.

关 键 词：剪胀角 边坡稳定性 非关联流动法则 强度折减法 安全系数 

分 类 号：TU431[建筑科学—岩土工程]