炭质泥岩软弱夹层岩质边坡稳定性影响因素分析  

Analysis of influencing factors of rock slope stability in weak interlayer of carbonaceous mudstone

作　　者：刘新喜[1] 戴毅[1] 张平[1] 侯勇[1] 江佳[1] Liu Xinxi;Dai Yi;Zhang Ping;Hou Yong;Jiang Jia(School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha 410004,China)

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410004

出　　处：《湖南文理学院学报（自然科学版）》2017年第1期65-69,73,共6页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：国家自然科学基金(51378082;51674041)

摘　　要：为探究软弱夹层对岩质边坡稳定性的影响规律,采用自编的强度折减程序对多种工况下单因素变化的边坡稳定性进行了数值计算,并通过极差分析法设置正交试验对边坡稳定性多因素敏感性展开了分析。结果表明:软弱夹层空间位置分布和抗剪强度指标对边坡稳定性影响程度依次为软弱夹层的倾角、内摩擦角、黏聚力、厚度;当软弱夹层的倾角在25°~60°范围内变化时,边坡的安全系数变化曲线大致呈开口向上的抛物线,抛物线顶点位于软弱夹层45°倾角处,此时边坡的稳定性最差,在实际工程中应特别注意此类软弱夹层边坡的失稳问题。In order to investigate the influence of weak interlayer on the stability of rock slope,the self-madeintensity reduction program is used to numerically calculate the slope stability of single factor change under variousworking conditions.Additionally,the sensitivity of multi-factors to slope stability is analyzed by the method ofrange analysis.The results show that the spatial distribution of the weak intercalated layer and the shear strengthindex have the influence on the slope stability in the order of inclination angle,internal friction angle,cohesion andthickness.When the inclination of the weak interlayer is in the range from25°to60°,the slope of the safety factorof the slope is roughly upward parabola,and the parabolic apex is located at45°of the weak interlayer.In this case,the stability of the slope is the worst,and the instability of such weak interlayer slope should be paid specialattention in practical engineering.

关 键 词：软弱夹层 边坡稳定性 敏感性分析 

分 类 号：U416.14[交通运输工程—道路与铁道工程]