考虑结构性的复杂黄土边坡稳定性分析  

The Analysis of Loess Slope Stability with Considering the Structure

作　　者：罗爱忠 方娟 陈昌禄 朱世琰 刘春艳 LUO Ai-zhong;FANG Juan;CHEN Chang-lu;ZHU Shi-yan;LIU Chun-yan(School of Civil Engineering and Architecture,Guizhou University of Engineering Science;Dean Office,Guizhou University of Engineering Science;Bijie Karst Mountain Geological Disaster Control Key Laboratory,Bijie,Guizhou551700,China)

机构地区：[1]贵州工程应用技术学院土木建筑工程学院 [2]贵州工程应用技术学院教务处 [3]毕节市岩溶山地地质灾害控制重点实验室,贵州毕节551700

出　　处：《贵州工程应用技术学院学报》2023年第3期43-49,共7页Journal of Guizhou University Of Engineering Science

基　　金：贵州省高层次创新人才计划项目“贵州红黏土的工程特性及灾变控制”,项目编号:毕科人才合2021(07);毕节市科技计划项目“贵州红黏土边坡孕灾机理及稳定性研究”,项目编号:毕科联合(2023)30号;教育部新工科建设项目“新工科建设背景下西部地方高校土建类专业创新创业教育类课程体系建设”,项目编号:E-CXCYYR202000945。

摘　　要：黄土的结构性是一种结构势能在时间和空间上的综合力学效应,这种力学效应在微观上通过土体颗粒间的固化联结和空间排列来表征,结构性参数可定量化描述土体的结构性,引入考虑结构性参数的摩尔-库伦抗剪准则,以反映土体结构性对抗剪强度参数的影响。以黄土地区某一在地震烈度为9度作用下的黄土边坡为例,基于黄土边坡动力稳定性分析原理,提出了考虑结构性的拟静力分析法,对黄土边坡进行了动力稳定性分析,分析了动力作用下黄土边坡位移、应变、滑面特征等,验证结构性参数作为边坡稳定性分析判据的可行性和合理性,且这一方法能定量地确定边坡滑动面的位置及所对应的安全结构性参数;分析方法及结果对指导黄土地区工程实践具有重要意义。The structure of loess is a comprehensive mechanical effect of structural potential energy in time and space.This mechanical effect is characterized by the solidified connection and spatial arrangement of soil particles.The structural parameters can quantitatively describe the structure of soil.The Mohr-Coulomb shear criterion considering structural parameters is introduced to reflect the influence of soil structure on shear strength parameters.In this paper,a loess slope under the action of seismic intensity of 9 degrees in loess area is taken as an example.Based on the principle of dynamic stability analysis of loess slope,a pseudo-static analysis method considering structure is proposed.The dynamic stability analysis of loess slope is carried out,and the displacement,strain and sliding surface characteristics of loess slope under dynamic action are analyzed.The feasibility and rationality of structural parameters as slope stability analysis criteria are verified,and this method can quantitatively determine the position of slope sliding surface and the corresponding safety structural parameters.The analysis method and results are of great significance to guide the engineering practice in loess area.

关 键 词：黄土边坡 结构性参数 地震稳定性 

分 类 号：P642[天文地球—工程地质学]