摘要
昭通至西昌段在建高速公路拟从研究区边坡前部通过,边坡稳定性是修建高速公路必须考虑的重要问题。经调查查明该边坡的地质环境特征,选取3处典型剖面进行稳定性分析。分析了粘聚力c、φ内摩擦角和边坡稳定性系数之间的相关性,通过室内实验、反演和类比综合分析确定了边坡抗剪强度参数。基于GEO-SLOPE软件采用Morgenstern-Price法建模模拟并计算该边坡在天然、暴雨和地震3种工况下的稳定性系数,并利用ABAQUS软件对边坡进行应变和位移分析。结果表明:粘聚力c与边坡稳定性系数相关性较低,内摩擦角φ与边坡稳定性系数间相关性显著;3-3´剖面在暴雨和地震工况下处于失稳状态,坡体前部在工程扰动下可能失稳发生滑动;GEO-SLOPE和ABAQUS软件模拟的滑动面位置基本相同,模拟结果可以为实际工程提供参考。
The highway under construction from Zhaotong to Xichang is planned to pass through the front of the slope in the study area.Slope stability is an important issue that must be considered in the construction of the highway.After investigation,the geological environment characteristics of the slope were found out,and three typical sections were selected for stability analysis.The correlation between the Cohesion and internal friction angle and the slope stability coefficient is analyzed,and the slope shear strength parameters are determined through laboratory experiments,inversion and analog comprehensive analysis.Based on GEO-SLOPE software,the Morgenstern-Price method is used to model and simulate and calculate the stability coefficient of the slope under three conditions of natural,heavy rain and earthquake.It also uses ABAQUS software to analyze the strain and displacement of the slope.The results show that the correlation between cohesion and slope stability coefficient is low,and the correlation between internal friction angle and slope stability coefficient is significant;Section 3-3'is in a state of instability under heavy rain and earthquake conditions,and the front part of the slope may lose stability and slide under engineering disturbance.The sliding surface positions simulated by GEO-SLOPE and ABAQUS software are basically the same,and the simulation results can provide references for actual projects.
作者
任涛
段鹏宇
袁颖
REN Tao;DUAN Peng-yu;YUAN Ying(Hebei GEO University,Shijiazhuang 050031,China;School for Hebei Ecological and Envieonmental Geology Research,Shijiazhuang 050031,China)
出处
《河北地质大学学报》
2021年第5期95-100,共6页
Journal of Hebei Geo University
基金
河北省自然科学基金项目(D2019403182)
河北地质大学第十七届学生科技基金科研项目(KAG202105)。
