基于地质模型快速构建的边坡三维稳定性分析  

Three-Dimensional Slope Stability Analysis Based on Rapid Construction of Geological Model

作　　者：唐江涛 邓兆俊 覃羡安 易琦 TANG Jiangtao;DENG Zhaojun;QIN Xian'an;YI Qi(Power China Kunming Engineering Corporation Limited,Kunming,Yunnan 650000)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南昆明650000

出　　处：《地质与勘探》2021年第1期175-182,共8页Geology and Exploration

摘　　要：目前边坡稳定性分析多以二维剖面为主,随着各种数值分析软件的应用,边坡的三维稳定性分析技术越来越成熟,但是对于三维边坡的地质模型快速构建的方法不多,且建模精度难以得到保证。本文借助Geobim软件建立工程区的三维地质模型,提出借助surfer、Ansys等软件快速建立flac3d能够识别的类型文件的方法,此方法能够大大简化建模过程,提高建模精度。根据工程区的主要工程地质问题,对工程区的三维地质模型进行概化,结合相关实例对其进行三维地质建模,并借助flac3d软件计算不同工况下边坡的稳定性情况。根据计算结果可知,在暴雨工况下,边坡的稳定性降低,填方工况下,边坡的侧向位移变大,但是其稳定性相对较好,边坡的主要破坏模式为沿着填筑体及边坡的浅表层全、强风化层发生剪切破坏。At present,the slope stability analysis is mostly based on two-dimensional profiles.With the application of various numerical analysis software,three-dimensional slope stability analysis technology is becoming more and more mature,but few methods are available for the rapid construction of the three-dimensional slope geological model and the modeling accuracy is difficult to be guaranteed.This paper uses the Geobim software to establish a 3D geological model of an engineering area,and then proposes a method to quickly establish the type file which flac3d can recognize by means of surfer and Ansys software.This method can greatly simplify the modeling process and improve the modeling accuracy.According to the main geotechnical problems of the engineering area,a 3D geological model of the area is constructed,and then the stability of the slope under different working conditions is calculated using the flac3d software.Calculation results show that under the heavy rain conditions,the stability of the slope is reduced.Under the filling condition,the lateral displacement of the slope becomes larger,but its stability is relatively good.The main failure mode of the slope is shear failure along the superficial or shallow weathered layer of the filled body and the slope.

关 键 词：Geobim 三维地质建模 FLAC3D 边坡稳定性 

分 类 号：P512.2[天文地球—地质学]