包兰铁路新增二线工程岩堆体边坡稳定性分析与地质选线研究  

Rock heap stability analysis and geological route selection study for the newly added second line project of Baolan railway

作　　者：亓源水 QI Yuanshui(China Railway Fifth Survey and Design Institute Group Co.,Ltd,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《地质装备》2025年第1期33-39,共7页Equipment for Geotechnical Engineering

基　　金：中国铁建重大专项(编号:2021-A02)。

摘　　要：根据包兰铁路增建二线工程进站端岩堆体的影响,采用Midas GTX NX有限元对岩堆体在地震工况和极端降雨工况下的稳定性进行模拟,从岩堆体坡面位移、剪应力、孔隙水压力等方面分析了岩堆体边坡的破坏过程,由计算结果得出两种工况下岩堆体边坡均发生失稳破坏。基于技术难度和工程投资等因素对4种线路方案进行比选,最终选择了改建既有包兰、太中银线引入黄羊湾站方案,绕避了岩堆体等重大不良地质的影响,从而得出最优方案,优化了工程地质条件,节省了工程投资,减小了技术难度。According to the influence of rock heap at the entrance end of Baolan railway second line project,Midas GTX NX finite element method is used to simulate the stability of rock heap under seismic conditions and extreme rainfall conditions.The failure process of rock heap slope is analyzed from the aspects of displacement,shear stress and pore water pressure.From the calculation results,it can be concluded that the rock heap slope failure occurs under both conditions.Based on technical difficulty,engineering investment and other factors,four route schemes were compared,and the scheme of rebuilding the existing Baolan and Taizhongying lines to Huangyangwan station was finally selected to avoid the influence of major adverse geology such as rock heaps,so as to obtain the optimal scheme,optimize the engineering geological conditions,save the engineering investment and reduce the technical difficulty.

关 键 词：岩堆体 稳定性 变形 地质选线 不良地质 

分 类 号：P642[天文地球—工程地质学]