太原地铁1号线工程地质条件及主要地质问题研究

结合太原地铁1号线地铁特有的地层岩性、地质构造、岩土特征、水文地质,分析与地铁隧道、车站建设相关的工程地质条件、水文地质条件特征。研究太原地铁1号线的主要工程地质问题,即交城活动断裂、地面沉降、地震液化、湿陷性土。在此基础上,对地铁车站基坑以及区间隧道开挖可能面临的工程地质问题进行分析和研究,得出结论:交城活动断裂带内不宜设置地下车站,地下站基坑开挖易产生流沙、基坑边坡失稳,地面沉降对工程影响不大。

Study of Engineering Geological Conditions and Major Geological Problems in Taiyuan Metro Line-1

In perspective of the particular stratum,geological structure,geotechnical characteristics and hydrogeology in Taiyuan metro line-1,this paper analyzes the characteristics of engineering geological and hydro-geological conditions related to the construction of metro tunnel and station project. Primary geological problems in Taiyuan metro line-1 are analyzed,such as the Jiaocheng active fault,ground sedimentation,seismic deliquescence and collapsibility of soil. On the basis of the above,the major engineering geological problems involved in Taiyuan metro line station base pit and tunnel excavation are studied and conclusions are reached: underground station should not be set in Jiaocheng active fault,quicksand and loss of stabilization are encountered in the course of excavation,and ground sedimentation has little impact on metro engineering.