摘要
徐州地铁2号线中心医院站—淮塔东路站区间岩溶较发育、规律性差、易富水,隧道正线与联络线接岔段横通道施工跨度大以及多洞室同时施工存在施工安全隐患。文章运用ABAQUS软件设置4种不同进洞顺序工况,建立正线与联络线接岔段洞室群数值模型,通过分析横通道土体、初期支护的应力分布情况,得到了最优的区间隧道施工进洞方案,并提出了洞室群总体施工方案和具体施工措施。工程实践表明:采用提出的岩溶地层地铁正线与联络线接岔段洞室群暗挖施工技术方案,能有效控制地表沉降,保证周边建筑物和地下管线的安全。
As for the running tunnel section from Central hospital station to Huaita Donglu station on Xuzhou metro line 2,the karst located in the section is relatively developed with poor regularity and rich water.And the construction is subjected to risk because of the large span of cross passage and simultaneous construction of tunnel group.Given this,a numerical model of tunnel group at the junction of main line and connection line is established by using ABAQUS software and considering four kinds of construction sequences.The optimal construction sequence scheme for running tunnel is obtained by analyzing the stress distribution of the soil mass and primary support of cross passage,as well as the overall construction scheme and specific construction measures for the tunnel group are proposed.The application practice results show that ground surface settlement can be effectively controlled by proposed mined construction scheme for tunnel group at the junction of metro main line and connection line in karst stratum,guaranteeing the safety of surrounding buildings and underground pipe lines.
作者
田瑞忠
TIAN Ruizhong(China Railway 12th Bureau Group Co.,Ltd.,Taiyuan 221000)
出处
《现代隧道技术》
EI
CSCD
北大核心
2020年第6期193-199,共7页
Modern Tunnelling Technology
关键词
岩溶地层
地铁
正线
联络线
横通道
洞室群
数值计算
暗挖施工技术
Karst stratum
Metro
Main line
Connection line
Cross passage
Tunnel group
Numerical calculation
Mined construction technology
