摘要
某城市道路小净距隧道平行上穿既有地铁隧道,采用上下短台阶法施工。运用有限元软件MIDAS/GTS进行数值模拟,分析新建隧道施工过程中对既有隧道的变形及内力的影响,并与现场监控量测值对比,评价既有隧道的安全性,计算及监测结果表明,该新建隧道采用上下短台阶法开挖施工是安全可行的。
A city road of small spacing parallel tunnel put on existing subway tunnel, short step construction method is used. In this paper, the use of finite element software MIDAS / GTS numerical simulation, analyse the influence on existing tunnel deformation and internal force in the new tunnel construction process, and in monitoring measurement value contrast, safety evaluation of existing tunnel, calculation and monitoring results show that the new tunnel by under short step method for excavation is safe and feasible.
出处
《北方交通》
2016年第10期56-59,共4页
Northern Communications
关键词
新建隧道
既有隧道
小净距
数值模拟
台阶法
New tunnel
Existing tunnel
Small spacing tunnel
Numerical simulation
Step method
