摘要
以大连市南部滨海大道东端桥隧工程超大跨度隧道为工程背景,采用MIDAS-GTS有限元程序对超大跨度隧道的施工过程进行二维数值模拟,对比分析采用不同开挖方法、不同支护方式情况下围岩位移场、二次应力场的变化规律以及围岩塑性区分布特征。同时结合工程施工过程中遇到的实际问题,通过优化比选,提出适合工程实际的最佳开挖及支护方案。
Based on super-large span tunnel of east section bridge & tunnel project of Binhai Ave. in the south area of Dalian,the construction process of this tunnel is made a 2D numerical simulation by means of MIDAS-GTS finite element program on analyzing surrounding rock displacement field,change rule of secondary stress field and distribution characteristics of surrounding rock plastic zone through comparing & adopting different excavation methods and supporting patterns. Combined with the practical problems of this project,the best scheme of excavation & supporting is proposed through the optimization and comparison.
出处
《中国市政工程》
2014年第5期72-74,118,共3页
China Municipal Engineering
关键词
超大跨度隧道
开挖方法
支护方式
位移场
二次应力场
super-large span tunnel
excavation method
support pattern
displacement field
secondary stress field
