超大跨度隧道开挖方法与支护体系优化分析  

Optimization Analysis of Excavation Methods & Supporting Systems of Super-large Span Tunnel

作　　者：刘宝超 张兵兵 

机构地区：[1]大连市市政设计研究院有限责任公司,辽宁大连116000

出　　处：《中国市政工程》2014年第5期72-74,118,共3页China Municipal Engineering

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.

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 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]