摘要
采用数值方法,对深埋连拱隧道在Ⅱ、Ⅲ、Ⅳ级围岩条件下整体式直中墙、分离式直中墙的施工受力进行分析,得出了中墙的基本受力规律及中墙施工的关键工序和薄弱部位。结果表明,对于Ⅱ级围岩深埋连拱隧道,两种中墙结构只需构造配筋即可满足要求;而对于Ⅲ、Ⅳ级围岩深埋连拱隧道,则需根据内力配置钢筋。
Adopting numerical method, authors of the paper analyzed the behavior of the single intermediate wall and the separated intermediate walls of a deep multi - arch tunnel when excavated in the rocks of grade Ⅱ ,Ⅲ and Ⅳ respectively. As a result, they found out the crucial construction processes and the weak points for the intermediate walls. As indicated by the analyses, the two types of intermediate walls of a multi - arch tunnel should only be reinforced by construction requirements for rock grade Ⅱ, but should be reinforced according to internal forces for rocks grade Ⅲ and Ⅳ.
出处
《现代隧道技术》
EI
北大核心
2006年第3期1-5,11,共6页
Modern Tunnelling Technology
关键词
深埋连拱隧道
有限元
中墙
施工力学
Deep multi -arch tunnel
Finite element
Intermediate wall
Construction mechanics
