大断面隧道施工力学响应数值模拟研究  

The numerical simulation of constructional mechanical responses of highway tunnel with large cross section

作　　者：刘春[1] 易俊[1] 姜德义 郑航太[1] 

机构地区：[1]重庆科技学院安全工程学院,重庆400042 [2]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400044

出　　处：《中国矿业》2008年第2期90-93,共4页China Mining Magazine

基　　金：国家自然科学基金重点项目(No.50334060)资助课题

摘　　要：结合重庆市在建大坪隧道的工程地质和设计情况,对隧道洞身Ⅲ类围岩地段采用不同施工方法锚喷初支开挖时的力学动态响应进行了数值模拟,分析了围岩应力场、应变场、位移场,以及锚喷时喷层、锚杆的力学性态,通过综合比较得出,台阶三分部法开挖是适合大坪隧道Ⅲ类围岩段合理的施工方法。According to the design and geological condition of Da-ping tunnel, numerical methods used to analyze the mechanical responses of tunnel with large cross section on surrounding rock condition of class Ⅲ. Then stress field , meet an emergency field , displacement field and mechanical responses of shotcrete and bolt support of different construction methods are studied, and base on compare synthetically step three branch excavating method is the rational construction of Da-ping tunnel surrounding rock condition of class Ⅲ.

关 键 词：大断面隧道 施工方法 锚喷 数值模拟 

分 类 号：U415[交通运输工程—道路与铁道工程]