偏压连拱隧道施工技术数值模拟研究  

NUMERICAL SIMULATION STUDY ON CONSTRUCTION TECHNOLOGY OF BIAS MULTI-ARCH TUNNEL

作　　者：毛铭琨 刘洋 李清馨 王林 宁博 MAO Mingkun;LIU Yang;LI Qingxin;WANG Lin;NING Bo(Shaanxi Road and Bridge Group Co.,Ltd.,Xi'an 710000,China;College of Architectural Engineering,Xi'an University of Technology,Xi'an 710021,China)

机构地区：[1]陕西路桥集团有限公司,西安710000 [2]西安工业大学建筑工程学院,西安710021

出　　处：《低温建筑技术》2025年第2期68-71,共4页Low Temperature Architecture Technology

基　　金：陕西省教育厅服务地方专项计划项目(22JC040)。

摘　　要：针对偏压连拱隧道施工时受力不均,易造成初期支护开裂、脱落等工程事故,文中以头桥隧道为依托,通过有限元数值模拟和现场监测相结合的方法,分析了偏压连拱隧道中导洞-台阶法、中导洞-双侧壁法及不同正洞开挖顺序对拱顶下沉、围岩及初期支护应力的影响。研究结果表明,头桥隧道采用中导洞-双侧壁法,先将右洞(埋深较浅的正洞)贯通后再开挖左洞(埋深较深的正洞)的施工方法围岩变形最小,结构受力最优,施工安全可靠。In view of the uneven stress during the construction of the bias double-arch tunnel,it is easy to cause engineering accidents such as cracking and shedding of the initial support.Based on the touqiao tunnel,through the combination of finite element numerical simulation and on-site monitoring,the bias double-arch tunnel is analyzed.The influence of the pilot tunnel-step method,the pilot tunnel-double side wall method,and the different excavation sequence of the main tunnel on the vault subsidence,surrounding rock,and initial support stress.The results show that the head bridge tunnel adopts the middle guide hole-double side wall method.The construction method of first penetrating the right hole(the main hole with shallow buried depth)and then excavating the left hole(the main hole with deep buried depth)has the smallest surrounding rock deformation,the optimal structural stress,and the safe and reliable construction.

关 键 词：偏压连拱隧道 围岩位移 中导洞-双侧壁法 

分 类 号：TU921[建筑科学—建筑设计及理论]