复杂工况下盾构侧穿既有隧道变形模拟研究  

SIMULATION STUDY ON THE DEFORMATION OF SHIELD TUNNELS UNDER COMPLEX WORKING CONDITIONS

作　　者：薛玉山 王旭春[1] 赵安康 刘绪壮 王庆壮 XUE Yushan;WANG Xuchun;ZHAO Ankang;LIU Xuzhuang;WANG Qingzhuang(School of Civil Engineering,Qingdao University of Technology,Shandong Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《低温建筑技术》2025年第1期92-95,104,共5页Low Temperature Architecture Technology

基　　金：国家重点研发计划项目(2023YFC2907600)。

摘　　要：文中以青岛地铁新建8号线支线盾构隧道,连续侧穿既有明挖、暗挖隧道工程为例,对既有隧道结构变形进行研究。通过FLAC 3D数值模拟,分析并得到了侧穿隧道施工中既有运营隧道竖向及侧向位移的变化规律。研究结果表明,既有明挖隧道结构最终竖向位移量约为暗挖隧道的两倍,位移速率均为先增大后减小,围岩强度越低竖向变形量越大,且远大于水平位移量。既有明挖隧道在软、硬岩地层中呈现出不同方向的水平位移。研究可为类似复杂工程施工提供参考。Taking the shield tunnel of the new branch of Qingdao Metro Line 8 as the case,which continuously pass⁃es laterally through existing cut-and-cover and mined tunnels,this study investigates the deformation of existing tunnel structures.Using FLAC 3D numerical simulation,the study analyzes and identifies the patterns of vertical and lateral displacement in existing operational tunnels during the lateral passage construction.The results indicate that the final vertical displacement of the cut-and-cover tunnel structure is approximately twice that of the mined tunnel.The displacement rate initially increases and then decreases,with lower surrounding rock strength leading to greater vertical deformation,significantly exceeding horizontal displacement.Additionally,the cut-and-cover tun⁃nel exhibits horizontal displacements in different directions depending on whether it is in soft or hard rock strata.These findings provide a valuable reference for similar complex engineering projects.

关 键 词：盾构隧道 侧穿既有隧道 抗竖向变形 

分 类 号：TU921[建筑科学—建筑设计及理论]