盾构下穿暗挖初支隧道数值模拟分析  

Numerical Simulation Analysis of Initial Branch Tunnel Under the Shield Tunnel and Undergroud Excavation

作　　者：张宝柱 ZHANG Bao-zhu(City Railway Engineering Co.,Ltd.China Railway 11th Bureau Group,Wuhan 430074,China)

机构地区：[1]中铁十一局集团城市轨道工程有限公司,武汉430074

出　　处：《价值工程》2025年第13期57-59,共3页Value Engineering

摘　　要：随着城市地铁大力发展,隧道施工中会遇到各种近接建构筑物问题,给现场安全顺利推进带来了一定的挑战。本文以某隧道为工程实例,基于有限元软件,对实际下穿工程进行了数值模拟,通过建立模型,详细分析了盾构隧道近距离下穿暗挖隧道时的地表沉降规律、上部隧道仰拱位移和拱腰收敛规律,为制定盾构安全顺利通过的措施提供了针对性的依据,可供类似工程参考。With the vigorous development of urban subways,various problems with proximity structures will be encountered during tunnel construction,which has brought certain challenges to the safe and smooth progress of the site.This paper uses a certain tunnel as an engineering example and uses finite element software to simulate the actual underpass project.Through the supervision model,the surface settlement rules of the shield tunnel when the underpass tunnel is penetrated from a close distance and the upper tunnel is arched.The displacement and arch waist convergence laws provide targeted basis for formulating measures for safe and smooth passage of shield structures,and can be used for reference in similar projects.

关 键 词：盾构隧道 地表沉降 收敛规律 近接隧道 数值模型 模拟分析 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]