地铁叠落隧道群洞施工扰动效应分析及控制案例研究  

Analysis of construction disturbance effects and control case study of metro stacked tunnel group cavities tunneling

作　　者：姚三瑞 王炜 姚爱军[1] YAO Sanrui;WANG Wei;YAO Aijun(Department of Urban Construction,Beijing Institute of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《现代城市轨道交通》2025年第4期32-39,共8页Modern Urban Transit

摘　　要：针对苏州地铁8号线小径距叠落临近既有地铁3号线隧道的复杂工况,采用有限元数值模拟和现场监测相结合的方法,系统分析群洞型地铁叠落隧道施工对既有隧道及周边地层的扰动效应。研究结果表明,8号线施工引起的地表沉降最大值达13.73 mm,且沉降曲线呈V型叠加;既有3号线隧道受扰动较小,变形控制在1 mm以内;8号线右线上穿左线过程中,左线衬砌变形显著,拱顶和拱底变形分别达到-13.16 mm和-12.99 mm。针对上述扰动,提出上下层隧道夹层注浆加固和隧道布设支撑台车的控制措施,可有效减小衬砌变形和地表沉降。相关研究成果可为类似群洞型叠落隧道的设计与施工提供参考和借鉴。In response to the complex engineering conditions of Suzhou metro line 8 with a small diameter and stacked proximity to the existing line 3 tunnel,a method combining finite element numerical simulation and on-site monitoring is adopted to systematically analyze the disturbance effects of the construction of a group cavities-type metro stacked tunnel on the existing tunnel and surrounding strata.The research results indicate that the maximum surface settlement caused by the construction of line 8 is 13.73 mm,and the settlement curve is superimposed in a V-shape;The existing line 3 tunnel is minimally disturbed,with deformation control within 1 mm;During the process of the right line of line 8 passing over the left line,there was significant lining deformation in the left line,with arch crown and arch bottom deformations reaching-13.16 mm and-12.99 mm,respectively.In response to the above-mentioned disturbances,control measures such as grouting reinforcement of the interlayer between the upper and lower layers of the tunnel and installation of support trolleys in the tunnel are proposed,which could effectively reduce lining deformation and surface settlement.The relevant research results could provide reference and inspiration for the design and construction of similar group cavities stacked tunnel.

关 键 词：地铁 叠落隧道 隧道群洞效应 衬砌变形 地表沉降 变形控制 

分 类 号：U231[交通运输工程—道路与铁道工程]