市政技术2025，Vol.43Issue(8)：27-35,9.DOI:10.19922/j.1009-7767.2025.08.027
盾构切削28 mm主筋围护桩及小净距下穿既有车站施工全过程影响规律与控制研究
Research on the Construction Impact and Control of Shield Tunneling Cutting Through 28 mm Main Reinforcement Retaining Piles and Small Clearance Underneath the Existing Stations
摘要
Abstract
With the increase of the density of urban rail transit network,that shield tunnels with small clear distance passing through the existing stations and cutting the retaining piles with main reinforcement are increasing.Its defor-mation control and construction safety are very important to ensure the subway operation.Based on the project of the section from Shigu Station-Liuxiandong Station of Shenzhen Metro Line 13 underpass Liuxiandong Station of Line 5,the influence of shield construction cutting the existing station retaining piles on the station structure was analyzed by 3D numerical simulation.A 3D model of double line shield tunnel,the existing station structure and surrounding strata was established by MIDAS/GTS finite element software.The cutting effect of retaining piles,deformation characteristics of the existing station structure and strata settlement law were evaluated during shield tunneling.The results show that the additional stress of the existing station structure caused by shield cutting is smaller,and the deformation of the station meets the safety requirements;By accurately controlling the shield tunneling parameters,tool selection and grouting measures,the strata deformation can be effectively controlled to ensure the safety of the existing station structure.In addition,the control measures of geological survey,parameter control and real-time monitoring in the cutting section are studied,which provides a reference for the safe construction of similar projects.关键词
地铁车站/小净距下穿/盾构切削/主筋围护桩/结构变形/MIDAS/GTS数值模拟Key words
subway station/small clearance undercrossing/shield tunneling cutting/retaining pile of the main re-inforcement/structural deformation/MIDAS/GTS numerical simulation分类
交通工程引用本文复制引用
徐恢荣..盾构切削28 mm主筋围护桩及小净距下穿既有车站施工全过程影响规律与控制研究[J].市政技术,2025,43(8):27-35,9.基金项目
国家自然科学基金重点项目(51938008) （51938008）
国家重点研发计划(2022YFC3800905) （2022YFC3800905）
