摘要
以郑州地铁7号线一期工程某盾构隧道下穿既有车站工程为背景,利用数值模拟方法研究盾构隧道施工全过程对既有车站的变形影响,通过与运营地铁车站自动化监测数据对比,数值分析结果与实测数据较为接近,为保障既有车站的正常运营提供了理论支持。研究结果表明:盾构隧道下穿既有运营车站期间,车站结构稳定,未出现新增裂缝、渗漏水等病害现象,车站各项变形指标均在控制值允许范围内,保障了车站的正常运营;相较于传统盾构法施工,采用克泥效工法施工引起的车站竖向变形明显减小;通过加强盾构刀盘设计,在磨除车站围护桩后盾构机顺利完成后续区间段掘进。
Based on the background of a shield tunnel passing under an existing station in the first phase of Zhengzhou Metro Line 7 project,this paper uses numerical simulation to study the deformation influence of the shield tunnel construction process on the existing station.Based on the comparison of the automated monitoring data of the operating subway station,the numerical analysis results are relatively close to the measured data,providing theoretical support for ensuring the normal operation of the existing station.The research results show that:(1)during the period of the shield tunnel passing under the existing operating station,the station structure remains stable without any new cracks,water leakage,or other defects.All deformation indicators of the station are within the allowable range of the control value,ensuring the normal operation of the station.(2)Compared with the traditional shield construction method,the vertical deformation of the station caused by the clay shock method construction is significantly reduced.(3)By strengthening the cutter head design of shield,the shield machine can successfully complete the subsequent section excavation after grinding away the station retaining piles.
作者
马涛
MA Tao(China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan Hubei 430063,China)
出处
《铁道建筑技术》
2024年第10期160-163,共4页
Railway Construction Technology
基金
国家重点研发计划项目(2023YFC3806702)。
关键词
盾构隧道
下穿施工
地铁车站
沉降控制
盾构磨桩
数值分析
shield tunnel
underpass construction
subway station
settlement control
shield grinding pile
numerical analysis
