地铁出入口顶管施工对既有区间隧道影响控制  

IMPACT CONTROL OF ENTRANCE AND EXIT OF SUBWAYS CONSTRUCTED WITH PIPE-JACKING METHOD ON EXISTING INTERVAL TUNNELS

作　　者：张委定 龚云强 曹力桥 ZHANG Weiding;Gong Yunqiang;CAO Liqiao(Tianjin Municipal Engineering Design and Research Institute Co.,Ltd.,Tianjin 300051,China;North China Munici Engineering Design and Research Institute Co.,Ltd.,Tianjin 300074,China;PowerChina HuaDong Engineering Corporatior Limited,Hangzhou 311100,China)

机构地区：[1]天津市政工程设计研究总院有限公司,天津300051 [2]中国市政工程华北设计研究总院有限公司,天津300074 [3]中国电建集团华东勘测设计研究院有限公司,杭州311100

出　　处：《低温建筑技术》2024年第4期71-75,共5页Low Temperature Architecture Technology

摘　　要：为分析地铁出入口顶管施工对既有区间隧道的影响,在阐述区间隧道保护措施的基础上,建立了三维有限元分析模型,研究了始发井、接收井及顶管施工阶段下区间隧道水平位移和竖向位移分布特征,详细分析了道床沉降和隧道水平位移变化规律。研究结果表明,车站附近道床主要为隆起,远离车站的道床为沉降;顶管掘进对区间隧道影响大于工作井,是关键阶段;靠近顶管的区间隧道和远离顶管的区间隧道水平收敛显著变化的范围约为隧道的5倍、3倍洞径;在针对性的保护措施下,区间隧道位移满足控制标准。所得结论可为类似工程提供借鉴与参考。The construction of subway entrance and exit with pipe-jacking method has an apparent impact on existing interval tunnel.Based on the elaboration of tunnel protection measures,a three-dimensional finite element analysis model is established.This paper studies the distribution characteristics of horizontal and vertical displacement of interval tunnels during the construction stages of launching shaft,receiving shaft,and pipe jacking.The changing law of roadbed settlement and tunnel horizontal displacement are analyzed in details.The results show that the roadbed settlement near subway station is mainly uplift and the roadbed settlement far from subway station is settlement.The impact of pipe jacking excavation on interval tunnels is greater than that of working shaft excavation,and pipe jacking excavation is a key stage.The significant change range of horizontal convergence for the near and far tunnels is about 5 and 3 times of tunnel diameters.Under those targeted protection measures,the displacement of interval tunnels meets the control standards.

关 键 词：既有区间隧道 隧道水平位移 道床沉降 

分 类 号：TU745.3[建筑科学—建筑技术科学]