综合管廊盾构小距离上穿既有运营盾构隧道结构变形数值模拟及施工控制  

Numerical Simulation of Deformation and Construction Control for Small-Distance Over-Crossing of an Existing Metro Shield Tunnel by an Urban Utility Tunnel Shield

作　　者：徐军平 楼岱 林吉 宗文亮 XU Jun-ping;LOU Dai;LIN Ji;ZONG Wen-liang(Ningbo Urban Underground Space Investment Co.,Ltd.,Ningbo 31500,China;Ningbo Public Engineering Construction Center Co.,Ltd.,Ningbo 31500,China;Hongrun Construction Group Co.,Ltd.,Ningbo 31500,China)

机构地区：[1]宁波城市地下空间投资有限公司,浙江宁波315000 [2]宁波市公共工程建设中心有限公司,浙江宁波315000 [3]宏润建设集团股份有限公司,浙江宁波315000

出　　处：《浙江交通职业技术学院学报》2024年第4期1-7,共7页Journal of Zhejiang Institute of Communications

基　　金：浙江省住房与城乡建设厅建设科研项目(2022K152)。

摘　　要：新建线路盾构上穿既有盾构隧道,不可避免地会打破原有地层的平衡,导致土层的变形,进而引起既有盾构隧道的变形,发生隧道管片碎裂、错台、线型偏移、渗漏水等现象,甚者导致列车停运的重大社会影响事故发生等。本文以宁波市鄞州大道-福庆路综合管廊工程为例,采用Midas GTS NX有限元分析软件建立三维数值模型,计算既有运营隧道在上穿施工过程中的变形数值。通过采取精细化的施工控制措施手段,总结了上穿过程施工技术特点,分析了既有运营隧道的变形规律,为相关工程施工积累了经验,提供了可靠的参考依据。The construction of a new line shield tunneling through an existing shield tunnel will inevitably disrupt the balance of the original strata,lead to deformation of the soil layer and subsequently cause deformation of the existing shield tunnel,result in phenomena such as tunnel segment fragmentation,misalignment,line deviation,water leakage,and even major social impact accidents such as train shutdown.This article took the Yinzhou Avenue Fuqing Road comprehensive pipe gallery project in Ningbo City as an example,and used Midas GTS NX finite element analysis software to establish a three-dimensional numerical model to calculate the deformation values of the existing operating tunnel during the upper crossing construction process.By adopting refined construction control measures,the construction technology measures during the upper crossing process were summarized,and the deformation laws of existing operating tunnels were analyzed,which will accumulate experience and provide reliable reference for similar engineering construction in the future.

关 键 词：综合管廊 盾构 小距离 上穿 运营盾构隧道 

分 类 号：U455[建筑科学—桥梁与隧道工程]