岩土工程学报2025，Vol.47Issue(z2)：25-29,5.DOI:10.11779/CJGE2025S20001
软土地区新建地铁上穿既有盾构隧道实测分析
Monitoring and analysis of newly-built subway over-passing through existing shield tunnels in soft soil areas
摘要
Abstract
Currently,many control and protection technologies have been applied in the construction of cross-passing projects.However,their implementation effects are dynamic and influenced by multiple factors.Therefore,further research is still needed to optimize the selection and implementation effect of these technologies,so as to adapt to increasingly complex underground engineering problems.This article carries out relevant monitoring data analysis based on the engineering project of Ningbo Metro Line 5 crossing over the existing Line 2.The results show that the vertical deformation of the existing tunnel is significantly affected by the superimposed construction of the new shield tunnel,with obvious spatial and superimposed effects.The vertical deformation of the existing tunnel generally manifests as bulging with a unilateral influence range of 6～7 times the outer diameter of the tunnel.The transverse deformation manifests as"vertical duck egg"shaped elliptical deformation with horizontal contraction and vertical expansion.More importantly,when constructing a new subway tunnel over-passing through the existing shield tunnel,a combination of several control and protection technologies used in this project has proved to be effective,including controlling construction parameters,weighting measurements,reinforcement of existing tunnel segments,soil reinforcement,intensifying monitoring and informationized construction.This paper can be used as a reference for similar projects.关键词
软土/盾构隧道/上穿施工/自动化监测/控制技术Key words
soft soil/shield tunneling/overpass construction/automated monitoring/control technology分类
交通工程引用本文复制引用
罗敏敏,陈赟,申文明,李格烨,黄家晟,方利泽..软土地区新建地铁上穿既有盾构隧道实测分析[J].岩土工程学报,2025,47(z2):25-29,5.基金项目
浙江省建设科研项目(2023K195) （2023K195）
山西省基础研究计划项目(202403021222137) （202403021222137）
杭州市建设科研项目(2024347) （2024347）
