地铁盾构隧道下穿水闸的地表变形控制标准研究

Study on the Control Standard of Surface Deformation for Shield Tunnels Excavated below Sluice

随着地铁盾构隧道的大规模建设,盾构隧道下穿水闸的工程案例越来越多。该文旨在提出合理的地铁盾构隧道下穿水闸的地表变形控制标准,以保证水闸的安全运行。在分析盾构下穿引起水闸破坏形式的基础上,采用对规范的梳理、工程案例类比分析相结合的方法,对盾构隧道下穿水闸的地表变形控制标准进行了探讨研究。结果表明,可从地表沉降和隆起、竖向差异变形、水平差异变形三方面设置地表变形控制标准。文中提出的控制标准可为类似地铁盾构隧道下穿水闸的工程项目提供借鉴与参考。

With the numerous construction of subway shield tunnels,there are more and more engineering cases that subway shield tunnels are excavated below sluice.Due to the complexity of surface deformation caused by the subway shield tunnel excavation,the control standard of the ground surface deformation is not involved in current specifications.In this paper,the failure modes of sluice caused by shield tunnel excavation are analyzed firstly,and then,the surface deformation control standard for shield tunnel excavation below sluice is proposed by combined means of studying specifications comprehensively and analyzing engineering cases.Based on an actual project,the engineering application research is carried out,which can provide references for similar projects in which subway shield tunnels are excavated below sluice.