新建地铁附属结构施工对既有地铁结构的影响研究

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关键词：地铁附属结构；既有地铁；Midas-GTS；变形控制；运营安全

中图分类号：U451；U231；TU753文献标志码：A 文章编号：1003-5168（2025）13-0071-06

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.13.014

Study on the Impact of New Metro Ancillary Structure Construction on Existing Operational Metro Structures

WANG Yuanliu1GE Xinhu'YI Lingbing1 ZHANG Peng²NI Hanjie²DENG Kangkang² （1.Zhengzhou Urban Construction Vocational College， Zhengzhou 45oooo，China; 2.China Railway Tunnel Bureau Group （Shanghai） Special High-Tech Co.，Ltd.， Shanghai 2013O6， China）

Abstract： [Purposes] Study the impact of constructing of new metro ancillarg structures on existing operatonal metro structures.[Methods] Taking a specific metro project as a case study，a three-dimensional numerical calculation model was established using the numerical simulation software Midas GTS to simulate the construction process of new entrances and connecting channels.The deformation patterns and stress variation in the existing metro structure caused by the construction of new metro entrances and connecting channels were analyzed.[Findings] During the construction of new metro ancillary facilities， the maximum vertical defor mation of the existing metro station structure and tunnel segment structure was 0.27mm and 0.03mm respectively，both below the vertical deformation control value of O.3 mm; during the construction process，the maximum horizontal deformation of the existing metrostation structure was 0.19mm ，and the maximum horizontal deformation of the existing tunnel segment structure was 0.04 mm;the maximum differential settlement in the track area reached 0.13mm at Deformation Joint No2. After the completion of construction，the maximum and minimum principal stresses of the existing metro station structure reduced by O.42 MPa and O.34 MPa respectively，and the maximum and minimum principal stresses of the tunnel segment structure reduced by O.O6 MPa and O.O1 MPa respectively. [Conclusions] The deformationand stress variations caused by construction are both below the limit values.The accuracy of the model was verified by comparing the numerical calculation results with the field monitoring data.The research results can provide reference for the design and construction of similar projects.

Keywords： metro accessory structures; existing metro; Midas-GTS； defor mation control; operational safety

0 引言

随着我国城市化进程的加速，地铁网络逐步加密，新建地铁线路与既有线路的空间交叉问题日益突出。（剩余5136字）