首页期刊在线 2023年（第26卷）第3期

换乘车站基坑开挖及区间暗挖下穿施工对既有地铁站的变形控制及影响分析

朱斌

Deformation Control and Influence Analysis of Interchange Station Foundation Pit Excavation and Interval Covered Under-passing Excavation on Existing Metro Station

ZHU Bin

作者信息:

安徽省综合交通研究院股份有限公司， 230001，合肥
Affiliation:

Anhui Comprehensive Transportation Research Institute Co., Ltd., 230001, Hefei, China
关键词:

地铁换乘站;基坑开挖;暗挖下穿既有车站;变形控制
Key words:

metro interchange station;foundation pit excavation;covered excavation under-passing existing station;deformation control
DOI:

10.16037/j.1007-869x.2023.03.033
中图分类号/CLCN:

TU433∶U231.4
栏目/Col:

研究报告

摘要:

为研究既有车站影响保护区内深基坑施工及暗挖下穿对其的变形及内力的影响，并对既有车站进行施工阶段过程中的安全性评估，以合肥市某地铁换乘车站项目为依托，并参考行业内标准及相似案例，给出相应的变形控制标准。利用有限元分析软件MIDAS GTS对项目施工全过程进行三维建模，并与现场监测数据进行对比。研究结果表明：合肥地铁8号线工程施工全过程完成时，3号线主体结构变形最大沉降为2.39 mm，满足控制标准要求；主体结构承载力和抗裂缝要求均满足要求。

Abstracts:

To study the influence of the deep foundation pit construction and covered under-passing excavation in the existing station protected area on the deformation and internal force of the station, and to evaluate its safety during the construction stage, a metro interchange station project in Hefei is taken as a basis and by referring to industry standards and similar cases, corresponding deformation control standards are given. Using the finite element analysis software MIDAS GTS, a construction 3D modeling for the whole project process is carried out and compared with the on-site monitoring data. The results show that: when the whole construction process of Hefei Metro Line 8 is completed, the maximum subsidence of Line 3 main structure deformation is 2.39 mm, which meets the requirements of the control standard. The bearing capacity and crack resistance of the main structure both fulfil the requirements.