（1 煤炭工业济南设计研究院有限公司,济南 250031；2 中国五洲工程设计集团有限公司，北京 100053）

[摘要] 合肥地下轨道交通大东门站基坑建设是在软土地质条件下进行的大断面基坑开挖建设，由于开挖基坑距离重点保护的合肥古井假日酒店较近，在开挖之前需要做出科学的分析。采用有限元分析软件，建立基坑开挖土岩体与支护结构的数值分析模型，通过分步施工步骤进行计算分析，得出基坑开挖对古井假日酒店影响的分析结果，验证了通过有限元计算来预测基坑变形的可行性，并得出软土地质条件下基坑变形一般规律的结论。

[关键词] 软土；基坑支护；沉降变形；有限元

中图分类号： TU433                文献标识码：A            文章编号：1002-848X（）

作者简介：李志禄，学士，高级工程师，Email：lizhilu@cjdchina.com。

Deformation monitoring and numerical simulation analysis of deep foundation pit under rock-soil combinational geological condition

Li Zhilu¹，Sun Dongchen¹，Yin Zhiwei²

（1 Coal Industry Jinan Design & Research Co., Ltd., Jinan 250031, China; China Wuzhou Design Group Co., Ltd., Beijing 100053, China)

Abstract: Hefei underground rail traffic construction of DaDongMen Railway Station foundation pit excavation is the construction of large cross section excavation in soft soil geological condition. Due to focus on the Holiday in Hefei Gujing Hotel near the excavation of foundation pit, need to make scientific analysis. By using the finite element analysis software, excavation in rock mass and supporting structure of the numerical analysis model were established by step excavation, analyzed with construction procedure. The analysis result of the numerical analysis model verifies the feasibility to predict the deformation of foundation pit by finite element analysis, and concludes the general rules of deformation under the geological condition of soft soil foundation pit, with a view to similar engineering to provide certain reference value.

Keywords: soft soil; foundation pit; deformation; finite element

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