淤泥夹砂复合地层地铁车站基坑稳定性分析  

Stability analysis of subway station foundation pit in composite layer of silt and sand

作　　者：李斌 谭永明 杨涛 Li Bin;Tan Yongming;Yang Tao(Rail Engineering Co.,Ltd.,China Railway 22nd Bureau Group,Beijing 100043,China;School of Science,Qingdao University of Technology,Qingdao Shandong 266520,China)

机构地区：[1]中铁二十二局集团轨道工程有限公司,北京100043 [2]青岛理工大学理学院,山东青岛266520

出　　处：《山西建筑》2024年第12期70-73,共4页Shanxi Architecture

基　　金：岩土力学与工程国家重点实验室开放基金项目(项目编号:SKLGME021019)。

摘　　要：地铁作为一种高效、便捷的交通工具在城市交通系统中起着越来越重要的作用,在青岛等滨海填海造陆地区,淤泥夹砂复合地层在地铁车站基坑工程中是一个常见但复杂的地质条件。通过深入研究淤泥夹砂复合地层条件得到基坑开挖参数,制定基坑分层开挖方案,利用三维离散元数值模拟软件3DEC对基坑开挖进行模拟,分析了地铁车站基坑工程的稳定性问题,并提出了基坑开挖时采取的措施。通过对工程实施期间支护结构、周围岩土体及周边环境的变形规律和受力范围开展严密的现场监测,探讨了淤泥夹砂复合地层的地质特征、水文地质条件以及其对基坑工程稳定性的潜在影响,可为城市轨道交通工程实践提供有价值的参考和建议。The metro,as an efficient and convenient means of transportation,plays an increasingly important role in the urban transportation system.In coastal land reclamation areas such as Qingdao,the composite layer of silt and sand is a common but complex geological condition in metro station foundation pit engineering.By conducting in-depth research on the conditions of silt sand composite strata,the excavation parameters of the foundation pit were obtained,and a layered excavation plan for the foundation pit was formulated.The three-dimensional discrete element numerical simulation software 3DEC was used to simulate the excavation of the foundation pit,analyze the stability issues of the metro station foundation pit project,and propose measures to be taken during the excavation of the foundation pit.By conducting rigorous on-site monitoring of the deformation patterns and stress ranges of the support structure,surrounding rock and soil,and the surrounding environment during the implementation of the project,the geological characteristics,hydrogeological conditions,and potential impact on the stability of foundation pit engineering of the silt sand mixed composite layer were explored.This can provide valuable references and suggestions for the practice of urban rail transit engineering.

关 键 词：淤泥夹砂地层 基坑工程 地铁车站 稳定性分析 

分 类 号：TU941[建筑科学—建筑技术科学]