临近地铁隧道的软土深基坑施工影响分析  

Analysis of effect on adjacent metro tunnels due to foundation pit excavation in soft ground

作　　者：马永峰 周丁恒[2] 曹力桥[3] 刘元钊 

机构地区：[1]中国石油天然气华东勘察设计研究院,青岛266071 [2]慕尼黑工业大学,慕尼黑81245 [3]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《青岛理工大学学报》2015年第1期34-40,共7页Journal of Qingdao University of Technology

摘　　要：以杭州某临近地铁隧道的软土深基坑工程为背景,运用有限元方法动态模拟基坑开挖过程,分析基坑变形以及对地铁隧道的影响,并对不同计算模型进行对比分析.研究结果表明:HSS模型考虑了地下水及时空效应的影响,较HS硬化模型能更好地模拟基坑施工过程;为控制基坑开挖对邻近地铁隧道的影响,需辅助其他措施,如分块开挖、基坑降水等;地下连续墙成槽过程无法模拟,施工中应尽量减小成槽对周边土体和隧道的影响.研究结论可为类似工程提供借鉴与参考.Based on one engineering practice of deep pit construction in soft ground,the application of finite element method to simulate the construction process of deep foundation pit is presented.The deformation of foundation pit and the excavation affection on metro tunnels are analyzed in detail with the results of different FEM models being compared and some conclusions drawn.Due to consideration of underground water and time-space effect,HSS model is more suitable for modeling pit construction than HS model.In order to control the effect on metro tunnel caused by pit construction,such measures as block excavation,dewatering should be taken.The process of concrete diaphragm wall trenching cannot be modeled,therefore,the deformation of surrounding soil and adjacent tunnel should be controlled during the construction process.The experience and conclusions presented can be referred in the design,construction and site monitoring of similar tunnels.

关 键 词：基坑工程 地铁隧道 施工影响 数值模拟 

分 类 号：TU9[建筑科学]