地铁车站深基坑围护结构变形规律监测研究  

Research on the Deformation Law of Supporting Structure for Deep Foundation Pit of Metro Station

作　　者：任建喜[1] 冯晓光[1] 刘慧[1] 秦杏春 

机构地区：[1]西安科技大学,西安710054 [2]西北综合勘察设计研究院,西安710003

出　　处：《铁道工程学报》2009年第3期89-92,共4页Journal of Railway Engineering Society

基　　金：教育部科学技术研究重点项目(207119);陕西省教育厅专项基金(08JK362)

摘　　要：研究目的:以北京地铁奥运支线森林公园地铁车站北区深基坑工程为依托,采用现场监测的方法研究深基坑围护结构变形规律,目的是为类似工程的信息化施工和围护结构优化设计提供帮助。研究结论:围护桩的最大水平位移与开挖深度和时间密切相关,在基坑开挖到一定深度而未架设钢支撑时,桩顶水平位移最大,随着基坑的开挖和钢支撑的架设,最大水平位移发生的位置也随之下移。钢筋轴力随着钢支撑的施加而减少,钢支撑可以有效控制围护桩水平位移和桩内钢筋内力的增大,气温对钢支撑的轴力变化有一定的影响。Research purposes： Taking deep excavation engineering in the north region of Forest Station on the Olympic branch line of Beijing Subway as an example, the deformation law of enclosure structure for deep foundation pit is studied by the in - site monitoring means for the purpose of providing the reference to optimizing the design and construction of similar engineering. Research conclusions：The maximal horizontal displacement of retaining pile is closely related with excavation depth and time. The horizontal displacement of the pile tops is the biggest when the deep foundation pit is excavated to a certain depth and steel brace has not been erected. With excavation of foundation and erection of the steel brace, the location of the biggest horizontal displacement shifts down. With increase of steel brace, the steel axis force decrease, so steel brace can effectively control horizontal displacements of retaining pile and internal force of steel in the pile. In addition, temperature has a certain effect on the axis force of steel brace.

关 键 词：地铁车站 深基坑 围护结构 变形规律 现场监测 

分 类 号：TU47[建筑科学—结构工程]