地铁换乘站深基坑围护结构变形规律FLAC模拟研究  

FLAC Simulation study on Supporting Deformation Law of Deep Excavation in Subway Transfer Station

作　　者：任建喜[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《陕西能源职业技术学院学报》2008年第3期15-18,44,共5页

基　　金：基金项目：教育部重点项目（207119）资助

摘　　要：本文以北京奥运支线大屯路地铁换乘站深基坑工程为背景，通过现场监测和FLAC有限差分法模拟计算的方法对深基坑开挖过程中的变形规律进行了研究。研究表明，复杂环境下城市地铁换乘站深基坑明挖施工时，现场监测是信息化安全施工的保证，对于形状复杂的车站基坑应该采用围护桩、钢支撑和锚索等组成的复合维护形式作为基坑的围护结构，土方分层开挖方式和钢支撑预应力施加是减少空间效应保证安全施工的重要手段，FLAC的计算结果与现场监测结果基本一致。Based on the deep excavation of Datunlu metro transfer Station Olympic Games subway branch in Beijing, the deformation laws of deep excavation of metro transfer Station are studied with the methods of in - situ monitoring and FLAC simulation. The result indicates that the open -cut method in urban Subway Station construct, in -situ monitoring is station safe information construction assurance. Using compound maintenance form which is composed of retaining structure , steel support and anchor wire as the chief excavation retaining structure in station excavation supporting, The excavation method of separated layer and apply inherent stress on steel support is the important method to reduce space -time effect during the construction process. The FLAC simulated results is consistent to the in -situ monitoring results.

关 键 词：深基坑 围护结构 变形规律 FLAC模拟 监测 

分 类 号：U231.4[交通运输工程—道路与铁道工程]