深基坑工程考虑时空效应的计算方法研究  

Research on Calculation Method Considering Time-space Effect in Deep Excavation Projects

作　　者：沈健[1] 王卫东[1] 王建华[2] 

机构地区：[1]华东建筑设计研究院有限公司,上海200002 [2]上海交通大学土木工程系,200030

出　　处：《建筑结构》2007年第5期117-119,124,共4页Building Structure

基　　金：上海市科委重点攻关项目:深层地下结构开发关键技术研究(052112010)

摘　　要：基于深基坑工程实践提出了基坑支护结构计算的三维“m”法,建立用于分析支护结构的空间效应的三维计算模型。提出了模拟目前工程中常用的分区开挖与盆式开挖的方法和相应的被动区土体基床系数的计算公式,同时将坑内被动区土体基床系数的比例系数(m值)表示为时间的函数来反映深基坑工程的时间效应。方法在上海南站北广场及其相关工程中得到了应用,效果较好,表明考虑时空效应计算方法合理实用。Based on engineering practice, the 3-D ＂m＂ method of retaining structure in deep excavations is put forward. The 3-D calculation model of retaining structure is used to analyze the space effect of retaining structures, and the formula of ks value in passive area, when using 3-D ＂ m＂ method to simulate sub area excavation and basin excavation which are two common construction methods in practical projects, is also introduced. The ＂m＂ value of soil is expressed as a function of time to reflect the time effect of deep excavation projects. Good effect is acquired through the application of this method in the project of noah square on Shanghai south railway station and other relevant projects, and it is indicated that the calculation method is rational and practical.

关 键 词：深基坑工程 时空效应 三维“m”法 盆式开挖 分区开挖 空间效应 时间效应 

分 类 号：TU473.2[建筑科学—结构工程]