狭长基坑中地下连续墙的简化计算模型  

SIMPLIFIED ANALYTICAL MODEL OF DIAPHRAGM WALL IN LONG FOUNDATION PIT

作　　者：姜忻良[1] 徐炳伟[1] 

机构地区：[1]天津大学建工学院,天津300072

出　　处：《工程力学》2009年第A01期33-36,共4页Engineering Mechanics

摘　　要：在狭长基坑计算中,为提高地下连续墙计算模型的计算效率,采用双曲线非线性弹簧元模拟土的弹塑性,建立了地下连续墙的简化计算模型。模型取地下连续墙的槽段宽度作为计算宽度,分析其接头方式及所在位置给出六种不同边界条件,并考虑土的分层和支撑预压力的影响。通过对天津某狭长基坑的地下连续墙的计算表明,计算结果与实测值吻合较好。该文为模拟基坑开挖过程,预测地下连续墙变形提供了简便有效的计算方法。Through studying long foundation pits, a simplified computing model of diaphragm wall is established to improve model＇s computing efficiency. In the model, the hyperbolic nonlinear spring element was adopted to simulate the elasto-plastic interaction between the wall and the foundation soil. The model＇s calculation width is supposed to be that of the diaphragm wall segment and its six kinds of boundary conditions are determined according to the locations of the segments＇ junctions and the way they joint. Furthermore, soil stratifying and the supports＇ pre-force are considered. The model＇s computed results agree quite well with the in-place data by computing the diaphragm wall of one foundation pit in Tianjin. It gives a simple and effective computing method for simulating the process of foundation pits＇ excavation and for forecasting diaphragm walls＇ deformation.

关 键 词：狭长基坑 地下连续墙 简化计算 双曲线 非线性弹簧元 

分 类 号：TU473[建筑科学—结构工程]