基于渗流应力耦合的深基坑工程渗流场与变形数值模拟  

Numerical simulation of seepage field and deformation for deep foundation pit based on hydromechanical coupling model

作　　者：孙富学[1] 朱云辉[1] 杨昭宇[1] 阮长锋[1] 

机构地区：[1]温州大学建筑与土木工程学院,浙江温州325035

出　　处：《工程勘察》2009年第1期24-27,共4页Geotechnical Investigation & Surveying

基　　金：温州市科技计划项目(S20070041)

摘　　要：基于渗流-应力耦合的Biot三维固结有限元方程,对深基坑工程进行数值模拟。结果表明,地下连续墙的设置有效降低了基坑底部的水力梯度,有利坑底稳定。同时,随着开挖深度增加,坑底隆起变形、围护结构水平位移和地下连续墙承受的主动土压力均随之增大,围护结构最大水平位移点深度和地下连续墙反弯点位置逐渐下移。与工程实际规律吻合较好,可为类似工程借鉴。Numerical Simulation for deep foundation pit is developed based on 3-D Biot consolidation FEM equation considering hydromechanical coupling theory. The results show that diaphragm wall could decrease the hydraulic gradient at the bottom of the excavation effectively, wich is beneficial to the stability of foundation pit. With the increase of the excavation depth, the upheaval deformation of the pit bottom, the horizontal displacement of the enclosure structure and the active earth pressure acting on the diaphragm wall increase, meanwhile, the depth of the maximum horizontal displacement point of the enclosure structure and the inflection point of the diaphragm wall shift down. They show that the simulation results are in accordance with the engineering practice,and the results might be as reference for similar engineering projects.

关 键 词：数值模拟 渗流应力耦合 深基坑 渗流场 变形 

分 类 号：TU463[建筑科学—结构工程]