水泥土连拱支护结构的三维有限元分析  

Three Dimensional FEM Analysis of Continuous Arched Soil-cement Retaining Structure

作　　者：郭院成[1] 杨文[2] 周同和[3] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]国家电力公司中南勘测设计研究院,湖南长沙410014 [3]郑州大学综合设计研究院,河南郑州450002

出　　处：《郑州大学学报（工学版）》2008年第1期66-69,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省自然科学基金资助项目(0611010300)

摘　　要：采用有限元方法，建立了水泥土连拱支护结构考虑结构与土共同作用的三维模型，对该结构进行了数值模拟计算．计算结果分析表明，其墙后土压力大小介于静止土压力与朗肯土压力之间，沿竖向呈三角形分布，沿水平向介于水平均布与径向均布之间，土压力作用在支护结构后将沿水平及竖向分配，水平拱体分担的荷载比例最大值在60％～70％之间，水泥土拱基本处于全截面受压状态，拱脚桩在开挖面以上的受力模式与悬臂桩类似，沿全长其弯矩最大值在开挖面位置．The Continuous Arched Soil- cement Retaining Structure （CASRS） is analyzed in this paper. The FEM method is employed and a three dimensional model considering the interaction between the bracing structure and the soil is built for carrying out numerical simulation. The result shows that the earth pressure in active area is of triangularly distribution in vertical direction, and of a distribution between horizontal equal and radical equal in level direction, which has a value between static earth pressure and Rankine earth pressure. The earth pressure is allocated along vertical and horizontal directions, and a maximum part of about 60% - 70% is assigned to the horizontal arch body. The most part of soil - cement arch body is under compressive state, and the force pattern of spring pile above excavation depth is similar to a cantilever pile, of which the maximum bending moment is located at excavation depth.

关 键 词：基坑支护 水泥土连拱 土压力 拱体 有限元 数值模拟 

分 类 号：TU470.3[建筑科学—结构工程]