弹性地基有限元法在基坑工程中的应用

基于弹性地基有限元法,利用等效文克尔弹性地基梁模型,采用模块化处理方式模拟基坑开挖的各种影响因素,编制C语言有限元分析程序对围护结构进行分析计算.程序结合采用弹性法,考虑其中的不足,在迭代计算中对围护结构变形和支撑轴力进行修正,以模拟围护结构随开挖过程变形对内力的影响,简单方便的解决实际工程中围护结构受力分析.结合上海地铁M8线嫩江路车站工程深基坑工程进行实例分析,发现程序计算结果能够较好的与实测值吻合.说明该法能够很好的应用于支挡结构内力变形计算,并可以给三维通用有限元分析以借鉴.

FEM on Elastic Foundation and Its Extend Application to Excavation Engineering

Based on the principle of finite element method on elastic foundation,using equivalent model of winkle beam on elastic foundation,a computing program has been programmed by turbo C.And modular simulation is adopted for simulating different factors to affect the excavation.The analysis is based on elasticity method.Considering its drawback,the deformation and the axils force are modified in the solving progress which is for simulation the affect by the deformation of the reforcing system.Combine with analysis of the excavation of the station of Neng-Jiang road,it is found that the result is coincided with the field testing value which shows the applicability of the method.And also,it could be referenced by the 3-D FEM analysis.