桩筏基础与地基共同作用分析方法及其应用

摘要

Based on the theory of Boussinesq and Mindlin elastic solution,the displacement equations of ground subjected to local load is developed.Based on the elastic theory of slab,through the semi-analytical and semi-numerical method,the theory of interaction between piled raft foundation and ground is given also.Furthermore,the application of the method in this paper is illustrated by an engineering project.Engineering example proved that this method had good practicality in engineering utility.%通过离散,将桩筏基础与地基的共同作用化为桩、筏、土的共同作用问题,在土的Boussinesq解和Mindlin弹性理论解的基础上,推导得到了不同荷载分布情况下的积分解答.同时利用板的弹性理论,得到了地基上筏板的理论解.在此基础上,利用桩、筏、土之间的力与位移协调,采用半解析、半数值方法,给出了桩筏基础与地基共同作用理论推导过程.最后通过工程实例,说明了方法的具体应用,实例表明,方法具有较好的工程实用性.