Subsequently , the thesis improves the simplified method , and puts forward an iterative algorithm to consider the influence by raft rigidity to substratum settlement and stab deformation . then , numeric examples are calculated to testify its validity . finally , the application of the method is introduced on a factual project and differences between the simplified method and the improved method are discussed 在此基础上,本文改进了简化共同作用分析方法,提出了考虑筏板刚度对下卧层沉降的影响和桩端刺入变形,满足桩?土?筏位移协调的共同作用迭代分析算法,并通过数值算例验证了该算法的有效性。