桩筏共同作用的改进Geddes计算模型与变刚度调平设计

Geddes应力法虽然实现了桩与桩之间的相互作用,但由于没有考虑筏板的刚度,无法实现桩与筏板的共同作用。对Geddes模型进行了改进,以实现桩与筏板的共同作用。通过一工程实例,验证了此改进模型的正确性,并利用此模型,阐述了通过调整桩的疏密布置进行设计的概念和方法,达到减小差异沉降、防止结构产生次应力和节约工程造价的目的。

Pile-raft interaction by using modified Geddes model and variable rigidity design method for balance settlement

Although the interaction among piles should be calculated by Geddes’s stress method, which can not consider the raft rigidity, it can’t be applied to pile-raft interaction. Geddes’s stress method is modified and the modified calculation models is verified in practice. The balance settlement method based on variable rigidity which can reduce differential settlement and hypo-stress is introduced through adjusting the array of pile group.