桩周土局部软化或强化对群桩性状的影响

Effect of local softening & stiffening around pile shaft on pile group

当桩入土时,由于桩周土的性质不同将引起桩周土的局部软化或局部强化现象。提出一个能够考虑桩周土局部软化或局部强化对桩的性状影响的桩筏或桩箱共同作用的分析方法,并通过工程实例,分析不同参数情况下土对群桩基础的影响,提出一个能够考虑桩周土的软化和强化对桩性状影响的共同作用的实用方法。同时也分析了在局部软化和硬化情况下对群桩的沉降以及受力的影响。

This paper presents a piled raft or piled box interaction approach which can provide a practical means of considering the effect of local softening and stiffening around the pile shaft. A test of pile group is taken as an example to illustrate the effect of variables on pile group and an approach for evaluating the effect of local softening and stiffening around pile shaft for use in an interaction analysis, is proposed .