基于相互系数法的群桩沉降的推算

在单桩荷载曲线的基础上,采用相互系数法预估和推算群桩的平均沉降。主要展开了以下研究。首先应用有限元对桩桩相互系数进行数值分析,建立了桩桩相互系数的有限元模型,并在此基础上,以群桩为模型,通过数据回归提出推求桩桩相互系数的简略公式。其次由单桩沉降可分为可恢复的弹性部分和不可恢复的塑性部分,在推算群桩的平均沉降时只考虑弹性沉降部分的叠加,对塑性部分不考虑其群桩效应的叠加。从而建立了预估群桩的平均沉降的方法。

Calculates the Average Settlement of Piles Groups Based on the Interaction Factors

Base on the curve of single pile,this thesis calculates the average settlement of piles groups used the interaction factors.The studies of the thesis consist of the following contents.Firstly analysis the interaction factors of pile to pile by finite element method.At first,the finite element model of the interaction factors of pile to pile is advanced and tested.At last,the simple formula of interaction factors of pile to pile is built up as the model of the pile groups.Secondly the settlement of single pile from load test consists of recoverable elastic part and unrecoverable plasticity part,only the recoverable elastic part is stacked in the settlement of pile group,and the unrecoverable plasticity part is not stacked.So the method of calculated the average settlement of pile group is advanced.