基于实测沉降比的群桩沉降分析

Settlement Behavior of Pile Group Based on Settlment Ratio

摘要:

由于单桩试桩曲线包含了丰富的桩土相互作用信息，在一定程度上直接反应了现场土质的力学性态，所以提出利用单桩静载试验来推求群桩沉降.考虑到目前桩基理论计算出来的相互作用系数夸大了群桩间的相互作用，因此收集了77组单群桩沉降实测资料，利用其中71组进行统计分析,得到了群桩沉降比公式，对其余6组进行实例分析,结果表明该方法合理，具有较强的适用性.

Abstract:

The QS curve of single pile contains much information of pilesoil interaction and construction influence.So it’s reasonable that QS curve should be combined with the analysis of pile group settlement.Then calculation method of pile group settlement based on QS curve is proposed.Many researches show pile group interaction theory overestimates interaction effect in pile group.This paper collects 77 observational examples including single pile settlement and pile group settlement.71 examples are used in calculating settlement ratio.Lastly six examples are analyzed with pile group settlement method based on QS curve.Analysis results show the method is reasonable,more accurate and has strong regional applicability.