层状土中群桩沉降分析

A SEMI-ANALYTICAL APPROACH TO ANALYSE THE SETTLEMENT OF PILE GROUPS IN LAYERED SOILS

本文提出一个半解析的方法分析单桩和群桩基础的沉降,地基土可以是任意层状的,并且可以是有限深的。单桩沉降采用荷载传递法计算,群桩中桩一桩相互作用采用近似解析法计算。通过与其它数值分析方法结果的对比,表明本文提出的方法与更严密的计算方法有很好的一致性,能大大减少计算量,可分析桩数较多的群桩基础。

This paper presents a semi-analytical approach for calculating the settlement of pile groups. The soil profile may be arbitrarily layered or underlain by either a stiff or a rigid stratum at a certain depth. For a single pile, the settlement is determined by using the load transfer approach, while the coeffecient of pile to pile is determined using an approximate solution. Good agreement between the calculated results by the present method and the more rigorous approaches is observed for the analysis of single pile and pile groups. These results show that this semi-analytical approach has an advantage of saving the capacity of computer over the rigorous ones.