桥梁桩基础沉降简化计算

Simplified Method to Calculate the Settlement of Bridge Pile Foundation

本文利用剪切位移法分析计算软质基岩上的嵌岩桩沉降变形。对嵌岩桩的沉降计算模型进行简化,并利用该简化模型进行实际工程的计算,结果表明,当桩顶荷载较小时,计算值往往偏大;当荷载在设计值附近时,剪切位移法计算结果和实测值基本一致,因此,在实际工程中可以采用本文的简化模型求解桥台桩基础的沉降。

The refined load-transfer method was used to analyze the settlement of socketed pile on soft rock foundation.And on the basis of the analysis,a simplified model to calculate the settlement of the pile foundation was established.The new model was also applied to compute the vertical deformation of the socketed pile.It is shown that the calculated result is less than the measured one as the load on the pile top is small.Meanwhile when the load approaching the designing value,the good agreement between the computed result and the experiment become more and more evident.It is suggested that the simplified model should be applied to analyze the settlement of the piles in practice.