基坑支护桩受力的水平位移反演计算方法

桩的水平位移值易量测且结果可靠,因而可根据桩的实测位移值,运用位移反演分析方法对桩的受力特性进行分析。本文对桩的最终位移的构成进行了系统分析,而后运用最小二乘法原理,找到了相应的函数,使位移反演值与实测值之间的误差最小。通过对该函数的求解,得出了桩身各截面的水平位移、转角、弯矩和剪力等内力。最后将该方法运用于实例中,计算结果表明:反演值和“实测值”吻合程度较好,说明该方法作为桩的受力分析的理论方法是可行、可靠的。

Back Analysis on Horizontal Displacement of the Force of Pit Support Pile

The horizontal displacement of pile is more readily available and the measurement results are reliable.This paper focus on the force analysis of pile by displacements back analysis.Firstly,the composition of the final displacement of pile is analyzed systematically,then,to look for a corresponding function to make the smallest error between the measured values and inversion values by least square method.By solving the function,to calculate the horizontal displacement,angle and bending moment,shear of the pile.Finally,a back analysis proposed in the article is applied to an example and a conclusion is drawn that the inversion values and the measured values are in fairly good agreement,also it is approved that the method as an theoretical method for forcing analysis of pile is both feasible and reliable.