刚性桩复合路基沉降计算数值解法

Numerical Algorithm for Rigid-Pile Composite Foundation

本文基于桩身压缩量法,提出了一种求解刚性桩复合路基桩-土相对位移的数值计算方法。该方法根据对称面剪应力等于零的力学原理,将桩网路基分割为单桩独立柱体模型,通过编制计算机程序求解桩身零摩阻区或中性点,以及桩顶、桩端刺入量,进而计算出桩侧摩阻力、桩体轴力及路基沉降。通过工程实例进行比较,表明该计算方法具有较好的精度。

Based on the method of pile compression,a new pile-soil relative displacements numerical algorithm method for rigid-pile composite subgrade is proposed. The pile subgrade is divided into single pile columnar model by the continuum mechanics principle about zero shear stress in symmetric plane. Zero frictional resistance area（ or neutral point） and upper and lower penetration is solved out by the program and then the pile frictional resistance,the subgrade settlement and the axial force distribution of pile body can be worked out. The practical examples prove that the new method has better precision for settlement calculation.