大口径灌注桩竖向承载力的影响因素及其评价

Influential Factors on Vertical Bearing Capacity of Large Diameter Cast-in-place Pile and Their Evaluations

本文通过分析桩底沉渣、桩侧泥皮厚度、孔壁形状、成桩时间及施工工艺等对大口径灌注桩承载力的影响 ,提出了在桩承载力计算中引入清底系数及成桩工艺系数 ,并控制成桩总时间以较准确地评价单桩承载力的方法。

Method to evaluate pile capacity precisely by using the coefficient of cleaning slime and coefficient of construction process and by controlling the total duration of construction is proposed herein after analyzing the influences of slime at pile bottom,thickness of mudcake by the side of pile,shape of hole wall,time of construction and construction process on the bearing capacity of large diameter cast in place pile.