某工程静压预制桩终止压桩力与极限承载力关系研究  

Study on the relations between final pile static pressure and ultimate bearing capacity of static-load preformed piles

作　　者：李为国 

机构地区：[1]福建工大建筑设计院

出　　处：《中国勘察设计》2011年第9期64-67,共4页China Engineering Consulting

基　　金：福建工程学院科研发展基金(JB0226);龙岩市科技计划项目(2002LY18)

摘　　要：首先选择两种拟合模型对该小区3根静载试验已达极限承载力状态桩的试验曲线进行了拟合与预测误差分析,分析结果表明选择指数曲线预测模型更加符合该小区桩的承载力性状。然后采用指数曲线预测模型对该小区其它19根未达极限状态的试验和检测桩进行了拟合与预测,并建立了预测极限承载力、终止压力和桩长细比的关系公式,该极限承载力预测公式可以用于桩基施工时的承载力预测。The analysis on curve fittings and predicted results of three piles, which had reached the ultimate bearing capacity in static loading experiments, indicates small errors in predictions. The exponential curve fitting model can reflect the bearing capacity condition of the piles in this project. Fitting and predictions were carried out on other 19 experimental and testing piles, which did not reach the ultimate bearing capacity, in the same project. A function describing the ultimate bearing capacity, final pile static pressure and slenderness ratios was set up by analyzing their relations. This function can be utilized in the prediction of beating capacity during pile constructing.

关 键 词：小截面 静压预制桩 极限承载力 预测 终止压桩力 

分 类 号：TU473.13[建筑科学—结构工程]