单桩竖向极限承载力不确定性分析  

Research on Uncertainty Analysis of Vertical Ultimate Bearing Capacity of Single Pile

作　　者：庄伟杰 Zhuang Weijie(Fujian University of Technology Geotechnical Engineering Research Institute Co.Ltd.,Fuzhou,Fujian 350008)

机构地区：[1]福建工大岩土工程研究所有限公司,福建福州350008

出　　处：《江西建材》2023年第5期120-122,共3页Jiangxi Building Materials

摘　　要：单桩竖向极限承载力是结构稳定性的基础,因此,极限承载力检测准确性是结构安全的保障。文中结合实例,论述了慢速维持荷载法缓变型承载力检测方式,结合实测Q-s和s-lgt曲线,给出了单桩基础的极限承载力结果。针对慢速法缓变型承载力检测方法的不确定性,给出了该检测方法误差公式,结合Q-s曲线斜率分布给出了不同承载力结果误差。该方法对单桩竖向极限承载力结果可靠性评估提供了参考。The vertical ultimate bearing capacity of a single pile is the foundation of structural stability,so the accuracy of ultimate bearing capacity testing is a guarantee of structural safety.This paper discusses the method of slowly varying bearing capacity testing using slow sustained load method with examples,and gives the ultimate bearing capacity results of single pile foundations based on the measured Q-s and s-lgt curves.Aiming at the uncertainty of the slowly varying bearing capacity testing method using the slow speed method,the error formula of the testing method is given,and the error of different bearing capacity results is given based on the slope distribution of the Q-s curve.This method provides a reference for the reliability evaluation of the vertical ultimate bearing capacity of a single pile.

关 键 词：单桩承载力 Q-S曲线 不确定性 误差分析 斜率分布 

分 类 号：TU13[建筑科学—建筑理论]