基于静载加卸载数据的管桩承载力影响因素分析  

Analysis of Factors Affecting the Bearing Capacity of Pipe Piles Based on Static Loading and Unloading Data

作　　者：何高峰 李锦辉 汪四新 HE Gaofeng;LI Jinhui;WANG Sixin(Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;Shenzhen Institute of Building Research Co.,Ltd.,Shenzhen 518049,China)

机构地区：[1]哈尔滨工业大学(深圳),深圳518055 [2]深圳市建筑科学研究院股份有限公司,深圳518049

出　　处：《结构工程师》2023年第4期146-150,共5页Structural Engineers

基　　金：国家重点研发计划资助项目(2019YFB2102703)。

摘　　要：如何充分挖掘并利用静载试验数据,对于确定桩基承载力具有重要的意义。选取深圳某场地36根管桩静载数据,对比分析了只利用加载数据及加、卸载曲线同时考虑这两种情况,得出最后一级加载数据和第一级卸载数据占有最大权重的结论,和规范桩基承载力的确定方法一致,也反映了桩基压缩性能。上述结论为进一步利用加卸载曲线分析桩身性状、单桩沉降及承载力计算提供了数据支撑和科学依据。How to fully excavate and utilize the static load test data is of great significance.This paper selects the static load data of 36 pipe piles in one site in Shenzhen,and compares and analyzes two cases where only the loading data and both the loading and unloading curves.It draws the conclusion that the last level of loading data and the first level of unloading data have the largest weight,which is consistent with the method in the regulations,and also reflection of the compressive performance.The results provide data support and scientific basis for further analysis of pile body properties,single pile settlement and bearing capacity using both loading and unloading curves.

关 键 词：桩基承载力 卸载曲线 主成分分析 

分 类 号：TU473.1[建筑科学—结构工程]