厦门地区预制中短管桩抗压承载力统计分析  

Statistical analysis of compressive bearing capacity of short prefabricated concrete piles in Xiamen area

作　　者：张添文 Zhang Tianwen(Fujian Academy of Construction Sciences Inspection and Testing Co.,Ltd,Xiamen 361006,China;Fujian Provincial Key Laboratory of Green Building Technology,Fuzhou 350025,China;Fujian Provincial Institute of Building Science and Technology Co.,Ltd,Fuzhou 350025,China)

机构地区：[1]福建省建科院检验检测有限公司,福建厦门361006 [2]福建省绿色建筑技术重点实验室,福州350025 [3]福建省建筑科学研究院有限责任公司,福州350025

出　　处：《工程勘察》2024年第3期29-37,共9页Geotechnical Investigation & Surveying

摘　　要：本文收集了厦门地区27根φ500预制中短管桩(桩长为4.9~14.8m,桩端持力层为黏性土—强风化花岗岩)的抗压静载试验结果,采用极差法、修正箱线图法和勘察规范统计法对27根桩的抗压极限承载力分九种情况进行了归纳分析与统计,得出了预制中短管桩桩长宜按15m界定,其对应的短桩效应承载力折减经验系数为0.84等具有实际应用价值的经验参数,同时也剖析了极差法、修正箱线图法和勘察规范统计法的优缺点。The compressive static load test results of totally 27 nos.prefabricated concrete piles with 500mm diameter and 4.9~14.8m length are collected in Xiamen area,which are founded in cohesive soil or strong weathered granite.The range analysis method,modified box diagram method and statistical method in the ground investigation standard are used to analyze the ultimate compressive bearing capacity of the 27 piles in nine types.It is concluded that the length of short prefabricated pile should be defined as 15m,and the corresponding empirical reducing coefficient for the bearing capacity of the short pile effect is 0.84;at the same time,the advantages and disadvantages of the range method,modified box diagram method and the statistical method in the ground investigation standard were analyzed.

关 键 词：预制中短管桩 抗压极限承载力 试设比 极差法 修正箱线图法 勘察规范统计法 短桩效应承载力折减经验系数 

分 类 号：TU473.1[建筑科学—结构工程]