工程桩抗拔检测技术应用研究  

Research on the Application of Engineering Pile Uplift Detection Technology

作　　者：夏文 张凡 张善硕 王倩妮 李攀[2] XIA Wen;ZHANG Fan;ZHANG Shan-shuo;WANG Qian-ni;LI Pan(Shenzhen Branch of China Construction Fourth Engineering Division Corp.Ltd,Shenzhen 518000;China Construction Fourth Engineering Division Corp.Ltd,Guangzhou 510000)

机构地区：[1]中国建筑第四工程局有限公司深圳分公司,深圳518000 [2]中国建筑第四工程局有限公司,广州510000

出　　处：《广州建筑》2024年第5期58-61,共4页GUANGZHOU ARCHITECTURE

摘　　要：为研究如何降低空桩段侧壁土体摩擦力对工程桩抗拔静载的影响,本文以某项目工程桩抗拔静载检测为例,设计出一种降低或排除空桩段侧壁土体摩擦力的“双护筒”检测装置,该装置充分考虑了空桩段侧壁土体摩擦力对抗拔静载实验数值的影响,在抗拔静载实验工程桩施工时,空桩段埋设双护筒,内护筒内采用与工程桩同标号的混凝土一起浇筑,内外护筒之间采用导向板进行分离,确保在进行抗拔静载实验检测过程中实验数据结果不受空桩段侧壁土体摩擦力的影响,提高了静载实验结果的准确性,使设计单位能更好地评判抗拔桩的承载能力,使上部主体结构的安全性更加有保证,同时也避免因空桩段侧壁土体摩擦力影响而将静载实验工程桩的桩身强度额外提高30%,节省了抗拔静载实验检测成本,取得了较好的经济效益和工期效益,具有较大的推广价值。In order to study how to reduce the influence of soil friction on the uplift static load of engineering piles in the sidewall of the empty pile section,this paper takes the uplift static load detection of engineering piles of a project as an example,and designs a"double casing"detection device that reduces or excludes the friction of the soil on the side wall of the empty pile section,which fully considers the influence of the soil friction on the side wall of the empty pile section on the uplift static load test value,and during the construction of the uplift static load experimental engineering pile,the double casing is buried in the empty pile section,and the concrete of the same grade as the engineering pile is poured together in the inner casing.The guide plate is used to separate between the inner and outer casing,so as to ensure that the experimental data results are not affected by the friction of the soil on the side wall of the empty pile section in the process of carrying out the uplift static load test detection,and the accuracy of the static load test results is improved,so that the design unit can better judge the bearing capacity of the uplift pile,so that the safety of the upper main structure is more guaranteed,and at the same time,the pile strength of the static load experimental engineering pile is increased by 30%due to the influence of the soil friction on the side wall of the empty pile section,and the cost of the uplift static load test is saved.It has achieved good economic benefits and construction period benefits,and has great promotion value.

关 键 词：工程桩抗拔检测技术 空桩段侧壁 土体摩擦力 双护筒 静载实验 

分 类 号：TU745.3[建筑科学—建筑技术科学]