砂土中齿桩抗拔特性模型试验研究  

Model Test on Pullout Resistance Characteristics of Multi-tooth Pile in Sand

作　　者：符羽佳 杜鹏[2,3] 张仰福 李光范[2] 曹志远 刘显阳 FU Yu-jia;DU Peng;ZHANG Yang-fu;LI Guang-fan;CAO Zhi-yuan;LIU Xian-yang(Power China Hainan Electric Power Design and Research Institute Co., Ltd., Haikou 571100, China;Yaha School of Built Environment, Haikou College of Economics, Haikou 571127, China;School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, China;Department of Civil Engineering, Hainan University, Haikou 570228, China)

机构地区：[1]中国电建集团海南电力设计研究院有限公司,海口571100 [2]海口经济学院雅和人居工程学院,海口571127 [3]长沙理工大学土木工程学院,长沙410114 [4]海南大学土木建筑工程学院,海口570228

出　　处：《长江科学院院报》2021年第11期121-126,共6页Journal of Changjiang River Scientific Research Institute

基　　金：海南省自然科学基金项目(520QN283);长沙理工大学公路养护技术国家工程实验室开放基金资助项目(kfj190109);海口经济学院校级科学研究课题(HJKY(YB)19-08)。

摘　　要：为研究齿桩的抗拔承载特性,开展了缩尺模型试验,针对齿部结构的层数与长度变量进行了11组试验研究。结果表明:齿桩相比光面桩表现出更优异的抗拔性能,齿距、齿长与模型桩的抗拉拔承载力都呈现正相关;在一定的弹性承载阶段,模型桩的抗拔承载力随着齿层数的增加呈线性增大;齿长相比于齿层数对模型桩的抗拔承载力和抗拔侧摩阻力均具有较大的影响。试验及分析结果对小改截面桩的研究运用具有一定的借鉴意义。To investigate the pull-out load-bearing characteristics of multi-tooth pile,we conducted scale model test of the tooth structure with varied number of tooth layer and tooth length.Our findings reveal that multi-tooth structure exhibits superior pull-out performance compared with smooth pile.Tooth pitch and tooth length are positively correlated with the pull-out bearing capacity of the model pile.At a certain elastic load-bearing stage,the pull-out bearing capacity of the model pile grows linearly with the increase of the number of teeth.Tooth length has a greater influence on the pull-out bearing capacity and the uplift side frictional resistance of the model pile than the number of teeth.The findings offer reference for the research and application of piles with small modified section.

关 键 词：桩基础 齿桩 抗拔特性 模型试验 小截面桩 

分 类 号：TU473.1[建筑科学—结构工程]