Model tests on uplift capacity of double-belled pile influenced by distance between bells  

盘间距对双盘桩抗拔能力影响模型试验研究

作　　者：SUN Tao CUI Xin-zhuang SUN Yan-feng HAN Ruo-nan MA Rui-jin YANG Jun-jie WANG Yi-lin CHANG Yu-jun 孙涛;崔新壮;孙彦峰;韩若楠;MA Rui-jin;杨俊杰;王艺霖;常玉军(School of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;School of Civil Engineering,Shandong University,Jinan 250061,China;Shandong Yellow River Reconnaissance Design&Research Institute,Jinan 250013,China;University of Redlands,Redlands,California 92373,USA;School of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China;Ruiyuan Engineering Group Co.,Ltd.,Qingdao 266555,China)

机构地区：[1]School of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]School of Civil Engineering,Shandong University,Jinan 250061,China [3]Shandong Yellow River Reconnaissance Design&Research Institute,Jinan 250013,China [4]University of Redlands,Redlands,California 92373,USA [5]School of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China [6]Ruiyuan Engineering Group Co.,Ltd.,Qingdao 266555,China

出　　处：《Journal of Central South University》2022年第5期1630-1640,共11页中南大学学报（英文版）

基　　金：Project(51778346) supported by the National Natural Science Foundation of China;Project(2019GSF111007) supported by the Key Research and Development Project of Shandong Province of China;Project(ZR201808040034) supported by the Natural Science Foundation of Shandong Province of China;Project(2015RCJJ010) supported by the Talent Introduction Research Start-up Fund Project of Shandong University of Science and Technology,China。

摘　　要：To optimize the distance between the bells in pile design,this paper reports a series of small scale tests on the uplift capacity of double belled piles embedded in dry dense sand considering different bell space ratios.Finite element modelling is also performed to evaluate the range of soil failure around the piles during pile uplift displacement.Test results show that when bell space ratio is 6 or 8,the uplift capacity reaches the peak value.The upper bell bears more load than the lower one for the piles with bell space ratio less than 6,while the lower bell bears more load than the upper one for the piles with bell space ratio larger than 8.为优化设计盘间距,本文采用不同盘间距比值的双盘桩模型对其进行抗拔能力试验。使用有限元数值模拟对双盘桩上拔期间桩周土的破坏进行评价。试验结果表明,当盘间距比值为6或8时双盘桩的抗拔力达到峰值;当盘间距比值小于6时,上盘比下盘承担更多荷载;当盘间距大于8时,下盘承担更多荷载。

关 键 词：doubled-belled pile optimized distance uplift bearing capacity model test sand foundation 

分 类 号：TU473.1[建筑科学—结构工程]