摘要
针对目前在抗拔桩设计中对嵌岩桩承载力影响因素理解不足,导致桩基设计不合理的问题,采用离心机模型试验,研究嵌岩深度、岩土体性质和桩型对桩基极限抗拔承载力的影响。研究结果表明:等截面桩极限抗拔承载力随嵌岩深度的增加呈近线性增加,扩底桩极限抗拔承载力呈非线性增加;较软岩与软岩比较,扩底桩极限抗拔承载力增幅超过200%;扩底桩极限抗拔承载力高于等截面桩88.7%～95.2%。
At present,the factors influencing the bearing capacity of rock-socketed piles are not well understood in the design of uplift piles,which leads to the unreasonable design of pile foundations.To solve this problem,centrifuge model test was used to study the influence of rock-socketed depth,rock and soil properties,pile types on ultimate uplift capacity of piles.The results show that the ultimate uplift capacity of even section piles increases linearly with the increase of rock-socketed depth,and the ultimate uplift capacity of belled piles increases nonlinearly.Compared with soft rock and more soft rock,the ultimate uplift capacity of belled piles increases by more than 200%.The ultimate uplift capacity of belled piles is higher than that of even section piles by 88.7%~95.2%.
作者
杨柏
马建林
周和祥
孙珍茂
董晓朋
YANG Bai;MA Jianlin;ZHOU Hexiang;SUN Zhenmao;DONG Xiaopeng(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Sichuan Electric Power Design & Consulting Co.,Ltd,Chengdu 610016,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2019年第1期85-91,共7页
Journal of Railway Science and Engineering
基金
国家重点研发计划资助项目(2016YFC0802203-1)
关键词
嵌岩桩
极限抗拔承载力
影响因素
离心模型试验
rock-socketed piles
ultimate uplift capacity
influencing factors
centrifuge model test
