摘要
分析了大直径扩底桩的变形性状及扩径比对承载力的影响。对Charles提出的破坏准则进行改进,增加扩底比的影响,得到了确定大直径扩底桩极限承载力的方法。最后采用了5组大直径扩底桩的试验数据,对新方法的适用性进行验证,结果表明对于端承于土层的大直径扩底桩,该方法是有效的。
Deformation behavior of large-diameter bored piles and influence of the ratio of the enlarged tip diameter to the shaft diameter on the bearing resistance are analyzed.The failure criterion suggested by Charles is developed and the ratio of the enlarged tip diameter to the shaft diameter is added.Finally,the feasibility of calculating failure loads using the new criterion is verified with several representative piles test data.It is demonstrated that the new method is effective for large diameter belled piles in soil layer.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第S2期55-58,共4页
Chinese Journal of Geotechnical Engineering
基金
上海市重点学科建设项目(B308)
关键词
大直径扩底桩
扩径比
极限荷载
破坏准则
large-diameter belled pile
ratio of enlarged tip diameter to shaft diameter
failure load
failure criterion
