微型桩抗拔特性原型试验研究  

Full Scale Tests on Uplift Capacity of Micro-piles

作　　者：魏鉴栋[1] 陈仁朋[1] 陈云敏[1] 魏有龙[1] 

机构地区：[1]浙江大学岩土工程研究所,杭州310027

出　　处：《工程勘察》2006年第8期14-19,共6页Geotechnical Investigation & Surveying

摘　　要：本文介绍了嘉兴软土地基中微型桩单桩和群桩的抗拔试验,试验表明微型桩能承受一定的抗拔力,尤其是斜桩基础能有效地减少竖向拉力引起的位移,微型桩群桩表现出更好的抗拔性能。该文将试验结果与现有抗拔桩承载力公式计算值进行了比较分析,探讨了微型桩直桩和斜桩的抗拔系数以及群桩效应系数,为其今后的工程设计和应用提供一定的参考。The full scale tests for the single micro-pile and micro-pile groups used in soft soil under uplift loading in Jiaxing are introduced. The testing results indicate that micro-piles can resist uplift loading. Especially, the angled micro-piles can decrease the displacement caused by uploading. The testing results for the uplift capacity of micro-piles are compared with the results from the calculation by using experienced formula, and the coefficient of the uplift for the vertical micro-piles and the angled piles and the coefficient of pile group efficiency are discussed.

关 键 词：微型桩 单桩 群桩 抗拔 群桩效应 

分 类 号：TU473[建筑科学—结构工程]