土工基础

›› 2015, Vol. 29 ›› Issue (3): 181-183.

• 工程实录 • 上一篇    下一篇

冲孔灌注桩竖向抗拔静载试验的探讨

胡如军,李 强,肖赣平   

  1. （深圳市南山区建设工程质量监督检验站，广东深圳 518067）
  • 收稿日期:2014-04-24 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:胡如军（1978-），男，工程师，研究方向为桩基检测。

Static Uplift Load Tests for the Percussively Formed Cast-in-Place Concrete Piles

HU Rujun，LI Qiang,XIAO Ganping   

  1. (Shenzhen Nanshan District Construction Project Quality Assurance and Inspection Station, Shenzhen 518067)
  • Received:2014-04-24 Online:2015-06-20 Published:2015-06-26

摘要： 针对某工程两根冲孔灌注桩竖向抗拔静载试验不满足设计要求，建议设计冲孔灌注桩单桩竖向抗拔承载力特征值应考虑泥浆护壁的影响，宜通过现场单桩上拔静载试验确定，进行后注浆可以改善桩周土体性能，提高单桩竖向抗拔承载力。

关键词: 冲孔灌注桩, 单桩竖向抗拔试验, 承载力特征值, 泥浆护壁, 后注浆

Abstract: The static uplift load tests on two percussively formed castinplace concrete piles indicated that the uplift resistance did not meet the design requirements. The uplift resistance estimation should consider the influence of the slurry in the pile installation, and the limit uplift resistance should be determined by the static load testing since the large variations of different estimation methods. The piles were post grouted and the uplift resistances are significantly improved.   

Key words: Percussively Formed CastinPlace Concrete Piles, Single Pile Static Uplift Loading Tests, Axial Uplift Capacity, Slurry for Borehole Stability, Post Grouting