后压浆钻孔灌注桩竖向承载性能试验研究
Experimental Study on Vertical Bearing Capacity of Post-grouting Bored Pile
丘杭斌1
作者信息
- 1. 厦门建发建设运营管理有限公司,福建 厦门 361006
- 折叠
摘要
为了优化钻孔灌注桩的承载性能,文中以福建某建筑项目为例,对后压浆钻孔灌注桩竖向承载性能进行试验分析.结果表明,对钻孔灌注桩进行压浆处理后,桩顶极限位移降低30%,桩顶极限承载力降低13.9%,后压浆钻孔灌注桩的桩端压力、桩端阻力和桩侧阻力分别为未压浆钻孔灌注桩的1.9 倍、1.86 倍及 1.2 倍.这表明压浆技术能有效提升钻孔灌注桩的桩端承载力和桩侧阻力,降低钻孔灌注桩的沉降量,提升钻孔灌注桩的承载性能.
Abstract
In order to optimize the bearing capacity of bored pile,this paper takes a construction project in Fujian as an example to test and an-alyze the vertical bearing capacity of post-grouting bored pile.The results show that the ultimate displacement of pile top and ultimate bearing capacity of pile top are reduced by 30%and 13.9%after grouting treatment.The end pressure,end resistance and side resistance of post-grouting bored pile are 1.9 times,1.86 times and 1.2 times of that of ungrouting bored pile.The results show that grouting technology can ef-fectively improve the bearing capacity and side resistance of bored pile,reduce the settlement of bored pile,and effectively improve the bearing performance of bored pile.
关键词
钻孔灌注桩/后压浆技术/竖向承载性能/桩端轴力/桩侧阻力Key words
Bored pile/Post-grouting technology/Vertical bearing performance/Pile end axial force/Pile side resistance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据