超长钻孔灌注桩施工及承载试验研究
Construction and Bearing Test of Super-Long Bored Pile
戴湘波1
作者信息
- 1. 广东冠粤路桥有限公司,广州 511400
- 折叠
摘要
依托甘肃省某五跨预应力混凝土连续刚构桥开展软基成桩施工关键技术介绍,并且进行试验桩承载特性分析,研究结果表明,试验桩在设计承载荷载(6800 kN)具备 5.3 mm左右的桩顶竖向沉降,最大荷载(13700 kN)下的桩顶沉降达到了 27 mm,工后沉降稳定在 10 mm;试验桩轴力在顶部位置的变化幅度较大,随深度呈凸形;试验桩承载能力满足设计承载要求.
Abstract
Based on a five-span prestressed concrete continuous rigid frame bridge in Gansu Province,this paper introduces the key technology of soft foundation pile construction,and analyzes the bearing characteristics of the test pile.The research results show that the test pile has a vertical settlement of about 5.3 mm at the design bearing load(6800 kN),the pile top settlement under the maximum load(13700 kN)reaches 27 mm,and the post-construction settlement is stable at 10 mm;The axial force of the test pile changes greatly at the top position,and is convex with the depth;The bearing capacity of the test pile meets the design bearing requirements.
关键词
桥梁工程/超长钻孔灌注桩/承载能力Key words
bridge engineering/super long bored pile/carrying capacity引用本文复制引用
出版年
2023
NETL
NSTL
维普
万方数据