桥墩桩基础预压抬桩加固技术研究

Research of pre-compression lifting pile technology in bridge pier pile foundations

通过对桥梁桩基础抬桩加固的受力分析,研究通过传统的增补桩加固法无法有效地解决新旧桩之间应力转换的问题,提出利用预应力抬桩预压技术来有效的解决应力转换的问题。并介绍一种操作方便、工期短的施工方法,达到有效方便修复桥墩桩基础承载力不足的目的。

In this paper,based on the force analysis of bridge pile foundation in the process of lifting pile reinforcement,a pre-compression lifting piles technology was put forward to resolve effectively the problem of stress transforms,and a construction method together with its characteristic of convenience and speediness in operation and time limit respectively were introduced to strengthening the bridge pier pile foundations of insufficient bearing capacity.