桩基托换过程中桥梁保护及承载力验算研究

Research on bridge protection and calculation of bearing capacity in the process of pile foundation underpinning

随着城市轨道交通的快速发展,地铁隧道下穿地下空间所遇到的问题愈加频繁,本文结合武汉地铁彭司区间隧道下穿既有桥梁桩基的工程实例,首先介绍了工程概况及隧道与桥桩位置关系,然后简要概述了下穿桥梁桩基施工技术方案,综合考虑工程特点,提出六条全方位保护桥梁控制结构稳定的措施,并通过分析计算,验证桩基承载性能和满堂支架承载性能,提出有效工程应急措施。监测数据表明,桥梁结构稳定,说明了该方法的可行性及合理性,为类似工程提供参考与借鉴。

With the rapid development of urban rail transit,tunnels through underground space cause more and more problems.This paper combines the engineering example of tunnel crossing pile foundation.Firstly,the general situation of the project is introduced,and then the construction technical scheme of underpass pile foundation is summarized.Considering the characteristics of the project,six measures are put forward to protect the bridge in all directions and control the stability of the structure.Finally,the effective engineering emergency measures are given.The monitoring results show that the bridge is stable,which explains the feasibility and rationality of the method and provides reference for similar projects.