城市桥梁桩基托换设计关键技术

依托某高架桥梁桩基托换工程,从托换方式、旧承台与托换梁连接设计、顶升设计等桩基托换设计方面以及施工监控和风险源控制等方面,介绍了桥梁桩基托换设计的关键技术,并提出了将桩基托换、盾构施工和既有桥梁结构安全分析结合起来进行整体系统性分析研究的建议。

Key Design Techniques of Pile Foundation Underpinning for Urban Bridge

Depending on the engineering practice of pile foundation underpinning for an urban bridge,this paper introduces the key techniques of bridge pile foundation underpinning design from the aspects of the underpinning mode,connection design of old base slab with underpinning beam and jacking design as well as the construction supervision and the risk source control,and proposes the combination of pile foundation underpinning,shield construction and safety analysis on the existing bridge for the overall systematic analysis and study.