盾构掘进遇既有桥桩截桩桥梁防护应用研究  

Research on the Pile Cutting Bridge Protection Application When Shield Tunneling Encounters Existing Bridge Piles

作　　者：张昆 ZHANG Kun(China Railway Tunnel Group Co.,Ltd.,Guangzhou 511458,Guangdong,China)

机构地区：[1]中铁隧道局集团有限公司,广东广州511458

出　　处：《工程技术研究》2023年第4期108-110,共3页Engineering and Technological Research

摘　　要：随着城市地铁发展建设,地铁盾构区间隧道可能穿越各种既有桥梁桩基,地铁盾构隧道施工在穿越既有城市桥梁桩基时,必须确保新建地铁隧道工程自身结构安全,同时保证既有桥梁结构的安全。文章结合某地铁盾构区间隧道下穿桥桩基的具体情况,对该工程既有桥梁采取的施工技术方案进行分析,包括桩基托换、桥梁同步顶升及盾构掘进截桩施工的技术要点。通过对比、分析监测数据,证明采用该方法的可行性,为今后城市地铁区间盾构下穿既有桥梁桩基的施工提供参考。With the development and construction of urban subway,the subway shield interval tunnel may pass through various existing bridge pile foundations.When the subway shield tunnel construction passes through existing urban bridge pile foundations,it is necessary to ensure the structural safety of the new subway tunnel project and the safety of the existing bridge structure.Based on the specific situation of a subway shield interval tunnel undercrossing the bridge pile foundation,this paper analyzes the construction technical scheme adopted for the existing bridge of the project,including the technical points of pile foundation underpinning,bridge synchronous jacking and shield tunneling pile cutting construction.By comparing and analyzing the monitoring data,the feasibility of the method is proved,which provides reference for the construction of urban subway interval shield undercrossing the existing bridge pile foundation in the future.

关 键 词：盾构施工 既有桥桩 截桩 桩基托换 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]