港珠澳大桥强回淤水道软基沉管隧道节段接头结构处治问题研讨  

Exploration on Structural Treatment of Segment Joint of Immersed Tunnel of Hong Kong-Zhuhai-Macao Bridge Fixed Link Project with Serious Back Silting on Soft Ground Foundation

作　　者：孙钧[1,2] 

机构地区：[1]同济大学 [2]港珠澳大桥工程技术专家组

出　　处：《地下工程与隧道》2014年第1期1-5,共5页Underground Engineering and Tunnels

基　　金：中交规划院港珠澳大桥专题研究项目之一"港珠澳大桥岛隧工程深厚软基和大回淤条件下的地基与结构处理研究(阶段成果报告)"

摘　　要：在建的港珠澳大桥主体工程沉管隧道在日后长期运营过程中有可能面临十分可观而又分布很不均匀的水道回淤情况,容易导致深厚软基土产生较大沿隧道纵向的不均匀差异沉降。对隧道节段接头等部位的受力和变形以及如何合理调控沉管隧道管节内预应力值等问题进行了一些分析和探讨,并对可能采用的处治措施提出了若干优化建议。The immersed tunnel of Hong Kong-Zhuhai-Macao Bridge Fixed Link Project under construction will experience large amount of extremely uneven back silting in a long term operation,which is inclined to result in large uneven differential settlement of thick and soft ground foundation along the tunnel longitudinal direction. Analysis is made to the stress and deformation of tunnel segment joint and on how to reasonably control the prestress value of immersed segment. And some recommendations are proposed to optimize the possible treatment measures.

关 键 词：港珠澳大桥 沉管隧道管节接头 管段接头 回淤土 差异沉降 预应力筋 措施建议 

分 类 号：U457[建筑科学—桥梁与隧道工程] U459.5[交通运输工程—道路与铁道工程]