挤扩支盘桩在高速公路桥头软土地基处理中的应用  

Application of Squeezed Branch Pile in Soft Soil Foundation Treatment of Expressway Bridge Head

作　　者：吴晓龙 孙克强 林泽航 WU Xiaolong;SUN Keqiang;LIN Zehang(GuangdongChaoshan Loop Line Expressway Co.,Ltd.,Shantou Guangdong 515000)

机构地区：[1]广东潮汕环线高速公路有限公司,广东汕头515000

出　　处：《广东公路交通》2020年第4期57-60,66,共5页Guangdong Highway Communications

摘　　要：以广东潮汕环线高速公路西胪互通A匝道桥桥台软基处理为依托,对挤扩支盘桩地基加固开展了承载力验算、施工质量检测及路基沉降观测。结果表明:挤扩支盘桩地基处理满足地基承载力要求,设计方案合理,检测结果显示桩身完整性较好,施工质量满足要求,路基沉降量和差异沉降量均不大,约90%沉降量发生在施工过程中,路基沉降及工后沉降满足桥路过渡段沉降的要求,路基处于稳定状态,挤扩支盘桩的加固效果良好。Basing on the soft foundation treatment forramp bridgeabutment of Xi-Lu Interchange of Chao-Shan Ring Expressway in Guangdong Province,the bearing capacity checking,construction quality testing and subgrade settlement observation have been carried out for the foundation reinforcement with the squeezed branch pile.The results have shown that:the foundation treatment in the squeezed branch piles could satisfy the requirement of foundation bearing capacity with design scheme being reasonable.The testing results have shown that the pile body completeness are better,construction quality meets the requirements,both subgrade settlement and differential settlement amount are little large,about 90 percentage of settlement occur in the process of construction,subgrade settlement and postconstruction settlement meet the requirements of road bridge transition section settlement,the subgrade keep a stable condition,squeezed branch piles have a good strengthening effect.

关 键 词：软基处理 挤扩支盘桩 桩基检测 路基沉降 

分 类 号：U416.16[交通运输工程—道路与铁道工程]