珠海斗门机场北快线下穿高速公路节点方案研究  

Research on Node Scheme of Zhuhai Doumen Airport North Express Undercrossing Expressway

作　　者：徐海俭 XU Haijian(Zhuhai Branch of Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Zhuhai 519000,Guangdong,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司珠海分公司,广东珠海519000

出　　处：《工程技术研究》2024年第18期168-170,191,共4页Engineering and Technological Research

摘　　要：文章以机场北快线下穿西部沿海高速公路节点为例,拟建机场北快线与现状西部沿海高速交叉,西部沿海高速为机场北快线下穿预留桥孔。拟建段地基为软基,该节点如处理不当,路基填筑会对现状桥墩施加侧向力,或工后沉降对桥墩施加负摩阻力。因此,制订合理经济的节点方案尤为重要。文章结合建设条件,提出多种下穿方案,推荐以路基形式下穿现状桥孔,并采用就地固化方式进行软基处理,该方案可为同类项目提供参考。Taking the node of airport north express undercrossing the western coastal expressway as an example,the proposed airport north express intersects with the current western coastal expressway,and the western coastal expressway reserves bridge holes for the airport north express.The foundation of the proposed section is soft foundation.If the node is not handled properly,the subgrade filling will exert lateral force on the current bridge piers,or the post-construction settlement will exert negative friction resistance on bridge piers.Therefore,it is particularly important to formulate a reasonable and economical node scheme.Combined with the construction conditions,a variety of undercrossing schemes are proposed.It is recommended to pass through the existing bridge holes in the form of subgrade,and use the in-situ curing method to treat the soft foundation.This scheme can provide reference for similar projects.

关 键 词：下穿方案 桩板结构 旱桥 软土 就地固化 

分 类 号：U416[交通运输工程—道路与铁道工程]