城市组合立交施工对既有地下结构的影响及保护研究  

作　　者：纪彦飞[1] 

机构地区：[1]中铁一局集团有限公司,西安710000

出　　处：《科技创新与应用》2025年第9期156-159,共4页Technology Innovation and Application

摘　　要：随着国内各大城市的快速发展,现代城市交通矛盾日益突出,修建城市组合立交已成为解决城市交通问题的有效途径之一。受到道路铁路、地下管线和建筑物等环境设施的限制,城市中心城区的立交大多不具备立交桥梁施工条件而采用明挖法或下穿顶进法施工。由于城市的快速发展,对地下空间的开发利用大大增加,地铁车站、盾构隧道等地下交通结构纵横交错。该立交桥梁地下暗埋部分与既有地铁线路邻近,为保护既有地铁区间结构使用安全,采用双排桩防护,地下注浆加固,外拉锚等施工工艺进行暗埋部分结构的施工,使用有限元软件对结构受力分析,有效保证既有地铁结构的使用安全,大大提高新建结构的施工质量和安全性。With the rapid development of major cities in China,modern urban transportation contradictions have become increasingly prominent.Building urban composite interchanges has become one of the effective ways to solve urban transportation problems.Due to the limitations of environmental facilities such as roads and railways,underground pipelines and buildings,most interchanges in the central Urban area of the city do not have the construction conditions of overpass bridges and are constructed using the open-cut method or the under-penetrating and jacking method.Due to the rapid development of the city,the development and utilization of underground space has been greatly increased.Underground transportation structures such as subway stations and shield tunnels are crisscrossed.The underground buried part of the overpass bridge is adjacent to the existing subway line.In order to protect the safety of the existing subway section structure,construction techniques such as double row pile protection,underground grouting reinforcement,and external tension anchors are used to construct the buried part of the structure.Finite element software is used to analyze the stress of the structure,which effectively ensures the safety of the existing subway structure.It has greatly improved the construction quality and safety of new structures.

关 键 词：双排桩 下穿顶进法 外拉锚 注浆加固 应力分析 

分 类 号：U416.04[交通运输工程—道路与铁道工程]