深水裸岩地质圆形锁扣钢管桩围堰设计与施工关键技术  

Key techniques of design and construction of circular interlocking steel pipe pile cofferdam for deep water bare rock geology

作　　者：蔡高峰 张世淦 褚松 曾诗烨 CAI Gaofeng;ZHANG Shigan;CHU Song;ZENG Shiye(Fifth Engineering Co.,Ltd.,China Railway Major Bridge Engineering Group,Jiujiang 332001,China)

机构地区：[1]中铁大桥局集团第五工程有限公司,江西九江332001

出　　处：《中国高新科技》2025年第4期146-149,共4页

摘　　要：洪州大桥主桥为120+252+120m双塔双索面自锚式悬索桥,主墩横向设置两个六边形独立承台,墩位处覆盖层较浅,薄厚层状构造,泥质结构,岩石质软,岩石遇水易软化,失水易干裂。该桥主塔承台采用了圆形锁扣钢管桩围堰施工,围堰内部仅设置圈梁。承台可一次性浇筑,塔吊、电梯等设施安装受制约小。圆形锁扣钢管桩具有用钢量少、施工速度快、施工操作空间大等优点,可为后续类似地质条件下的桥梁基础施工提供有益借鉴。The main bridge of Hongzhou Bridge is a 120+252+120m double-tower,double-cable self-anchored suspension bridge.The main pier consists of two hexagonal independent pile caps placed transversely.The overburden at the pier site is shallow,thin layered structure,muddy structure,and the rock is soft,prone to softening when exposed to water and drying out and cracking when dehydrated.The pile cap of the bridge’s main tower utilizes a circular interlocking steel pipe pile cofferdam,with only a ring beam installed inside the cofferdam.The pile cap can be complete in a single casting,with minimal restrictions on the installation of facilities such as tower cranes and elevators.The circular interlocking steel pipe piles offer advantages such as reduced steel usage,faster construction speed,and a large operational space.These characteristics provide valuable insights for future bridge foundation construction in similar geological conditions.

关 键 词：深水裸岩 圆形围堰 锁扣钢管桩 设计 施工技术 

分 类 号：U416[交通运输工程—道路与铁道工程]