海上大跨桥梁沉井设置基础施工技术研究  

Research on Foundation Construction Technology for Caisson Setting of Long-Span Bridges over the Sea

作　　者：闫少敏 冯长亮 刘爽 YAN Shao-min;FENG Chang-liang;LIU Shuang(Tianjin Institute of Transportation Sciences,Tianjin 300300,China)

机构地区：[1]天津市交通科学研究院,天津300300

出　　处：《中国市政工程》2025年第2期119-123,152,共6页China Municipal Engineering

摘　　要：该研究以甬舟高速公路西堠门公铁两用大桥4号墩深水沉井基础为工程背景,针对海上4号墩深水裸岩沉井设置基础的技术特点,分别从沉井加工、整体浮运、定位、水下爆破基坑整平,下沉,沉井内混凝土浇筑等施工技术进行研究。针对海上风大浪急、深水裸岩环境对施工产生的不利影响进行了相应环境荷载计算及分析,较为详细地介绍了沉井基础施工的关键技术与施工步骤。该研究对类似的海上裸岩深水沉井设置基础工程项目具有参考价值。This study takes the deepwater caisson foundation of Pier No.4 of the Xihoumen Railway-Road Bridge on the Ningbo-Zhoushan Expressway as the engineering background.Focusing on the technical characteristics of the deepwater bare rock caisson foundation for Pier No.4 at sea,the study investigates the construction techniques involved in caisson fabrication,overall floating transportation,positioning,underwater blasting for foundation leveling,sinking,and concrete pouring inside the caisson.Corresponding environmental load calculations and analyses are conducted to address the adverse effects of strong winds and high waves in the deepwater bare rock environment on construction.The key technologies and construction steps of the caisson foundation are introduced in detail.This study provides valuable references for similar projects involving the construction of deepwater bare rock caisson foundations for bridges.

关 键 词：公铁两用大桥 斜拉-悬索协作体系桥 深水基础 沉井 基础设计 

分 类 号：U445.55[建筑科学—桥梁与隧道工程]