温州瓯江北口大桥深厚淤泥层水域沉井抗台防护施工方案研究  

Research on Anti-typhoon Protection Construction Scheme for Open Caisson in Water Area with Deep Silt Layer of Oujiang Beikou Bridge in Wenzhou

作　　者：刘玲晶[1] LIU Lingjing(China Railway Major Bridge Engineering Group Co.,Ltd.,Wuhan 430050,Hubei,China)

机构地区：[1]中铁大桥局集团有限公司,湖北武汉430050

出　　处：《工程技术研究》2023年第3期80-82,共3页Engineering and Technological Research

摘　　要：温州瓯江北口大桥中塔沉井为国内首座在台风区域影响下穿越深厚软土的超大型水域沉井,需采用合理的抗台防护施工技术,以保障该项目的建设质量。文章从结构受力、工期、施工安全风险、经济性等方面综合比选,确定采用抛石措施作为沉井的抗台防护方案。同时通过试验数据及理论分析,确定了沉井在着床及下沉两阶段抛石厚度的最优方案。该项目成功抵御3次台风的事实证明:抛石抗台防护措施不仅实现了沉井平稳渡台的目标,同时抛石的“抱箍”效应对沉井起到了导向、定位作用,达到了在台风期间控制沉井姿态,确保工程质量安全的目的。The open caisson of the middle tower of Oujiang Beikou Bridge in Wenzhou is the first super-large open caisson in China that passes through deep soft soil under the influence of typhoon area. It is necessary to adopt reasonable anti-typhoon protection construction technology to ensure the construction quality of the project. In this paper, through comprehensive comparison and selection of structural stress,construction period, construction safety risk, economy and other aspects, the riprap measures are determined as the anti-typhoon protection scheme of open caisson. At the same time, through test data and theoretical analysis, the optimal scheme of riprap thickness in the two stages of implantation and sinking is determined. The fact that the project successfully resisted three typhoons has proved that the riprap anti-typhoon protection measures not only achieved the goal of the open caisson smoothly resisting typhoon, but also the "hoop" effect of the riprap played a guiding and positioning role in the open caisson, achieving the purpose of controlling the open caisson attitude during the typhoon and ensuring the quality and safety of the project.

关 键 词：深厚软土 水域沉井 抗台防护 抛石 

分 类 号：TV85[水利工程—水利水电工程] U445.557[建筑科学—桥梁与隧道工程]