水下明挖隧道临时围堰施工安全关键技术研究  

Research on Key Technologies for Temporary Cofferdam Construction Safety of Underwater Open-cut Tunnels

作　　者：赵宝根 ZHAO Baogen(China Design Testing Technology Co.,Ltd.,Nanjing 210014,Jiangsu,China)

机构地区：[1]华设检测科技有限公司,江苏南京210014

出　　处：《工程技术研究》2023年第17期41-44,共4页Engineering and Technological Research

摘　　要：水中临时围堰在桥梁工程施工中应用广泛,在隧道工程施工中应用较少,主要原因是跨越河流、湖泊和海洋等常采用桥梁方案、盾构隧道或沉管隧道方案。当采用水中围堰明挖隧道方案时,水文、地质和气象等方面存在许多不确定因素,会使围堰施工具有动态特征,水下明挖隧道临时围堰工程施工安全关键技术方面的经验相对缺乏。文章以工程实例进行分析,从钢板(管)桩围堰施工安全控制、围堰填土、抽水、拆除和围堰安全监测技术等方面提出了水下明挖特长隧道安全施工关键技术,可为将来类似工程施工提供参考。Temporary cofferdam in water is widely used in bridge engineering construction,but less used in tunnel engineering construction.The main reason is that bridge scheme,shield tunnel or immersed tunnel scheme are often used to cross rivers,lakes and oceans.There are many uncertain factors in hydrology,geology and meteorology when the underwater cofferdam open-cut tunnel scheme is adopted,which will make the cofferdam construction have dynamic characteristics.The experience on key technologies for temporary cofferdam construction safety of underwater open-cut tunnel is relatively lacking.Based on the analysis of engineering examples,this paper puts forward key technologies for safe construction of underwater opencut extra-long tunnel from the aspects of safety control of steel sheet(pipe)pile cofferdam construction,cofferdam filling,pumping,demolition and cofferdam safety monitoring technology,which can provide reference for similar engineering construction in the future.

关 键 词：水中围堰 钢板桩 钢管桩 

分 类 号：U455[建筑科学—桥梁与隧道工程]