深水双壁钢围堰配重及稳定性分析  

Counterweight and Stability Analysis of Deep-water Double-wall Steel Cofferdam

作　　者：余葵[1,2] 刘涛[1,2] 刘宪庆 刘阳[1,2] 吴威力 孟繁超 YU Kui;LIU Tao;LIU Xianqing;LIU Yang;WU Weili;MENG Fanchao(National Inland Waterway Improvement Engineering Research Center,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Bridge Navigation Safety and Collision Engineering Technology Research Center,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学国家内河航道整治工程技术研究中心,重庆400074 [2]重庆交通大学重庆市桥梁通航安全与防撞工程技术研究中心,重庆400074

出　　处：《广东水利水电》2022年第1期52-57,共6页Guangdong Water Resources and Hydropower

基　　金：重庆英才计划创新创业示范团队(编号:CQYC20193204)。

摘　　要：万州长江公路大桥防撞装置1#导向井采用深水圆形双壁钢围堰结构进行施工,受工程所处位置地质条件和大水位变幅影响,围堰稳定性不足,在围堰间采取注水注砂的方式进行配重,能增强其稳定性。文中建立了深水双壁钢围堰三维有限元模型,分析研究了不同配重方案下的围堰应力应变响应情况并进行现场监测。研究结果表明:环板间距分层注砂方案优于顶部贯通注砂方案,通过增加水平斜撑数量能有效降低构件应力。The 1#guide well of the anti-collision device of the Wanzhou Yangtze River Highway Bridge is constructed with a deep-water circular double-wall steel cofferdam structure.Due to the geological conditions of the project location and large water level variation,the stability of the cofferdam is insufficient.The cofferdam adopts the method of water injection and sand injection to carry out the counterweight,which can enhance its stability.A three-dimensional finite element model of a deep-water double-wall steel cofferdam was established,and the stress and strain response of the cofferdam under different counterweight schemes was analyzed and studied and on-site monitoring was carried out.The research results show that the ring-plate spacing layered sand injection scheme is better than the top through sand injection scheme;increasing the number of horizontal diagonal braces can effectively reduce the component stress.

关 键 词：双壁钢围堰 大水位变幅 注水注砂 稳定性 

分 类 号：U615.9[交通运输工程—船舶及航道工程]