摘要
港珠澳大桥沉管隧道施工过程中受回淤影响,制约了沉管安装的进度,为此后期制定了严格的清淤标准。文章汇总淤泥特性的研究成果以及港珠澳大桥、深中通道回淤特性试验研究进展,并以珠江口淤泥为试验原材,展开回淤特性试验,获得不同重度淤泥的物理特性及沉积特性,同时通过设计的试验系统,模拟沉管在回淤条件下的沉放过程,获得了沉放过程中淤泥对沉放模型产生的影响,在试验基础上提出沉管隧道碎石基床回淤特性的研究思路。
During the construction process of the Hongkong-Zhuhai-Macao Bridge immersed tube tunnel,the process of the immersed tube installation was restricted by the back-silting,so strict desilting standard was established in the later stage.We summarized the research results of silting characteristics and the experimental study process of silting characteristics of Hongkong-Zhuhai-Macao Bridge and Shenzhen-Zhongshan Bridge.Taking Pearl River Estuary silt as the test raw material,we carried out the back-silting characteristics test to obtain the physical characteristics and deposition characteristics of different heavy silt.At the same time,through the designed test system,the sinking process of immersed tube under the condition of back-silting was simulated,and the influence of silt on the sinking model was obtained.Based on the test result,a research approach about the back-silting characteristics of the gravel foundation bed of the immersed tube tunnel was proposed.
作者
张乃受
李一勇
李增军
胥新伟
郑爱荣
ZHANG Nai-shou;LI Yi-yong;LI Zeng-jun;XU Xin-wei;ZHENG Ai-rong(CCCC First Harbour Engineering Co.,Ltd.,Tianjin 300461,China;Tianjin Enterprise-based Key Laboratory of Construction,Operation and Maintenance Technologies for Underwater Tunnels,Tianjin 300222,China;CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China)
出处
《中国港湾建设》
2020年第5期29-34,共6页
China Harbour Engineering
关键词
沉管隧道
回淤
淤泥重度
浮泥
流泥
immersed tube tunnel
back-silting
unit weight of mud
floating mud
quick mud
作者简介
张乃受(1972—),男,河北衡水人,工程硕士,高级工程师,从事工程技术管理工作。E-mail:zhangnaishou@ccccyhj.com。