水容重对沉管隧道管段浮运沉放的影响及检测  

The Impacts and Testing of the Unit Weight of Water on Immersed Tunnel Element Floating and Immersion

作　　者：杨海涛 奚笑舟[2] 沈永芳[2] 

机构地区：[1]广州打捞局,广州510260 [2]上海交通大学交通工程研究所,上海200240

出　　处：《现代隧道技术》2013年第2期34-38,共5页Modern Tunnelling Technology

摘　　要：文章讨论了水容重在沉管隧道设计、建造和运营中对浮力计算与控制的影响,其中尤以对管段浮运沉放的影响最为关键;提出了应根据各工况的不同需求对水容重的变化加以监测,以及采用卡盖式取水器对水下水体进行取样,并以阿基米德原理测定水样容重的方法;最后介绍了水下水体取样及容重测定法在天津海河沉管隧道管段沉放中的应用情况及检测结果。This paper discusses the impacts of the unit weight of water on the calculation and control of buoyancy force in the design, construction, and operation of immersed tunnels, especially regarding the impacts on tunnel element floating and immersion. The variation of the unit weight of water should be monitored with consideration to the requirements of various construction cases. It is suggested that a covered water sampler should be used for underwater sampling, and the unit weight of water should be determined by the Archimedes principle. Finally, the application of this method in the immersion of the Haihe River Immersed Tunnel in Tianjin is presented.

关 键 词：沉管隧道 浮运沉放 水容重 浮力 采水器 

分 类 号：U455.46[建筑科学—桥梁与隧道工程]