Entity

Time filter

Source Type


Yang H.,Guangzhou Salvage Bureau of the Ministry of Transport | Xi X.,Shanghai JiaoTong University | Shen Y.,Shanghai JiaoTong University
Modern Tunnelling Technology | Year: 2013

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. Source


Yang H.,Guangzhou Salvage Bureau of the Ministry of Transport
Modern Tunnelling Technology | Year: 2013

The main types of temporary support systems in immersed tunnels are described (i.e. three-point support, four-point support, and five-point support) and a comparative analysis is carried out. The five-point support system was applied to the river-crossing tunnel of the East-West Expressway in Saigon, Vietnam, and its design and construction control are introduced in this paper. Research results and practice show that this five-point support system can ensure that the elements are supported by at least three points and guarantee element stability and accuracy under water, especially for a long immersed tunnel with enormous elements. Source


Wu C.,China Power Engineering Consulting Group Corporation | Hu D.,China Power Engineering Consulting Group Corporation | Zhang X.,Guangzhou Salvage Bureau of the Ministry of Transport
Sustainable Development of Critical Infrastructure - Proceedings of the 2014 International Conference on Sustainable Development of Critical Infrastructure | Year: 2014

The pump house of a coastal power plant, adopting a direct current water intake system, is located near the sea, with features of bulky volume, large embedded depth, complex design loads and difficult construction. Pump houses of the Shenzhen Eastern power plant were constructed by floating the caisson. Each caisson weighs 5000 tons and is 30.1 meters long, 19.2 meters wide, and 10.6 meters high. After caissons were prefabricated at a specialized dock, one of them was towed to a semi-submerged barge using airbags. It was then transported to a designated place for diving and fitted into position after floating. Shipping such a large-scale caisson from a dock to a semi-submersible barge is rare in China. Moreover, it may broaden design thought and provide a new construction method for other large pump houses of coastal power plants. © 2014 American Society of Civil Engineers. Source

Discover hidden collaborations