2013, Volume 15, Issue 12
Strategic Study of CAE >> 2013, Volume 15, Issue 12
The location choice and construction technology of shafts in Bohai Strait tunnel
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
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Abstract
Bohai Strait tunnel is an important part of the national railway network and the highway;the construction of the crossing is significant. Based on the whole tunnel scheme of Bohai Strait, the location choice and construction technology of shafts in Bohai Strait subsea tunnel were researched in this paper. Through the analysis of the tunnel boring machine (TBM) life, Beihuangcheng Island and Beichangshan Island were selected as the locations for two shafts; and through the calculations of construction and operation ventilation and the research of the island sites,the feasibility of the shaft location choice scheme was demonstrated. According to the construction technology analyses of shafts in mine, railway tunnel and road tunnel,a molding method of drilling and blasting was used to construct the Bohai Strait tunnel shaft; the main measure of the construction of shaft topsoil should be plugging; the main technology program of the construction of base rock section should take the reasonable crack grouting technology.
Keywords
subsea tunnel ; shaft ; ventilation ; construction technology
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