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A Case Design of a Tunnel Passing Under an Adjacent Unlined Tunnel Designated As a Cultural property  

Kim, Seon-Hong (㈜유신코퍼레이션 터널부)
Jeong, Dong-Ho (㈜유신코퍼레이션 터널부)
Seok, Jin-Ho (㈜유신코퍼레이션 터널부)
Park, Myoung-Lyul (㈜유신코퍼레이션 터널부)
Publication Information
Tunnel and Underground Space / v.17, no.2, 2007 , pp. 152-164 More about this Journal
Abstract
Recently as increasing the amounts of cargoes and passengers, it is necessary to improving railway capacity and speed. So the constructions of improving the existing railway line have been advanced. Sometimes the new railway tunnel is built to adjacent the existing railway line. Furthermore the new tunnel might be built near the existing facility within the tunnel width. In this case, it should be analyzed the influence of existing tunnel and if it is necessary, it should be taken the appropriate counterplan. The major analysis contents are follows. One is the influence on the existing tunnel by a blasting and train vibration and the other is stability problem of the existing tunnel by excavation of new tunnel. Therefore, we peformed the following analysis. Refer to a domestic and foreign standard and paper, the permitting level of blasting vibration is decided and the excavation plan of the new tunnel are designed. The numerical analysis is performed about the stability of the existing tunnel and new tunnel. The influence of the train vibration on tunnel is analyzed by the empirical equation.
Keywords
Permitting level of blasting vibration; Train vibration; Existing tunnel;
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