Abstract:

The construction organization and construction method of Guangdianyuan station and the neighbored largespanned tunnel and overlapped tunnels on No. 6 line of Chongqing Rail Transit System are presented in this paper. The construction of the subject works, which can only be accessed from two inclined shafts, is completed with high safety, high quality and high efficiency due to the rational construction organization and informationbased construction, which provides necessary conditions for the transfer of TBM. Double side drift method is used for the construction of the largespanned station and tunnels. Safety analysis is made on different construction conditions and safety evaluation is made on the construction parameters, which are further verified in the construction. A new sophisticated construction sequence is proposed for the overlapped tunnels. Controlled blasting technology is applied for the overlapped tunnels, which not only accelerates the construction speed, but also minimizes the influence among the overlapped tunnels.

Key words: mining method, large span, overlapped tunnel, controlled blasting, station transfer of TBM