Abstract:
Based on the construction practices of the Hujiawan Tunnel on the Lanzhou-Chongqing Railway, this paper summarizes the control points in the construction sequences of large-section tunnels on high-speed railways in terms of the water drainage system at the portal, slope excavation and protection, contruction of the guiding arch wall, tunnel body, waterproofing and draining, installation of the pipe-roof, primary support, and secondary lining.