Abstract For the long-term operation of large-span tunnels to be safe, challenging basic requirements are that the lining surface needs to be impermeable and watertight, the water drainage system needs to work well, and the surface of the filled concrete needs to stay dry without any hydrops, especially in the case of shallow overburden and unfavorable geological conditions. Based on the four-track station tunnel at the exit section of the new Wumengshan No. 2 tunnel from Liupanshui to Zhanyi of the Guizhou-Kunming railway, the key techniques for waterproofing and drainage of large-span tunnels with small and large overburdens are studied systematically, improvement measures for the waterproofing and drainage of shallow-buried tunnels are put forward, and the key points for construction quality management of waterproof sheets and drain pipelines are summarized.
Abstract：
For the long-term operation of large-span tunnels to be safe, challenging basic requirements are that the lining surface needs to be impermeable and watertight, the water drainage system needs to work well, and the surface of the filled concrete needs to stay dry without any hydrops, especially in the case of shallow overburden and unfavorable geological conditions. Based on the four-track station tunnel at the exit section of the new Wumengshan No. 2 tunnel from Liupanshui to Zhanyi of the Guizhou-Kunming railway, the key techniques for waterproofing and drainage of large-span tunnels with small and large overburdens are studied systematically, improvement measures for the waterproofing and drainage of shallow-buried tunnels are put forward, and the key points for construction quality management of waterproof sheets and drain pipelines are summarized.
.Key Construction Techniques for Waterproofing and Drainage of Large-Span Four-Track Railway Station Tunnels in a Soft Rock Mountain Area[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(2): 213-217
2017, Vol. 54 