Abstract The Yangtze River Tunnel is the first large-diameter tunnel located in the stratum of high water pressure and high water permeability, and the variation amplitude of channel scouring and silting on the left side has been very high over the years. Thus a reasonable structure type is one of the key considerations in the engineering design. Based on the single-layer segment lining and the full-ring double-layer lining, this paper proposes a new composite lining consisting of "segment and non-enclosed inner linings." Assuming no increase of the excavation diameter, construction of this structure can make full use of the space at the bottom of the circular tunnel and the two sides to cast reinforced concrete on site. The structure will form a non-enclosed secondary lining with the traffic lane slab, substantially reducing the lateral deformation of the structure and ensuring the water resistance of the key areas as well as the long-term stability of the structure.
Abstract：
The Yangtze River Tunnel is the first large-diameter tunnel located in the stratum of high water pressure and high water permeability, and the variation amplitude of channel scouring and silting on the left side has been very high over the years. Thus a reasonable structure type is one of the key considerations in the engineering design. Based on the single-layer segment lining and the full-ring double-layer lining, this paper proposes a new composite lining consisting of "segment and non-enclosed inner linings." Assuming no increase of the excavation diameter, construction of this structure can make full use of the space at the bottom of the circular tunnel and the two sides to cast reinforced concrete on site. The structure will form a non-enclosed secondary lining with the traffic lane slab, substantially reducing the lateral deformation of the structure and ensuring the water resistance of the key areas as well as the long-term stability of the structure.
XIAO Ming-Qing,
Deng-Chao-Hui,
Lu-Zhi-Peng
.A Study of the Structure Type of the Shield-Driven Section of the Yangtze River Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2012,V49(1): 105-110
2012, Vol. 49 