U-shaped wall base and bottom plate dynamic and static separation bearing type lining structure with water delivering function

Abstract

The invention discloses a U-shaped wall base and bottom plate dynamic and static separation bearing type lining structure with a water delivering function in order to eliminate the effect of groundwater on a bottom structure of a tunnel lining, the problems of floating deformation of a tunnel inverted arch and cracking damage of the tunnel bottom structure in a karst or groundwater development area are effectively solved, and the stability and safety of tunnel construction and operation are guaranteed. Deep grooves are excavated in the two transverse sides of the bottom of a tunnel to form inverted-T-shaped tunnel bottom excavation faces; U-shaped wall base construction bodies with groove-shaped cavities are arranged in the deep grooves; the U-shaped wall base construction bodies are fixedly connected with the wall bottoms of the two side edges of arch wall secondary lining structures; and the U-shaped wall base construction bodies serve as bearing structures of the arch wall secondarylining structures and longitudinal drainage channels of the tunnel. Bottom plates are arranged in the positions, above the middles of the inverted-T-shaped tunnel bottom excavation faces, between theU-shaped wall base construction bodies on the two sides, and road beds are fixedly arranged on the bottom plates; settlement seams are arranged in the connecting positions of the two transverse endsof the bottom plates and the U-shaped wall base construction bodies on the two sides, so that a surrounding rock load transmitted by the arch wall secondary lining structures is separated from a trainload transmitted by the road beds.

Description

technical field [0001] The invention relates to a tunnel lining structure, in particular to a tunnel lining structure used in areas with developed groundwater, areas with irregular groundwater affected by seasons or karst areas. Background technique [0002] With the rapid development of high-speed railway construction, especially large-scale construction in southwest mountainous areas, on the one hand, due to the extensive distribution of limestone stratum; The constraints of the karst tunnels lead to a rapid increase in the scale (number and length) of karst tunnels. Due to the complexity, diversity and irregularity of the development of karst and karst water, the risks of building large karst tunnels, especially their operation, are getting higher and higher. In recent years, several water hazards such as ballastless ballast bed deformation, inverted arch and filling uplift have occurred during the operation of Yiwan, Shanghai-Kunming, Guiguang and other high-speed railw...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a U-shaped wall base and bottom plate dynamic and static separation load-bearing lining structure with the function of water delivery. By transforming the traditional tunnel lining tunnel bottom structure, the stress form and drainage of the tunnel bottom structure can be changed. The system eliminates the effect of groundwater on the bottom structure of the tunnel lining, effectively solves the problem of uplift deformation of the tunnel arch or cracking and damage of the tunnel bottom structure in karst or groundwater-developed areas, and ensures the stability and safety of tunnel construction and operation

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