Method and system for automatical antifreezing and thermal insulating of tunnel lining in high and cold areas

Abstract

The invention relates to a method and system for the automatical antifreezing and thermal insulating of a tunnel lining in high and cold areas. The method comprises the following steps that (1) a tunnel is provided with a surrounding rock, a primary lining, a waterproof plate, a secondary lining and a thermal preservation and thermal insulation layer sequentially from the outside to the inside; (2) a plurality of heating tubes are arranged, and refrigerant is sealed in the heating tubes; (3) the heating tubes are arranged between the secondary lining and the thermal preservation and thermal insulation layer along the length direction of the tunnel, the lower parts of the two ends of the heating tubes are buried in the surrounding rock below a tunnel pavement, so that the refrigerant is uniformly distributed on the lower parts of the two ends of the heating tubes; and the refrigerant continuously transfers heat from the surrounding rock below the pavement to the surface of the secondary lining through the circulation of ascending in a spontaneous vaporized gaseous state and descending in a condensation liquid state, and furthermore, the tunnel lining can be automatically prevented from being frozen and thermally insulated. Compared with the existing antifreezing and thermal insulating technology, the method has the advantages that the operating process does not consume any energy, the spontaneous vaporizing and condensing circulation of the refrigerant is utilized only, so that the tunnel lining can be automatically prevented from being frozen and thermally insulated; and moreover, the method is flexible in design, is convenient to construct and is low in cost.

Description

technical field [0001] The invention relates to an automatic antifreeze and heat preservation method and system for tunnel lining in alpine regions, and is particularly suitable for antifreeze and heat preservation of mountain tunnels. Background technique [0002] Highway and railway tunnels in high latitude and high altitude cold areas often suffer from freezing damage due to the intrusion of cold air in winter, such as lining leakage and icing, road overflow and icing, and lining peeling off. Freezing damage generally reduces the durability of tunnel lining concrete, which seriously affects the normal operation and safety of tunnels. Therefore, it is particularly important to prevent or treat frost damage in new or existing tunnels. [0003] At present, the passive antifreeze insulation measure widely used at home and abroad is to lay a certain thickness of thermal insulation layer on the surface of the second lining (or between the second lining and the waterproof board...

AI Technical Summary

Problems solved by technology

[0004] The deficiencies of the above-mentioned existing technologies are: in the alpine region, only passive antifreeze and heat preservation measures cannot eradicate the occurrence of tunnel frost damage (especially at the entrance section); and active antifreeze and heat preservation measures need to consume more energy ( Especially the direct heating heating method), its operation and maintenance costs are relatively high

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