A dual-source heating and drainage antifreeze method for tunnel construction joints in cold regions

Abstract

The invention discloses a dual-source heating and drainage antifreeze method for construction joints of tunnels in cold regions. Two energy sources, hot gas and electric energy, are used to supply small-scale heating and drainage to drainage channels at construction joints. The hot gas and electric energy are used alone or in combination. Based on the drainable waterstop, this method uses two energy sources, hot air and electric energy, to heat and thaw tunnel construction joints in a small area, by section and by time, by setting dual-source heat supply pipes, so as to prevent drainage at the construction joints. The channel is frozen and blocked to achieve effective drainage, thereby avoiding freezing damage in tunnel construction joints in cold regions.

Description

technical field [0001] The invention relates to a dual-source heating and drainage anti-freezing method for underground engineering in cold regions, especially at construction joints of traffic tunnels. Background technique [0002] In tunnel and underground engineering, due to the frequent damage of the waterproof board during laying and operation, groundwater enters between the waterproof board and the secondary lining, and seeps through the weak links of the secondary lining structure, such as construction joints, expansion joints and Settlement joints (abbreviated as three joints), as well as cracks and loose parts of concrete, among which the leakage at the three joints accounts for more than 80%. In cold areas, when the temperature in the tunnel is below zero, the leaking part will freeze and cause various frost damage. [0003] Waterproofing and thermal insulation are currently the main methods to prevent frost damage in tunnels in cold regions. The common methods o...

AI Technical Summary

Problems solved by technology

The problems of using the insulation layer to prevent freezing are: (1) Under the action of the insulation layer, the tunnel waterproof and drainage system will inevitably freeze and then thaw, resulting in blockage of the tunnel arch foot drainage system during the spring thaw period, causing large-scale leakage of the arch ring; (2) ) The cost of the insulation layer is very high, and the construction quality requirements are very high. A little carelessness may cause partial failure of the insulation layer, and it will expand rapidly under the action of freeze-thaw cycles, resulting in complete failure; (3) The durability of the insulation layer is not ideal, High operating and maintenance costs

On the one hand, this comprehensive heating method is only suitable for tunnels close to urban areas that have heating conditions;

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