Method of active heating, thermal insulation and protection against freezing of tunnels in high mountain areas thermal insulation layer electric heating Method of active heating, thermal insulation and protection against freezing of tunnels

Published on:

2023-04-01 16:58

Freezing damage often threatens construction and normal operation of tunnels in cold regions. In recent years, the low-temperature heating cable laying system has become widespread due to its unique advantages, among which the most common and fastest growing is the floor heating system, which needs to be used in airports, stadiums, and large residential areas in China. Electric radiant heating technology.

The electric heating system is a radiation heating system. An electric heating wire is used as a heat carrier. After the electrification of the heating cable, the electric energy is converted into thermal energy, which is transferred to the heated body, and the heat is stored, the outer layer of the thermal insulation material is used to meet the requirements of the heating and insulation effect. Heating cables generally consist of the following parts: heating wires, insulating layers, metal shielding layers, waterproof and anti-corrosion shells, etc. D., and the trunk cables also have metal-reinforced shells. It can be divided into two types: limited car port and self-limited type in terms of heating type. At present, the most commonly used electric heating tape is a self-regulating heating tape, and the resistivity of its heating element has a very high positive temperature coefficient. The electric heating system is a radiation heating system. An electric heating wire is used as a heat carrier. After the electrification of the heating cable, the electric energy is converted into thermal energy, which is transferred to the heated body, and the heat is preserved, the outer layer of the thermal insulation material is used to meet the requirements of the heating and insulation effect system. Heating cables generally consist of the following parts: heating wires, insulating layers, metal shielding layers, waterproof and anti-corrosion shells, etc. D., and the trunk cables also have metal-reinforced shells. It can be divided into two types: limited car port and self-limited type in terms of heating type. At present, the most commonly used electric heating tape is a self-regulating heating tape, and the resistivity of its heating element has a very high positive temperature coefficient.

In order to effectively avoid frost damage to the tunnel, the “heat insulation layer electric heating” system can be used at the entrance to the tunnel.

After a lot of tunnel thermal insulation and electric heating system test projects have been used, the thermal insulation and antifreeze method for the laying of thermal insulation layer and active heating of heating cable has high feasibility and efficiency.

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