Heating system for lining of tunnel opening section

Abstract

The invention discloses a heating system for the lining of a tunnel opening section, which includes a heating pipeline, a ground source heat pump and a heating pipeline, wherein the heating pipeline and the heating pipeline are all buried in the tunnel, and are respectively connected with the ground source heat pump to form a loop loop. The lining heating system at the entrance of the tunnel can completely eradicate the freezing damage of the tunnel, and the heat exchange tube of the ground source heat pump is buried between the primary lining and the secondary lining, replacing the underground drilling required by the traditional ground source heat pump buried pipe, and can also save some initial construction Investment, the heating pipe is buried between the second lining and the insulation layer. The invention is carried out synchronously with the tunnel construction, and can well control the construction quality of the heat exchange tubes. The invention makes full use of the energy-saving effect of the ground source heat pump, and can save 70% of later operation and maintenance costs compared with the traditional electric heating system. Compared with ordinary fuel boilers, there is no CO2 emission.

Description

technical field [0001] The invention belongs to the antifreeze and heat preservation of tunnels in cold regions, in particular to a lining heating system for tunnel openings. Background technique [0002] The freezing damage of railway and highway tunnels in cold regions is generally serious, leading to damage or even scrapping of the tunnel lining structure, seriously affecting the normal operation and safety of the tunnel. Tunnels in cold regions urgently need to solve the problem of freezing damage at the entrance section. [0003] At present, the antifreeze and heat preservation measures adopted by tunnels at home and abroad mainly include the technology of laying a certain thickness of thermal insulation layer on the outside of the second lining of the tunnel or between the second lining and the primary lining, the technology of installing cold and heat insulation doors at the entrance of the tunnel, and the use of electric boilers or fuel boilers. Tunnel ventilation a...

AI Technical Summary

Problems solved by technology

The defects of the above several technologies are as follows: firstly, in the case of no heat supply for tunnels in cold regions, the occurrence of frost damage in tunnels cannot be eradicated only by thermal insulation layer technology; secondly, cold-proof and thermal insulation doors are only suitable for tunnels with small traffic flow Thirdly, the use of electric boilers and fuel boilers for tunnel heating technology and the active antifreeze and heat preservation technology of tunnel wall buried heating cables can avoid the occurrence of tunnel frost damage, but these two technologies have high operation, maintenance and management costs and high energy consumption. , the fuel boiler will also cause some air pollution

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