Inverted arc layer buried geothermal anti-freezing heating system of energy tunnel

Abstract

Provided is an inverted arc layer buried geothermal anti-freezing heating system of energy tunnel. The system comprises a tunnel heat exchange section and a tunnel heating section. In the tunnel section corresponding to the tunnel heat exchange section, a heat exchange layer is placed between the tunnel inverted arc and a refilled layer. A first inlet water hole is communicated with a first water feeding pipe. A first outlet water hole of the heat exchange layer is communicated with a first return water pipe. The first water feeding pipe and the first return water pipe are both connected with the front end of a heating pump to form heat exchange circulation pipeline. In the tunnel section corresponding to the tunnel heating section, a heating layer is placed both between a tunnel primary liner and a tunnel secondary liner, and between a road surface and the refilled layer. A second inlet water hole of the heating layer is communicated with a second water feeding pipe. A second return water hole is communicated with a second water return pipe. Both the second water feeding pipe and the second water return pipe are connected with the rear end of the heating pump to form a heat circulation pipeline. The system has the advantage of having good adaptability and high efficiency of heat exchange, saving cost and shortening construction cycle.

Description

technical field [0001] The invention relates to the field of tunnel surrounding rock, in particular to a buried geothermal energy antifreeze heating system for an energy tunnel invert, which is suitable for extracting geothermal energy from the surrounding rock behind the tunnel lining and in the lower part of the invert in areas where groundwater is underdeveloped and underdeveloped, and is used for The pavement and lining of the tunnel are heated. Background technique [0002] In recent years, with the rapid development of my country's traffic construction, the number of tunnels in cold regions is increasing day by day, but the problem of frost damage in tunnels in cold regions has become increasingly prominent. Soon after some newly-built tunnels were put into use, large-scale frost damage occurred, which seriously affected tunnel traffic safety. . A survey of road tunnels in cold regions that have been in operation found that more than 80% of the tunnels in cold regions ...

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Problems solved by technology

[0005] In order to overcome the fact that the existing geothermal water collection technology in the surrounding rock of the tunnel cannot be applied to areas with underdeveloped and undeveloped groundwater, and the geothermal energy in the surrounding rock at the lower part of the inverted arch cannot be extracted; although the technology of laying heat exchange pipes is not limited by the development of groundwater, However, the heat exchange tube is a linear heat source, its heat exchange capacity is limited, and the laying of the heat exchange pipeline will increase the construction cost of the project. Energy Tunnel Invert Layer Buried Geothermal Energy Antifreeze Heating System

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