A geothermal utilization system for emergency parking strips of deep-buried highway tunnels in high-cold areas and its construction method

By drilling U-shaped heat exchange pipes in the sidewall drilling holes of the emergency parking belt deep in highway tunnels in high-altitude areas, a geothermal utilization system is formed, which solves the problems of construction difficulties and geothermal loss in the existing technology, and achieves efficient and economical utilization of geothermal resources.

CN118622367BActive Publication Date: 2025-03-28CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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Patent Information

Application Number
CN202410763280.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-13
Publication Date
2025-03-28
Estimated Expiration
2044-06-13

AI Technical Summary

Technical Problem

The prior art system for extracting surrounding rock geothermal in deep buried road tunnels in high-altitude areas has construction difficulties and structural influences, and geothermal heat dissipates rapidly, reducing geothermal utilization efficiency.

Method used

The side wall of the emergency parking belt is drilled to collect heat in the same direction as the tunnel driving direction, and a U-shaped special heat exchange PE pipe is buried. The geothermal utilization system consisting of a heat extraction unit, a transmission pipeline, a heat exchange unit and a heating unit are realized efficiently extracting and utilizing geothermal resources.

Benefits of technology

The system is simple to construct and has high economicality. It can effectively extract the geothermal heat of the surrounding tunnel rock, reduce heat dissipation losses, improve geothermal utilization efficiency, and have a small impact on the tunnel structure.

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Abstract

The present invention belongs to the technical field of geothermal utilization in tunnels in high-cold areas, and in particular, relates to a geothermal utilization system for emergency parking strips in deep-buried highway tunnels in high-cold areas. The deep-buried highway tunnel is a tunnel longer than 1,000 meters, and the geothermal utilization system includes a heat extraction unit, a transmission pipeline, a heat exchange unit, a heating unit, and a heating air unit; the heat extraction unit and the heat exchange unit are connected by a transmission pipeline, and the heating unit is connected to the heat exchange unit; the heat extraction unit is located on the side walls of the area where the emergency parking strip is located, and the side walls are perpendicular to the driving direction in the deep-buried highway tunnel; the high-temperature fluid in the total water inlet pipe of the heating unit is transported to the water inlet branch of the heating unit; the heating air unit includes an air inlet pipe, an air outlet pipe, and a heat exchange pipe in the heat exchange unit, and the middle part of the heat exchange pipe is a bellows-shaped air bag, and the heat exchange pipe exchanges heat with the fluid in the heat exchange unit. The system has the advantages of high utilization rate, good stability, cleanliness, environmental protection, and easy construction.
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