Automatic water drainage and pressure reduction device and method for karst tunnel large cave under heavy rainfall condition

By installing an automatic water drainage and pressure reduction device with multi-stage filters and drainage pipes in the large karst caves, the problem of rising water pressure under heavy rainfall conditions has been solved, enabling the automatic, graded discharge of groundwater and protecting the structural integrity and safety of the tunnel.

CN116378752BActive Publication Date: 2026-05-01RES INST OF HIGHWAY MINIST OF TRANSPORT
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Patent Information

Application Number
CN202310339710.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-31
Publication Date
2026-05-01
Estimated Expiration
2043-03-31

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively manage the increased water pressure inside large karst caves under heavy rainfall conditions, leading to potential structural safety hazards in the tunnels. Furthermore, conventional drainage pipes are unable to drain large amounts of rainfall in a short period of time, which may trigger sudden water inrush accidents in the tunnels.

Method used

Design an automatic water drainage and pressure reduction device that includes a filtration mechanism, a cylindrical mechanism, and a drainage pipe. Through the combination of multi-stage filter screens and drainage pipes, the device can achieve graded automatic discharge of groundwater and avoid damage to the secondary lining structure of the tunnel.

Benefits of technology

Effective management of water pressure inside the tunnel protects the integrity of the tunnel structure, avoids local stress concentration, ensures tunnel safety, and prevents structural damage.

✦ Generated by Eureka AI based on patent content.
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Abstract

The application provides a karst tunnel large cave automatic water discharge pressure reduction device and method under heavy rainfall conditions, which comprises a filtering mechanism, the top end of the filtering mechanism extends into the cave, the bottom end of the filtering mechanism is connected with a cylindrical mechanism, the end of the cylindrical mechanism away from the filtering mechanism is fixedly connected with the top end of a tunnel mechanism, the high end of the cylindrical mechanism is connected with the inlet of a fine drain pipe, the outlet of the fine drain pipe is connected with the tunnel mechanism, the low end of the cylindrical mechanism is connected with a coarse drain mechanism, and the other end of the coarse drain mechanism is connected with the tunnel mechanism. On the one hand, the hydrogeological environment of the tunnel is not damaged, the underground water balance is protected, the automatic grading discharge of the cave underground water is realized, the water pressure outside the tunnel structure is reduced, the tunnel structure performance is protected, and the unreasonable stress of the tunnel structure caused by excessive water pressure is avoided to prevent the structure damage. On the other hand, the integrity of the secondary lining structure of the tunnel is not damaged, and the structure performance reduction caused by local stress concentration is avoided.
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