Underwater demolition method for vertical shaft gate of hydropower station under deep water condition

CN122236083APending Publication Date: 2026-06-19CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD
Filing Date
2026-04-23
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

The vertical shaft gates of hydropower stations are difficult to dismantle safely and effectively in deep water conditions. Existing methods, such as blasting, affect the structure of the cavern, while manual underwater cutting is limited to shallow water areas, and there is a lack of systematic solutions.

Method used

By controlling the water level during construction, building a surface work platform, developing a diving plan, inspecting and clearing the construction passage, and adopting layered cutting and hoisting methods, the safety of divers was ensured and the difficulty of the operation was reduced.

Benefits of technology

Creating a safe and controllable working environment in deep water conditions reduces physiological risks, improves cutting and hoisting efficiency, avoids damage to the cavern structure, enables systematic demolition, and reduces difficulty.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a method for underwater dismantling of a hydropower station shaft gate under deep-water conditions, comprising: controlling the water level during construction; constructing a surface work platform based on the water level during construction, calculating the diving time and depth, and developing a diving plan based on the calculated diving time and depth; inspecting and clearing the construction passage to ensure its unobstructed access; and cutting and hoisting the gate. This invention can solve the problem of the difficulty of underwater dismantling of existing hydropower station shaft gates under deep-water conditions.
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