Sealing device for goaf grouting

By using a sealing device with a pressurized system and an expansion sealing system in goaf grouting, the existing slurry stop plug has been solved, achieving a more efficient sealing effect and a wider range of application.

CN119663837APending Publication Date: 2025-03-21CHINA RAILWAY ENG CONSULTING GRP CO LTD
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Patent Information

Application Number
CN202411971566.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing conical slurry stopper plugs have poor sealing effect, especially under complex drilling conditions, which is prone to leakage of slurry or surface slurry, which cannot meet the high requirements for sealing of goaf grouting reinforcement.

Method used

A sealing device including grouting steel pipes, pressurization system, support system and expansion sealing system is adopted. Through the synergy of mechanical pressurization and expansion sealing system, close contact and sealing with the drilling wall is achieved.

Benefits of technology

It improves the sealing effect of grouting, solves problems such as lax sealing of slurry plugs and slurry on the surface, and is suitable for grouting drilling with different pore sizes, enhancing the reliability and scope of application of construction.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention provides a sealing device for goaf grouting, which relates to the technical field of foundation treatment and comprises a grouting steel pipe, a pressurizing system, a jacking system and an expansion sealing system. The grouting steel pipe is sleeved with the pressurizing system, and the pressurizing system is rotationally connected with the grouting steel pipe; the jacking system is arranged below the pressurizing system, and the jacking system is driven by the pressurizing system to expand outwards in the circumferential direction of the grouting steel pipe; and the expansion sealing system is arranged on the outer side of the jacking system, the side, away from the pressurizing system, of the expansion sealing system is fixedly connected with the grouting steel pipe, and the expansion sealing system expands under the action of the jacking system and makes contact with the peripheral drill hole wall to form a sealing state. The device can be tightly combined with the hole wall of the drill hole through mechanical pressurization, mechanical pressurization is reliable and convenient, the sealing effect of grouting is improved, the problems that a stop-grouting plug is not tight in hole sealing, ground surface grout mixing occurs and the like are solved, and the device can be suitable for grouting drill holes with different hole diameters.
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