A grouting device for karst caverns at the bottom of cast-in-place piles

CN224451650UActive Publication Date: 2026-07-03CIVIL ENG OF CHINA CONSTR SECOND ENG BURESU

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CIVIL ENG OF CHINA CONSTR SECOND ENG BURESU
Filing Date: 2025-07-11
Publication Date: 2026-07-03

AI Technical Summary

Technical Problem

In existing grouting devices for karst caves at the bottom of cast-in-place piles, the threaded connection between the sealing steel pipe and the sealing cap makes disassembly and assembly cumbersome, and it is prone to leakage under high-pressure grouting conditions, resulting in material waste and environmental pollution. After long-term use, thread wear or corrosion exacerbates the risk of leakage.

Method used

The device employs a detachable connection structure, including components such as mounting base, positioning plate, and spring, to enable quick assembly and disassembly of the sealing steel pipe and the grouting device body. The sealing ring and sealing plate work together to ensure airtightness and prevent grout leakage.

Benefits of technology

It enables rapid installation and disassembly of sealing steel pipes and grouting devices, improving construction efficiency and quality, reducing equipment maintenance costs and environmental risks, ensuring sealing performance, and preventing grout leakage.

✦ Generated by Eureka AI based on patent content.

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Figure CN224451650U_ABST

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Abstract

This utility model relates to the technical field of grouting equipment for karst caves, specifically disclosing a grouting device for karst caves at the bottom of cast-in-place piles. It includes a grouting device body and a sealing steel pipe, as well as a mounting base and a positioning plate. Two sets of mounting bases are provided and installed on the outer sides of the grouting device body. A through groove is opened inside the mounting base. The sealing steel pipe is connected to the bottom of the grouting device body via a detachable connection structure. The detachable connection structure includes the mounting base and the positioning plate, with the positioning plate being "L"-shaped and inserted into the through groove of the mounting base. This device allows for quick disassembly and assembly of the sealing steel pipe from the grouting device body, providing convenience for workers, improving work efficiency, and simultaneously solving the problems of cumbersome disassembly and assembly and poor sealing of traditional threaded connections. This not only improves construction efficiency and quality but also reduces equipment maintenance costs and environmental risks.

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