A dual-purpose grouting pipe and grouting head for anchor cable grouting

By designing a dual-purpose PVC grouting pipe and grouting head, the problems of inadequate sealing of secondary grouting pipes and insufficient grouting pressure in complex strata are solved, achieving efficient and high-pressure grouting, and improving anchoring quality and construction efficiency.

CN224431437UActive Publication Date: 2026-06-30SHENZHEN INVESTIGATION & RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHENZHEN INVESTIGATION & RES INST
Filing Date
2025-05-30
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the existing anchor cable grouting process, the end of the secondary grouting pipe is not properly sealed, which causes cement grout to enter the secondary grouting pipe, making it impossible to complete high-pressure grouting. In addition, the grouting pressure is insufficient in complex strata, affecting the structural strength of the grout in the anchoring section and the bonding with the rod.

Method used

The system employs a dual-purpose PVC grouting pipe and grouting head, including a bottom sealing plug, a bottom grout one-way valve, multiple rubber sealing rings, and a rubber sleeve. This ensures that the grout from the first grouting does not enter the secondary grouting pipe. Furthermore, the high-strength PVC material and sealing design meet the requirements for high-pressure grouting, reducing the number of grouting pipes required and improving construction efficiency.

Benefits of technology

It effectively prevents the primary grout from clogging the secondary grouting pipe, meets the pressure requirements of high-pressure and splitting grouting, improves the anchoring quality, reduces the impact on the strength of the grout structure and the bonding of the rod, and improves construction efficiency and reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a dual-purpose grouting pipe and grouting head for anchor cable grouting in the field of geotechnical engineering construction. It includes a PVC dual-purpose grouting pipe, a dual-purpose grouting head, and an in-pipe cement slurry washing head. The PVC dual-purpose grouting pipe includes a grouting pipe body, a grouting pipe hole bottom sealing plug at one end of the grouting pipe body, and a hole bottom slurry one-way valve fixedly connected to the inner hole of the grouting pipe body at one end of the grouting pipe hole bottom sealing plug. The dual-purpose grouting head is disposed in the inner hole of the PVC dual-purpose grouting pipe. This utility model employs a one-way valve and sealing clamps to effectively prevent primary grout from entering the secondary grouting pipe, avoiding blockage. Simultaneously, it effectively reduces the number of grouting pipes buried during grouting, reducing the impact on the structural strength of the grout in the anchoring section and the bonding with the rod (cable), thus improving anchoring quality. Furthermore, it allows for multiple high-pressure grouting or splitting grouting as needed, flexibly adapting to different construction requirements and improving construction efficiency and reliability.
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