A prestressed duct grouting device and a method of using the same

By combining the negative pressure and vibration components of the prestressed duct grouting device, the problems of air bubble retention and void defects in the grout within the duct were solved, achieving efficient and dense grout filling and protection of the prestressed tendons, thus improving construction efficiency and quality.

CN120990366BActive Publication Date: 2026-07-21SINOHYDRO BUREAU 5
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SINOHYDRO BUREAU 5
Filing Date
2025-09-16
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing technologies have failed to effectively address the issues of air bubble retention and local void defects in the grout within the prestressed ducts, and equipment vibrations can easily damage the anti-corrosion layer of the prestressed tendons, while lacking the ability to propel the grout synchronously.

Method used

A prestressed duct grouting device is adopted, including a grouting component, a negative pressure component, a vibration component, and a traction component. Through a negative pressure environment, vibration, and synchronous movement, dynamic and dense filling of grout is achieved.

Benefits of technology

It significantly improved the grouting quality, eliminated air bubble retention and void defects, protected the anti-corrosion layer of prestressed tendons, shortened the construction cycle, and reduced costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120990366B_ABST
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Abstract

The application discloses a prestressed hole pressure grouting device and a use method thereof, anchor structures are arranged on two sides of a prestressed hole, a pressure grouting assembly is arranged at a connecting hole on one side of the prestressed hole and is used for pressure grouting in the prestressed hole, a negative pressure assembly is arranged at a connecting hole on the other side of the prestressed hole and is used for providing a negative pressure environment for the prestressed hole, a vibration assembly is arranged in the prestressed hole and is used for vibrating and promoting dense filling of grout when the pressure grouting assembly pressure grouts, and a traction assembly is arranged outside the prestressed hole and is connected to the vibration assembly through a traction line and is used for pulling the vibration assembly out of the prestressed hole. The anchor structures are arranged at two ends of the prestressed hole, the negative pressure assembly is used for keeping the prestressed hole in a negative pressure state, the pressure grouting assembly pressure grouts so that the grout flows to the other end along the prestressed hole, and the vibration assembly is started to vibrate and eliminate bubbles in the process of pressure grouting, and the grouting quality is improved.
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