Vacuum auxiliary anchor sealing construction method of reversed anchor pocket

Abstract

The invention discloses a vacuum auxiliary anchor sealing construction method of a reversed anchor pocket. The vacuum auxiliary anchor sealing construction method comprises the following steps that firstly, an air exhausting hole is punched in the position, directly facing the highest position of the anchor pocket, of an anchor sealing formwork, an air exhausting pipe for vacuumizing is mounted in the air exhausting hole, the tail end of the air exhausting pipe can directly abut against the highest position of the anchor pocket, a grouting hole is punched in the position, directly facing the lowest position of the anchor pocket, of the anchor sealing formwork, and a slurry inlet pipe for grouting is mounted in the grouting hole; secondly, the anchor sealing formwork is buckled on the anchor pocket to seal the anchor pocket; and thirdly, the slurry inlet pipe is sealed, the anchor pocket is vacuumized through the air exhausting pipe, and after the vacuum degree reaches the set threshold value, the slurry inlet pipe is opened to pour concrete into the anchor pocket. The anchor sealing formwork is fully closed for one time, the integrity of an anchor sealing body is good, the anchor sealing body makes full contact with the interface of original concrete, and holes and fall-off faces do not exist, therefore the anchor sealing body can well isolate corrosion of water vapor in the air to a prestressed anchorage device, and structural durability is strengthened.

Description

technical field [0001] The invention relates to the field of prestressed construction. More specifically, the present invention relates to a vacuum-assisted anchor sealing construction method for an undercut anchor hole. Background technique [0002] Due to the high efficiency of material use, large spans, small cracks, and good structural durability, prestressed structures are more and more widely used in engineering applications. Usually the prestressed anchors are installed at both ends of the concrete beam. After the prestress is stretched, the excess steel strands are cut off, the formwork is closed, the concrete is poured, and the concrete is vibrated and compacted. After the concrete reaches its strength, the formwork is removed to complete the anchor sealing. [0003] In the prestressed structure, there is an inverted buckle-shaped anchor hole with the tension end facing downward. The method of pouring the anchor concrete with the conventional closed formwork for th...

AI Technical Summary

Problems solved by technology

[0004] 1. In order to leave the concrete pouring hole, the formwork cannot be completely closed;

[0005] 2. Under the action of gravity, the concrete cannot fit the original concrete surface during pouring, and there is a void above the anchor hole after the concrete is vibrated;

[0006] 3. Due to the reasons of 2, the anchor concrete cannot block air and water to protect the anchorage, and even the anchor concrete may fall

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