Compacting apparatus for prestressed pore passage grouting

Abstract

The invention discloses a device for grouting and compacting a prestressed channel, which comprises: a corrugated pipe with a pass, matching joints and ends. The mouth width of the corrugated pipe is L<5mm, and the mouth divides the bellows into upper and lower parts; the ratio of the area of ​​the upper lumen to the area of ​​the lower lumen is less than 20%; The rib area is determined. The supporting joint is in the form of two-piece outsourcing, and the two-piece joint is fastened through the upper and lower slide grooves. The supporting end is composed of three parts: connecting section, variable diameter section and equal section section. Among them, the structure and size of the connecting section are the same as those of the corrugated pipe with a pass, and are connected to the corrugated pipe with a pass through a joint; The part where the plate holes are connected. It overcomes the effect of cement slurry bleeding and makes the grouting material around the prestressed tendons completely dense. At the same time, the longitudinal stiffness of the bellows is increased.

Description

technical field [0001] The invention relates to a prestressed channel grouting device, in particular to a corrugated pipe with a pass different from the traditional single-section corrugated pipe and matching joints and ends used in post-tensioned prestressed concrete channel grouting construction. head. Background technique [0002] In the construction of post-tensioned prestressed concrete in the civil engineering industry, cement-based grouting materials are generally used for grouting the prestressed tendons after tension. Its role is to protect the durability of the prestressed tendons and increase the bonding force with the concrete. After the stretching of the prestressed tendons is completed, the prestressed tendons are located at the top of the prestressed tunnel due to the tension force. After the prestressed channel is grouted, the cement slurry with a larger specific gravity will be located at the bottom of the prestressed channel, while water and fine substanc...

AI Technical Summary

Problems solved by technology

However, through a large number of tests, it has been found that the grouting material around the prestressed tendons cannot be guaranteed to be completely dense by using these methods.

Because most of the traditional grouting channels use round pipes or flat pipes, these shapes of pipes are not conducive to the discharge of bleeding

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