Prefabricating process of post-tensioned prestressing pipe pile joint

Abstract

The invention discloses a prefabricating process of a post-tensioned prestressing pipe pile joint. The prefabricating process comprises the following steps that (1) the post-tensioned prestressing pipe pile joint is poured, spun and formed; (2) a vacuum filter cloth sleeve is sheathed outside an inflatable capsule with a vacuum suction pipe; (3) the uninflated inflatable capsule is put into an inner cavity of the post-tensioned prestressing pipe pile joint, and then low-pressure compressed air is inflated; simultaneously, a vacuum pump is started, excessive moisture in concrete in a prestressing pipe pile is sucked and removed by the vacuum suction pipe, and the pressure is kept for 8 to 10 minutes; (4) the vacuum pump is turned off, the low-pressure compressed air in the inflatable capsule is discharged, then the inflatable capsule is pulled out, and the post-tensioned prestressing pipe pile joint is maintained and then demoulded. By using the prefabricating process, free moisture in the concrete is sucked and removed, the water-cement ratio of the concrete in the prestressing pipe pile is effectively reduced, and the strength of the concrete is increased; the concrete is further compacted by the inflatable capsule, so that the compactness and the overall performance of the concrete are improved; the prefabricating process has the advantages of simple construction process and strong adaptation.

Description

technical field [0001] The invention relates to a post-tensioned prestressed pipe pile of hydraulic engineering, in particular to a manufacturing process of a post-tensioned prestressed pipe pile pipe joint, and belongs to the technical field of building construction. Background technique [0002] Modern coastal wharves are developing towards long piles and large spans. Among them, the application of large-diameter post-tensioned prestressed pipe pile pipe joints is becoming more and more common. Roller composite process is used for mechanized production, and post-tensioned prestressed pipe pile pipe joints are made of dry hard concrete vertically. The Viber consistency, which represents the fluidity index of dry hard concrete, is generally controlled within 20~35s. The production of post-tensioned prestressed pipe pile pipe joints relies on imported equipment, the production process is relatively complicated, and the production cost is relatively high. There are also some ...

AI Technical Summary

Problems solved by technology

[0002] Modern coastal wharves are developing towards long piles and large spans. Among them, the application of large-diameter post-tensioned prestressed pipe pile pipe joints is becoming more and more common. Roller composite process is used for mechanized production, and post-tensioned prestressed pipe pile pipe joints are made of dry hard concrete vertically. The Viber consistency, which represents the fluidity index of dry hard concrete, is generally controlled within 20~35s. The production of post-tensioned prestressed pipe pile pipe joints, its equipment is imported, the production process is relatively complicated, and the production cost is relatively high

There are also some projects that use ordinary centrifugal equipment to make post-tensioned prestressed pipe pile pipe joints, but this kind of post-tensioned prestressed pipe pile pipe joints cannot meet the concrete density requirements

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