Secondary tubular pile tensioning process by prestress and special tensioner

A technology for prestressed pipe piles and tensioning devices, applied in the direction of strengthening and forming, can solve the problems of uneven prestressing of main bars, difficult actual prestressing, high labor intensity, etc., and achieve low manufacturing costs, improve production efficiency, and safety. high effect

Active Publication Date: 2009-04-08
王伟明
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the fact that the tensioning equipment in the prior art can only stretch the main reinforcement of the PHC pile at the same time as a whole or separately in batches. The prestress of the anchored main reinforcement is not uniform and the actual prestress is difficult to control. , cumbersome operation, low work efficiency and high labor intensity, provide the society with a secondary tensioning process and special tensioning device for separately and synchronously equivalent tensioning of all main reinforcements of PHC piles, so as to improve production efficiency and reduce labor costs. Labor intensity and stable tension quality of the main reinforcement material meet the needs of PHC pile production units

Method used

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  • Secondary tubular pile tensioning process by prestress and special tensioner
  • Secondary tubular pile tensioning process by prestress and special tensioner
  • Secondary tubular pile tensioning process by prestress and special tensioner

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Embodiment Construction

[0021] As shown in Figure 1, when the special tensioning device of the present invention secondly tensions the PHC pile main reinforcement 2, an integral tensioning machine 15 and a hydraulic device B are set at one end of the steel mold 7, and the integral tensioning machine 15 and the jack 14 are tensioned. Pull ring 12 is connected pipe pile end plate 11, and described end plate 11 comprises bottom plate 8 and end 10, and evenly distributes a plurality of stiffening plates 9 between described bottom plate 8 and end head 10 inner walls, and described bottom plate 8 and main bar 2 are formed by Anchors anchor. The tension ring 12 is connected to the bottom plate 8 by bolts 13 . A pre-tensioning machine 1 is established at the other end of the steel mold 7 . The end of the steel mold 7 is fixed with a support plate 5 by bolts 6, and all the main bars 2 of the steel cage pass through the support plate 5 through the stretching holes 24 provided at the corresponding positions of...

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Abstract

A secondary stretching technology for the prestressed tubular pile includes such steps as synchronous equivalent stretching by the pre-pull jacks of prestretching machine, anchoring, and pulling end plates by the jacks of whole stretching machine for stretching master reinforcing bars. Its special stretching apparatus is composed of whole stretching machine, hydraulic system B, steel mould, prestretching machine, jacks and hydraulic system A.

Description

technical field [0001] The present invention relates to the tensioning process of the main reinforcement of the pre-tensioned prestressed concrete pipe pile and its special tensioning equipment, in particular to a secondary tensioning method for pre-tensioning and overall tensioning the main reinforcement at both ends of the steel mold of the pipe pile. Drawing process and its special tensioning equipment. Background technique [0002] According to relevant records, my country introduced the manufacturing technology of high-strength prestressed concrete pipe piles (PHC piles for short) from abroad for the first time in 1982. Because the pipe pile products have the advantages of high strength, good durability, stable quality and economy, It has already been promoted and popularized in China, and is widely used in various construction projects. In order to standardize the production of this product, the state issued the "Pretensioned Prestressed Concrete Pipe Pile" (GB13467-19...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B21/60
Inventor 胡金雄陈志良徐坚波张陆陆叶中海
Owner 王伟明
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