Unbonded prestressed tendon controllable segmented anchorage device and its assembly method and application

A prestressed tendon, controllable technology, applied in the direction of structural elements, building components, building reinforcements, etc., can solve problems such as segmentation problems that have not been well solved, and achieve convenient and fast construction, simple construction, and convenient maintenance. Effect

Inactive Publication Date: 2017-04-26
BEIJING ACAD OF BUILDING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In general, the segmentation problem of unbonded prestressed multi-span continuous beams has not been well solved

Method used

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  • Unbonded prestressed tendon controllable segmented anchorage device and its assembly method and application
  • Unbonded prestressed tendon controllable segmented anchorage device and its assembly method and application
  • Unbonded prestressed tendon controllable segmented anchorage device and its assembly method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In the two-span continuous prestressed beam, install the controllable anchor segmental device in the node core area on the center column (see Figure 4 ), turn the outer threaded casing to make it in a non-working state, after passing through the prestressed tendons, pour concrete for the beam, and after the double-ended prestressed and anchored, reversely turn the outer threaded casing to make the controllable anchor segmented device in working condition. Realize the segmentation purpose of its two-span prestressed beam.

Embodiment 2

[0055] In the three-span continuous prestressed beam, one piece of the controllable anchor segment device is installed in the node core area on the center column (see Figure 5 ), turn the outer threaded casing to make it in a non-working state, after passing through the prestressed tendons, pouring beam concrete, 1) after tensioning the prestressed left end and anchoring, reversely turn the outer threaded casing to separate the controllable anchor When the section device is in working condition, the prestressed right end is stretched and anchored to achieve the purpose of segmenting the three-span prestressed beam. 2) After the left end and right end are prestressed and anchored, the externally threaded casing is reversely turned to put the controllable anchor segment device in working condition, realizing the segmental purpose of the three-span prestressed beam.

Embodiment 3

[0057] In the three-span continuous prestressed beam, two controllable anchorage segmental devices are respectively installed in the node core areas on the left and right central columns (see Image 6 ), turn the outer threaded casing to make both of them in the non-working state, after passing through the prestressed tendons, pour the beam concrete, 1) after tensioning the left end prestress and anchoring, reversely turn the outer threaded casing to make the left side controllable The sectional device of the controllable anchorage device is in the working state, and then the right end is prestressed and anchored, and the external threaded casing is reversely turned to make the controllable sectional device of the anchorage device in the working state to realize the sectionalization of the three-span prestressed beam. Purpose. 2) After the left end and right end are prestressed and anchored, the externally threaded casing is rotated in reverse to make the two controllable anch...

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Abstract

The invention relates to an unbonded prestress tendon controllable anchor sectioning device and an assembling method and application of the unbonded prestress tendon controllable anchor sectioning device, belonging to the field of application of prestress concrete structures. The unbonded prestress tendon controllable anchor sectioning device comprises a bidirectional anchor cup, left clamping pieces, a left threaded casing pipe, a right threaded casing pipe, an outer threaded casing pipe and right clamping pieces, wherein a through hole is formed in the axis part of the bidirectional anchor cup in the length direction; a vertical hole is formed in the upper part of the bidirectional anchor cup; the left (right) clamping pieces are 2-3 conical clamping pieces, and the tail parts of the left (right) clamping pieces are provided with oblique opened lug plates, and the oblique directions of the oblique opened lug plates are opposite to the conical direction of a left conical hole; the left (right) threaded casing pipes can be connected with the oblique opened lug plates at the tail parts of the left clamping pieces and the right clamping pieces; the outer threaded casing pipe is connected with the left threaded casing pipe and the right threaded casing pipe. The aim of sectioning a multi-span continuous prestress beam by changing the operation state of the controllable anchor sectioning device can be achieved, and further the aims of reducing the prestress loss, preventing an anchor from affecting the full span and the mutual influences on each span can be achieved.

Description

technical field [0001] The invention relates to an unbonded prestressed tendon controllable anchor segment device and its assembly method and application, which belongs to the application field of prestressed concrete structures and is mainly used in unbonded prestressed beams such as long-span structures and stadiums , boards and other components. Background technique [0002] In recent years, with the development of construction technology, the prestressed concrete structure has also been developed rapidly, especially the unbonded prestressed concrete structure, which does not need to reserve holes and is suitable for complex and curved reinforcement components; the construction is simple; The advantages of tension and corrosion resistance have been widely used. [0003] In practical engineering applications, there are often multi-span continuous prestressed beams, the length of which is tens of meters or even hundreds of meters. In the case of pulling, it will have adve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C5/12
Inventor 郭二伟徐刚苏浩高晋栋张立森刘占利周黎光王丰
Owner BEIJING ACAD OF BUILDING ENG
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