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Segmental beam splicing method for integrally suspending continuous beam and then tensioning continuous beam

A post-tensioning and segmental beam technology, which is applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of large cumulative alignment deviation and difficulty in controlling the alignment of the bridge, so as to reduce line deviation and reduce The effect of prestressed material consumption and uniform force

Inactive Publication Date: 2021-06-01
CCCC SHEC FOURTH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional process adjusts the alignment in sections, and the cumulative alignment deviation is relatively large. It is necessary to set the pre-arch value step by step, and it is difficult to control the alignment of the bridge.

Method used

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  • Segmental beam splicing method for integrally suspending continuous beam and then tensioning continuous beam
  • Segmental beam splicing method for integrally suspending continuous beam and then tensioning continuous beam
  • Segmental beam splicing method for integrally suspending continuous beam and then tensioning continuous beam

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Effect test

Embodiment 1

[0042] The present invention is realized through the following technical solutions, as Figure 1-Figure 6 as shown,

[0043] The invention discloses a segmental beam assembling method in which continuous beams are integrally hung and then tensioned, the beam segments within the T-structure range are suspended, and then the beam segments within the T-structure range are integrally stretched.

[0044] The present invention suspends the beam segments as a whole within the range of a T structure, and then stretches all the beam segments in a T structure;

[0045] Since the T-structure beam section is suspended and the line shape is uniformly adjusted at one time, the cumulative error of the line shape of the segmental beam due to multiple suspensions of the beam section is reduced; the waste of steel strands caused by the repeated setting of prestressed multi-sections is reduced; The suspension and tension of the T-beam section are integrated into one process, which greatly impro...

Embodiment 2

[0060] Taking the construction of a 3×40.7m continuous beam as an example, the construction process is briefly described as follows:

[0061] Step 1: If figure 1 As shown, after the bridge erecting machine 1 moves vertically to the hole position to be erected, the pier top block of the N+2# advanced pier is first installed, and then the beam section within the first "T structure" range of the joint is suspended as a whole, and adjusted block by block, Glue coating and temporary preloading to complete the assembly of beam segments within the scope of "T structure";

[0062] Step 2: If figure 2 As shown, the prestressed beam section within the tension "T structure" range, the whole bridge erecting machine 1 is unloaded, and the suspension 2 is removed;

[0063] Step 3: If image 3As shown, the cantilevering of the beam section of the first side span and the prestressed stretching of the first side span are completed in situ, the concrete 3 of the closing section of the first...

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Abstract

The invention relates to the technical field of continuous beam segment prefabrication and assembly, and particularly discloses a segmental beam splicing method for integrally suspending a continuous beam and then tensioning the continuous beam. The method comprises the following steps: firstly suspending beam segments in a T-shaped structure range, and then integrally tensioning the beam segments in the T-shaped structure range. The method can reduce beam section adjusting procedures, prevent installation errors from affecting the overall quality of the continuous beam girder, and improve the installation effect of the segmental beam.

Description

technical field [0001] The invention relates to the technical field of segmental prefabrication and assembly of continuous beams, in particular to a segmental beam assembly method in which continuous beams are integrally hung and then tensioned. Background technique [0002] The segmental method of traditional continuous beam T structure adopts alternate beam segment assembly and temporary prestressed tensioning, and the prestressed tensioning of beam segments is performed after a pair of beam segments are assembled symmetrically. [0003] The traditional process adjusts the alignment in sections, and the cumulative alignment deviation is relatively large. It is necessary to set the pre-arch value step by step, and it is difficult to control the alignment of the bridge. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a segmental girder assembling method in which the continuous girder is suspended as a whole and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 朱斌典汪成龙钟永新方龙魏湛力周海生王慧魏士统罗平韦旭东雷欣
Owner CCCC SHEC FOURTH ENG
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