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A structure and construction method for strengthening the connection between precast concrete segments

A technology of precast concrete and construction method, applied in bridge parts, erection/assembly of bridges, bridge materials, etc., can solve problems such as vehicle falling bridges, fractures, etc., to improve bearing capacity and durability, good overall performance, and low technical requirements Effect

Active Publication Date: 2017-08-25
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When it reaches a certain level, the segments will break and cause the vehicle to fall down the bridge.

Method used

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  • A structure and construction method for strengthening the connection between precast concrete segments
  • A structure and construction method for strengthening the connection between precast concrete segments
  • A structure and construction method for strengthening the connection between precast concrete segments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The schematic diagram corresponding to this embodiment is shown in figure 1 and image 3 , there is an embedded steel plate (3) on the upper surface of the bottom plate (1) of the prefabricated segment, the distance from the edge of the embedded steel plate (3) to the seam (6) is 20cm, and the thickness of the embedded steel plate (3) is 20mm, the lower surface of the pre-embedded steel plate (3) is welded with a sleeve (5) with internal threads, and holes corresponding to the internal threads of the sleeve (5) are made on the pre-embedded steel plate (3), connecting the steel plate (2) The thickness is 16mm, the connecting steel plate (2) crosses the seam (6), connects with the embedded steel plate (3) through the screw rod (4), the screw rod (4) is screwed into the sleeve (5), and reaches the sleeve (5 ), the main girder is arranged in 4 rows of connecting steel plates (2) along the direction of the bridge, there are screw rods (4) at the ends of the connecting steel...

Embodiment 2

[0038] For the schematic diagram corresponding to this embodiment, see Figure 5 , the difference between this embodiment and the first embodiment is that: the added structure is arranged on the lower surface of the bottom plate (1) of the prefabricated segment, the structure of this embodiment can effectively avoid or delay the cracking of the seam (6), The bending resistance of the main girder can be improved more effectively, and the construction method is similar to that of the first embodiment.

Embodiment 3

[0040] For the schematic diagram corresponding to this embodiment, see figure 2 and Figure 4 , the difference between this embodiment and the first embodiment is that the embedded steel plate (3) on both sides of the joint (6) is connected with the connecting steel plate (2) through the weld (7), and the weld (7) is three sides Surrounding welding, anchoring steel bar (8) is welded under the pre-embedded steel plate (3), the length of the anchoring steel bar (8) is 25cm, and the main beam is arranged in 4 rows of connecting steel plates (2) along the transverse direction of the bridge, and it is symmetrical along the transverse direction of the main beam The distribution and construction method are similar to those in Example 1, and the bolted connection is changed to site welding, which avoids the difficulty in installing the screw (4) that may be caused by the error in the position of the opening on the connecting steel plate (2). Because it is downward welding, the opera...

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Abstract

The invention discloses a structure for enhancing connection among prefabricated concrete segments and a construction method thereof, belonging to the field of bridge engineering. According to the invention, pre-embedded steel slabs are arranged on upper and lower surfaces of a bottom plate; and after the segments are spliced, adjacent segments are connected by using connecting steel slabs. The shear resistance and tension resistance among segments at the bottom of a girder are enhanced, the bending resistance of the girder is improved, and a crack at the bottom of a seam is delayed; and even if the crack occurs, the crack can be effectively prevented from expanding to the upper part of a web by using the connecting steel slabs. Compared with the prior art, the structure is convenient in construction and less in cost increase, and the durability and bearing capacity of the structure are greatly improved.

Description

technical field [0001] The invention relates to a structure and a construction method for strengthening the connection between prefabricated concrete segments, belonging to the field of bridge engineering. Background technique [0002] The prefabricated assembly construction method of concrete bridges is a construction method for medium-span beam bridges, which divides the beam body into several segments and transports them to the bridge site for assembly after prefabrication in the prefabrication plant. Due to the prefabrication in the factory in advance, there is little interference to the construction site, the construction speed is relatively fast, and the quality of the beam body is easy to control. It is especially suitable for bridges with a bridge length of more than 2 kilometers and urban viaducts. It has been widely used in recent years and is the future bridge construction. important direction of development. [0003] When the prefabricated segment method is used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/00E01D21/00E01D101/30
CPCE01D19/00E01D21/00E01D2101/30
Inventor 魏建东蔡迎春杜朝伟管曼羽成书普
Owner ZHENGZHOU UNIV
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