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Macromolecular elastomer expansion joint

A polymer elastomer and expansion joint technology, applied in bridge parts, bridges, buildings, etc., can solve the problems of difficult repair, easy damage, easy damage to expansion devices, etc., to achieve the effect of easy installation, satisfying bridge deformation, and smooth driving.

Inactive Publication Date: 2014-03-26
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the bridge expansion joint device is installed at the weak part of the beam end, it directly bears the repeated action of the vehicle load, and is exposed to nature and is affected by various natural factors. Therefore, the expansion joint device is a vulnerable and difficult to repair part. In the past, steel expansion joints were commonly used in large bridges, but they were easily damaged when the beam body was bent and twisted. Therefore, it is urgent to develop new expansion joints that can be applied to various load conditions.

Method used

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  • Macromolecular elastomer expansion joint
  • Macromolecular elastomer expansion joint
  • Macromolecular elastomer expansion joint

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Comparison scheme
Effect test

Embodiment 1

[0018] Such as figure 1 , 2 Shown in and 4, the polymer elastomer expansion joint of the present invention, the polymer elastomer expansion joint 1 is made of polyurethane elastomer, the length is as long as the width of the concrete pavement 3, and the thickness is the same as the pavement layer 4, and is installed on the On the concrete pavement 3, which is flush with the pavement layer 4, the polymer elastomer expansion joint 1 includes a fixed area 5 and a telescopic deformation area 6; the telescopic deformation area 6 adopts a constant cross-section form, and the deformation holes 8 above are diamond-shaped.

Embodiment 2

[0020] Such as image 3 and 5 As shown, the polymer elastomer expansion joint of the present invention, the polymer elastomer expansion joint 1 is made of fiber reinforced composite material, the length is as long as the width of the concrete pavement 3, and the thickness is the same as that of the pavement layer 4, and is installed on the concrete by bolts 2 On the road surface 3, which is flush with the pavement layer 4, the polymer elastomer expansion joint 1 includes a fixed area 5 and a telescopic deformation area 6; the telescopic deformation area 6 adopts a variable cross-section form, and the deformation hole 8 above is elliptical.

[0021] The preparation process of the polymer elastomer expansion joints in the above two embodiments is as follows:

[0022] a. Make a mold for the expansion joint of the polymer elastic body first, and reserve the positions such as the deformation hole 8 and the bolt hole 7.

[0023] b. Example 1: Polymer elastomer expansion joint 1 ca...

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Abstract

The invention discloses a macromolecular elastomer expansion joint, which comprises a fixed area, an expansion deformation area, bolt holes, deformation holes and bolts, wherein the macromolecular elastomer expansion joint is arranged on a concrete pavement through the bolts, and is flush with a pavement layer; the bolt holes are formed in the fixed area; the deformation holes are formed in the expansion deformation area. The macromolecular elastomer expansion joint has the advantages of lightweight, strong strength, corrosion resistance, free expansion, smoothness and no jump or noise during the running of a vehicle, easiness in mounting and the like, and is applied between two beam ends and between the beam ends and bridge abutments or to the hinging positions of bridges, and the deformation requirements of expansion, torsion, bending and the like of the bridges can be met.

Description

technical field [0001] The invention relates to a polymer elastic body expansion joint, which can be used as an expansion joint to meet the deformation of road surfaces and bridges, is suitable for road, bridge and tunnel engineering, and belongs to the field of civil engineering. Background technique [0002] In order to meet the requirements of bridge and road deformation, expansion joints are usually set between two girder ends, between girder ends and abutments, or at the hinge position of bridges. Because the bridge expansion joint device is installed at the weak part of the beam end, it directly bears the repeated action of the vehicle load, and is exposed to nature and is affected by various natural factors. Therefore, the expansion joint device is a vulnerable and difficult to repair part. In the past, steel expansion joints were commonly used in large bridges, but they were easily damaged when the beam body was bent and twisted. Therefore, it is urgent to develop ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/06
Inventor 方海刘伟庆张亮徐超庄勇
Owner NANJING UNIV OF TECH
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