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Improved Miller type expansion joint device and mounting method thereof

An installation method and expansion joint technology, applied in the field of bridge engineering, can solve the problems of increased maintenance costs, long construction period, shortened service life of bridges, etc., and achieve the effects of improving construction quality, high tensile strength, and simplifying construction

Pending Publication Date: 2022-07-05
广州市北二环交通科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Frequent maintenance and replacement of bridge expansion and contraction lead to a sharp decrease in the service life of the bridge and an increase in maintenance costs
The maintenance of existing expansion joints often requires closed traffic, and the construction period is long, which greatly interferes with traffic flow, easily causes large-scale traffic jams, and produces huge economic losses and negative social impacts

Method used

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  • Improved Miller type expansion joint device and mounting method thereof
  • Improved Miller type expansion joint device and mounting method thereof
  • Improved Miller type expansion joint device and mounting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The bridge in this embodiment is a multi-span simply supported girder bridge, the main girder is a concrete box girder, and the width of the expansion joint is 60 mm. figure 1 It is a schematic cross-sectional view of the expansion joint device after installation, figure 2 for figure 1 In the partial enlarged schematic diagram of part A in the middle, there is a reserved groove at the end of the beam body 1, and there are door-shaped steel bars 6 extending upwards. The door-shaped steel bars 6 are ribbed steel bars with a diameter of 16 mm. The improved Maurer-type expansion joint device is symmetrically arranged with respect to the expansion joint, and includes an upper subsection, a lower subsection, a rubber backing plate 12 between the two subsections, and an anchoring concrete connecting the lower subsection and the beam body 1 as a whole. 2. The anchor concrete 2 is high-toughness concrete mixed with steel fibers 25 . The lower subassembly in contact with the ...

Embodiment 2

[0077] The bridge of this embodiment was installed with the expansion joint device of the present invention several years ago. Since the asphalt layer 4 is damaged, it is now decided to lay a new asphalt overlay 21 on the original asphalt layer 4. See Figure 10 . The specific construction steps are as follows:

[0078] Step 1: Unscrew the connector 15, remove the special-shaped steel rod 13 and the rubber pad 12 below, and place the stitch pad 20. The upper surface of the stitch pad 20 is flush with the upper surface of the existing asphalt layer 4;

[0079] Step 2 The entire line is paved with an asphalt overlay 21;

[0080] Step 3: Cut off the upper asphalt overlay 21 corresponding to the horizontal plate of the L-shaped steel plate 11, take out the seam backing plate 20, and clean the L-shaped steel plate 11;

[0081] Step 4 Considering that the original rubber backing plate 12 is in good condition, it is decided to reuse it and place the newly added rubber height-adjust...

Embodiment 3

[0084] This embodiment is a modification of Embodiment 1, see Figure 11 . In this embodiment, the structure of the expansion joint device is slightly improved in order to prevent and avoid the large slippage of the special-shaped steel rod 13 due to excessive horizontal force. On the horizontal plate of the L-shaped steel plate 11 , there are protruding strips 23 along the longitudinal direction of the expansion joint, and at the same time, the bottom of the special-shaped steel rod 13 has a corresponding groove 24 . A rubber backing plate 12 with an initial thickness of 10mm is installed between the L-shaped steel plate 11 and the special-shaped steel rod 13. The left end of the rubber backing plate 12 is bent upwards and is close to the side of the special-shaped steel rod 13 close to the asphalt layer 4. The upper surface of layer 4 is of equal height. The rubber backing plate 12 adopts a water-stop rubber belt. In addition, add 0.2% expansion agent to the fiber concret...

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Abstract

The invention relates to an improved Miller type expansion joint device and a mounting method thereof, and belongs to the technical field of expansion joint devices of bridges. The expansion joint device is divided into an upper part and a lower part, an elastic cushion is arranged between the upper part and the lower part, the lower part is connected with a beam body into a whole through poured concrete, and the upper part is connected with the lower part through a screw rod. When concrete is poured, a flow guide groove is adopted, a flow guide plate is arranged in the flow guide groove, fibers are oriented after the concrete passes through the flow guide groove, and the steel fibers tend to be perpendicular to the side face of the lower part after pouring. After the base plate straddles the expansion joint, an asphalt layer is paved on the whole road, the asphalt layer in the area corresponding to the upper part is cut off, and the upper part is installed. The height of the expansion joint device is convenient to adjust, so that the upper surface is as high as the upper surface of the asphalt layer, and the asphalt layer is convenient to lay in the future.

Description

technical field [0001] The invention relates to an expansion joint device, in particular to an improved Maurer-type expansion joint device and an installation method thereof, belonging to the technical field of bridge engineering. Background technique [0002] According to statistics, the total number of highway bridges in my country is currently more than 800,000, most of which were built according to the design standards from the 1970s to the early 1980s or even earlier. Among various bridge diseases, the diseases of bridge expansion joint devices account for a considerable proportion. Because most bridges have medium and small spans, relatively simple Maurer-type expansion joint devices account for a considerable proportion, and their diseases account for the vast majority. [0003] Bridge expansion joints are usually set between two beam ends, between beam ends and abutments, or at the hinged position of the bridge. It coordinates the deformation of the bridge on both s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/06E01D19/08
CPCE01D19/067E01D19/083
Inventor 龙翔项彦茂黄毅许志东宁轩姜海波杨梅李俊陈园园刘捷李承霖
Owner 广州市北二环交通科技有限公司
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