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A Chain Lap Structure Based on Seamless Bridge

A chain-type, seamless bridge technology, applied in bridges, bridge parts, bridge construction, etc., can solve problems such as board damage, bridge impact increase, settlement, and bottom of the board, so as to improve driving comfort , Improve the effect of mechanical performance

Active Publication Date: 2017-05-24
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The seamless bridge structure will move longitudinally under the action of alternating temperature, and the displacement of the superstructure will cause the displacement of the slab behind the abutment. Causing reflection cracks on pavement
[0003] Under the action of self-weight and vertical traffic load, the subgrade will settle and compress, which will lead to the settlement of the board and the void at the bottom of the board, which will cause the damage of the board and the phenomenon of vehicle jumping at the bridge head, which will increase the impact of the car on the bridge. Further cause damage to the bridge structure and cause major economic losses

Method used

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  • A Chain Lap Structure Based on Seamless Bridge
  • A Chain Lap Structure Based on Seamless Bridge
  • A Chain Lap Structure Based on Seamless Bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Integral bridge

[0028] Figure 1 ~ Figure 3 Shows the first specific embodiment of the seamless bridge-based chain slab construction of the present invention. This structure is used for an integral bridge and includes abutment 6, main beam 11, bridge deck 10 and slab 3. Among them, abutment 6, main beam 11 and deck 10 constitute the main bridge section of the bridge.

[0029] The key improvement of the present invention is that the number of the landing boards 3 is more than two, and these landing boards 3 are arranged at the end of the main bridge section and arranged side by side along the length direction of the main bridge section. Expansion joints 4 are provided between the main bridge section (specifically the abutment 6 of the main bridge section) and the slab 3 closest to the main bridge section, and between any two adjacent slabs 3 . Moreover, the main bridge section and the slab 3 closest to the main bridge section and any two adjacent slabs 3 are c...

Embodiment 2

[0040] Example 2: Semi-Integral Bridge

[0041] Figure 4 with Figure 5 The second specific embodiment of the seamless bridge-based chain slab structure of the present invention is shown. The chain slab structure of this example is basically the same as the structure of the first embodiment. The difference lies in: this embodiment For example, this kind of chain-type slab construction is specifically applied to a semi-integral bridge (not the integral bridge of the first embodiment). The same as the first embodiment, the dumbbell-shaped structural steel bar 1 used to connect the main bridge section and the slab 3 has one end connected to the abutment 6 and the other end connected to the slab 3.

[0042] During construction, before the abutment 6, the main girder 11 and the deck 10 are formed as a whole, the non-rubber sleeve end of the dumbbell-shaped structural steel bar 1 is pre-embedded at the abutment 6, and then the bridge abutment 6 concrete is cast in place.

Embodiment 3

[0043] Example 3: Extending the bridge deck bridge

[0044] Image 6 with Figure 7 The third specific embodiment of the seamless bridge-based chain slab structure of the present invention is shown. The chain slab structure of this example is also very similar to the structure of the first embodiment. The difference lies in: Embodiment This kind of chain-type slab construction is specifically applied to an extended deck bridge (rather than the integral bridge of the first embodiment). The dumbbell-shaped structural steel bar 1 used to connect the main bridge section and the slab 3, one end of which is connected to In the bridge deck 10 (instead of the bridge abutment 6 in the first embodiment), the other end is connected to the bridge 3.

[0045] During construction, before pouring the bridge deck 10, the rubber-free end of the dumbbell-shaped structural steel bar 1 is pre-embedded at the end of the bridge deck 10, and then the bridge deck concrete is cast in place.

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PUM

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Abstract

The invention discloses a chain type butt strap structure based on a seamless bridge. The chain type butt strap structure comprises a bridge abutment, a girder, a bridge deck and two or more butt straps, wherein the bridge abutment, the girder and the bridge deck form the main bridge section, and the butt straps are arranged at the end of the main bridge section in parallel and in the length direction of the main bridge section. Expansion joints are formed between the main bridge section and the butt strap closest to the main bridge section and between every two adjacent butt straps. The main bridge section and the butt strap closest to the main bridge section and every two adjacent butt straps are connected through dumbbell-shaped-structure steel bars, each dumbbell-shaped-structure steel bar is composed of a linear steel bar and two annular steel bars connected to the two ends of the linear steel bar, and the two annular steel bars are fixed inside the main bridge section and the butt strap or respectively fixed inside two butt straps. According to the invention, cracks in the joints of the butt straps at the rear part and the bridge abutment of the seamless bridge and pavement cracks in the joints of the tail ends of the butt straps and a roadbed can be eliminated, the stress performance of the butt straps of the seamless bridge can be effectively improved, and therefore the drive comfort of vehicles can be improved.

Description

Technical field [0001] The invention relates to a chain-type slab construction based on a seamless bridge, which can be used for integral, semi-integral and extended deck bridges, and belongs to the technical field of bridges. Background technique [0002] The seamless bridge structure will move longitudinally under the action of alternating temperature. The displacement of the superstructure will cause the slab behind the platform to shift. The reciprocating displacement of the slab will cause a gap between the end of the slab and the subgrade. Causes reflection cracks on the road surface. [0003] Subgrade settlement and compression under the action of its own weight and vertical traffic load, resulting in the settlement of the slab and the vacancy at the bottom of the slab, which causes the damage of the slab and the phenomenon of bridge head jumping, which causes the impact of cars on the bridge to increase. It further caused the destruction of the bridge structure and caused ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/00
Inventor 许震
Owner YANCHENG INST OF TECH