CN109338876B - Embedded comb plate telescopic device and using method - Google Patents
Embedded comb plate telescopic device and using method Download PDFInfo
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- CN109338876B CN109338876B CN201811361024.4A CN201811361024A CN109338876B CN 109338876 B CN109338876 B CN 109338876B CN 201811361024 A CN201811361024 A CN 201811361024A CN 109338876 B CN109338876 B CN 109338876B
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- comb plate
- plate
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- bridge
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
Abstract
The invention discloses an embedded comb plate telescopic device and a using method thereof. Embedded fishback telescoping device includes: the device comprises a first movable comb plate, a second movable comb plate, a static comb plate, a damping rubber support, a fastening screw, an anchoring device, a stainless steel sliding plate and a water stop belt; the first movable comb plate is embedded into bridge abutment concrete, the second movable comb plate is connected with the first movable comb plate through a fastening screw, the static comb plate is level with a road surface and is connected with a bridge abutment on the other side through concrete, and a gap meeting the transverse displacement of a bridge is reserved between comb teeth matched with the first movable comb plate and the static comb plate in the transverse direction of the bridge floor; the stainless steel sliding plate is positioned below the bridge abutment on one side of the static comb plate and is used for sliding the first movable comb plate; the damping rubber support is positioned between the first movable comb plate and the second movable comb plate; the upper surface and the lower surface of the first movable comb plate are both connected with anchoring devices for connecting concrete; the lower surface of the static comb plate is also connected with an anchoring device.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to an embedded comb plate telescopic device and a using method thereof.
Background
In bridge engineering, under a normal bridge use state, the bridge deck deforms due to concrete creep, temperature or driving load change. Therefore, bridge expansion joints are required to be arranged between the two ends of the bridge, between the beam ends and the abutment or at the hinged positions of the bridge, and bridge expansion devices are arranged at the bridge expansion joints to meet the requirement of bridge deck deformation and ensure the driving safety, comfort and safety of the bridge structure.
At present, the highway bridge expansion device mainly comprises a module expansion device and a comb plate expansion device. Wherein fishback formula telescoping device is owing to its simple structure, can be according to advantages such as bridge floor width nimble combination, uses in the bridge more and more extensively.
The existing comb plate type expansion device mainly comprises a comb plate exposed outside, an anchoring bolt below the comb plate, a waterproof structure and the like. In the actual use process, one telescopic device is often divided into a plurality of units according to the width of the bridge floor, and the units operate independently. In the use process of the comb plate type expansion device, the comb plate exposed outside directly and completely bears the cyclic pulse type load and the impact load of a vehicle. And transfers the load to the bridge through the concrete to which it is attached. The comb plate receives various loads and impacts from the vehicle, and is subject to vibration and elastic deformation. The stress due to the impact and elastic deformation caused by the vibration is inevitably transmitted to the concrete to which it is attached. For concrete and broach board, the articulamentum between concrete and the broach board is whole connected system weakest link. Particularly, the hardness of the comb plate is far higher than that of concrete. Under the impact of repeated vibration and elastic deformation of the comb plate, abrasion gradually occurs on one side of concrete of the connecting layer. Simultaneously, some collections that can inevitably appear in the concrete are joined in marriage the condition of rubble and fishback downside direct contact, under fishback's impact, can appear the collection join in marriage the rubble cracked and lead to the connecting layer crack to appear. The wearing and tearing of concrete and the cracked crack that produces of concentrated broken stone can further aggravate the vibrations and the impact of fishback, finally appear peeling off of tie layer and lead to the unsettled phenomenon of fishback. After the comb plate is suspended, the comb plate is easy to warp and fall off due to the loss of support, and finally the telescopic device is completely failed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an embedded comb plate type expansion device and a using method thereof, which overcome the defects that the comb plate of the existing comb plate type expansion device is easy to peel off from concrete and has short service life.
The technical scheme is as follows:
an embedded comb plate retractor, comprising: the device comprises a first movable comb plate, a second movable comb plate, a static comb plate, a damping rubber support, a fastening screw, an anchoring device, a stainless steel sliding plate and a water stop belt;
the first movable comb plate is embedded into bridge abutment concrete, the second movable comb plate is connected with the first movable comb plate through a fastening screw, the static comb plate is level with a road surface and is connected with a bridge abutment on the other side through concrete, and a gap meeting the transverse displacement of a bridge is reserved between comb teeth matched with the first movable comb plate and the static comb plate in the transverse direction of a bridge deck; the stainless steel sliding plate is positioned below the bridge abutment on one side of the static comb plate and is used for sliding the first movable comb plate;
the damping rubber support is positioned between the first movable comb plate and the second movable comb plate, and is in a pre-compression state during assembly; the upper surface and the lower surface of the first movable comb plate are both connected with anchoring devices for connecting concrete; the lower surface of the static comb plate is also connected with an anchoring device.
Preferably, the first movable comb plate is a rolled steel plate, one side of the first movable comb plate close to the bridge abutment is provided with a mesh-shaped structure, and the other side of the first movable comb plate is provided with comb-shaped teeth. Design in the embedding concrete makes when the driving passes through, vehicle load and impact direct action are at the abutment to directly transmit for bridge itself through the abutment, rather than being used in first movable comb plate, the effectual easy condition of damaging of movable comb plate because of directly bearing the repeated impact of vehicle of having avoided. One side that first movable fishback is close to the abutment is mesh column structure, and mesh size and position are confirmed according to the fishback size, and the fishback of being convenient for can have better joint strength with the concrete, simultaneously, can conveniently observe the watering and the filling condition of concrete.
Preferably, the second movable comb plate is a rolled steel plate, one side of the second movable comb plate is provided with comb-shaped teeth, and the tooth form of the second movable comb plate is the same as that of the first movable comb plate. Vehicle load and impact directly act on the second movable comb plate, and the first movable comb plate is transmitted to the damping rubber support through the fastening screw. The existence of the damping rubber support effectively slows down the vibration and impact brought by the travelling crane.
Preferably, the stainless steel sliding plate is connected with the static comb plate through welding.
Preferably, during assembly, the damping rubber support is in a pre-compression state, a pre-tightening effect is achieved on the fastening screw, and bolt looseness caused by repeated impact of a vehicle can be effectively prevented.
Preferably, a water stop belt is arranged below the embedded comb plate expansion device. The water stop belt is integrated in the transverse direction of the bridge floor, so that dust, rainfall, snowfall and the like brought by a travelling crane can be effectively prevented. Prevent the pollution and damage of dust, sleet, etc. to the bridge beam supports.
The second movable comb plate is connected with the first movable comb plate through the fastening screws, so that the exposed area of the movable comb plate is greatly reduced.
According to the using method of the embedded comb plate telescopic device, a plurality of embedded comb plate telescopic devices are installed in parallel according to the width of a bridge floor. The groups of telescopic devices are independent from each other. When the bridge expansion amount is uneven due to different temperatures in the transverse direction of the bridge deck, the expansion devices of each group independently expand and contract, the internal stress of the bridge expansion devices can be effectively reduced, and the service life of the bridge expansion devices is prolonged.
Drawings
Fig. 1 is a schematic cross-sectional view of an embedded comb plate retractor;
fig. 2 is a plan view of the nested comb plate retractor.
Description of reference numerals:
1-a moving comb plate 1; 2-moving comb plate 2; 3-a static comb plate; 4-a damping rubber support; 5-fastening bolts; 6-anchoring means; 7-water stop rubber belt; 8-stainless steel slide plate.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following describes a retractable device of an embedded comb plate and a using method thereof in detail with reference to the accompanying drawings. The following examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
Example 1
An embedded comb plate expansion device comprises a movable comb plate 1, a movable comb plate 2, a static comb plate, a damping rubber support, a fastening screw, an anchoring device, a stainless steel sliding sheet and a water stop. Wherein move the broach board 1 and bury in the abutment concrete, move the broach board 2 and link to each other with moving the broach board through fastening screw, damping rubber support is located and moves between broach board 1 and the broach board 2. The static comb plate is level with the road surface and is connected with the bridge abutment at the other side through concrete. The stainless steel slide plate is positioned below the bridge abutment on one side of the static comb plate, so that the sliding of the movable comb plate 1 is facilitated. One side that moves broach board 1 and be close to the abutment is mesh column structure, and two surface connections have anchor simultaneously about for move broach board 1 and concrete have better being connected. Similarly, the lower surface of the static comb plate is also connected with the same anchoring device.
When the comb plate type expansion device is used, the embedded comb plate type expansion device is placed at an expansion joint of a bridge, the bridge can generate displacement due to temperature and load change or concrete creep, and the corresponding distance between the expansion joints can be increased or reduced. Take bridge expansion joint interval increase as an example, the abutment can pull the movable fishback 1, the quiet fishback 3 that are connected with it, and movable fishback 2 also can remove along with it under the drive of movable fishback 1. So that the whole telescopic device completes telescopic movement; correspondingly, the gap between the comb tooth plates can also meet the requirement of the transverse movement of the bridge. Because the movable comb plate 1 is embedded in the concrete and integrated with the bridge, the exposed parts are only the movable comb plate 2 and the static comb plate. Compared with the traditional comb plate type telescopic device, the design of the embedded type moving comb plate 1 greatly reduces the area of the moving comb plate exposed outside, and greatly reduces the impact and vibration caused by the direct driving on the moving comb plate; on the other hand, though the movable comb plate 2 is directly exposed outside, the vibration and impact brought by the travelling crane can be greatly relieved due to the existence of the damping rubber support, and the movable comb plate 2 is prevented from loosening. The combined design of the embedded movable comb plate and the damping rubber support effectively reduces the impact and vibration effect on the telescopic device, and greatly prolongs the service life of the telescopic device.
The embedded comb plate telescopic device provided by the invention is simple in structure and few in parts, and can meet the deformation requirements of bridges under different conditions. Particularly, due to the design of the embedded movable comb plate, the vehicle load is not directly acted on the movable comb plate but is directly transferred to a bridge girder body through concrete, so that the condition that the movable comb plate of the traditional comb plate type expansion device is easy to fall off due to repeated direct rolling and repeated impact of the vehicle caused by directly exposing the movable comb plate on the road surface is avoided, and the effective service life of the expansion device is prolonged; the shock absorption rubber support effectively reduces the impact on the bridge when a vehicle passes through the shock absorption rubber support, and can simultaneously meet the displacement and rotation of the bridge in the vertical direction; the gap between the movable comb plate and the static comb plate can meet the change of the rotation angle of the bridge in the horizontal direction.
The present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit and scope of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. An embedded fishback telescoping device, comprising: the device comprises a first movable comb plate, a second movable comb plate, a static comb plate, a damping rubber support, a fastening screw, an anchoring device, a stainless steel sliding plate and a water stop belt;
the first movable comb plate is embedded into bridge abutment concrete, the second movable comb plate is connected with the first movable comb plate through a fastening screw, the static comb plate is level with a road surface and is connected with a bridge abutment on the other side through concrete, and a gap meeting the transverse displacement of a bridge is reserved between comb teeth matched with the first movable comb plate and the static comb plate in the transverse direction of a bridge deck; the stainless steel sliding plate is positioned below the bridge abutment on one side of the static comb plate and is used for sliding the first movable comb plate;
the damping rubber support is positioned between the first movable comb plate and the second movable comb plate; the upper surface and the lower surface of the first movable comb plate are both connected with anchoring devices for connecting concrete; the lower surface of the static comb plate is also connected with an anchoring device.
2. The embedded comb plate retractor device of claim 1 wherein the first moving comb plate is a rolled steel plate, and has a mesh-like structure on one side near the abutment and comb-like teeth on the other side.
3. The embedded comb plate retractor device of claim 2 wherein the second moving comb plate is a rolled steel plate with comb teeth on one side, the tooth profile being the same as the first moving comb plate.
4. The drop-in comb plate retractor device of claim 3 wherein the stainless steel slider is connected to the static comb plate by welding.
5. The retractable device of an embedded comb plate according to claim 4, wherein the damping rubber mount is pre-compressed during assembly to pre-tighten the fastening screws.
6. The retractable system of claim 5, wherein a water stop is provided below the retractable system, the water stop being integral in the transverse direction of the deck.
7. Use method of an embedded comb plate retractor device, characterized in that a plurality of embedded comb plate retractor devices according to any of claims 1 to 6 are installed in parallel according to the bridge deck width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811361024.4A CN109338876B (en) | 2018-11-15 | 2018-11-15 | Embedded comb plate telescopic device and using method |
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| CN201811361024.4A CN109338876B (en) | 2018-11-15 | 2018-11-15 | Embedded comb plate telescopic device and using method |
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| CN109338876A CN109338876A (en) | 2019-02-15 |
| CN109338876B true CN109338876B (en) | 2020-05-22 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680605B (en) * | 2019-01-29 | 2020-09-04 | 杨胜 | Comb-tooth type bridge expansion device |
| CN110886208A (en) * | 2019-12-06 | 2020-03-17 | 武汉丰瑞桥梁科技有限公司 | Embedded reinforcing structure and method for bridge expansion device |
| CN110886210A (en) * | 2019-12-16 | 2020-03-17 | 内江师范学院 | Bridge expansion joint width adjusting device |
| CN111141627B (en) * | 2019-12-27 | 2022-10-04 | 太原理工大学 | Concrete creep test loading device considering car-induced cyclic load effect |
| CN111119038B (en) * | 2019-12-30 | 2021-12-03 | 山西省交通新技术发展有限公司 | Multi-directional displacement composite plate type expansion device for highway bridge |
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| CN206784167U (en) * | 2017-05-23 | 2017-12-22 | 成都市新筑路桥机械股份有限公司 | The board-like retractor device of new antivibration noise abatement multi-directional deflection broach |
| CN207646604U (en) * | 2017-12-12 | 2018-07-24 | 衡水双盛工程橡胶有限公司 | Leveling multi-directional deflection comb plate, comb joint bridge extension joint is turned up in unit assembled damping |
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| KR101162754B1 (en) * | 2011-09-28 | 2012-07-05 | 김석희 | Up and down movement expansion joint |
| CN202809483U (en) * | 2012-07-27 | 2013-03-20 | 柳州东方工程橡胶制品有限公司 | Concrete combination expansion device |
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| CN109338876A (en) | 2019-02-15 |
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Inventor after: Fang Rui Inventor after: Wang Zhifu Inventor after: Liu Jian Inventor after: Liang Zhicheng Inventor after: Gao Zhenyu Inventor after: Gao Yueqiu Inventor after: Zhao Pengwei Inventor after: Nie Longfei Inventor after: Zhang Dawei Inventor after: Tao Bin Inventor after: Zhang Ruibin Inventor after: Jiang Jingwei Inventor after: Li Xuhua Inventor after: Yang Suxia Inventor after: Yuan Fei Inventor before: Nie Longfei Inventor before: Shi Minqian Inventor before: Liu Jian Inventor before: Gao Zhenyu Inventor before: Zhao Min Inventor before: Li Xuhua Inventor before: Zhang Dawei Inventor before: Jiang Jingwei Inventor before: Tao Bin Inventor before: Yang Suxia Inventor before: Yuan Fei Inventor before: Wang Zhifu Inventor before: Liang Zhicheng |
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Effective date of registration: 20200429 Address after: 030006 Shanxi Province, Taiyuan city district and State Road No. 69 Applicant after: Shanxi Communications New Technology Development Co., Ltd Applicant after: SHANXI JIAOKE (MAURER) BRIDGE ACCESSORIES Co.,Ltd. Address before: 030006 No. 79 Xuefu street, Shanxi, Taiyuan Applicant before: SHANXI PROVINCIAL RESEARCH INSTITUTE OF COMMUNICATIONS |
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