Dustproof expansion joint structure

Abstract

The utility model relates to the technical field of road and bridge engineering, in particular to a dustproof expansion joint structure which comprises a pair of angle steel symmetrically arranged on the two sides of the top of an expansion joint, a filling device is arranged on the inner sides of the pair of angle steel through limiting plates, and the filling device comprises a plurality of rubber filling bodies which are symmetrically stacked; the rubber filling body capable of elastically deforming is used as a partition to prevent dust and sundries from entering the expansion joint, and due to the characteristic of random elastic deformation, the expansion joint can generate certain relative displacement and deformation when the expansion joint shrinks while the expansion function of the expansion joint is not influenced, so that the expansion joint is prevented from being damaged. Dust and sundries accumulated in the expansion joint are discharged out of the expansion joint, and the self-cleaning function of the expansion joint is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of road and bridge engineering, in particular to a dustproof expansion joint structure. Background Art

[0002] Due to the property of thermal expansion and contraction of building materials, expansion joints need to be installed in bridges to offset the deformation caused by thermal expansion of bridges. Since expansion joint structures are usually installed in the open air, they are prone to accumulate various dust and debris. Dust and debris will seriously affect the performance of expansion joints. With long-term use, when dust and debris accumulate and are squeezed densely, the expansion joints will be blocked, and the expansion amount will be greatly reduced, which will seriously affect the use effect of the expansion joints and have a serious impact on driving and bridge road safety.

[0003] In order to prevent the expansion joint from being blocked, manual cleaning is usually adopted, but manual cleaning on the bridge will affect traffic and cause vehicle congestion; there is an existing patent with application number 201922088617.4, which discloses a dust-proof expansion joint of a bridge, including a pair of symmetrically arranged steel sections placed in the bridge, a dust-proof rubber strip is provided in the middle and upper part of the pair of steel sections, and a water-stop rubber strip is provided in the middle; the invention prevents rainwater, ballast and debris from entering through the dust-proof rubber strip, and the structure of the dust-proof rubber strip makes it possible for the temperature difference under seasonal changes to not affect the natural law of thermal expansion and contraction of the beam and slab; however, the dust-proof rubber strip of the patent can only prevent dust and debris from further penetrating into the expansion joint, and the dust and debris accumulated on the dust-proof rubber strip itself cannot be discharged by itself, and still requires manual cleaning. Utility Model Content

[0004] The utility model aims to provide a dustproof expansion joint structure with a self-cleaning function.

[0005] Based on the above purpose, the utility model adopts the following technical solutions:

[0006] A dustproof expansion joint structure includes a pair of symmetrically arranged angle steels, characterized in that: the pair of angle steels are respectively fixedly arranged at the top corners of the beams on both sides of the bridge expansion joint, and the two angle steels are matched in a T-shaped gap; a filling device is arranged in the gap of the pair of angle steels; the filling device includes a group of rubber filling bodies, and a pair of limit plates matching the rubber filling bodies are symmetrically arranged on the opposite side surfaces of the two angle steels.

[0007] Preferably, the rubber filler includes five filling bodies, respectively including a pair of top filling bodies and side filling bodies that are symmetrically arranged, and a bottom filling body is arranged at the bottom; the top filling body, the side filling body and the bottom filling body have different shapes, and the joints between every two adjacent filling bodies are not arranged horizontally; the five filling bodies are separately arranged and cooperate with the limiting plate to fill the gap of the expansion joint.

[0008] Preferably, the limiting plate comprises a vertical plate fixedly connected to the angle steel, and the bottom of the vertical plate is fixedly connected to a bearing plate at an obtuse angle; the gap between a pair of bearing plates is smaller than the width of the bottom filling body.

[0009] Preferably, anchor steel bars are provided on the inner side of the angle steel, and the two ends of the anchor steel bars are fixedly connected to the two inner side surfaces of the angle steel respectively; embedded steel bars are provided to cross the anchor steel bars, and the embedded steel bars are fixedly connected to the horizontal section of the anchor steel bars at ninety degrees; multiple anchor steel bars are evenly distributed along the length direction of the angle steel, and each anchor steel bar is cooperated with two embedded steel bars.

[0010] Preferably, reinforcing steel bars are arranged at the intersections of the anchoring steel bars and the embedded steel bars, and the reinforcing steel bars are respectively matched with the anchoring steel bars and the embedded steel bars at 90 degrees; the intersections of the reinforcing steel bars, the anchoring steel bars and the embedded steel bars are connected by binding.

[0011] Preferably, the beam body is provided with reserved cavities on both sides of the top of the expansion joint, and the embedded steel bars are vertically fixed on the bottom surface of the reserved cavity; the angle steels, anchor steel bars and reinforcing steel bars are all arranged in the reserved cavity, and the bridge is fixedly connected to the angle steels, anchor steel bars and reinforcing steel bars by pouring concrete in the reserved cavity.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model adopts a design of multiple rubber fillers as expansion joint filling. No connection relationship is set between the rubber fillers, so that they can produce relative deformation and sliding; as the expansion joint itself expands and contracts due to heat, the rubber filler is squeezed and deformed accordingly; in this process, due to the elasticity of the rubber, the expansion and contraction deformation of the expansion joint is not hindered, and the expansion joint can be kept filled all the time, preventing dust and debris from falling further into the expansion joint.

[0014] The utility model fills the expansion joint with the rubber filler to avoid dust accumulation. At the same time, as the rubber filler is deformed and relatively displaced, the dust and debris originally entering the expansion joint will be squeezed upward out of the expansion joint, thereby achieving a self-cleaning effect; the compacted dust and debris can also be squeezed upward to loosen them, turning them into small particles that are easy to clean and handle, which can be washed away by rainwater; it is also more convenient to use manual cleaning to clean large particles of gravel and other debris that cannot be washed away.

[0015] The utility model adopts a hot-rolled L-shaped angle steel structure. Compared with the traditional welded telescopic device, since there is no welding point, the structural integrity is greatly improved, and the bearing capacity and structural durability are greatly improved; in scenarios of long-term use such as roads and bridges, the repeated load of the vehicle is not prone to fatigue damage, and has a longer service life; at the same time, the utility model has a simple structure, is easy to construct, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side structural schematic diagram of the utility model;

[0017] Figure 2 It is an enlarged view of the filling device structure of the utility model.

[0018] In the figure: angle steel 1; limit plate 2; filling device 3; top filling body 301; side filling body 302; bottom filling body 303; anchor steel bar 4; embedded steel bar 5; reinforcing steel bar 6; concrete layer 7; pavement layer 8; beam body 9. DETAILED DESCRIPTION

[0019] This embodiment is a dustproof expansion joint structure, which is mainly used for expansion joints set up in bridges and the like. Its specific structure is as follows: Figure 1 As shown, it mainly includes an expansion joint set at the beam body 9 of the bridge; the top layer of the beam body 9 is paved with a road surface layer 8, and the expansion joint separates the beam body 9 and the road surface layer 8, so that the gaps at both ends thereof are matched.

[0020] On both sides of the expansion joint, the inner top of the beam body 9 and the inner side of the pavement layer 8, reserved cavities are provided, and the reserved cavities are filled with a concrete layer 7; an angle steel 1 is fixedly provided through the concrete layer 7; the angle steel 1 is a structure with an L-shaped cross-section, and a pair of angle steels 1 are symmetrically arranged on both sides of the expansion joint to form a T-shaped structure with a gap in the middle; the gap between the two angle steels 1 is equal to the width of the expansion joint, the height of their top surfaces is equal to the height of the pavement layer 8, and the bottom end is in contact with the bottom surface of the reserved cavity of the beam body 9.

[0021] A steel bar structure is provided on the inner side of the angle steel 1, and the angle steel 1 is fixed by the steel bar structure and the concrete layer 7; the steel bar structure includes anchor steel bars 4 fixedly connected to the inner side of the angle steel 1 by welding, and the anchor steel bars 4 are of a C-shaped structure, which includes two horizontal sections, the upper horizontal section has a turn at its end and is welded to the ground with the horizontal section of the angle steel 1, and the lower horizontal section has a welded end with the vertical section of the angle steel 1; the anchor steel bars 4 extend horizontally outwardly and are arranged in the reserved cavity, and embedded steel bars 5 are cross-coordinated on the horizontal section; the embedded steel bars 5 are steel bars that are pre-fixed and embedded in the beam body 1 in advance, and the embedded steel bars 5 are vertically fixed and inserted into the bottom of the reserved cavity of the beam body 1, so that they are cross-connected with the anchor steel bars 4 at ninety degrees; along the length direction of the angle steel 1, they are connected to the anchor steel bars 4 and the embedded steel bars 5 at the same time at ninety degrees, that is, the three steel bars are matched at three-dimensional right angles, and are tied and fixed at their intersections by wire.

[0022] In the gap between the pair of angle steels 1, a filling device 3 is provided. The specific structure of the filling device 3 is as follows: Figure 2As shown, it includes a pair of limit plates 2 fixedly arranged on the outer side of the vertical section of the angle steel 1 by welding; a pair of limit plates 2 are arranged, which are respectively fixedly welded on the opposite sides of the two angle steels 1, and are symmetrically arranged along the central axis of the expansion joint; the limit plates 2 include a vertical plate fixedly welded to the angle steel 1, and a bearing plate is obliquely arranged at the bottom of the vertical section; the bearing plate is connected to the vertical plate at an obtuse angle, so that the filling device 3 arranged on the inner side thereof can maintain a tendency to slide downward toward the center under the action of gravity.

[0023] The filling device 3 includes five rubber filling bodies, which are a pair of top filling bodies 301 symmetrically arranged at the top, side filling bodies 302 symmetrically arranged on both sides, and a bottom filling body 303 arranged at the bottom; each filling body is in direct contact with each other, and there is no gap between adjacent filling bodies; the filling bodies are not connected to each other in any way, and the top of the filling device 3 composed of five rubber filling bodies is horizontal, and the bottom shape is matched with the supporting plate part of a pair of limiting plates 2, so that the gap between the two angle steels 1 is completely filled by the filling device 3 and the limiting plates 2; the spacing width between the supporting plates of the two limiting plates 2 is smaller than the width of the bottom filling body 303, so that the bottom filling body will not fall from the gap between the limiting plates 2.

[0024] During the actual construction and installation of this embodiment, first, symmetrical reserved cavities are reserved on both sides of the expansion joint on the beam body 9 and the pavement layer 8 of the bridge for installing the dustproof structure; then embedded steel bars 5 are inserted at the bottom of the reserved cavity; the embedded steel bars 5 are buried in groups of two on each side at equal distances along the length direction of the expansion joint; the top height of the embedded steel bars 5 is slightly lower than the height of the pavement layer 8 of the bridge deck, and its embedded position matches the horizontal section of the anchor steel bar 4; then, the limit plate 2 is welded on the outer side of the angle steel 1, and the height position of the limit plates 2 on both sides is the same; then, according to the spacing of the reserved steel bars 5, the anchor steel bars 4 are welded to the inner side surface of the angle steel 1 in sequence.

[0025] After completing the processing of the above structure, the dustproof structure is installed on the beam body 9 at both ends of the expansion joint, so that its inner side surface is flush with the beam body 9, and the top surface is flush with the road surface layer 8; after the anchor steel bar 4 and the embedded steel bar 5 are cross-lapped, the reinforcing steel bar 6 is inserted along the length direction of the expansion joint, so that it is overlapped at the intersection of the anchor steel bar 4 and the embedded steel bar 5, and then the steel bar is used to tie and fix it; then according to the width of the expansion joint, five rubber filling bodies are laid in sequence between the two limit plates 2 to completely close the expansion joint; after completing the above settings, concrete 7 is poured into the reserved cavity so that the height of the concrete 7 is consistent with the height of the road surface layer 8; after the concrete 7 is solidified and formed, the construction and installation of this embodiment is completed.

[0026] In actual use, when dust and debris accumulate in the expansion joint and the bridge material expands due to heat, the beams 9 on both sides of the expansion joint expand and deform inward, reducing the width of the expansion joint; due to the inward pressure from the beams 9 and the pavement layer 8, the filling device 3 is also subjected to pressure from both sides and shrinks and deforms inward; since the bottom is limited by the bearing plate of the limiting plate 2, the two sides are limited by the angle steel 1, and no limit is set on the top, the rubber filler will deform upward, pushing the dust and debris originally accumulated thereon out of the expansion joint, avoiding clogging the expansion joint and causing increased stress on the bridge; the contact surfaces between the five rubber fillers are all inclined to reduce their resistance when they are deformed under force, and they can also return to their original position more smoothly when the bridge cools and shrinks, avoiding the filling body from falling off, flipping, etc., which affects the structural stability of the filling device 3.

[0027] The above description is only a further explanation of the present invention in combination with specific embodiments. All descriptions do not limit the protection scope of the present invention. Any changes or replacement solutions that can be easily thought of by technicians in this field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dustproof expansion joint structure, comprising a pair of symmetrically arranged angle steels, characterized in that: A pair of angle steels are respectively fixedly arranged at the top corners of the beams on both sides of the bridge expansion joint, and the two angle steels are matched in a T-shaped gap; a filling device is arranged in the gap between the pair of angle steels; the filling device includes a group of rubber filling bodies, and a pair of limit plates matching the rubber filling bodies are symmetrically arranged on the opposite side surfaces of the two angle steels.

2. The dustproof expansion joint structure according to claim 1 is characterized in that: The rubber filler includes multiple fillers, each including a pair of symmetrically arranged top fillers, a pair of symmetrically arranged side fillers below the top fillers, and a bottom filler below the side fillers; the joints between adjacent fillers are inclined; the multiple fillers cooperate with the limit plates to fill the gaps in the expansion joints.

3. The dustproof expansion joint structure according to claim 2 is characterized in that: The limiting plate comprises a vertical plate fixedly connected to the angle steel, the bottom of the vertical plate is obtuse and fixedly connected to a bearing plate; the gap between a pair of the bearing plates is smaller than the width of the bottom filling body.

4. The dustproof expansion joint structure according to claim 3 is characterized in that: Anchor steel bars are arranged on the inner side of the angle steel, and the two ends of the anchor steel bars are fixedly connected to the two inner side surfaces of the angle steel respectively; embedded steel bars are arranged crosswise with the anchor steel bars, and the embedded steel bars are vertically overlapped with the horizontal sections of the anchor steel bars; a plurality of anchor steel bars are evenly distributed along the length direction of the angle steel, and each anchor steel bar is matched with two embedded steel bars.

5. The dustproof expansion joint structure according to claim 4, characterized in that: A reinforcing steel bar is arranged at the intersection of the anchoring steel bar and the embedded steel bar, and the reinforcing steel bar is vertically matched with the anchoring steel bar and the embedded steel bar respectively; the intersection of the reinforcing steel bar, the anchoring steel bar and the embedded steel bar is fixedly connected.

6. The dustproof expansion joint structure according to claim 5, characterized in that: The beam body is provided with reserved cavities on both sides of the top of the expansion joint, and the embedded steel bars are vertically fixed on the bottom surface of the reserved cavities; the angle steels, anchor steel bars and reinforcing steel bars are all arranged in the reserved cavities, and the bridge is fixedly connected with the angle steels, anchor steel bars and reinforcing steel bars by pouring concrete in the reserved cavities.

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