CN110184907B - Steel-concrete combined bridge expansion device - Google Patents
Steel-concrete combined bridge expansion device Download PDFInfo
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- CN110184907B CN110184907B CN201910565029.7A CN201910565029A CN110184907B CN 110184907 B CN110184907 B CN 110184907B CN 201910565029 A CN201910565029 A CN 201910565029A CN 110184907 B CN110184907 B CN 110184907B
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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
Abstract
The invention discloses a steel-concrete combined bridge expansion device, which comprises a cover beam, beam bodies and a prefabricated combined expansion structure, wherein the cover beam is connected with two adjacent beam bodies, the prefabricated combined expansion structure comprises a first expansion part and a second expansion part which are symmetrically arranged relative to the central line of a bulge, a gap is formed between the first expansion part and the second expansion part to form an expansion joint, and the expansion parts are arranged on the bulge of the cover beam. Meanwhile, the annular steel bars and the anchoring steel plates are pre-embedded in the prefabricated plates, so that the durability of the prefabricated combined type telescopic structure is improved, and the construction quality and the construction efficiency are improved.
Description
Technical Field
The invention relates to the technical field of simply supported bridge structures, in particular to a steel-concrete combined bridge expansion device.
Background
The simple beam bridge is a beam bridge with two ends respectively supported on a movable support and a hinged support as main bearing structures, belongs to a static structure, is a bridge type which is applied earliest and used most widely in the beam bridge, and has the advantages of simple structure, convenient erection and no influence of foundation deformation and temperature change on the internal force of the structure.
The precast concrete beam of the simply supported beam bridge is usually supported on the shoulders at two sides of the convex concrete cover beam bulge at the top of the bridge pier, and expansion joints are respectively arranged between the cover beam bulge and precast beam bodies at two ends so as to meet the deformation of the upper structure of the bridge under the action of temperature and contraction. The existing expansion joint device is generally provided with an expansion device at the joint of the cover beam convex part and the two side beam bodies, so that the cost is greatly increased, and meanwhile, uneven deformation, pavement damage and the like are easily caused, and the vehicle bump at the bridge head is caused. The driving comfort degree is influenced by the bump at the bridge head, the impact action of the automobile load is large, the stress on the bridge is unfavorable, and the stress on the expansion device is unfavorable, so that the effective service life of the expansion joint device is greatly reduced.
How to change the current situation that uneven settlement on two sides of the concrete precast beam expansion joint easily causes bumping at the bridge head in the prior art is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a steel-concrete combined bridge expansion device, which is used for solving the problems in the prior art, relieving the bumping phenomenon at the bridge head at an expansion joint and improving the driving comfort level.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a steel-concrete combined bridge expansion device which comprises a cover beam, beam bodies and a prefabricated combined expansion structure, wherein the cover beam is connected with two adjacent beam bodies and comprises a first end part, a protruding part and a second end part which are sequentially connected, the height of the protruding part is higher than that of the first end part and that of the second end part, one end of each beam body is connected with the first end part or the second end part in an overlapping mode, the top of each beam body is flush with the top of the protruding part, and a gap is formed between each beam body and the corresponding protruding part;
the prefabricated combined type telescopic structure comprises a first telescopic part and a second telescopic part which are symmetrically arranged relative to the central line of a bulge, a gap is reserved between the first telescopic part and the second telescopic part, the first telescopic part and the second telescopic part are connected with the bulge and a beam body, the first telescopic part and the second telescopic part respectively comprise a precast slab and a connecting part, the connecting part is connected with the precast slab and the beam body, the precast slab is made of steel fiber concrete, the precast slab is provided with a pre-embedded annular steel bar and an anchoring steel plate, the anchoring steel plate is arranged at one end, far away from the connecting part, of the first telescopic part or the second telescopic part, the precast slab is further provided with a circular hole, the circular hole penetrates through the precast slab and the anchoring steel plate, and the axis of the circular hole is perpendicular to the length direction of the beam body, the circular hole is located in the inner ring of the annular reinforcing steel bar, the perforated reinforcing steel bar is arranged in the circular hole, the connecting portion is provided with connecting reinforcing steel bars, the connecting reinforcing steel bars are connected with the annular reinforcing steel bar, and the connecting portion is made in a cast-in-place mode.
Preferably, a dustproof plastic foam plate is arranged between the first telescopic part and the second telescopic part, a water stop is arranged at the bottom of the dustproof plastic foam plate, and the water stop is made of rubber materials.
Preferably, dustproof plastic foam board with set up the connection steel sheet between the anchor steel sheet, the connection steel sheet with the anchor steel sheet links to each other, the connection steel sheet with the top of anchor steel sheet sets up the swing tooth plate, the swing tooth plate with the connection steel sheet links to each other, the top surface and the bridge floor of swing tooth plate are parallel and level mutually.
Preferably, the prefabricated slab is connected with an angle steel clamp, the angle steel clamp is connected with the prefabricated slab through a bolt, and the two angle steel clamps respectively press two ends of the water stop belt on the connecting steel plate.
Preferably, sliding steel plates are arranged among the first telescopic part, the second telescopic part and the protruding parts, and graphite powder is arranged among the first telescopic part, the second telescopic part and the sliding steel plates.
Preferably, a leveling layer is arranged between the precast slab and the beam body, the leveling layer is made of mortar, and both ends of the sliding steel plate extend to the top of the beam body.
Preferably, connecting portion include post-cast strip, screed and the layer of mating formation, the screed set up in the top of the roof beam body, the screed is made by the concrete, the layer of mating formation set up in the top of screed, the layer of mating formation is made by the pitch material, post-cast strip fill in the screed the layer of mating formation the precast slab with space between the screed, the layer of mating formation the top of post-cast strip all with the bridge floor looks parallel and level, connecting reinforcement runs through the screed post-cast strip with the anchor steel sheet links to each other.
Preferably, the arc-shaped end and the top of the annular reinforcing steel bar protrude from the precast slab, and the post-cast strip is filled between the annular reinforcing steel bar and the precast slab.
Preferably, the number of the round holes is two, and the two round holes are arranged on one side of the annular reinforcing steel bar close to the protruding portion.
Compared with the prior art, the invention has the following technical effects: the invention relates to a steel-concrete combined bridge expansion device, which comprises a cover beam, beam bodies and a prefabricated combined expansion structure, wherein the cover beam is connected with two adjacent beam bodies and comprises a first end part, a protruding part and a second end part which are sequentially connected, the height of the protruding part is higher than that of the first end part and that of the second end part, one end of each beam body is connected with the first end part or the second end part in an overlapping manner, the top of each beam body is level with that of the protruding part, and a gap is formed between each beam body and the protruding part; the prefabricated combined type telescopic structure comprises a first telescopic part and a second telescopic part which are symmetrically arranged relative to the central line of a convex part, a gap is reserved between the first telescopic part and the second telescopic part, the first telescopic part and the second telescopic part are connected with the convex part and a beam body, the first telescopic part and the second telescopic part respectively comprise a prefabricated plate and a connecting part, the connecting part is connected with the prefabricated plate and the beam body, the prefabricated plate is made of steel fiber concrete, the prefabricated plate is provided with a pre-embedded annular steel bar and an anchoring steel plate, the anchoring steel plate is arranged at one end of the first telescopic part or the second telescopic part, which is far away from the connecting part, the prefabricated plate is also provided with a round hole, the round hole penetrates through the prefabricated plate and the anchoring steel plate, the axis of the round hole is vertical to the length direction of the beam body, the round hole is positioned in the inner ring of the annular steel bar, a perforated, the connecting part is made in a cast-in-place mode. According to the steel-concrete combined bridge expansion device, the gap is formed between the first expansion part and the second expansion part to form the expansion joint, the expansion parts are arranged on the protruding parts of the cover beams, and compared with the expansion joint arranged on two sides of the cover beams in the prior art, the expansion joint is reduced, the prefabricated combined expansion structure can effectively prevent uneven settlement of two sides of the expansion joint, the flatness of the prefabricated combined expansion structure is guaranteed, the bridge head jumping phenomenon at the expansion joint is reduced, the driving comfort is improved, and the durability and the service life of the expansion device are improved. Meanwhile, the annular steel bars and the anchoring steel plates are pre-embedded in the prefabricated plates, so that the durability of the prefabricated combined type telescopic structure is improved, and the construction quality and the construction efficiency are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of a steel-concrete composite bridge expansion device according to the present invention;
wherein, 1 is the bent cap, 2 is the roof beam body, 3 is the prefabricated plate, 4 is the annular reinforcing bar, 5 is the anchor steel sheet, 6 is the perforation reinforcing bar, 7 is the tie bar, 8 is dustproof plastic foam board, 9 stop water areas, 10 is the tie bar, 11 is the adjustable tooth plate, 12 is the angle steel anchor clamps, 13 is the sliding steel board, 14 is the screed-coat, 15 is the post-cast strip, 16 is the screed-coat, 17 is the layer of mating formation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a steel-concrete combined bridge expansion device, which is used for solving the problems in the prior art, relieving the bumping phenomenon at the bridge head at an expansion joint and improving the driving comfort level.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a steel-concrete composite bridge expansion device according to the present invention.
The invention provides a steel-concrete combined bridge expansion device which comprises a cover beam 1, beam bodies 2 and a prefabricated combined expansion structure, wherein the cover beam 1 is connected with two adjacent beam bodies 2, the cover beam 1 comprises a first end part, a protruding part and a second end part which are sequentially connected, the height of the protruding part is higher than that of the first end part and that of the second end part, one end of each beam body 2 is connected with the first end part or the second end part in an overlapping mode, the top of each beam body 2 is level with that of the protruding part, and a gap is formed between each beam body 2 and the protruding part.
The prefabricated combined type telescopic structure comprises a first telescopic part and a second telescopic part which are symmetrically arranged relative to the central line of a convex part, a gap is reserved between the first telescopic part and the second telescopic part, the first telescopic part and the second telescopic part are connected with the convex part and a beam body 2, the first telescopic part and the second telescopic part respectively comprise a prefabricated plate 3 and a connecting part, the connecting part is connected with the prefabricated plate 3 and the beam body 2, the prefabricated plate 3 is made of steel fiber concrete, the prefabricated plate 3 is provided with a pre-embedded annular steel bar 4 and an anchoring steel plate 5, the anchoring steel plate 5 is arranged at one end of the first telescopic part or the second telescopic part, which is far away from the connecting part, the prefabricated plate 3 is further provided with a round hole, the round hole penetrates through the prefabricated plate 3 and the anchoring steel plate 5, the axis of the round hole is vertical to the length direction of the beam body 2, the round hole is positioned in the, the perforated steel bars 6 strengthen the strength of the member and can also bear the shearing force of the bridge, the connecting parts are provided with connecting steel bars 7, the connecting steel bars 7 are connected with the annular steel bars 4, and the connecting parts are manufactured in a cast-in-place mode.
According to the steel-concrete combined bridge expansion device, the gap is formed between the first expansion part and the second expansion part to form the expansion joint, the expansion parts are arranged on the protruding parts of the cover beam 1, and compared with the expansion joint arranged on two sides of the cover beam 1 in the prior art, the expansion joint is reduced, the prefabricated combined expansion structure can effectively prevent uneven settlement of two sides of the expansion joint, the flatness of the prefabricated combined expansion structure is guaranteed, the phenomenon of bumping at the bridge head at the expansion joint is reduced, the driving comfort is improved, and the durability and the service life of the expansion device are improved. Meanwhile, the annular steel bars 4 and the anchoring steel plates 5 are pre-embedded in the precast slabs 3, so that the durability of the precast combined type telescopic structure is improved, and the construction quality and the construction efficiency are improved.
Wherein, set up dustproof foam board 8 between first pars contractilis and the second pars contractilis, dustproof foam board 8's bottom sets up waterstop 9, and waterstop 9 is made by the rubber material, prevents that outside impurity from getting into the expansion joint, avoids the roof beam body 2 to be corroded by the rainwater simultaneously.
Specifically, set up connection steel plate 10 between dustproof foam board 8 and the anchor steel plate 5, connection steel plate 10 links to each other with anchor steel plate 5, connection steel plate 10 sets up movable tooth plate 11 with the top of anchor steel plate 5, movable tooth plate 11 links to each other with connection steel plate 10, movable tooth plate 11's top surface and bridge floor looks parallel and level, dustproof foam board 8 is pressed from both sides tightly by the connection steel plate 10 of both sides, prevent the dislocation, movable tooth plate 11 sets up the wholeness that has strengthened the bridge.
In addition, the prefabricated plate 3 is connected with an angle steel clamp 12, the angle steel clamp 12 is in bolted connection with the prefabricated plate 3, the bolted connection is tight, the dismounting is convenient, the two angle steel clamps 12 respectively press the two ends of the water stop 9 on the connecting steel plate 10, and the angle steel clamps 12 on the two sides fix the water stop 9 to prevent the water stop 9 from failing. It should be noted that, in the initial state, the length of the water stop 9 between the two side angle clamps 12 is longer than the distance between the two side angle clamps 12, and in addition, the water stop 9 is made of a flexible material, so that the water stop 9 can be ensured to function when the relative position of the first telescopic part and the second telescopic part changes.
More specifically, the sliding steel plates 13 are arranged between the first telescopic part and the second telescopic part and the protruding parts, the wear resistance of the bent cap 1 is enhanced by the sliding steel plates 13, and the graphite powder is arranged between the first telescopic part and the sliding steel plates 13, so that the friction resistance is reduced, the first telescopic part and the second telescopic part can slide smoothly, and the prefabricated combined telescopic structure is ensured to play a role. In the present embodiment, the two ends of the sliding steel plate 13 extend to the tops of the two side beams 2, so that the structural strength of the whole device can be improved while the frictional resistance is reduced.
In the embodiment, a leveling layer 14 is arranged between the precast slab 3 and the beam body 2, and the leveling layer 14 is made of mortar, so that the first telescopic part and the second telescopic part can be smoothly overlapped with the beam body 2. Connecting portion include post-cast strip 15, the layer 17 of mating formation 16 and the layer of mating formation 17, the layer 16 of mating formation sets up in the top of the roof beam body 2, the layer 16 of mating formation is made by the concrete, the layer 17 of mating formation sets up in the top of layer 16 of mating formation, the layer 17 of mating formation is made by the pitch material, post-cast strip 15 is filled in the layer 16 of mating formation, the layer 17 of mating formation, the space between prefabricated plate 3 and the screed 14, the top of layer 17 of mating formation, the top of post-cast strip 15 all is parallel and level with the bridge floor mutually, connecting reinforcement 7 runs through the layer 16 of mating formation, post-cast strip 15.
Furthermore, the arc-shaped end and the top of the annular steel bar 4 protrude out of the prefabricated plate 3, the post-pouring belt 15 is filled between the annular steel bar 4 and the prefabricated plate 3, and after the pouring of the connecting part is completed, the connecting part and the prefabricated plate 3 are connected more stably through the annular steel bar 4, so that the overall structural strength is improved.
In this embodiment, the quantity of round hole is two, and two round holes set up in annular reinforcing bar 4 and are close to the one side setting of bellying, and perforation reinforcing bar 6 is close to the expansion joint setting, improves bridge structural strength.
In the construction process of the bridge, firstly, the precast slabs 3 are produced in a factory in advance (a production mode of on-site concrete pouring can also be adopted), the precast slabs 3 are installed on site, and the contact surfaces between the precast slabs 3 and the beam bodies 2 are heightened and leveled through mortar layers; then, assembling the water stop 9, fixing the water stop 9 on the precast slabs 3 at two sides of the expansion joint by using an angle iron clamp 12, welding the movable toothed plate 11 and the connecting steel plate 10, performing rust prevention treatment, preventing the dustproof plastic foam plate 8 in the expansion joint, and adjusting the movable toothed plate 11 to be flush with the surface of the bridge deck; and welding and fixing the connecting steel plate 10 and the anchoring steel plate 5, welding and fixing the annular steel bar 4 and the connecting steel bar 7, pouring the connecting part, and treating the concrete to reach the specified strength.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. The utility model provides a steel reinforced concrete combination formula bridge telescoping device which characterized in that: the combined type telescopic structure comprises a cover beam, beam bodies and a prefabricated combined type telescopic structure, wherein the cover beam is connected with two adjacent beam bodies and comprises a first end part, a protruding part and a second end part which are sequentially connected, the height of the protruding part is higher than that of the first end part and that of the second end part, one end of each beam body is in lap joint with the first end part or the second end part, the tops of the beam bodies are flush with the tops of the protruding parts, and a gap is formed between each beam body and the corresponding protruding part;
the prefabricated combined type telescopic structure comprises a first telescopic part and a second telescopic part which are symmetrically arranged relative to the central line of a bulge, a gap is reserved between the first telescopic part and the second telescopic part, the first telescopic part and the second telescopic part are connected with the bulge and a beam body, the first telescopic part and the second telescopic part respectively comprise a precast slab and a connecting part, the connecting part is connected with the precast slab and the beam body, the precast slab is made of steel fiber concrete, the precast slab is provided with a pre-embedded annular steel bar and an anchoring steel plate, the anchoring steel plate is arranged at one end, far away from the connecting part, of the first telescopic part or the second telescopic part, the precast slab is further provided with a circular hole, the circular hole penetrates through the precast slab and the anchoring steel plate, and the axis of the circular hole is perpendicular to the length direction of the beam body, the circular hole is positioned in the inner ring of the annular reinforcing steel bar, perforated reinforcing steel bars are arranged in the circular hole, the connecting part is provided with connecting reinforcing steel bars, the connecting reinforcing steel bars are connected with the annular reinforcing steel bars, and the connecting part is manufactured in a cast-in-place mode;
sliding steel plates are arranged among the first telescopic part, the second telescopic part and the protruding part, and graphite powder is arranged among the first telescopic part, the second telescopic part and the sliding steel plates;
a dustproof plastic foam plate is arranged between the first telescopic part and the second telescopic part, a water stop is arranged at the bottom of the dustproof plastic foam plate, and the water stop is made of rubber; the prefabricated plate is connected with an angle steel clamp, the angle steel clamp is connected with the prefabricated plate through a bolt, and two ends of the water stop are respectively pressed on the connecting steel plate through the two angle steel clamps; in the initial state, the length of the water stop belt between the angle steel clamps at the two sides is larger than the distance between the angle steel clamps at the two sides.
2. The steel-concrete composite bridge expansion device of claim 1, wherein: dustproof plastic foam board with set up the connection steel sheet between the anchor steel sheet, the connection steel sheet with the anchor steel sheet links to each other, the connection steel sheet with the top of anchor steel sheet sets up the adjustable toothed plate, the adjustable toothed plate with the connection steel sheet links to each other, adjustable toothed plate's top surface and bridge floor looks parallel and level.
3. The steel-concrete composite bridge expansion device of claim 1, wherein: and a leveling layer is arranged between the precast slab and the beam body and is made of mortar, and two ends of the sliding steel plate extend to the top of the beam body.
4. The steel-concrete composite bridge expansion device of claim 3, wherein: connecting portion include post-cast strip, leveling layer and the layer of mating formation, the leveling layer set up in the top of the roof beam body, the leveling layer is made by the concrete, the layer of mating formation set up in the top of leveling layer, the layer of mating formation is made by the pitch material, post-cast strip fill in the leveling layer the layer of mating formation the prefabricated plate with space between the leveling layer, the top of the layer of mating formation the top of post-cast strip all is parallel and level with the bridge floor mutually, connecting reinforcement runs through the leveling layer post-cast strip with the anchor steel sheet links to each other.
5. The steel-concrete composite bridge expansion device of claim 4, wherein: the arc-shaped end and the top of the annular steel bar protrude out of the precast slab, and the post-cast strip is filled between the annular steel bar and the precast slab.
6. The steel-concrete composite bridge expansion device according to any one of claims 1 to 5, wherein: the number of the round holes is two, and the round holes are formed in one side, close to the protruding portion, of the annular reinforcing steel bar.
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| CN201910565029.7A CN110184907B (en) | 2019-06-27 | 2019-06-27 | Steel-concrete combined bridge expansion device |
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| CN201910565029.7A CN110184907B (en) | 2019-06-27 | 2019-06-27 | Steel-concrete combined bridge expansion device |
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| CN110184907B true CN110184907B (en) | 2021-07-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111877141A (en) * | 2020-07-08 | 2020-11-03 | 唐峰 | Novel pier structure |
| CN115961544B (en) * | 2023-01-16 | 2023-08-18 | 黑龙江鑫交研桥梁科技开发有限公司 | Elastomer and assembled telescopic device suitable for middle-small span bridge |
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| CN110184907A (en) | 2019-08-30 |
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