CN109853376B - Expansion joint structure of connecting plate-abutment back wall combination and construction method thereof - Google Patents
Expansion joint structure of connecting plate-abutment back wall combination and construction method thereof Download PDFInfo
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- CN109853376B CN109853376B CN201910239403.4A CN201910239403A CN109853376B CN 109853376 B CN109853376 B CN 109853376B CN 201910239403 A CN201910239403 A CN 201910239403A CN 109853376 B CN109853376 B CN 109853376B
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- 238000010276 construction Methods 0.000 title claims description 19
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 39
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 18
- 210000001503 joint Anatomy 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 238000010025 steaming Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 239000002689 soil Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to an expansion joint structure of a connecting plate-bridge abutment back wall combination, which comprises a bridge abutment body, wherein a main beam is supported and arranged above the bridge abutment body, a bridge deck is arranged on the upper surface of the main beam, an abutting plate body positioned above the bridge abutment body is arranged at the end part of the main beam, the end part of a horizontal section of the abutting plate body is connected with the end part of the bridge deck through a reinforcing steel bar and ultra-high performance concrete connecting section, and the end part of a vertical section of the abutting plate body is connected with the bridge abutment body through the reinforcing steel bar and the ultra-high performance concrete connecting section. The expansion joint structure of the connecting plate-abutment back wall combination has simple structure.
Description
Technical Field
The invention relates to an expansion joint structure of a connecting plate-abutment back wall combination and a construction method thereof.
Background
The bridge expansion joint brings the jump and the secondary adverse effect (such as additional internal force of the structure, corrosion of the structure caused by water leakage and the like) caused by the damage of the expansion joint, which are the troublesome problems frequently encountered in the actual operation of the bridge at home and abroad at present. The car jump caused by the telescopic device not only causes great impact on the bridge, but also reduces the driving comfort level of drivers and passengers. In addition, with the increasing traffic flow, the maintenance and replacement of the expansion joint device often causes serious traffic interruption, thereby generating huge economic loss. Therefore, it is imperative to solve a series of problems caused by the expansion joint of the bridge. At present, the problem to be solved for the expansion joint generally has the following two ideas: one is to improve the telescopic device. At present, the types of the telescopic devices are many, the service life of the telescopic devices is generally within 5 years, but the maintenance and replacement problems of the telescopic devices are not thoroughly eliminated by improving the telescopic devices, so the symptoms and the root causes of the improved telescopic devices are not treated. And secondly, the problem of the expansion device is fundamentally solved, and the bridge expansion device is reduced or eliminated. Expansion joint-free bridges (hereinafter referred to as extended deck bridges) using extended deck bridge decks have been developed. An expansion joint is arranged between the main beam of the bridge deck slab and the bridge deck so as to adapt to the expansion and deformation requirements of the main beam, and the soil pressure behind the bridge deck is borne by the bridge deck back wall, but the main beam is not; the bridge deck extends backwards to be connected with the guide plate, spans over and covers an expansion joint between the main beam and the bridge abutment, and cancels the expansion device; the extension bridge deck covering the expansion joint is called a connection plate. The expansion bridge deck bridge can cancel the bridge deck expansion device under the condition of not changing the vertical simple supporting stress of the main beam, and the vertical stress and deformation characteristics of the upper structure are close to those of the conventional bridge with expansion joints, so that the expansion bridge deck expansion bridge deck is easily accepted by engineers; the structure is simple, and the construction is convenient; and the telescopic device is not provided, so that the construction, maintenance and repair cost of the telescopic device is saved, the traveling stability is improved, and the impact load of the traveling on the bridge is reduced. Because the expansion device between the bridge abutment back wall and the main girder is eliminated, the expansion amount of the girder body due to temperature deformation, concrete shrinkage creep and the like is absorbed by virtue of the combined structure of the connecting plate and the bridge abutment back wall. The temperature expansion deformation of the main beam is not transmitted to the lower structure, so that the adverse effects of complex structure-soil interaction and internal force generated by restrained deformation on the main beam are avoided. The constructable length of the extended deck slab bridge is longer than other types of expansion joint-free bridges; the requirements on the lower structure, the soil behind the platform and the surrounding soil of the pile are lower, and the application range is wider; the method is not only suitable for newly built bridges, but also suitable for seamless transformation of existing bridges, in particular to the existing bridges with lack of lower structure drawings or unknown geological data.
The combined structure of the connecting plate and the abutment back wall is a weak link of the bridge structure of the extended bridge deck. As for the structure, as the main beam is a simply supported beam, one end of the connecting plate at the bridge abutment of the extending bridge deck is connected with the main beam, and the other end is connected with the back wall of the bridge abutment and the earth filled behind the abutment, namely, the rigidity of the components connected with the two ends is asymmetric, and the stress condition is more complex. At present, a large amount of continuous beams are adopted at bridge piers to cancel expansion joints and expansion devices, and the expansion deformation of the main beam temperature is transmitted to the bridge abutment more, so that the expansion devices at the bridge abutment are more easily damaged. The connecting plate is located the rigidity abrupt change department of superstructure, not only need bear girder temperature dilatation deformation transmission and become the longitudinal bridge direction deformation, still bear girder tip rotational deformation and the concentrated force and the impact effect of wheel that vertical load produced such as car, the atress is complicated, design, construction and maintenance are improper, all can cause the fracture. Because the connecting plate is affected by the hogging moment, when the design does not have enough longitudinal steel bars to bear the impact load of the upper vehicle, the concrete of the connecting plate inevitably generates cracks. Along with the increase of the service time, diseases such as fragmentation, local pits and the like can be developed, so that not only the smoothness of the bridge deck is damaged, but also rainwater can infiltrate into the positions of a support, a bent cap and the like to cause corrosion of reinforcing steel bars and freezing and thawing damage of concrete in the bridge abutment.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an expansion joint structure of a connecting plate-abutment back wall combination and a construction method thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an expansion joint structure of connecting plate-abutment back wall combination, includes the abutment body, the top support of abutment body is provided with the girder, the upper surface of girder is provided with the decking, the tip of main girder is provided with the butt joint plate body that is located abutment body top, connect each other through reinforcing bar, ultra high performance concrete linkage segment between the horizontal segment tip of butt joint plate body and the decking tip, connect each other through reinforcing bar, ultra high performance concrete linkage segment between the vertical segment tip of butt joint plate body and the abutment body.
Preferably, a supporting seat is arranged between the main beam and the abutment body.
Preferably, a space is provided between the bridge deck end and the main beam end, and the upper surface of the main beam in the space forms a supporting plane for supporting the horizontal section of the butt plate body.
Preferably, the butt joint plate body is an L-shaped structure which is formed by a horizontal ultra-high performance concrete connecting plate and a vertical ultra-high performance concrete abutment back wall into a whole.
Preferably, the horizontal section end and the vertical section end of the butt plate body are outwards extended with first reinforcing steel bars, and the bridge deck end and the upper surface of the bridge abutment body are outwards extended with second reinforcing steel bars which are used for being welded with the first reinforcing steel bars.
Preferably, no bonding layer is arranged between the horizontal section of the butt joint plate body and the supporting plane, and the no bonding layer is also positioned below the ultra-high performance concrete connecting section of the horizontal section of the butt joint plate body.
The construction method of the expansion joint structure of the connecting plate-bridge abutment back wall combination comprises the following steps: (1) Prefabricating and pressurizing and steaming at high temperature by an abutting plate body combined by an ultra-high performance concrete connecting plate and a bridge abutment back wall, ensuring that the curing time is not lower than 15 days so as to ensure the completion of early shrinkage and creep of the ultra-high performance concrete, and embedding extension bars at the end parts of the horizontal section and the end parts of the vertical section of the abutting plate body, wherein the extension length of the bars meets the welding connection requirement; (2) Prefabricating or pouring a main beam, a bridge deck slab and a bridge abutment body on site by adopting common concrete, stretching out reinforcing steel bars at the end part of the bridge deck slab along the longitudinal bridge direction, and stretching out the reinforcing steel bars at the upper surface of the bridge abutment body along the vertical direction; (3) Arranging a support on the abutment body of the abutment, and placing the main beam on the support; (4) arranging an adhesive-free layer on the upper surface of the main beam; (5) The method comprises the steps of conveying an ultra-high performance concrete connecting plate-abutment back wall combination to a construction site in a traditional conveying mode, placing a horizontal section above a non-adhesive layer, and ensuring that the extending reinforcing bars of two end faces of the ultra-high performance concrete connecting plate-abutment back wall combination are respectively in a position capable of being welded with the extending reinforcing bars of the end parts of the bridge deck along the longitudinal bridge direction and the vertical extending reinforcing bars of the upper surface of the bridge abutment body, and welding; (6) And (3) pouring the ultra-high performance concrete connecting section on site, and combining the ultra-high performance concrete connecting plate-abutment back wall combination with the bridge deck of the main beam and the abutment body together to form an integral structure.
Preferably, in the step (5), a temporary support is required to be provided between the abutment back wall end and the abutment body for temporary support before the abutment back wall end and the reinforcement bar of the abutment body are welded.
Compared with the prior art, the invention has the following beneficial effects: the expansion joint structure of the connecting plate-bridge abutment back wall combination is simple in structure, and the connecting plate-bridge abutment back wall combination structure at the joint of the main beam and the bridge abutment is guaranteed not to generate cracks under the longitudinal bridge direction effects of temperature change, concrete shrinkage creep and the like, the main beam end rotation deformation generated by vertical loads of an automobile and the like and the concentrated force and impact effect of wheels by utilizing the tensile, bending resistance and crack resistance of the ultra-high performance concrete connecting section; the penetration of moisture into the combined structure of the connecting plate and the abutment back wall is avoided through the compactness and low porosity characteristics of the ultra-high performance concrete; improving the anti-corrosion performance and prolonging the service life of the structure.
The invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic view of the construction of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a construction state according to an embodiment of the present invention.
Fig. 3 is a second schematic view of a construction state according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a construction state according to an embodiment of the present invention.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1-4, an expansion joint structure of a connecting plate-bridge abutment back wall combination comprises a bridge abutment body 1, a main beam 2 is supported and arranged above the bridge abutment body, a bridge deck 3 is arranged on the upper surface of the main beam, an abutting plate body positioned above the bridge abutment body is arranged at the end part of the main beam, the end part of the horizontal section of the abutting plate body is connected with the end part of the bridge deck through a reinforcing steel bar and an ultrahigh-performance concrete connecting section 4, and the end part of the vertical section of the abutting plate body is connected with the bridge abutment body through the reinforcing steel bar and the ultrahigh-performance concrete connecting section.
In the embodiment of the invention, a supporting seat 5 is arranged between the main beam and the abutment body.
In an embodiment of the invention, a space is provided between the bridge deck end and the main beam end, and the upper surface of the main beam in the space forms a supporting plane for supporting the horizontal section of the butt plate body.
In the embodiment of the invention, the butt joint plate body is of an integrated L-shaped structure formed by a horizontal ultra-high performance concrete connecting plate 6 and a vertical ultra-high performance concrete abutment back wall 7.
In the embodiment of the invention, the horizontal section end part and the vertical section end part of the butt plate body are outwards extended with first steel bars 8, and the bridge deck end part and the upper surface of the bridge abutment body are outwards extended with second steel bars 9 used for being welded with the first steel bars.
In the embodiment of the invention, an adhesive-free layer 10 is arranged between the horizontal section of the butt-joint plate body and the supporting plane, and the adhesive-free layer is also positioned below the ultra-high performance concrete connecting section of the horizontal section of the butt-joint plate body, and is generally made of rubber materials.
The construction method of the expansion joint structure of the connecting plate-bridge abutment back wall combination comprises the following steps: (1) Prefabricating and pressurizing and steaming at high temperature by an abutting plate body combined by an ultra-high performance concrete connecting plate and a bridge abutment back wall, ensuring that the curing time is not lower than 15 days so as to ensure the completion of early shrinkage and creep of the ultra-high performance concrete, and embedding extension bars at the end parts of the horizontal section and the end parts of the vertical section of the abutting plate body, wherein the extension length of the bars meets the welding connection requirement; (2) Prefabricating or pouring a main beam, a bridge deck slab and a bridge abutment body on site by adopting common concrete, stretching out reinforcing steel bars at the end part of the bridge deck slab along the longitudinal bridge direction, and stretching out the reinforcing steel bars at the upper surface of the bridge abutment body along the vertical direction; (3) Arranging a support on the abutment body of the abutment, and placing the main beam on the support; (4) arranging an adhesive-free layer on the upper surface of the main beam; (5) The method comprises the steps of conveying an ultra-high performance concrete connecting plate-abutment back wall combination to a construction site in a traditional conveying mode, placing a horizontal section above a non-adhesive layer, and ensuring that the extending reinforcing bars of two end faces of the ultra-high performance concrete connecting plate-abutment back wall combination are respectively in a position capable of being welded with the extending reinforcing bars of the end parts of the bridge deck along the longitudinal bridge direction and the vertical extending reinforcing bars of the upper surface of the bridge abutment body, and welding; (6) And (3) pouring the ultra-high performance concrete connecting section on site, and combining the ultra-high performance concrete connecting plate-abutment back wall combination with the bridge deck of the main beam and the abutment body together to form an integral structure. The tensile, bending and crack resistance of the ultra-high performance concrete connecting section are utilized to ensure that the connecting plate-abutment back wall combined structure at the joint of the main beam and the abutment does not generate cracks under the longitudinal bridge direction effects such as temperature change, concrete shrinkage creep and the like, the main beam end rotation deformation generated by vertical loads such as automobiles and the like, and the concentrated force and impact effect of wheels; the penetration of moisture into the combined structure of the connecting plate and the abutment back wall is avoided through the compactness and the low void ratio characteristic of the ultra-high performance concrete; the water in the filling soil behind the abutment is prevented from entering the abutment back wall concrete to cause the steel bar to be expanded and rusted and damaged, the corrosion resistance is improved, and the service life of the structure is prolonged.
In the embodiment of the invention, in the step (5), a temporary support 11 is required to be arranged between the abutment back wall end and the abutment body for temporary support before the abutment back wall end and the reinforcing steel bar of the abutment body are welded.
The invention is not limited to the above-mentioned best mode, any person can obtain expansion joint structures of other various forms of connection plate-abutment back wall combinations and construction methods thereof under the teaching of the invention. All equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (3)
1. The utility model provides an expansion joint structure of connecting plate-abutment back wall combination, includes the abutment body, the top support of abutment body is provided with the girder, the upper surface of girder is provided with the decking, its characterized in that: the end part of the main beam is provided with an abutting plate body positioned above the abutment body, the end part of the horizontal section of the abutting plate body is connected with the end part of the abutment plate body through a reinforcing steel bar and an ultra-high performance concrete connecting section, and the end part of the vertical section of the abutting plate body is connected with the abutment body through a reinforcing steel bar and an ultra-high performance concrete connecting section; a supporting seat is arranged between the main beam and the abutment body; a space is reserved between the bridge deck end part and the main beam end part, and the upper surface of the main beam in the space forms a supporting plane for supporting the horizontal section of the butt joint plate body; the butt joint plate body is of an integrated L-shaped structure formed by a horizontal ultra-high performance concrete connecting plate and a vertical ultra-high performance concrete abutment back wall; the end parts of the horizontal section and the end parts of the vertical section of the butt plate body are outwards extended with first steel bars, and the end parts of the bridge deck and the upper surface of the bridge abutment body are outwards extended with second steel bars which are used for being welded with the first steel bars; an adhesive-free layer is arranged between the horizontal section of the butt-joint plate body and the supporting plane, and the adhesive-free layer is also positioned below the ultra-high performance concrete connecting section of the horizontal section of the butt-joint plate body.
2. A construction method of an expansion joint structure of the connection plate-abutment back wall combination according to claim 1, characterized by comprising the following steps: (1) Prefabricating and pressurizing and steaming at high temperature by an abutting plate body combined by an ultra-high performance concrete connecting plate and a bridge abutment back wall, ensuring that the curing time is not lower than 15 days so as to ensure the completion of early shrinkage and creep of the ultra-high performance concrete, and embedding extension bars at the end parts of the horizontal section and the end parts of the vertical section of the abutting plate body, wherein the extension length of the bars meets the welding connection requirement; (2) Prefabricating or pouring a main beam, a bridge deck slab and a bridge abutment body on site by adopting common concrete, stretching out reinforcing steel bars at the end part of the bridge deck slab along the longitudinal bridge direction, and stretching out the reinforcing steel bars at the upper surface of the bridge abutment body along the vertical direction; (3) Arranging a support on the abutment body of the abutment, and placing the main beam on the support; (4) arranging an adhesive-free layer on the upper surface of the main beam; (5) The method comprises the steps of conveying an ultra-high performance concrete connecting plate-abutment back wall combination to a construction site in a traditional conveying mode, placing a horizontal section above a non-adhesive layer, and ensuring that the extending reinforcing bars of two end faces of the ultra-high performance concrete connecting plate-abutment back wall combination are respectively in a position capable of being welded with the extending reinforcing bars of the end parts of the bridge deck along the longitudinal bridge direction and the vertical extending reinforcing bars of the upper surface of the bridge abutment body, and welding; (6) And (3) pouring the ultra-high performance concrete connecting section on site, and combining the ultra-high performance concrete connecting plate-abutment back wall combination with the bridge deck of the main beam and the abutment body together to form an integral structure.
3. The construction method of the expansion joint structure of the connection plate-abutment back wall combination according to claim 2, characterized in that: in the step (5), a temporary support is required to be arranged between the abutment back wall end and the abutment body for temporary support before the abutment back wall end and the reinforcing steel bar of the abutment body are welded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910239403.4A CN109853376B (en) | 2019-03-27 | 2019-03-27 | Expansion joint structure of connecting plate-abutment back wall combination and construction method thereof |
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| CN201910239403.4A CN109853376B (en) | 2019-03-27 | 2019-03-27 | Expansion joint structure of connecting plate-abutment back wall combination and construction method thereof |
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| CN109853376B true CN109853376B (en) | 2023-12-08 |
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| CN110093851B (en) * | 2019-06-20 | 2024-02-06 | 福州大学 | Approach plate structure suitable for seamless bridge and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203639813U (en) * | 2013-11-11 | 2014-06-11 | 上海应用技术学院 | Hidden type bridge expansion joint structure |
| CN204491388U (en) * | 2015-01-28 | 2015-07-22 | 福州大学 | A kind of outsourcing semi-integral bridge abutment bridge construction |
| CN107806008A (en) * | 2017-10-10 | 2018-03-16 | 山西省交通科学研究院 | A kind of integration hollow slab bridge girder construction and its construction method based on ultra-high performance concrete connection |
| CN108130856A (en) * | 2017-11-28 | 2018-06-08 | 同济大学 | Using the bridge superstructure seam of the individual layer steel bar arrangement of UHPC grouting materials |
| CN209873558U (en) * | 2019-03-27 | 2019-12-31 | 福州大学 | Expansion joint structure of connecting plate-abutment back wall combination |
-
2019
- 2019-03-27 CN CN201910239403.4A patent/CN109853376B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203639813U (en) * | 2013-11-11 | 2014-06-11 | 上海应用技术学院 | Hidden type bridge expansion joint structure |
| CN204491388U (en) * | 2015-01-28 | 2015-07-22 | 福州大学 | A kind of outsourcing semi-integral bridge abutment bridge construction |
| CN107806008A (en) * | 2017-10-10 | 2018-03-16 | 山西省交通科学研究院 | A kind of integration hollow slab bridge girder construction and its construction method based on ultra-high performance concrete connection |
| CN108130856A (en) * | 2017-11-28 | 2018-06-08 | 同济大学 | Using the bridge superstructure seam of the individual layer steel bar arrangement of UHPC grouting materials |
| CN209873558U (en) * | 2019-03-27 | 2019-12-31 | 福州大学 | Expansion joint structure of connecting plate-abutment back wall combination |
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