CN210636309U - Novel concrete bridge deck continuous structure applied to beam bridge - Google Patents
Novel concrete bridge deck continuous structure applied to beam bridge Download PDFInfo
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- CN210636309U CN210636309U CN201920947930.6U CN201920947930U CN210636309U CN 210636309 U CN210636309 U CN 210636309U CN 201920947930 U CN201920947930 U CN 201920947930U CN 210636309 U CN210636309 U CN 210636309U
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Abstract
The utility model discloses a novel concrete bridge deck continuous structure applied to a beam bridge, which comprises a concrete slab, wherein upper, middle and lower layers of common reinforcing steel bars are arranged in the slab, the concrete slab basically presents a simply supported stress state under the action of vehicle load, and the generated bending moment is borne by the upper and lower layers of bending-resistant common reinforcing steel bars; the axial tension and compression action caused by the temperature action and the concrete shrinkage and creep is mainly born by the tensile steel bar in the middle of the concrete slab and the concrete slab together, and the stress is simple and clear, and the thickness of the slab is increased by arranging the notch on the top surface of the beam end, so that the reinforcement and the stress of the slab are reasonable, and the continuous structure stress of the bridge deck is ensured to meet the standard requirement. The utility model discloses can improve bridge floor continuous structure's atress, make bridge floor continuous structure atress simple, clear and definite, can calculate the arrangement of reinforcement according to general stretch bending or the component that bends, avoid complicated because of the atress, the arrangement of reinforcement is unreasonable, and leads to serious diseases such as bridge floor continuous structure atress fracture destruction.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, concretely relates to be applied to novel concrete bridge face continuous construction on beam bridge.
Background
The bridge deck continuous structure is a weak link of a bridge structure, and the bridge deck continuous structure at the end part of the girder is a position where the girder deforms the most under the action of vehicle load, concrete shrinkage creep and temperature load because the girder is a simply supported girder. The deformation of the main beam (elongation, shortening, upwarping and downwarping) generally causes the continuous structure of the bridge deck to generate large and complex internal forces such as pulling, pressing, bending and local pressing, which easily causes bridge deck cracking, concrete crushing and other bridge diseases, and aggravates the bridge diseases along with the increase of time, influences the service performance of the bridge and endangers the driving safety.
At present, bridge deck continuous structures commonly used in China are of various types, and common bridge deck continuous structures comprise common reinforced concrete single-slit type bridge deck continuous structures, common reinforced concrete double-slit type bridge deck continuous structures, high-performance concrete bridge deck continuous structures, high-polymer elastic material bridge deck continuous structures and the like. These common deck continuous structures each have certain advantages, but they all basically suffer from some drawbacks, such as: under the deformation of repeated tension and compression, downwarping, upwarping and the like of a beam end, the bridge deck is continuously in a tension-compression alternative stress state, and the stress process is complicated along with the local bearing of larger pressure, so that the reinforcement can not be calculated according to a general tension bending or compression bending component, and the structure is easy to stress crack due to unreasonable reinforcement distribution; except common concrete, bridge deck continuous structures made of other materials basically have the defects of high manufacturing cost, poor durability, short service life, inconvenience in construction and the like; the high molecular elastic material is inferior to concrete in corrosion resistance, durability, and the like.
In order to solve the problem of the destruction of the continuous structure of the deck, there are generally: the method adopts four modes of adopting improved seam crossing materials (such as polyacrylonitrile fiber concrete, modified epoxy concrete and the like), pasting glass fiber cloth on the upper edge (tension area) of the continuous structure of the bridge deck, reinforcing seam crossing connecting steel bars and applying seam crossing prestress, but the four modes have the defects:
1. the improved seam crossing material can change the cohesiveness and slump of concrete generally, and has higher construction requirement; and the reinforcing material is not easy to disperse uniformly and has the phenomenon of agglomeration and segregation, so that the workability of the concrete is influenced, and the quality of the concrete is difficult to ensure. Meanwhile, the adoption of the composite material can improve the construction cost.
2. The glass fiber cloth has non-adhesive property, is not easy to adhere any substance, causes quite complicated working procedures of pasting with concrete and has poor durability.
3. The reinforcing of the cross-seam connecting steel bars can improve the bending performance of the continuous bridge deck structure and further limit the relative deformation of the girder beam ends, but the bending performance of the continuous bridge deck structure is far smaller than that of the girder, so that the relative deformation of the girder beam ends cannot be obviously influenced, at the moment, under the action of external load, especially under the synergistic action of integral temperature difference and live load, due to the reinforcing of the connecting steel bars, the interaction force between the concrete of the continuous bridge deck section and the girder can be increased on the contrary, and the safety of the shear nails and the concrete structure is seriously influenced.
4. Although the bridge deck continuous section concrete can be in a compressed state by applying the seam-crossing prestress, the structure is complex, the construction is inconvenient, the shearing force between the bridge deck continuous section concrete and the main beam is increased, and the potential safety hazard is great.
Disclosure of Invention
The shortcoming that exists to present bridge floor continuous structure commonly used, the utility model provides a be applied to novel concrete bridge floor continuous structure on beam bridge has changed in the past that the bridge floor continuous structure is complicated and be difficult to the clear atress situation of analysis, makes bridge floor continuous structure atress simple, clear and definite, the analytical calculation of being convenient for confirm, can calculate the arrangement of reinforcement according to general stretch bending or the member that bends, the construction of being convenient for moreover.
The utility model provides a be applied to novel concrete bridge face continuous construction on girder bridge, includes the concrete slab of taking limb leg, this concrete slab bridge joint in two adjacent girder beam ends tops, and the gap between two adjacent girder beam ends adopts foamer or similar material to fill, and the notch has been seted up to one side that the girder top surface is close to the gap, concrete slab partially inlays promptly and locates in the notch of two adjacent girders, is equipped with upper and lower two-layer bending resistance ordinary reinforcing bar in the concrete slab, is equipped with tensile ordinary reinforcing bar or prestressed reinforcement in the middle of upper and lower two-layer, realizes reliably connecting in the concrete leveling layer that tensile ordinary reinforcing bar both ends are deep into the girder top.
Furthermore, the central lines of the limbs at the two ends of the concrete slab are respectively consistent with or coincident with the central lines of the supports of the two adjacent main beams, so that the concrete slab cannot deform greatly along with the rotation of the beam ends of the main beams.
Furthermore, the concrete slab is cast in place or prefabricated in blocks by adopting common concrete, ultrahigh-performance concrete or pre-tensioned prestressed concrete.
Furthermore, a chamfer meeting related requirements is arranged at the beam end of one side, close to the gap, of the top of the main beam, so that the local collision, extrusion and damage of the concrete plate and the beam end of the main beam can be avoided.
Furthermore, a notch with a certain depth is arranged on the top surface of the end of the main beam, the inner surface of the notch is ground flat, epoxy resin or other material coatings with similar protection functions are coated, and the surface of the coating is kept smooth; the notch is arranged to increase the thickness of the continuous plate and reserve a gap between the continuous plate and the top surface of the main beam, and the gap is adapted to the free deformation of the beam end of the main beam.
Further, inlay the concrete slab thickness of locating in the notch, can be as required according to the atress, along with the increase of girder top surface notch degree of depth and increase.
Furthermore, a foam plate (or other high-compressibility materials) with certain thickness and compressibility is arranged outside the leg positions at the bottom of the concrete plate and isolated from the top surface of the main beam, so that the phenomenon that the continuous plate is damaged due to local contact extrusion stress caused by the incongruity of the deformation of the continuous plate and the deformation of the beam end of the main beam under the action of live load of the concrete plate on a bridge can be avoided.
Furthermore, compressible water-tight materials such as rubber, plastics, modified emulsified asphalt and the like are arranged between the two ends of the concrete slab and the concrete leveling layer on the top of the main beam for isolation so as to adapt to free deformation of the beam end of the main beam and the continuous plate.
Furthermore, the tensile common steel bars are wrapped by unbonded sleeves near the joint cutting positions of the concrete slab and the concrete leveling layer so as to release the plate end bending moment of the continuous plate.
The concrete slabs in the concrete bridge deck continuous structure of the utility model can adopt the in-situ casting or block prefabrication installation structure of common reinforced concrete, ultra-high performance concrete and prestressed concrete which is firstly tensioned; under the action of vehicle load, the concrete slab is basically in a simply supported stress state, and the generated bending moment is borne by the upper-layer bending-resistant steel bars and the lower-layer bending-resistant steel bars; the axial tension and compression action caused by the temperature action and the concrete shrinkage and creep is mainly born by the tensile steel bar in the middle of the concrete slab and the concrete slab together, and the stress is simple and clear, and the thickness of the slab is increased by arranging the notch on the top surface of the beam end, so that the reinforcement and the stress of the slab are reasonable, and the continuous structure stress of the bridge deck is ensured to meet the standard requirement; other structural steel bars can be configured with corresponding common steel bars and prestressed steel bars according to material characteristics.
Based on the technical scheme, the utility model discloses following beneficial technological effect has:
1. the center of the continuous concrete slab limb legs of the bridge deck of the utility model is consistent with the center of the main beam support, and can not generate large deformation along with the rotation of the main beam end; the bottom of the concrete plate with continuous bridge deck is provided with a foam plate (or other materials) with certain thickness, and the top surface of the end part of the main beam is provided with a chamfer, so that the contact extrusion damage caused by the deformation of the concrete plate and the end of the main beam can be avoided.
2. The continuous concrete slabs on the bridge deck of the utility model are simply and definitely stressed, under the action of vehicle load, the concrete slabs are basically in a stressed state that the lower edges of the simply supported slabs are pulled, and the beam end notch enables the concrete slabs to have enough plate thickness and reasonable reinforcing bars to bear the vehicle load; the axial tension and compression action caused by the temperature action and the concrete shrinkage and creep is mainly born by the middle tensile steel bar of the concrete slab and the concrete slab together; the serious diseases such as cracking damage and the like caused by complicated stress and unreasonable reinforcement of a common bridge deck continuous structure are avoided.
3. The utility model discloses bridge floor continuous structure can prefabricated installation, also can cast in situ, can be according to bridge characteristics and construction conditions, the suitable material of free choice and appropriate construction process.
Drawings
FIG. 1 is a schematic view of the concrete bridge deck of the present invention.
FIG. 2 is a schematic plan view of the concrete bridge deck continuous structure of the present invention.
FIG. 3 is a schematic cross-sectional view of the concrete bridge deck continuous structure of the present invention.
In the figure: the concrete slab comprises 1-tensile common steel bars, 2-unbonded sleeves, 3-plastic plates, 4-foaming agents, 5-concrete plates, 6-foam plates, 7-bending-resistant common steel bars, 8-asphalt concrete pavement, 9-waterproof layers, 10-concrete leveling layers and 11-main beams.
Detailed Description
To describe the present invention more specifically, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 3, the novel concrete bridge deck continuous structure applied to a girder bridge of the present invention comprises a concrete slab 5 with legs, tensile ordinary steel bars 1, bending ordinary steel bars 7, unbonded sleeves 2, a plastic slab 3 with high compressibility and a foam slab 6; wherein the concrete slab 5 is arranged on top of the main beam 11; limbs and legs are arranged at two ends of the concrete slab 5; the thickness of the concrete slab 5 is increased by increasing the depth of the notch formed on the top surface of the end part of the main beam 11 according to the stress requirement; the central lines of the two limbs of the concrete plate 5 are consistent with or coincident with the central line of the main beam 11 support; the top surface of the end part of the main beam 11 is provided with a chamfer; gaps between the ends of the adjacent main beams 11 are filled with foaming agents 4; in the length range of the concrete slab, the top of the main beam 11 is provided with a notch, the inner surface of the notch is ground flat, an epoxy resin coating is coated on the notch to serve as a waterproof layer, and the top surface of the coating is a smooth plane; a foam plate 6 with a certain thickness is arranged at the bottom of the concrete plate 5 except the limb and leg; the upper part and the lower part in the concrete slab 5 are provided with anti-bending common steel bars 7; the middle of the concrete slab 5 is provided with a tensile common steel bar 1, and two ends of the tensile common steel bar 1 are inserted into the concrete leveling layer 10 at the top of the main beam 11 and are reliably connected; the joints between the two ends of the concrete slab 5 and the concrete leveling layer 10 of the main beam 11 are respectively provided with a plastic slab 3 with higher compressibility.
The concrete slab 5 can be concrete, ultra-high performance concrete, pre-tensioned pre-stressed cast-in-place (precast) concrete structure or other structure with durability and physical and mechanical properties not lower than the design requirements.
The upper and lower parts of the concrete slab 5 are provided with anti-bending common steel bars 7, the middle part is provided with tensile common steel bars 1, the tensile common steel bars 1 are wrapped by non-adhesive sleeves 2 near the joint position of the concrete slab 5 and the concrete leveling layer 10, other parts are in an adhesive form, and the two ends of the tensile common steel bars 1 penetrate into the concrete leveling layer 10 at the tops of the main beams 11 at the two sides and meet the requirement of anchoring length.
The centers of the limbs and the legs of the concrete plates 5 with continuous bridge deck are consistent with or coincident with the center of the main beam 11 support, so that the large deformation cannot occur along with the rotation of the beam end of the main beam 11; the bottom of the concrete plate 5 is provided with a foam plate 6 with a certain thickness, and the top surface of the end part of the main beam 11 is provided with a chamfer, so that the local collision, extrusion and damage of the concrete plate 5 and the beam end of the main beam 11 can be avoided.
The concrete slab 5 is a common reinforced concrete structure, the upper layer common steel bar, the middle layer common steel bar and the lower layer common steel bar are arranged in the slab, under the action of vehicle load, the concrete slab 5 is basically in a simply supported stress state, and the generated bending moment is borne by the upper layer bending-resistant common steel bar 7 and the lower layer bending-resistant common steel bar 7; the axial tension and compression action caused by the temperature action and the concrete shrinkage and creep is mainly born by the common tensile steel bar 1 in the middle of the concrete slab 5 and the concrete slab 5, and the stress is simple and clear, and the thickness of the slab is increased by arranging the notch on the top surface of the beam end, so that the reinforcement and the stress of the slab are reasonable, and the stress of the continuous structure of the bridge deck is ensured to meet the standard requirement.
Gaps between the adjacent main beams 11 are filled with the foaming agent 4, and the foaming agent 4 is light in weight, low in strength, convenient to construct, convenient for cast-in-place of the concrete slab 5 and free of changing the simply supported stress state of the main beams 11.
As shown in figure 1, the concrete construction process of the concrete bridge deck continuous structure of the utility model is as follows:
(1) firstly, grinding the top surface notch of a bridge girder 11 (the girder can be a precast or cast-in-place structure such as a hollow slab, a short T beam, a small box beam, a T beam, a superposed T beam and the like) in the range from A to B, brushing an epoxy resin coating on the top surface of the girder 11 in the range from A to B, wherein the top surface of the coating is a smooth plane, then filling gaps between beam ends with a foaming agent 4 in succession, placing a foam plate 6 on the epoxy resin coating of the beam ends, and placing a plastic plate 3 at the end part of a concrete plate 5.
(2) And (3) installing upper and lower anti-bending common steel bars 7 for binding the concrete slabs 5 at continuous positions of the bridge floor, installing middle tensile common steel bars 1 and unbonded sleeves 2, and pouring the concrete slabs 5.
(3) After the strength and the elastic modulus of the concrete meet the standard requirements, the concrete leveling layer 10 on the top of the girder 11 is poured, and the exposed part of the bending-resistant common steel bar 1 of the concrete slab 5 is wrapped in the concrete leveling layer 10 to form reliable connection.
(4) The waterproof layer 9 and the asphalt concrete pavement layer 8 are formed on the concrete leveling layer 10 and the top of the concrete slab 5.
The utility model discloses can improve the atress of bridge floor continuous structure, make bridge floor continuous structure atress simple, clear and definite, can calculate the arrangement of reinforcement according to general stretch bending or the component of bending, be convenient for installation and construction moreover, be applicable to the bridge of the certain span within range of simply supported structure.
The foregoing description of the embodiments is provided to enable one of ordinary skill in the art to make and use the invention, and it is to be understood that other modifications of the embodiments, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications to the present invention according to the disclosure of the present invention within the protection scope of the present invention.
Claims (9)
1. The utility model provides a be applied to novel concrete bridge face continuous construction on beam bridge which characterized in that: the concrete slab comprises a concrete slab with limb legs, the concrete slab is bridged at the tops of two adjacent girder ends, a gap between the two adjacent girder ends is filled with a foaming agent, one side of the top surface of the girder, which is close to the gap, is provided with a notch, the concrete slab is partially embedded in the notches of the two adjacent girders, an upper layer and a lower layer of bending-resistant common reinforcing steel bars are arranged in the concrete slab, a tensile common reinforcing steel bar or a prestressed reinforcing steel bar is arranged between the upper layer and the lower layer, and the two ends of the tensile common reinforcing steel bar penetrate into the concrete leveling layer at the tops of the.
2. A novel concrete deck continuous construction according to claim 1, characterised in that: the central lines of limbs at the two ends of the concrete slab are respectively consistent with or coincident with the central lines of the supports of the two adjacent main beams.
3. A novel concrete deck continuous construction according to claim 1, characterised in that: the concrete slab is cast in situ or prefabricated in blocks by adopting common concrete, ultrahigh-performance concrete or pre-tensioned prestressed concrete.
4. A novel concrete deck continuous construction according to claim 1, characterised in that: and a chamfer is arranged at the beam end of one side, close to the gap, of the top of the main beam.
5. A novel concrete deck continuous construction according to claim 1, characterised in that: the top surface of the end of the main beam is provided with a notch with a certain depth, the inner surface of the notch is ground flat, epoxy resin is coated, and the surface of the coating is kept smooth.
6. A novel concrete deck continuous construction according to claim 1, characterised in that: the concrete slab thickness of inlaying in the notch according to the atress needs, increases along with the increase of girder top surface notch degree of depth.
7. A novel concrete deck continuous construction according to claim 1, characterised in that: and foam boards with certain thickness and compressibility are arranged outside the positions of the legs except the legs at the bottom of the concrete slab and are isolated from the top surface of the main beam.
8. A novel concrete deck continuous construction according to claim 1, characterised in that: and compressible water-tight materials are arranged between the two ends of the concrete slab and the concrete leveling layer at the top of the main beam.
9. A novel concrete deck continuous construction according to claim 1, characterised in that: the tensile common steel bar is wrapped by a non-adhesive sleeve near the joint cutting position of the concrete slab and the concrete leveling layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920947930.6U CN210636309U (en) | 2019-06-21 | 2019-06-21 | Novel concrete bridge deck continuous structure applied to beam bridge |
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| CN201920947930.6U CN210636309U (en) | 2019-06-21 | 2019-06-21 | Novel concrete bridge deck continuous structure applied to beam bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130220A (en) * | 2019-06-21 | 2019-08-16 | 浙江省交通规划设计研究院有限公司 | A kind of new concrete bridge floor continuous structure applied on beam bridge |
| CN115404762A (en) * | 2022-10-10 | 2022-11-29 | 上海市政工程设计研究总院（集团）有限公司 | Pier top longitudinal continuous structure of assembled beam bridge and construction method thereof |
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2019
- 2019-06-21 CN CN201920947930.6U patent/CN210636309U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130220A (en) * | 2019-06-21 | 2019-08-16 | 浙江省交通规划设计研究院有限公司 | A kind of new concrete bridge floor continuous structure applied on beam bridge |
| CN110130220B (en) * | 2019-06-21 | 2024-03-05 | 浙江数智交院科技股份有限公司 | Novel concrete bridge surface continuous structure applied to beam bridge |
| CN115404762A (en) * | 2022-10-10 | 2022-11-29 | 上海市政工程设计研究总院（集团）有限公司 | Pier top longitudinal continuous structure of assembled beam bridge and construction method thereof |
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Address after: No.928 yuhangtang Road, Xihu District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang shuzhijiaoyuan Technology Co.,Ltd. Address before: 310006 No. 89 West Ring Road, Zhejiang, Hangzhou Patentee before: ZHEJIANG PROVINCIAL INSTITUTE OF COMMUNICATIONS PLANNING DESIGN & RESEARCH Co.,Ltd. |