CN114775425A - Bridge deck plate assembly, fabricated composite bridge and construction method thereof - Google Patents
Bridge deck plate assembly, fabricated composite bridge and construction method thereof Download PDFInfo
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- CN114775425A CN114775425A CN202210424857.0A CN202210424857A CN114775425A CN 114775425 A CN114775425 A CN 114775425A CN 202210424857 A CN202210424857 A CN 202210424857A CN 114775425 A CN114775425 A CN 114775425A
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- 238000010276 construction Methods 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims description 32
- 239000004567 concrete Substances 0.000 claims abstract description 43
- 230000003014 reinforcing effect Effects 0.000 claims description 99
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 108010001267 Protein Subunits Proteins 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 description 18
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 16
- 238000009826 distribution Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009415 formwork Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a bridge deck assembly, an assembled combined bridge and a construction method thereof. The deck slab assembly includes: the bridge deck slab comprises a plurality of prefabricated bridge deck slab units, connecting units and post-cast concrete, each prefabricated bridge deck slab unit comprises a deck slab part, extending parts and connecting parts, the upper ends of the extending parts are connected with the deck slab parts through the connecting parts, at least parts of the extending parts of two adjacent prefabricated bridge deck slab units are arranged oppositely, inter-slab joints are formed between the prefabricated bridge deck slab units, the connecting units are used for connecting the connecting parts corresponding to the two opposite extending parts, and the post-cast concrete is filled in the inter-slab joints. According to the bridge deck plate assembly provided by the embodiment of the invention, the corresponding connecting parts on the two prefabricated bridge deck plate units with the opposite extending parts are indirectly connected through the connecting units and filled in joints between the plates through the post-cast concrete, and the connecting units are simple to assemble and convenient to adjust and assemble, so that the construction difficulty of the bridge deck plate assembly is favorably reduced, and the construction speed of the bridge deck plate assembly is improved.
Description
Technical Field
The invention relates to the field of fabricated composite bridges, in particular to a bridge deck assembly, a fabricated composite bridge and a construction method of the fabricated composite bridge.
Background
The steel-concrete composite bridge is a beam bridge formed by connecting a steel beam with a reinforced concrete slab through a connecting piece. At present, the bridge deck of the steel-concrete composite bridge is usually constructed in a construction mode of factory block prefabrication and field assembly, the block prefabricated bridge deck is connected by wet joints on the field, and the wet joints are weak in stress and the most fussy parts for construction.
In the related technology, the wet joint mostly adopts mutual lap joint or welding force transmission of the reinforcing steel bars extending out of the end part of the prefabricated bridge deck, in the construction process of the prior art, the problem of position conflict between the reinforcing steel bars and connecting pieces often occurs to the reinforcing steel bars extending out of the end part of the prefabricated bridge deck, and the site adjustment of the positions of the extending reinforcing steel bars is a very tedious step in the construction, and influences the construction speed.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the above-mentioned technical problems of the prior art. To this end, a first object of the present invention is a deck plate assembly that allows to increase the construction speed of the deck plate assembly.
A second object of the invention is a fabricated composite bridge having the above-described deck plate assembly.
The third purpose of the invention is to provide a construction method of the fabricated composite bridge.
To achieve the above object, a first aspect of the present invention provides a bridge deck assembly, including: the prefabricated bridge deck units comprise deck plates, extension parts and connecting parts, the extension parts are connected to the sides of the deck plates, the thickness of each extension part is smaller than that of each deck plate, the upper ends of the extension parts are connected with the deck plates through the connecting parts, the extension parts of two adjacent prefabricated bridge deck units are at least partially arranged oppositely, and an inter-deck seam is formed between the prefabricated bridge deck units; the connecting unit is used for connecting the connecting parts corresponding to the two opposite extending parts; and post-cast concrete filled in the joints among the plates.
According to the bridge deck plate assembly provided by the embodiment of the invention, the corresponding connecting parts on the two prefabricated bridge deck units with the opposite extending parts are indirectly connected through the connecting units, and joints between the plates are filled with post-cast concrete.
According to some embodiments of the invention, the inter panel seam comprises a first inter panel seam; the deck slab assembly having a first direction, the extension comprising a first extension section extending in the first direction, the connection comprising a first connection section by which an upper end of the first extension section is connected to the panel section, the first extension sections of two adjacent prefabricated deck panel units being disposed opposite and spaced apart in the first direction to form the first inter-panel joint; the connecting unit comprises a first connecting sub-unit, the first connecting sub-unit is arranged at the seam between the first plates and is used for connecting the first connecting sub-units corresponding to the two first extending sub-units opposite to each other in the first direction; the post-cast concrete is filled in the joint between the first plates.
According to some embodiments of the invention, the inter-panel seams comprise a second inter-panel seam; the deck panel assembly having a second direction, the extension comprising a second extension section extending in the second direction, the connection comprising a second connection section by which an upper end of the second extension section is connected to the panel section, the second extension sections of two adjacent prefabricated deck panel units abutting in the second direction to form the second inter-panel joint; the connecting unit comprises a second connecting sub-unit which is used for connecting the second connecting sub-units corresponding to the two second extending sub-units opposite to each other in the second direction; and the post-cast concrete is filled in the joint between the second plates.
According to some embodiments of the invention, the first extension subsection is provided with at least one first extension groove having a first upper surface and a first outer side surface, the first extension groove penetrating to the first outer side surface in the first direction and extending to the first upper surface in a thickness direction of the first extension subsection, the first extension groove having a groove depth smaller than a thickness of the first extension subsection such that the first extension subsection forms a plurality of connected first extension subsections, the first connection subsection including a plurality of first reinforcing bars, and an upper end of at least a part of the first extension subsection being connected to the panel section by the first reinforcing bars.
Further, the first connection sub-unit comprises a first annular reinforcing steel bar extending along the first direction and a longitudinal reinforcing steel bar extending along the second direction, the first annular reinforcing steel bar is arranged in two first extending grooves opposite to each other in the first direction, and the longitudinal reinforcing steel bar is suitable for being connected with the first annular reinforcing steel bar and/or the first reinforcing steel bar.
Further, the side wall of the first extension groove is an uneven rough surface.
According to some embodiments of the invention, the second extension subsection is provided with at least one second extension groove, the second extension subsection having a second upper surface and a second outer side surface, the second extension groove penetrating in the second direction to the second outer side surface and extending in a thickness direction of the second extension subsection to the second upper surface, the second extension groove having a groove depth smaller than the thickness of the second extension subsection such that the second extension subsection forms a plurality of connected second extension sub-subsections, the second connection subsection comprising a plurality of second reinforcing bars, and at least a part of an upper end of the second extension sub-subsection being connected to the panel section by the second reinforcing bars.
Further, the second connection sub-unit comprises a second annular reinforcing steel bar extending along the second direction and a transverse reinforcing steel bar extending along the first direction, the second annular reinforcing steel bar is arranged in two second extending grooves opposite to each other in the second direction, and the transverse reinforcing steel bar is suitable for being connected with the second annular reinforcing steel bar and/or the second reinforcing steel bar.
Further, the side wall of the second extension groove is an uneven rough surface.
In order to achieve the above object, a second aspect of the present invention provides a fabricated composite bridge, including: the prefabricated bridge deck unit is at least partially lapped on the steel main beam.
According to the fabricated composite bridge provided by the embodiment of the invention, at least part of the prefabricated bridge deck units are lapped on the steel main beam, the corresponding connecting parts on the two prefabricated bridge deck units with opposite extension parts are indirectly connected through the connecting units, and joints between the plates are filled with post-cast concrete.
In order to achieve the above object, a third aspect of the present invention provides a construction method of a fabricated composite bridge, where the construction method is applied to the fabricated composite bridge of the above embodiment, and the construction method includes the following steps: manufacturing the prefabricated bridge deck unit: manufacturing the prefabricated bridge deck unit by using reinforced concrete; erecting the prefabricated bridge deck unit: erecting the prefabricated bridge deck units on the steel main beams; installing the connecting unit: connecting the connecting parts corresponding to the two opposite extending parts through the connecting unit; pouring the joints between the plates: and (5) pouring concrete to compact the joints among the plates.
According to the construction method of the assembled type combined bridge, the problem of steel bar conflict at the joint when the prefabricated bridge deck units are assembled is solved while joint connection strength is guaranteed, and the assembling construction difficulty of the assembled type combined bridge is low, so that the construction speed of the assembled type combined bridge is favorably improved, and the rapid construction of the assembled type combined bridge can be realized.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a deck plate assembly and a steel main beam according to an embodiment of the present invention;
FIG. 2 is a schematic view of a prefabricated bridge deck unit according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a plurality of prefabricated bridge deck units, connection units, and steel girders after assembly according to an embodiment of the invention;
FIG. 4 is a schematic view of the internal structure of the deck panel assembly at a first interplate joint;
FIG. 5 is a schematic view of the internal structure of the deck panel assembly at a second interplate joint;
FIG. 6 is an exploded view of a deck plate assembly and steel girders according to an embodiment of the invention;
FIG. 7 is a schematic view of FIG. 6 at a-a;
FIG. 8 is a schematic view of FIG. 6 at b-b;
fig. 9 is a flowchart of a construction method of a fabricated composite bridge according to an embodiment of the present invention.
Reference numerals:
prefabricated bridge deck unit 1, deck section 11, extension 12, first extension section 121, first extension slot 1211, first extension sub-section 1212, first extension distribution rib 1213, second extension section 122, second extension slot 1221, second extension sub-section 1222, second extension distribution rib 1223, connection 13, first connection section 131, first reinforcement 1311, second connection section 132, second reinforcement 1321, inner reinforcement 14, connection unit 2, first connection sub-unit 21, first ring reinforcement 211, longitudinal reinforcement 212, first reinforcement 2121, first distribution rib 2122, second connection sub-unit 22, second ring reinforcement 221, transverse reinforcement 222, second shear reinforcement 2221, second distribution rib 2222, post cast concrete 3, bridge deck assembly 10, main steel beam 20, shear connection 201, fabricated composite bridge 100.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A bridge deck assembly 10 and a fabricated composite bridge 100 according to embodiments of the present invention and a construction method thereof will be described in detail with reference to fig. 1 to 9.
In some embodiments of the present invention, the first direction and the second direction may be different directions parallel to the bearing surface of the bridge deck assembly 10, for example, the first direction is a left-right direction, and the second direction is a front-back direction, and further, in the bridge deck assembly 10 and the fabricated composite bridge 100, the transverse direction of each structural member may be a left-right direction, the longitudinal direction may be a front-back direction, and the vertical direction may be an up-down direction.
Referring to fig. 1-3, a deck plate assembly 10 includes: a plurality of prefabricated decking units 1, linkage unit 2 and post-cast concrete 3, wherein:
The extension parts 12 of two adjacent prefabricated bridge deck units 1 are at least partially arranged oppositely, and an inter-slab joint is formed between a plurality of prefabricated bridge deck units 1. It will be appreciated that the extensions 12 may be attached to at least one of the front, rear, left and right sides of the deck section 11, and that for two adjacent prefabricated bridge deck units 1, their respective extensions 12 may be partially or fully opposed, and that an inter-deck seam may be formed in the area where the two extensions 12 are opposed.
The connecting units 2 can be arranged at the joints between the plates, the connecting units 2 are used for connecting the connecting parts 13 corresponding to the two opposite extending parts 12, so that the connecting parts 2 form connection at the positions, opposite to the extending parts 12, of the prefabricated bridge deck units 1 and form a force transmission structure to ensure the connecting strength of the joints between the plates, and the post-cast concrete 3 is filled in the joints between the plates so as to integrally connect the prefabricated bridge deck units 1.
It can be understood that, because the connecting portion 13 on the prefabricated bridge deck unit 1 does not extend out towards the prefabricated bridge deck unit 1 on the opposite side, in the construction process of assembling the bridge deck plate assembly 10, the connecting portion 13 does not collide with the structure (such as the shear connector 201) between two prefabricated bridge deck units 1, thereby being beneficial to reducing the construction difficulty of assembling the bridge deck plate assembly 10, meanwhile, the connecting portions 13 on two opposite prefabricated bridge deck units 1 are indirectly connected through the connecting unit 2, the connecting unit 2 is simple to assemble, and is convenient to adjust and assemble, and the problems of position collision and the like caused by the direct connection of the connecting portions 13 on the opposite prefabricated bridge deck units 1 can be avoided, so as to further reduce the construction difficulty of the bridge deck plate assembly 10 during assembly.
According to the bridge deck assembly 10 provided by the embodiment of the invention, the corresponding connecting parts 13 on the two prefabricated bridge deck units 1 with the opposite extending parts 12 are indirectly connected through the connecting units 2 and filled in seams between the plates through the post-cast concrete 3, and the connecting units 2 are simple to assemble and convenient to adjust and assemble, so that the construction difficulty of the bridge deck assembly 10 is reduced, and the construction speed of the bridge deck assembly 10 is increased.
In some embodiments of the invention, as illustrated with reference to fig. 1-4, the deck plate assembly 10 has a first direction, which may be a left-right direction, the inter-panel joints comprise first inter-panel joints, the extension 12 comprises a first extension part 121 extending in the first direction, the connection 13 comprises a first connection part 131, the upper end of the first extension part 121 is connected with the panel part 11 by the first connection part 131, in the first direction, the first extension parts 121 of two adjacent prefabricated bridge deck units 1 are oppositely arranged and spaced apart to form a first inter-board joint, the connecting unit 2 comprises a first connecting sub-unit 21, the first connecting sub-unit 21 is arranged at the first inter-board joint, the first connecting sub-unit 21 is used for connecting the first connecting parts 131 corresponding to the two first extension parts 121 opposite to each other in the first direction, and the post-cast concrete 3 is filled in the first inter-board joint.
It will be appreciated that in the first direction, two adjacent prefabricated deck units 1 may be spaced apart, i.e., the first extension sections 121 of two adjacent prefabricated deck units 1 are spaced apart in the left and right direction, so that the shear connectors 201 and the like are provided at the first inter-plate joints, and the shear connectors 201 are fixed to the steel girders 20 supporting the deck plate assembly 10, thereby increasing the connection strength of the steel girders 20 of the deck plate assembly 10 after the post-cast concrete 3 is filled in the first inter-plate joints.
In some embodiments of the present invention, each first extension subsection 121 may be at least partially overlapped with the steel main beam 20, and the first inter-slab joint is located above the steel main beam 20, so that when the post-cast concrete 3 is cast and filled in the first inter-slab joint, the lower end of the first inter-slab joint is ensured not to leak slurry without using a formwork, thereby realizing rapid construction.
In some embodiments of the invention, referring to fig. 1-5, the bridge deck assembly 10 has a second direction, the second direction may be perpendicular to the first direction, the second direction may be a front-back direction, the extension 12 includes a second extension portion 122 extending along the second direction, the inter-deck seam includes a second inter-deck seam, the connecting portion 13 includes a second connecting portion 132, an upper end of the second extension portion 122 is connected with the deck portion 11 through the second connecting portion 132, in the second direction, the second extension portions 122 of two adjacent prefabricated bridge deck units 1 are butted to form a second inter-deck seam, the connecting unit 2 includes a second connecting sub-unit 22, the second connecting sub-unit 22 is used for connecting the second connecting portion 132 corresponding to the two second extension portions 122 opposite in the second direction, and the post-cast concrete 3 is filled in the second inter-deck seam.
It can be understood that, in the second direction, the second extension subsections 122 of two adjacent prefabricated bridge deck units 1 are butted, a second inter-slab joint is formed above the butted second extension subsections 122, and when the post-cast concrete 3 is poured and filled in the second inter-slab joint, the lower ends of the second inter-slab joint cannot leak slurry without using a formwork, so that rapid construction is realized.
In some embodiments of the present invention, the second direction may be a front-to-back direction, the second direction may be the same as the direction in which the main steel beams 20 extend, and the second inter-plate joint may be at least partially offset from the main steel beams 20.
In some embodiments of the present invention, referring to fig. 1 to 8, the first extension portion 121 is provided with at least one first extension groove 1211, the extension direction of the first extension groove 1211 may be a first direction, a plurality of first extension grooves 1211 may be spaced apart in a second direction, a distance between any two adjacent first extension grooves 1211 may be equal, the first extension portion 121 has a first upper surface and a first outer side surface, the first outer side surface may be a vertical side of the first extension portion 121 away from the panel portion 11, the first extension groove 1211 penetrates through to the first outer side surface in the first direction, and the first extension groove 1211 extends to the first upper surface in a thickness direction of the first extension portion 121, that is, the first extension groove 1211 is opened upward, the first extension groove 1211 is also opened in the first direction, so as to facilitate installation of the first connection portion unit 21, and further facilitate increasing a bonding area of the post-cast concrete 3 and the first extension portion 121, the effect of bonding the post-cast concrete 3 to the first extension portion 121 is improved.
The depth of the first extension groove 1211 is smaller than the thickness of the first extension subsection 121, so that the first extension subsection 121 forms a plurality of connected first extension subsections 1212, and the bottoms of the connected first extension subsections 1212 are connected, so that when the post-cast concrete 3 is poured and filled in the first inter-plate joint, slurry leakage from the bottom of the first extension subsection 121 can be avoided without using a formwork, and rapid construction can be realized.
The first connection subsection 131 includes a plurality of first reinforcing bars 1311, at least a portion of the upper end of the first extension sub-subsection 1212 is connected to the panel portion 11 through the first reinforcing bars 1311 to ensure the connection strength of the first extension sub-subsection 1212 and the panel portion 11, the plurality of first reinforcing bars 1311 may be spaced apart in the second direction, the first reinforcing bars 1311 and the inner reinforcing bars 14 of the prefabricated bridge deck unit 1 are integrally formed, or the first reinforcing bars 1311 are connected to the inner reinforcing bars 14 of the prefabricated bridge deck unit 1, the inner reinforcing bars 14 are located inside the prefabricated bridge deck unit 1, and the inner reinforcing bars 14 may be a plurality of reinforcing bars staggered in the transverse and longitudinal directions.
In some embodiments of the invention, as shown in fig. 4 and 6, the first extension sub 121 is provided with at least one first extension distribution rib 1213 at the bottom of the first extension slot 1211, the first extension distribution rib 1213 may extend in the second direction, and the first extension distribution rib 1213 may be connected with the inner reinforcement bar 14 and/or the first reinforcement bar 1311 to improve the load-bearing capacity of the first extension sub 121.
In some embodiments of the present invention, referring to fig. 2-4 and 6, the first coupling sub-unit 21 includes a first loop-shaped reinforcing bar 211 extending in a first direction and a longitudinal reinforcing bar 212 extending in a second direction, the first loop-shaped reinforcing bar 211 may be a closed loop-shaped reinforcing bar having a shape of a rectangle, a circle, an ellipse, a polygon, etc., the first loop-shaped reinforcing bar 211 is disposed in two first extension grooves 1211 opposite in the first direction, that is, both ends of the first loop-shaped reinforcing bar 211 may be disposed in the two first extension grooves 1211 opposite in the first direction, the first extension grooves 1211 may provide positioning for the first loop-shaped reinforcing bar 211 to facilitate assembly of the first loop-shaped reinforcing bar 211, the longitudinal reinforcing bar 212 may be adapted to be coupled to the first loop-shaped reinforcing bar 211 and/or the first reinforcing bar 1311, that is, the longitudinal reinforcing bar 212 may be coupled to the first loop-shaped reinforcing bar 211, the longitudinal reinforcing bar 212 may be further coupled to the first reinforcing bar 1311, the longitudinal bar 212 may be simultaneously coupled to the first ring-shaped bar 211 and the first bar 1311, and the longitudinal bar 212, the first ring-shaped bar 211 and the first bar 1311 may be coupled to each other by wire-tying.
In some embodiments of the present invention, referring to fig. 3, 4 and 6, the first connection subunit 21 includes a plurality of first annular reinforcing bars 211 and a plurality of longitudinal reinforcing bars 212, at least one first annular reinforcing bar 211 may be disposed in two first extension grooves 1211 opposite to each other in the first direction, and the first inter-plate joint includes a first connection region and a first core region, wherein the first core region is a region surrounded by the first reinforcing bars 1311 and the first annular reinforcing bars 211, the region of the first inter-plate joint except the first core region is the first connection region, and the plurality of longitudinal reinforcing bars 212 are fixedly connected to the first annular reinforcing bars 211 and the first reinforcing bars 1311 in the first core region 1311, so as to improve the force transmission performance between the first annular reinforcing bars 211 and the first reinforcing bars 1311 and enhance the shear resistance of the bridge deck assembly 10 at the first inter-plate joint. The plurality of longitudinal steel bars 212 are connected with the first annular steel bar 211 at the first connection region, and the plurality of longitudinal steel bars 212 of the first connection region can be distributed on the upper layer and the lower layer of the first annular steel bar 211 to improve the fixing and force transmission effects.
In some embodiments of the present invention, referring to fig. 4 and 6, the longitudinal rebars 212 at the first core area are the first shear rebars 2121, and the longitudinal rebars 212 at the first connection area are the first distribution rebars 2122.
In some embodiments of the present invention, the side wall of the first extension groove 1211 is an uneven rough surface, so as to increase the bonding strength of the connection between the post-cast concrete 3 and the first extension part 121, and improve the stress performance of the connection between the post-cast concrete 3 and the first extension part 121.
In some embodiments of the present invention, referring to fig. 7, the groove width of the first extension groove 1211 periodically varies in the first direction according to a plurality of different width values, so that the first extension groove 1211 forms a serrated concave-convex sidewall, thereby facilitating the manufacture of the first extension groove 1211, increasing the bonding strength at the connection of the post-cast concrete 3 and the first extension part 121, and improving the stress performance at the connection of the post-cast concrete 3 and the first extension part 121.
In some embodiments of the present invention, the width of the first extension groove 1211 at any position is greater than the diameter of the first annular reinforcing bar 211, so as to provide a certain movement space for the first annular reinforcing bar 211, and facilitate adjusting the position of the first annular reinforcing bar 211, so as to avoid the position collision between the first annular reinforcing bar 211 and the shear connector 201, and reduce the difficulty in assembling the first annular reinforcing bar 211. It can be understood that the groove width of the first extension groove 1211 is a size of the first extension groove 1211 in the second direction.
In some embodiments of the present invention, as shown with reference to fig. 2 and 3, the second extension branch 122 is provided with at least one second extension groove 1221, the extension direction of the second extension groove 1221 may be a second direction, the second extension grooves 1221 may be spaced apart in the first direction, a pitch of any two adjacent second extension grooves 1221 may be equal, the second extension branch 122 has a second upper surface and a second outer side surface, the second outer side surface may be a vertical side of the second extension branch 122 away from the panel portion 11, the second extension groove 1221 penetrates to the second outer side surface in the second direction, and the second extension groove 1221 extends to the second upper surface in the thickness direction of the second extension branch 122, that is, the second extension groove 1221 opens upward, the second extension groove 1221 also opens in the second direction to facilitate installation of the second connection sub unit 22 and further facilitate increasing a bonding area of the post-cast concrete 3 and the second extension branch 122, the effect of the combination of post-cast concrete 3 and the second extension subsection 122 is improved.
The depth of the second extension groove 1221 is smaller than the thickness of the second extension subsection 122, so that the second extension subsection 122 forms a plurality of connected second extension subsections 1222, and the bottoms of the plurality of connected second extension subsections 1222 are connected, so that when the post-cast concrete 3 is poured and filled in the second plate-to-plate joint, the bottom of the second extension subsection 122 can be prevented from leaking slurry without using a formwork, and rapid construction can be realized.
The second coupling subsection 132 includes a plurality of second reinforcing bars 1321, at least a portion of the second extension subsection 1222 is connected to the panel part 11 by the second reinforcing bars 1321 to ensure the coupling strength of the second extension subsection 1222 to the panel part 11, the plurality of second reinforcing bars 1321 may be spaced apart in the first direction, the second reinforcing bars 1321 are integrated with the inner reinforcing bars 14 of the prefabricated bridge deck unit 1, or the second reinforcing bars 1321 are connected to the inner reinforcing bars 14 of the prefabricated bridge deck unit 1, the inner reinforcing bars 14 are located inside the prefabricated bridge deck unit 1, and the inner reinforcing bars 14 may be a plurality of reinforcing bars staggered transversely and longitudinally.
In some embodiments of the invention, referring to fig. 5, the second extension subsection 122 is provided with at least one second extension distribution rib 1223 at the bottom of the second extension slot 1221, the second extension distribution rib 1223 may extend in the first direction, and the second extension distribution rib 1223 may be connected with the inner reinforcement bar 14 and/or the second reinforcement bar 1321 to improve the load-bearing capacity of the second extension subsection 122.
In some embodiments of the present invention, referring to fig. 2, 3 and 5, the second coupling sub-unit 22 includes a second annular reinforcing bar 221 extending in the second direction and a transverse reinforcing bar 222 extending in the first direction, the second annular reinforcing bar 221 may be a closed loop reinforcing bar having a shape of a rectangle, a circle, an ellipse, a polygon, etc., the second annular reinforcing bar 221 is disposed in two second extension grooves 1221 opposite to each other in the second direction, that is, both ends of the second annular reinforcing bar 221 may be disposed in two second extension grooves 1221 opposite to each other, the second extension grooves 1221 may provide a position for the second annular reinforcing bar 221 to facilitate the assembly of the second annular reinforcing bar 221, the transverse reinforcing bar 222 may be adapted to be coupled to the second annular reinforcing bar 221 and/or the second reinforcing bar 1321, that is, the transverse reinforcing bar 222 may be coupled to the second annular reinforcing bar 221, the transverse reinforcing bar 222 may be further coupled to the second reinforcing bar 1321, the transverse bar 222 can be simultaneously connected with the second annular bar 221 and the second bar 1321, and the transverse bar 222, the second annular bar 221 and the second bar 1321 can be connected through fire wire binding.
In some embodiments of the present invention, referring to fig. 2, 3 and 5, the second connecting subunit 22 includes a plurality of second annular reinforcing bars 221 and a plurality of transverse reinforcing bars 222, at least one second annular reinforcing bar 221 may be disposed in two second extending grooves 1221 opposite to each other in the second direction, and the second inter-plate joint includes a second connecting area and a second core area, wherein the second core area is an area surrounded by the second reinforcing bars 1321 and the second annular reinforcing bars 221, the area of the second inter-plate joint other than the second core area is the second connecting area, and the plurality of transverse reinforcing bars 222 are fixedly connected to the second annular reinforcing bars 221 and the second reinforcing bars 1321 in the second core area, so as to improve the force transfer performance between the second annular reinforcing bars 221 and the second reinforcing bars 1321 and enhance the shearing resistance of the deck assembly 10 at the second inter-plate joint. The plurality of transverse reinforcing bars 222 are connected with the second annular reinforcing bar 221 at a second connection area, and the plurality of transverse reinforcing bars 222 of the second connection area can be distributed on the upper layer and the lower layer of the second annular reinforcing bar 221 so as to improve the fixing and force transmission effects.
In some embodiments of the present invention, referring to fig. 5, the transverse bars 222 at the second core area are second shear bars 2221, and the transverse bars 222 at the second joint area are second distribution bars 2222.
In some embodiments of the present invention, the side wall of the second extension groove 1221 is an uneven rough surface, so as to increase the bonding strength of the joint between the post-cast concrete 3 and the second extension branch 122, and improve the stress performance of the joint between the post-cast concrete 3 and the second extension branch 122.
In some embodiments of the present invention, the width of the second extension groove 1221 is periodically changed according to a plurality of different width values in the second direction, so that the second extension groove 1221 forms a serrated concave-convex sidewall, thereby facilitating the manufacture of the second extension groove 1221, increasing the bonding strength of the connection between the post-cast concrete 3 and the second extension branch 122, and improving the stress performance of the connection between the post-cast concrete 3 and the second extension branch 122.
In some embodiments of the present invention, the width of the second extension groove 1221 at any position is larger than the diameter of the second loop-shaped reinforcement bar 221, so as to provide a certain movement space for the second loop-shaped reinforcement bar 221, and facilitate adjusting the position of the second loop-shaped reinforcement bar 221, so as to reduce the difficulty of assembling the second loop-shaped reinforcement bar 221. It is understood that the groove width of the second extension groove 1221 is the size of the second extension groove 1221 in the first direction.
It should be noted that according to the bridge deck assembly 10 of the embodiment of the present invention, the extension 12 of the prefabricated bridge deck units 1 may only include the first extension section 121 to form a longitudinal first inter-slab joint between a plurality of prefabricated bridge deck units 1, where two adjacent prefabricated bridge deck units 1 are connected by the first connecting sub-unit 21 and the post-cast concrete 3.
Of course, the extension 12 of a prefabricated bridge deck unit 1 may also comprise only a second extension subsection 122 to form a transverse second inter-slab joint between a plurality of prefabricated bridge deck units 1, where two adjacent prefabricated bridge deck units 1 are connected by a second connecting subsection 22 and the post-cast concrete 3.
Furthermore, the extension 12 of the prefabricated bridge deck units 1 may also include a first extension part 121 and a second extension part 122 at the same time, so as to form a first plate joint and a second plate joint which are crosswise between a plurality of prefabricated bridge deck units 1, and two adjacent prefabricated bridge deck units 1 are connected at the first plate joint and the second plate joint through a first connecting sub-unit 21, a second connecting sub-unit 22 and a post-cast concrete 3.
Referring to fig. 1 to 8, a fabricated composite bridge 100 according to another embodiment of the present invention includes: the steel girder 20 and the decking assembly 10 of the above embodiment, the prefabricated decking units 1 are at least partially overlapped with the steel girder 20.
Wherein, the steel girder 20 can extend along the second direction, at least a part of the prefabricated bridge deck units 1 oppositely arranged in the first direction can be lapped on the left and right ends of the top surface of the steel girder 20, for example, at least a part of the first extension sub-portions 121 of the prefabricated bridge deck units 1 oppositely arranged in the first direction can be lapped on the left and right ends of the top surface of the steel girder 20, and meanwhile, the top surface of the steel girder 20 can be provided with shear connectors 201, and the shear connectors 201 can improve the shear resistance of the fabricated composite bridge 100. The connecting unit 2 and the shear connector 201 are arranged in a staggered manner, so that interference between the connecting unit and the shear connector 201 is avoided, and assembly is not affected.
According to the fabricated composite bridge 100 provided by the embodiment of the invention, the prefabricated bridge deck units 1 are at least partially lapped on the steel main beam 20, the corresponding connecting parts 13 on the two prefabricated bridge deck units 1 with the opposite extending parts 12 are indirectly connected through the connecting units 2, and the joints between the plates are filled with the post-cast concrete 3, so that the connecting units 2 are simple to assemble and convenient to adjust and assemble, the construction difficulty of the fabricated composite bridge 100 is favorably reduced, and the construction speed of the fabricated composite bridge 100 is increased.
According to another aspect of the present invention, a construction method of a fabricated composite bridge is provided for the fabricated composite bridge 100 of the above embodiment, and as shown in fig. 9, the construction method includes the following steps:
step S1, making a prefabricated bridge deck unit: the prefabricated bridge deck unit 1 is made of reinforced concrete, wherein the prefabricated bridge deck unit 1 is a prefabricated slab different from a cast-in-place slab, so that the prefabricated bridge deck unit 1 which is already formed is directly used in construction, thereby facilitating the improvement of construction speed.
Step S2, erecting a prefabricated bridge deck unit: the prefabricated bridge deck units 1 are erected on a steel main beam 20, at least one part of the extension parts 12 of the prefabricated bridge deck units 1 can be lapped on the top surface of the steel main beam 20, and at least part of the extension parts 12 of two adjacent prefabricated bridge deck units 1 are arranged oppositely. Preferably, the two extensions 12 are aligned with each other at the portions where they are oppositely disposed, the first extension groove 1211 or the second extension groove 1221, so as to facilitate the assembly of the first and second loop reinforcements 211 and 221.
It should be noted that, because the connecting portion 13 on the prefabricated bridge deck unit 1 does not extend out toward the prefabricated bridge deck unit 1 on the opposite side, in the construction process of erecting the prefabricated bridge deck unit 1 on the steel main beam 20, the connecting portion 13 does not collide with the structure (for example, the shear connector 201) between two prefabricated bridge deck units 1, thereby being beneficial to reducing the construction difficulty of assembling the bridge deck assembly 10.
Step S3, mounting a connection unit: the corresponding connecting portions 13 of the two opposite extending portions 12 are connected by the connecting unit 2.
It should be noted that the connecting portions 13 on the two opposite prefabricated bridge deck units 1 are indirectly connected through the connecting units 2, the connecting units 2 are simple to assemble, and are convenient to adjust and assemble, and the problems of position conflict and the like caused by the direct connection of the connecting portions 13 on the opposite prefabricated bridge deck units 1 can be avoided, so that the construction difficulty of the fabricated composite bridge 100 during assembly is further reduced.
Step S4, pouring seams between plates: the joints between the plates are compacted by concrete to form wet joints.
According to the construction method of the fabricated composite bridge 100 provided by the embodiment of the invention, the problem of steel bar conflict at the joint when the prefabricated bridge deck units 1 are assembled is solved while joint connection strength is ensured, and the assembly construction difficulty of the fabricated composite bridge 100 is low, so that the construction speed of the fabricated composite bridge 100 is favorably increased, and the rapid construction of the fabricated composite bridge 100 can be realized.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A decking assembly, comprising:
the prefabricated bridge deck units comprise deck plates, extension parts and connecting parts, the extension parts are connected to the sides of the deck plates, the thickness of each extension part is smaller than that of each deck plate, the upper ends of the extension parts are connected with the deck plates through the connecting parts, the extension parts of two adjacent prefabricated bridge deck units are at least partially arranged oppositely, and an inter-deck seam is formed between the prefabricated bridge deck units;
the connecting unit is used for connecting the connecting parts corresponding to the two opposite extending parts;
and post-cast concrete filled in the joints among the plates.
2. The deck slab assembly as defined in claim 1, wherein said inter-panel seam comprises a first inter-panel seam;
the deck panel assembly having a first direction, the extension comprising a first extension section extending in the first direction, the connection comprising a first connection section by which an upper end of the first extension section is connected to the panel section, the first extension sections of two adjacent prefabricated deck panel units being oppositely disposed and spaced apart in the first direction to form the first inter-panel joint;
the connecting unit comprises a first connecting sub-unit, the first connecting sub-unit is arranged at the seam between the first plates and is used for connecting the first connecting sub-units corresponding to the two first extending sub-units opposite to each other in the first direction;
and the post-cast concrete is filled in the joints between the first plates.
3. A bridge deck assembly as claimed in claim 1 or 2, wherein the inter-panel seams comprise a second inter-panel seam;
the bridge deck slab assembly having a second direction, the extension comprising a second extension section extending in the second direction, the connection comprising a second connection section by which an upper end of the second extension section is connected with the deck section, the second extension sections of two adjacent prefabricated deck slab units abutting in the second direction to form the second inter-slab joint;
the connecting unit comprises a second connecting sub-unit which is used for connecting the second connecting sub-units corresponding to the two second extending sub-units opposite to each other in the second direction;
and the post-cast concrete is filled in the joint between the second plates.
4. The deck assembly as recited in claim 2, wherein said first extension section is provided with at least one first extension slot, said first extension section having a first upper surface and a first outer side surface, said first extension slot extending through to said first outer side surface in said first direction, and said first extension slot extending along a thickness direction of said first extension section to said first upper surface, said first extension slot having a slot depth less than a thickness of said first extension section such that said first extension section forms a plurality of connected first extension subsections, said first connection section including a plurality of first reinforcing bars, at least a portion of an upper end of said first extension subsection being connected to said deck section by said first reinforcing bars.
5. A deck panel assembly according to claim 4, wherein the first connecting sub-unit comprises first annular reinforcing bars extending in the first direction and longitudinal reinforcing bars extending in the second direction, the first annular reinforcing bars being provided in two first extending grooves opposite in the first direction, the longitudinal reinforcing bars being adapted to connect with the first annular reinforcing bars and/or the first reinforcing bars.
6. The bridge deck assembly of claim 4, wherein the side walls of the first extension groove are rugged rough surfaces.
7. A bridge deck assembly according to claim 3, wherein the second extension section is provided with at least one second extension slot having a second upper surface and a second outer surface, the second extension slot extending through to the second outer surface in the second direction and extending in the thickness direction of the second extension section to the second upper surface, the second extension slot having a slot depth less than the thickness of the second extension section such that the second extension section forms a plurality of connected second extension sub-sections, the second connection section comprising a plurality of second reinforcing bars, at least part of the upper end of the second extension sub-section being connected to the deck section by the second reinforcing bars.
8. The deck panel assembly of claim 7, wherein the second coupling sub-unit comprises a second annular reinforcing bar extending in the second direction and a transverse reinforcing bar extending in the first direction, the second annular reinforcing bar being provided in two second extending grooves opposite in the second direction, the transverse reinforcing bar being adapted to couple with the second annular reinforcing bar and/or the second reinforcing bar.
9. The deck panel assembly of claim 7, wherein the side walls of the second extension grooves are rugged rough surfaces.
10. An assembled composite bridge, comprising:
a steel main beam;
a deck plate assembly being a deck plate assembly according to any one of claims 1 to 9, the prefabricated deck plate units being at least partially lapped to the steel main beam.
11. A construction method of a fabricated composite bridge, which is applied to the fabricated composite bridge of claim 10, comprising the steps of:
manufacturing the prefabricated bridge deck unit: manufacturing the prefabricated bridge deck unit by using reinforced concrete;
erecting the prefabricated bridge deck unit: erecting the prefabricated bridge deck units on the steel main beams;
installing the connecting unit: connecting the connecting parts corresponding to the two opposite extending parts through the connecting unit;
pouring the joints between the plates: and (5) pouring concrete to compact the joints among the plates.
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