CN114775423A - Concrete composite slab unit, concrete composite slab assembly, concrete composite slab bridge body and splicing construction method - Google Patents
Concrete composite slab unit, concrete composite slab assembly, concrete composite slab bridge body and splicing construction method Download PDFInfo
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- CN114775423A CN114775423A CN202210302667.1A CN202210302667A CN114775423A CN 114775423 A CN114775423 A CN 114775423A CN 202210302667 A CN202210302667 A CN 202210302667A CN 114775423 A CN114775423 A CN 114775423A
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- 239000004567 concrete Substances 0.000 title claims abstract description 178
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000002131 composite material Substances 0.000 title claims description 79
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 58
- 239000010959 steel Substances 0.000 claims abstract description 58
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 claims description 19
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 10
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 9
- 238000005304 joining Methods 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 21
- 230000003014 reinforcing effect Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 230000002787 reinforcement Effects 0.000 description 8
- 238000003860 storage Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007723 transport mechanism Effects 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
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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
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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
A concrete combined slab unit, an assembly, a bridge body and a splicing construction method are disclosed, wherein the concrete combined slab unit comprises a concrete slab, the concrete slab is formed on a metal bottom plate, a first group of steel bars are pre-embedded in the concrete slab, a splicing notch is formed in the splicing end of the concrete slab, and the splicing notch is arranged to be spliced with a concrete joint section; the first shear connector is arranged on the metal bottom plate and connected with the metal bottom plate, the first shear connector is pre-embedded in the concrete slab and partially extends out of the splicing end, and the first shear connector is arranged to support at least part of the second set of steel bars pre-embedded in the concrete joint section.
Description
Technical Field
The present invention relates to a concrete combined slab technology, in particular, it relates to a concrete combined slab unit, component, bridge body and splicing method.
Background
The concrete composite board has wide application in the bridge deck structure, but the arrangement of the joint reinforcing steel bars of the existing concrete bridge deck is more complicated, and the difficulty in manufacturing the mould is large. In addition, the reinforcing bars in the joint area need to be connected by welding, mechanical connection or the like, which is inconvenient for construction.
In the application of the light-weight and high-strength bridge deck slab structure, the joint structure of a steel-ultra-high performance concrete (UHPC) composite slab is reported at present. For example, the steel-Ultra High Performance Concrete (UHPC) composite slab has a smaller thickness and a lighter weight in a girder than a conventional concrete deck slab, and the economic span can be further increased by using the UHPC composite slab as a deck slab of a steel-concrete composite structural bridge.
The ultra-high performance concrete (UHPC) is a novel cement-based composite material designed based on the principle of maximum compactness, contains a certain volume fraction of steel fiber, and has ultra-high compressive strength and higher axial tensile strength. The steel bottom plate and the ultra-high performance concrete (UHPC) are combined through shear connectors such as perforated Plate (PBL) shear keys, so that the steel-ultra-high performance concrete (UHPC) composite plate with high strength, high rigidity, good crack resistance and convenient construction can be obtained, and the performance requirements of a large-span composite bridge are well met. In addition, due to the fact that the composite slab is easy to assemble and construct, light, thin and high in strength, the composite slab has a certain application prospect in large-span building floors, and the problems that the arrangement is complex and the like still exist.
Disclosure of Invention
The application provides a concrete composite board unit, assembly, bridge body and splicing construction method, overall structure is simple, splicing construction is simple, and transportation and transport are all more convenient.
The application provides concrete compoboard unit includes: a metal base plate; the concrete slab is formed on the metal base plate, a first group of steel bars are pre-embedded in the concrete slab, a splicing notch is formed in the splicing end of the concrete slab, and the splicing notch is arranged to be spliced with the concrete joint section; the first shear connector is arranged on the metal bottom plate and connected with the metal bottom plate, the first shear connector is pre-embedded in the concrete slab and partially extends out of the splicing end, and the first shear connector is arranged to support at least part of the second set of steel bars embedded in the concrete splicing section.
In one exemplary embodiment, the splice rebates comprise a plurality and are spaced apart in a splicing direction perpendicular to the splice end of the concrete slab; the splicing notches are rectangular.
In one exemplary embodiment, the first shear connector comprises a plurality of shear connectors spaced apart in a direction perpendicular to the splice end of the slab; the part of the first shear connector extending out of the splicing end is provided with a first opening, and the first opening is arranged to allow at least part of the steel bars in the second group of steel bars to pass through.
In an exemplary embodiment, the base plate has a splicing edge, the splicing edge extending beyond a portion of the first shear connector extending beyond the splicing end in a splicing direction of the splicing end of the concrete slab.
In one exemplary embodiment, the concrete slab is a steel-ultra high performance concrete slab and the bottom slab is a steel slab.
The application provides a concrete composite board subassembly includes: a plurality of concrete composite slab units as described in any of the embodiments that are spliced together, and concrete joint sections that splice adjacent concrete composite slab units into one body; the splicing end of the concrete joint section is provided with a convex part spliced with the splicing notch; and a second group of steel bars are embedded in the concrete joint section in advance, and at least part of steel bars in the second group of steel bars are supported on the part of the first shear connector extending out of the splicing end.
In one exemplary embodiment, the second set of rebar comprises a first rebar set extending in a direction perpendicular to the splicing direction of the spliced end of the concrete slab and a second rebar set extending in the splicing direction of the spliced end of the concrete slab; the first steel bar group is supported on the part of the first shear connector extending out of the splicing end; the second steel bar group and the first steel bar group are arranged in a staggered mode, and two ends of the second steel bar group and two ends of the first steel bar group stretch into the splicing notches corresponding to the adjacent concrete combined plate units respectively.
In an exemplary embodiment, both ends of the second reinforcement bar group are respectively inserted into a splicing notch, and the inner side wall of the splicing notch is roughened in advance.
In an exemplary embodiment, the second set of rebars is rectangular in configuration and is fixedly tied to the first set of rebars.
In an exemplary embodiment, the second rebar set comprises a plurality of sets spaced apart in a direction perpendicular to the splice end of the concrete slab.
In an exemplary embodiment, the splicing edges of the bottom plates of adjacent concrete composite slab units are integrally connected by welding.
In an exemplary embodiment, the concrete composite slab assembly further comprises a second shear connector, the second shear connector is connected with the first shear connector corresponding to the adjacent concrete composite slab unit, and the joints at two ends of the second shear connector connected with the first shear connector adjacent to the concrete composite slab unit are respectively staggered with the splicing joints formed by welding the bottom plates.
In an exemplary embodiment, the second shear connector is further provided with a second opening through which a portion of the rebars of the first set of rebars pass.
The application provides a bridge includes: the concrete composite slab comprises a bridge main body and the concrete composite slab assembly laid on the bridge main body according to any embodiment.
The application provides a splicing construction method of concrete combined slab units, which can be applied to any of the above embodiments, and the method comprises the following steps: connecting the bottom plates of the adjacent concrete combined slab units into a whole, and connecting the first shear connectors corresponding to the adjacent concrete combined slab units; arranging a first steel bar group of a second group of steel bars at the part of the first shear connector extending out of the splicing end of the concrete slab of the concrete combined slab unit, and respectively extending two ends of the second steel bar group into the splicing notches corresponding to the adjacent concrete combined slab units; connecting the first steel bar group with the second steel bar group; and pouring concrete to cover the second group of steel bars and form concrete joint sections, and splicing the concrete joint sections with the adjacent concrete composite slab units respectively.
In one exemplary embodiment, connecting the first shear connectors corresponding to adjacent concrete composite slab units comprises: and connecting the first shear connectors corresponding to the adjacent concrete combined slab units through the second shear connector.
Compared with the prior art, the concrete composite board unit of the embodiment of the application supports the second group of reinforcing steel bars embedded in the concrete joint section in advance by arranging the first shear connector to extend out of the splicing end part, and the support is stable.
In addition, the splicing end does not need to extend out the first group of steel bars of the concrete slab, so that the concrete combined slab unit is simple in integral structure, simple in splicing construction and convenient to transport and carry.
In an exemplary embodiment, the inside first reinforcing bar of the tip of this application two treat the joint plate unit adopts non-contact biography power to be connected with the second reinforcing bar group of seam section, has saved processes such as steel-bar welding or mechanical connection, is favorable to quick construction.
In an exemplary embodiment, the second shear connector is adopted to connect the aligned first shear connector, so that the butt weld of the welding seam and the base plate is prevented from being concentrated on the same section, and the welding seam can be effectively prevented from being damaged.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present application. Other advantages of the present application can be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
FIG. 1 is a first splicing state diagram of a concrete composite slab unit according to an embodiment of the present application;
FIG. 2 is a second diagram illustrating a concrete composite slab unit according to an embodiment of the present invention;
FIG. 3 is a third illustration showing a state of jointing concrete composite slab units according to the embodiment of the present invention;
FIG. 4 is a fourth illustration showing the concrete composite slab unit according to the embodiment of the present invention in a splicing state;
FIG. 5 is a graph of load-deflection curves after the concrete composite slab units of the embodiment of the present application are spliced;
fig. 6 is a graph of nominal stress versus maximum crack width after the concrete composite slab unit of the embodiment of the present application is spliced.
Detailed Description
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed herein may also be combined with any conventional features or elements to form unique inventive aspects as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
As shown in fig. 1, the present embodiment provides a concrete composite slab unit 1a, 1b including: metal chassis 10a, 10 b; concrete slabs 11a, 11b formed on the metal bottom plates 10a, 10b, a first set of steel bars (not shown) embedded inside the concrete slabs 11a, 11b, splicing ends 110a, 110b of the concrete slabs 11a, 11b are provided with splicing notches 1101a, 1101b, and the splicing notches 1101a, 1101b are arranged to be spliced with the concrete splicing sections 2 (see fig. 4); first shear connectors 12a, 12b provided on the metal base plates 10a, 10b and connected to the metal base plates 10a, 10b, the first shear connectors 12a, 12b being pre-embedded in the concrete slabs 11a, 11b and partially protruding out of the splicing ends 110a, 110b, the first shear connectors 12a, 12b being arranged to support at least part of the second set of reinforcement bars 21 (see fig. 3) pre-embedded in the concrete joint section 2 (see fig. 4).
In this embodiment, the metal bottom plates 10a and 10b and the first shear connectors 12a and 12b are made of steel, and in other embodiments, other plates may be used, which is not limited herein.
In this embodiment, the concrete slab is a steel-Ultra High Performance Concrete (UHPC) composite slab, and has ultra high compressive strength and high axial tensile strength.
In this embodiment, the splicing notches 1101a and 1101b are rectangular, which facilitates the demolding.
When 1 concatenation notch 1101a of concrete composite board unit, 1101b and the concatenation of concrete joint section 2 of this application embodiment, the preparation of board end mould is very simple, and the drawing of patterns is convenient. The concrete combined plate units 1a and 1b are partially supported by the first shear connectors 12a and 12b extending out of the splicing ends 110a and 110b to support a second group of steel bars 21 (see fig. 3) embedded in the concrete joint section 2 (see fig. 4) in advance, the first shear connectors 12a and 12b extending out of the splicing ends 110a and 110b partially support steel bars of the joint section which can be poured later, the supporting structure is stable, and the splicing ends 110a and 110b do not need to extend out of the first group of steel bars of the concrete slabs 11a and 11b, so that the concrete combined plate unit 1 is simple in integral structure, simple in splicing construction, and convenient to transport and carry.
As shown in fig. 1, the splice notches 1101a, 1101b include a plurality and are arranged at intervals along a splicing direction perpendicular to the splicing end of the concrete plates 11a, 11 b. The first shear connection members 12a, 12b include a plurality of members and are spaced apart in a splicing direction (a direction indicated by an arrow in fig. 1) perpendicular to the splicing ends 110a, 110b of the concrete slabs 11a, 11 b. The arrangement of the splice slots 1101a, 1101b and the plurality of arrangements of the first shear connectors 12a, 12b makes the splice forces more uniform.
The portion of the first shear connector 12a, 12b extending beyond the splice ends 110a, 110b is provided with a first opening 120a, 120b, the first opening 120a, 120b being configured to receive at least a portion of the second set of reinforcement bars 21 (see fig. 3).
The base plates 101a, 101b have joint edges 101a, 101b, which extend beyond the portions of the first shear connector 12a, 12b that extend beyond the joint ends 110a, 110b in the joint direction of the joint ends of the concrete slabs 11a, 11b (the direction indicated by the arrows in fig. 1), so that the weld seams of the joint edges 101a, 101b of the welded base plates 10a, 10b and the weld seams of the first shear connector 12a, 12b and the second shear connector 3 are prevented from being concentrated on the same cross section, and the weld seams can be effectively prevented from being broken.
As shown in fig. 1 and 4, the present application further provides a concrete composite slab assembly, including: a plurality of concrete combined slab units 1a and 1b which are spliced together and described in any of the above embodiments, and a concrete joint section 2 which integrally splices the adjacent concrete combined slab units 1a and 1 b.
As shown in fig. 4, the splice ends 2a, 2b of the concrete joint section 2 are provided with protrusions 20a, 20b that splice with the splice slots 1101a, 1101 b.
As shown in fig. 3, the concrete joint section 2 is embedded with a second set of reinforcing bars 21, and at least some of the reinforcing bars 21 of the second set of reinforcing bars 21 are supported by the portions of the first shear connectors 12a, 12b extending beyond the spliced ends 110a, 110 b.
The second set of rebars 21 comprises a first set of rebars 211 extending in a direction perpendicular to the direction of splicing of the spliced ends of the concrete slabs 11a, 11b and a second set of rebars 212 extending in the direction of splicing of the spliced ends of the concrete slabs 11a, 11 b. The first and second rebar sets 211 and 212 each include a plurality of rebars.
The first set of rebars 211 is supported by the portion of the first shear connector 12a, 12b that extends beyond the splice ends 110a, 110 b. The second steel bar group 212 and the first steel bar group 211 are arranged in a staggered mode, and two ends of the second steel bar group extend into the splicing notches 1101a and 1101b corresponding to the adjacent concrete composite slab units 1 respectively.
Certain intervals, such as about 20 mm's distance, can be reserved with the inside wall of concatenation notch 1101a, 1101b in the both ends of second reinforcing bar group 212 for the pouring of concrete joint section, avoid crowding the area that occupies new and old concrete connection. The inner side walls of the splice notches 1101a, 1101b are pre-roughened to better mate with the seam section 2. In this embodiment, the second steel bar group 212 is arranged in a rectangular shape, and is fixedly connected with the first steel bar group 211 in a binding manner, so that fixation and force transmission are realized. The second rebar set 212 comprises a plurality of sets spaced apart along the direction of splicing of the spliced ends of the vertical concrete slab.
The utility model provides a two treat that to connect concrete composite slab unit 1a, 1 b's tip reinforcing bar (pre-buried at the inside first group reinforcing bar of concrete slab) and the second reinforcing bar group 212 of the seam region (concrete joint section 2) of back pouring adopt non-contact biography power to be connected, have saved processes such as welded steel or mechanical connection, are favorable to quick construction.
As shown in fig. 2, the joint edges 101a and 102b of the bottom plates 10a and 10b of the adjacent concrete composite slab units 1a and 1b are integrally connected by welding.
As shown in fig. 2, the concrete composite slab assembly further comprises a second shear connector 3, and the second shear connector 3 connects the first shear connectors 12a, 12b corresponding to the adjacent concrete composite slab units 1a, 1 b. The joints at the two ends of the second shear connector 3 connected with the first shear connectors 12a and 12b of the adjacent concrete composite slab units 1a and 1b are respectively staggered with the splicing joints formed by welding the base plates 10a and 10b, so that the welding seams of the splicing edges 101a and 101b of the welding seam base plates 10a and 10b and the welding seams of the first shear connectors 12a and 12b and the second shear connector 3 are prevented from concentrating on the same cross section, and the welding seams can be effectively prevented from being damaged. The second shear connector 3 is also provided with a second opening 30 through which part of the reinforcing bars in the first set 211 of reinforcing bars pass.
The first and second shear connectors 12a, 12b, 3 may be formed as apertured plate shear keys or studs and welded to the base plates 10a, 10b as a unitary body. When the shear connector is a perforated plate shear key, the perforated plate shear key aligned with the end of the combined plate unit 1a to be connected and the end of the combined plate unit 1b to be connected is connected by butt welding with the second shear connector 3.
As shown in fig. 5, with the joining method of the present application, the concrete composite slab assembly was subjected to the following tests: the nominal cracking stress corresponding to the 0.05mm crack width reaches 7.8Mpa, which indicates that the concrete composite board assembly has good crack resistance after the connecting method is adopted.
As shown in fig. 6, with the joining method of the present application, the concrete composite slab assembly was tested: the load bearing capacity of deflection close to 150mm is still not obviously reduced, which shows that the ductility of the concrete composite board assembly is high after the connecting method of the application is adopted.
The embodiment of the present application further provides a bridge (not shown), including: bridge main part and lay the concrete compoboard subassembly described in arbitrary embodiment on bridge main part. The structure of the concrete composite board assembly can refer to any of the above embodiments, and the details are not repeated herein.
This application sets up one row of rectangle notch 1101a, 1101b at concrete composite slab unit 1a, 1 b's tip, and the preparation of board end mould is very simple, and the drawing of patterns is convenient.
According to the connection method and the connection device, the aligned first shear connection pieces 12a and 12b are connected by adopting the second shear connection piece 3, the butt weld joints of the weld joints and the bottom plates 10a and 10b are prevented from being concentrated on the same cross section, and the weld joints can be effectively prevented from being damaged.
The end reinforcing steel bars of the two combined plate units 1a and 1b to be connected and the second reinforcing steel bar group 212 of the joint section 2 extend into the splicing notches 1101a and 1101b through two ends, so that non-contact force transmission connection is realized, processes such as reinforcing steel bar welding or mechanical connection are omitted, and rapid construction is facilitated.
The embodiment of the application also provides a splicing construction method of the concrete combined slab unit, which comprises the following operations:
s1: connecting the bottom plates 10a and 10b of the adjacent concrete combined plate units 1a and 1b into a whole, and connecting the corresponding first shear connectors 12a and 12b of the adjacent concrete combined plate units 1a and 1 b;
s2: arranging a first reinforcement bar group 211 of a second reinforcement bar group 21 at the part of the first shear connectors 12a and 12b extending out of the splicing ends 110a and 110b, and respectively extending two ends of the second reinforcement bar group 21 into the splicing notches 1101a and 1101b corresponding to the adjacent concrete combined slab units 1a and 1 b;
s3: connecting the first rebar set 211 with the second rebar set 212;
s4: and pouring concrete to cover the second group of reinforcing steel bars 21 and form concrete joint sections 2 to respectively connect the adjacent concrete combined slab units 1a and 1 b.
The structures of the concrete combination slab units 1a and 1b, the structures of the first reinforcement group 211 and the second reinforcement group 212, the structure of the concrete joint section 2, and the like may be any of the above embodiments, and are not described herein again.
Wherein the connecting the first shear connectors 12a, 12b corresponding to the adjacent concrete composite slab units 1a, 1b in operation S1 includes: the first shear connection members 12a, 12b corresponding to the adjacent concrete composite slab units 1a, 1b are connected by the second shear connection member 3.
Specifically, a row of rectangular splicing notches 1101a and 1101b are arranged at the splicing ends 110a and 110b of the concrete composite slab units 1a and 1 b; the splice ends 110a, 110b of the concrete composite panel unit to be joined 1a and the concrete composite panel unit to be joined 1b are placed at a predetermined position and aligned. The butt welding of the bottom plates 10a, 10b is completed. Welding the aligned first shear connector 12a and first shear connector 12b to the second shear connector 3. The vertical surfaces of the rectangular notches 1101a, 1101b are gouged to expose a large number of steel fibers. An annular second rebar set 212 is placed in each rectangular notch 1101a, 1101 b. The first set of rebars 211 is placed in a predetermined position and tied and fixed. And pouring the concrete post-pouring belt to form a joint section 2, and finishing maintenance.
The splicing construction method of the concrete composite board units has the advantages that the construction operation is simple, the structure is firm, the stress is uniform, the end reinforcing steel bars of the two composite board units 1a and 1b to be connected and the second reinforcing steel bar group 212 of the joint section 2 are connected in a non-contact force transferring mode, the mechanical property of the two composite boards after splicing is good, the processes of reinforcing steel bar welding or mechanical connection and the like are omitted, and the quick construction is facilitated.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, or suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (16)
1. A concrete composite slab unit, comprising:
a metal base plate;
the concrete slab is formed on the metal base plate, a first group of steel bars are pre-embedded in the concrete slab, a splicing notch is formed in the splicing end of the concrete slab, and the splicing notch is arranged to be spliced with the concrete joint section;
the first shear connector is arranged on the metal bottom plate and connected with the metal bottom plate, the first shear connector is pre-embedded in the concrete slab and partially extends out of the splicing end, and the first shear connector is arranged to support at least part of the second set of steel bars embedded in the concrete splicing section.
2. The concrete composite slab unit according to claim 1, wherein: the splicing notches comprise a plurality of splicing notches which are arranged at intervals along the splicing direction vertical to the splicing ends of the concrete slabs; the splicing notches are rectangular.
3. The concrete composite slab unit according to claim 1, wherein: the first shear connecting pieces comprise a plurality of first shear connecting pieces and are arranged at intervals along the splicing direction vertical to the splicing ends of the concrete slabs; the part of the first shear connector extending out of the splicing end is provided with a first opening, and the first opening is arranged for at least part of the second set of steel bars to pass through.
4. The concrete composite slab unit according to claim 1, wherein: the bottom plate is provided with a splicing edge, and the splicing edge exceeds the part of the first shear connecting piece extending out of the splicing end along the splicing direction of the splicing end of the concrete slab.
5. A concrete composite board unit according to any one of claims 1-4, wherein: the concrete slab is a steel-ultrahigh performance concrete slab, and the bottom plate is a steel plate.
6. A concrete composite panel assembly, comprising: a plurality of concrete composite slab units as claimed in any one of claims 1 to 5, joined together, and concrete joint sections joining adjacent said concrete composite slab units together;
the splicing end of the concrete joint section is provided with a convex part spliced with the splicing notch;
and a second group of steel bars are embedded in the concrete joint section in advance, and at least part of steel bars in the second group of steel bars are supported on the part of the first shear connector extending out of the splicing end.
7. The concrete composite panel assembly of claim 6, wherein: the second set of rebar comprises a first rebar set extending in a direction perpendicular to the direction of splicing of the spliced end of the concrete slab and a second rebar set extending in the direction of splicing of the spliced end of the concrete slab;
the first steel bar group is supported on the part of the first shear connector extending out of the splicing end;
the second steel bar group and the first steel bar group are arranged in a staggered mode, and two ends of the second steel bar group extend into the splicing notches corresponding to the concrete combined slab units and are adjacent to each other.
8. The concrete composite slab assembly of claim 7, wherein: and two ends of the second steel bar group respectively extend into the splicing notches, and the inner side walls of the splicing notches are subjected to roughening treatment in advance.
9. The concrete composite slab assembly of claim 7, wherein: and the second steel bar group is arranged in a rectangular shape and is bound and fixed with the first steel bar group.
10. The concrete composite panel assembly of claim 7, wherein: the second steel bar group comprises a plurality of groups which are arranged at intervals along the splicing direction vertical to the splicing end of the concrete slab.
11. The concrete composite slab assembly of claim 7, wherein: and the splicing edges of the bottom plates of the adjacent concrete combined plate units are connected into a whole in a welding mode.
12. The concrete composite slab assembly of claim 11, wherein: the concrete composite board assembly further comprises a second shear connector, the second shear connector is connected and adjacent to the first shear connector corresponding to the concrete composite board unit, and the joints at two ends, connected by the first shear connector of the concrete composite board unit, of the second shear connector are staggered respectively to form splicing joints formed by welding the bottom plates.
13. The concrete composite panel assembly of claim 12, wherein: the second shear connector is also provided with a second opening through which part of the steel bars in the first steel bar group pass.
14. A bridge, comprising: a bridge girder and a concrete composite slab assembly according to any one of claims 6 to 13 laid on the bridge girder.
15. A splicing construction method of a concrete combined plate unit is characterized by comprising the following steps:
connecting the bottom plates of the adjacent concrete combined slab units into a whole, and connecting the first shear connectors corresponding to the adjacent concrete combined slab units;
arranging a first steel bar group of a second group of steel bars at the part of the first shear connector extending out of the splicing end of the concrete slab of the concrete combined slab unit, and respectively extending two ends of the second steel bar group into the corresponding splicing notches of the adjacent concrete combined slab units;
connecting the first steel bar group with the second steel bar group;
and pouring concrete to cover the second group of reinforcing steel bars and form concrete joint sections, and splicing the concrete joint sections with the adjacent concrete combined slab units respectively.
16. The splicing construction method according to claim 15, wherein the connecting the first shear connectors corresponding to the adjacent concrete composite slab units comprises: and connecting the first shear connectors corresponding to the adjacent concrete combined plate units through second shear connectors.
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