Quick connecting piece suitable for full-assembly type composite beam

Abstract

The utility model discloses a quick connecting piece suitable for a fully-assembled composite beam. The quick connecting piece comprises a corrugated steel web, two embedded plates and a bolt connecting piece, flange plates are fixedly arranged at the two ends of the corrugated steel web. The pre-buried plate comprises a pre-buried part and connecting parts which are fixedly connected with each other, the pre-buried part is partially pre-buried in a top plate or a bottom plate of the composite beam, the two connecting parts are connected with the flange plates respectively, a plurality of long round holes are symmetrically formed in the connecting parts and the flange plates, and the long round holes are communicated with the long round holes. And the connecting parts are connected with the corresponding oblong holes in the flange plate through the bolt connecting pieces. The flange plates at the two ends of the corrugated steel web can be rapidly connected with the top plate and the bottom plate of the composite beam, the top plate can be rapidly replaced, construction is convenient, and the construction efficiency of the composite beam can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, and more specifically, to a quick connector suitable for a fully assembled composite beam. Background Art

[0002] Compared with reinforced concrete beams, composite beams with corrugated steel webs have the advantages of light weight, high prestressing efficiency, and good seismic performance, and are widely used in highways and municipal bridges. At present, corrugated steel webs are mainly prefabricated in the factory and transported to the site. After the webs are installed, the top and bottom plates are cast in place. It is necessary to tie steel bars on site, install and dismantle formwork, and pour concrete. Only after the top and bottom plates are strengthened can the next section be constructed. There are problems such as large on-site labor consumption, low work efficiency, difficulty in quality control, and high risks of high-altitude operations.

[0003] In order to improve the prefabrication and assembly level of composite beams with corrugated steel webs and reduce the difficulty of on-site operations and the pressure of construction period and labor costs, some bridges have begun to adopt partial prefabrication + on-site post-casting connection technology. At present, the prefabricated part is mainly steel corrugated steel webs and bottom plates. The top plate mainly adopts the on-site binding and post-casting process, and the steel web and the top plate are connected by bolt grouting. For example, the Chinese patent with application number 202110591830.6 discloses a first simply supported and then continuous corrugated web steel box-concrete composite beam, which consists of a reinforced concrete top plate, a corrugated steel web, a steel support plate, a steel bottom plate and a K-shaped steel crossbeam; the steel bottom plate is a flat steel plate, the steel bottom plate and the corrugated steel web are welded by butt welds, the steel support plate and the corrugated steel web are welded by butt welds, and bolts are arranged on the upper surface of the steel support plate, and the bolts are connected to the reinforced concrete top plate by post-casting. The above structure has the following problems: ① The welded joints and bolted post-cast connections are rigid connections, formed in one step, cannot be dismantled, and lack recycling capabilities; ② Bolted post-cast connections and other strong occupation of key lines will reduce on-site construction efficiency; ③ The overall prefabricated corrugated web steel box-concrete composite beam is large and irregular in size, and the storage space is large and inconvenient for transportation. Application No. is

[0004] The Chinese patent No. 201310418970.9 discloses an assembled corrugated web interlocking H-shaped steel composite beam, which is composed of an upper flange, a web, a lower flange, a corrugated steel plate, a reinforced concrete wing plate, bolts, and transverse steel bars; the reinforced concrete wing plate, the corrugated steel plate, and the upper flange are fixed by bolts, and the upper flange and the lower flange are connected to the web plate by single-sided fillet welds. The above structure and construction method have the following problems: ① The fillet weld connection and the bolt connection are both permanent connection structures, which makes it inconvenient to maintain and replace the reinforced concrete wing plate in the later stage; ② The reinforced concrete wing plate connected by bolts adopts a cast-in-place construction process, which pollutes the installed web and other components, and prolongs the construction period; ③ After the H-shaped steel beam is prefabricated, it is stacked in the factory for on-site transportation, which occupies a large space and is difficult to transport. Therefore, although the prefabricated assembled corrugated web composite beam is gradually used in engineering, it still does not solve the problems of coexistence of prefabrication and cast-in-place, low construction efficiency, non-detachable components, large beam storage site occupation, and difficulty in transportation of large components. Utility Model Content

[0005] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0006] In order to achieve these purposes and other advantages according to the utility model, a quick connector suitable for a fully assembled composite beam is provided, comprising: a corrugated steel web, two embedded plates and a bolt connector; flange plates are fixedly provided at both ends of the corrugated steel web; the embedded plate comprises an embedded portion and a connecting portion fixedly connected to each other, the embedded portion is partially embedded in the top plate or the bottom plate of the composite beam, the two connecting portions are respectively connected to one of the flange plates, a plurality of oblong holes are symmetrically provided on the connecting portion and the flange plate, and the connecting portion and the corresponding oblong holes on the flange plate are connected by the bolt connector.

[0007] Preferably, the length-to-width ratio of the oblong hole is 1:1 to 1:5.

[0008] Preferably, the bolt connector includes a bolt and two nuts threadedly connected to the bolt, and a gasket is provided between the two nuts and the connecting portion and the flange plate.

[0009] Preferably, the number of the embedded parts is two, and the two embedded parts are symmetrically arranged on both sides of the connecting part, so that the cross-sectional shape of the embedded plate is U-shaped.

[0010] Preferably, the bolt portion is pre-embedded in the top plate or bottom plate of the composite beam.

[0011] Preferably, the embedded portion is fixedly connected to the middle portion of the connecting portion so that the cross-sectional shape of the embedded plate is T-shaped.

[0012] Preferably, the embedded portion is a short corrugated steel web, the connecting portion is a matching flange plate, and the length of the embedded portion is 10 to 50 cm.

[0013] Preferably, matching positioning points are respectively provided at both ends of the connecting portion and the flange plate.

[0014] Preferably, the top plate and the bottom plate of the composite beam are both prefabricated concrete components containing a steel reinforcement skeleton, and the embedded portion is fixedly connected to the steel reinforcement skeleton.

[0015] The utility model at least has the following beneficial effects:

[0016] 1. The utility model provides a quick connector suitable for fully assembled composite beams. The flange plates at both ends of the corrugated steel web are connected to the embedded plates on the top plate and the bottom plate of the composite beam through detachable bolt connectors. After the matching and alignment are completed, they can be quickly connected into a whole through a torque wrench. No large-scale installation equipment and templates are required, which is convenient for construction. The bolt connector is easy to disassemble. For the top plate of the composite beam, which is prone to damage due to direct bearing of repeated wheel loads, the top plate can be quickly replaced, which reduces traffic interruption time and facilitates maintenance.

[0017] 2. The utility model provides quick connectors suitable for fully assembled composite beams. Corrugated steel webs, top plates, bottom plates, embedded parts and other components can be modularly prefabricated in engineering assembly lines, which is convenient for transportation, hoisting and streamlined operations on construction sites.

[0018] 3. The utility model provides a quick connector suitable for fully assembled composite beams, and provides three structural forms of embedded plates, which can be flexibly selected according to the specific structure of the top plate and the bottom plate of the composite beam, and has strong adaptability.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the quick connector when the embedded plate in the utility model is the structure described in form 1;

[0021] Figure 2 It is a structural schematic diagram of the quick connector when the embedded plate in the utility model is the structure described in form 2;

[0022] Figure 3 It is a structural schematic diagram of the quick connector when the embedded plate in the utility model is the structure described in form three;

[0023] Figure 4This is a schematic diagram of the structure of the oblong hole of the utility model; DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0025] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] like Figures 1 to 4 As shown, the utility model provides a quick connector suitable for a fully assembled composite beam, comprising: a corrugated steel web 4, two embedded plates 2 and a bolt connector 6; flange plates 3 are fixedly arranged at both ends of the corrugated steel web 4; the embedded plate 2 comprises an embedded portion 21 and a connecting portion 22 fixedly connected to each other, the embedded portion 21 is partially embedded in the top plate 1 or the bottom plate 5 of the composite beam, the two connecting portions 22 are respectively connected to one of the flange plates 3, a plurality of oblong holes 7 are symmetrically opened on the connecting portion 22 and the flange plates 3, and the connecting portion 22 and the corresponding oblong holes 7 on the flange plates 3 are connected through the bolt connector 6.

[0027] In this technical solution, the embedded part 2 includes an embedded portion 21 and a connecting portion 22. The embedded portion 21 is used to be fixedly connected to the top plate 1 or the bottom plate 5 of the composite beam, and the connecting portion 22 is used to be connected to the corrugated steel web 4. Combined with the bolt connector 6, the corrugated steel web 4 can be quickly connected and disassembled with the top plate 1 and the bottom plate 5 of the composite beam, which is convenient for modular prefabrication, transportation, hoisting and streamlined operation of the corrugated steel web 4 and the top plate 1 and the bottom plate 4 at the construction site. In addition, the embedded portion 21 is partially embedded in the top plate 1 or the bottom plate 5 of the composite beam, providing an operating space for the installation and removal operation between the connecting portion 22 and the flange plate 3. Compared with the prior art in which the embedded plate and the connecting member are completely embedded in the top plate 1 or the bottom plate 4, the installation and removal efficiency can be further improved. The embedded portion 21 can flexibly select the length according to the designed spacing between the top plate 1 and the bottom plate 5 and the length of the corrugated steel web 4, and can adapt to the construction of composite beams of various sizes.

[0028] Furthermore, the top plate 1 and the bottom plate 5 of the composite beam are both prefabricated concrete components containing a steel skeleton, and the embedded portion 21 is fixedly connected to the steel skeleton. When the embedded portion 21 is embedded, one end thereof is fixedly connected to the steel skeleton in the top plate 1 or the bottom plate 5.

[0029] In another embodiment, the length-to-width ratio of the oblong hole 7 is 1:1 to 1:5. By using the oblong hole 7 of appropriate size, the strength of the flange plate 3 and the connecting portion 22 is ensured while reducing the matching accuracy requirement when the two are connected, ensuring that the two can be matched and connected smoothly, thereby improving the connection and installation efficiency.

[0030] In another embodiment, the bolt connector 6 includes a bolt 61 and two nuts 62 threadedly connected to the bolt, and gaskets are provided between the two nuts 62 and the connecting portion 22 and the flange plate 3. The two nuts 62 respectively connect and fix the connecting portion 22 and the flange plate 3 from both sides thereof, thereby jointly ensuring the stability of the connection.

[0031] In another embodiment, if Figure 4 As shown, in order to facilitate the positioning between the connection part 22 and the flange plate 3, matching positioning points 8 are respectively provided at both ends of the connection part 22 and the flange plate 3. After the corrugated steel web 4 and the flange plate 3 are fixed, the flange plate 3 is aligned with the corresponding matching positioning points 8 on the connection part 22, and then the oblong holes 7 are drilled together to further improve the installation accuracy.

[0032] In another embodiment, according to the specific structure of the top plate 1 and the bottom plate 4 of the composite beam, the embedded plate 2 can adopt the following three structural forms:

[0033] Form 1: The embedded portion 21 is provided in two pieces, and the two embedded portions 21 are symmetrically arranged on both sides of the connecting portion 22, so that the cross-sectional shape of the embedded plate 2 is U-shaped. The bolt 61 is partially embedded in the top plate 1 or the bottom plate 5 of the composite beam. Figure 1, the two embedded parts 21 are partially embedded in the top plate 1 or the bottom plate 5, so that the connecting part 22 is set at a certain distance from the top plate 1 or the bottom plate 5, thereby providing an operating space for the nut 62 on one side of the connecting part 22. When in use, first fix the corrugated steel web 4 with the flange plates 3 at both ends, then position and match the connecting part 22 with the flange plates 3, and then fix the embedded part 21 and the bolts with the steel skeleton in the top plate 1 or the bottom plate 5, and pour the concrete of the top plate 1 or the bottom plate 5; remove the nuts 62 and gaskets on the bottom plate 5 away from each bolt 61, and align the flange plate 3 at the lower end of the corrugated steel web 4 with the oblong hole 7 on the connecting part 22. and the bolts 61, then add gaskets and tighten the nuts to complete the rapid installation of the corrugated steel web 4 and the bottom plate 5; use a lifting device to lift the top plate 1 to the predetermined site, remove the nuts 62 and gaskets on the side of each bolt 61 on the top plate away from the top plate 1, align the connecting part 22 and the bolts 61 on the top plate 1 with the oblong holes 7 on the flange plate 3 at the upper end of the corrugated steel web 4, then add gaskets and tighten the nuts to complete the rapid installation of the corrugated steel web 4 and the top plate 1.

[0034] Form 2: The embedded portion 21 is fixedly connected to the middle of the connecting portion 22 so that the cross-sectional shape of the embedded plate 21 is T-shaped. Figure 2 In this technical solution, the bolts 61 do not need to be embedded in the top plate 1 or the bottom plate 5, which can further improve the construction efficiency. When in use, the corrugated steel web 4 is first fixedly connected to the flange plates 3 at both ends, and then the connecting portion 22 is positioned and matched with the flange plates 3 and drilled, and then the embedded portion 21 is fixedly connected to the steel skeleton in the top plate 1 or the bottom plate 5 to prefabricate the top plate 1 or the bottom plate 5; and then, in the manner of first the bottom plate 5 and then the top plate 1, the corrugated steel web 4 is quickly connected to the bottom plate 5 and the top plate 1 in sequence by the bolts 61 and the nuts 62.

[0035] Form 3: The embedded portion 21 is a short corrugated steel web, the connecting portion 22 is a matching flange plate, and the length of the embedded portion 21 is 10 to 50 cm. Figure 3For the composite beam with a large interval between the top plate 1 and the bottom plate 5, the structural advantage of the corrugated steel web is fully utilized. The embedded part 21 also adopts a corrugated steel web structure, specifically a short corrugated steel web with a height of 10 to 50 cm. Similarly, the connecting part 22 can also adopt the same structure as the flange plate 3. In addition, the corrugated steel web 4 does not need to be customized and lengthened, nor does it need to be transported by special vehicles, which further reduces the construction cost. When in use, the corrugated steel web 4 is first fixedly connected to the flange plates 3 at both ends, and then the connecting part 22 is positioned and matched with the flange plates 3 by drilling holes, and then one end of the short corrugated steel web is fixedly connected to the steel skeleton in the top plate 1 or the bottom plate 5 to prefabricate the top plate 1 or the bottom plate 5; then, in the manner of first the bottom plate 5 and then the top plate 1, the corrugated steel web 4 is quickly connected to the bottom plate 5 and the top plate 1 in sequence by the bolts 61 and the nuts 62.

[0036] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A quick connector suitable for a fully assembled composite beam, characterized in that: include: A corrugated steel web, two embedded plates and bolt connectors; flange plates are fixedly arranged at both ends of the corrugated steel web; the embedded plate comprises an embedded part and a connecting part fixedly connected to each other, the embedded part is partially embedded in the top plate or bottom plate of the composite beam, the two connecting parts are respectively connected to one flange plate, a plurality of oblong holes are symmetrically provided on the connecting part and the flange plate, and the connecting part and the corresponding oblong holes on the flange plate are connected by the bolt connectors; the embedded part is fixedly connected to the middle part of the connecting part, so that the cross-sectional shape of the embedded plate is T-shaped; the embedded part is a short corrugated steel web, the connecting part is a matching flange plate, and the length of the embedded part is 10~50cm.

2. The quick connector for a fully assembled composite beam according to claim 1, characterized in that: The length-to-width ratio of the oblong hole is 1:1-1:

5.

3. The quick connector for a fully assembled composite beam according to claim 1, characterized in that: The bolt connector includes a bolt and two nuts threadedly connected to the bolt, and gaskets are arranged between the two nuts and the connecting portion and the flange plate.

4. The quick connector for a fully assembled composite beam according to claim 1, characterized in that: Matching positioning points are respectively arranged at both ends of the connecting portion and the flange plate.

5. The quick connector for a fully assembled composite beam according to claim 1, characterized in that: The top plate and the bottom plate of the composite beam are both prefabricated concrete components containing a steel bar skeleton, and the embedded part is fixedly connected to the steel bar skeleton.

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