A spliced ​​laminated plate structure

Abstract

The present invention relates to the field of building technology, and discloses a spliced ​​composite plate structure, comprising a first composite plate and a second composite plate, wherein the first composite plate comprises a first prefabricated plate, a first cast-in-place composite layer and a first welded steel bar frame, and the second composite plate comprises a second prefabricated plate, a second cast-in-place composite layer and a second welded steel bar frame, a first force-bearing steel bar assembly and a first connecting steel bar mesh are arranged between the first composite plate and the second composite plate, the first prefabricated plate and the second prefabricated plate are abutted against each other, the first cast-in-place composite layer and the second cast-in-place composite layer are cast as a whole, the first welded steel bar frame and the second welded steel bar frame are integral grid steel bar structures, which play a welding and fixing role, so that the thickness of the first prefabricated plate and the second prefabricated plate can be reduced during production, and the shear resistance effect is uniformly played, and a large amount of steel bar binding is not required on site, which greatly reduces the workload on the construction site and improves the construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a spliced ​​composite plate structure. Background Art

[0002] At present, the most commonly used floor form of prefabricated concrete structures in the construction industry is the trussed reinforced concrete composite slab, which is fixed to the support with steel bars, and finally concrete is poured on the support and the space to be poured between one or more spliced ​​composite slabs.

[0003] The main function of the truss steel bars used in existing composite slabs is to increase the rigidity and bearing capacity of the prefabricated bottom plate during demoulding and hoisting of the prefabricated bottom plate components (short-term working conditions). After the construction and installation are completed, the prefabricated bottom plate forms a composite slab with the cast-in-place composite layer concrete (normal use conditions). A shear-resistant structure needs to be set at the interface between the prefabricated bottom plate and the cast-in-place composite layer of the composite slab. However, the existing truss steel bar arrangement density is not large and cannot completely cover the interface, resulting in unreasonable structural stress. Moreover, at the construction site, for the spliced ​​truss steel bar composite slab, the connecting steel bars between the plates and the force-bearing steel bars of the cast-in-place composite layer need to be manually tied to the truss steel bars, which results in a large workload at the construction site, reduced construction efficiency, and high construction costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to achieve more uniform and reasonable force between the spliced ​​composite plates and improve the construction efficiency.

[0005] In order to solve the above technical problems, the present invention provides a spliced ​​laminated plate structure, comprising a first laminated plate and a second laminated plate spliced ​​with the first laminated plate.

[0006] The first composite plate comprises a first prefabricated plate, a first cast-in-place composite layer, and a first welded steel bar frame for connecting the first prefabricated plate and the first cast-in-place composite layer, the first welded steel bar frame comprises a first steel mesh, a second steel mesh, and a first connecting steel bar, the first steel mesh is located in the first prefabricated plate, the second steel mesh is located in the first cast-in-place composite layer, one end of the first connecting steel bar is welded to the first steel mesh, the other end of the first connecting steel bar is welded to the second steel mesh, and an end of the second steel mesh is indented inwardly relative to an end of the first prefabricated plate,

[0007] The second composite plate comprises a second precast plate, a second cast-in-place composite layer, and a second welded steel bar frame for connecting the second precast plate and the second cast-in-place composite layer, the second welded steel bar frame comprises a third steel mesh, a fourth steel mesh, and a second connecting steel bar, the third steel mesh is located in the second precast plate, the fourth steel mesh is located in the second cast-in-place composite layer, one end of the second connecting steel bar is welded to the third steel mesh, the other end of the second connecting steel bar is welded to the fourth steel mesh, and an end of the fourth steel mesh is indented inwardly relative to an end of the second precast plate,

[0008] A first stressed steel bar assembly is provided between the first composite plate and the second composite plate, one end of the first stressed steel bar assembly is connected to the second steel mesh, the other end of the first stressed steel bar assembly is connected to the fourth steel mesh, the first precast plate and the second precast plate are abutted, and the first cast-in-place composite layer and the second cast-in-place composite layer are cast as one.

[0009] As a preferred solution, both ends of the first stressed steel bar assembly are mechanical anchoring ends bent downward.

[0010] As a preferred embodiment, a first connecting steel mesh is provided between the first composite plate and the second composite plate, one end of the first connecting steel mesh is located on the top surface of the first prefabricated plate, and the other end of the first connecting steel mesh is located on the top surface of the second prefabricated plate.

[0011] As a preferred solution, a first cutout arranged downwardly slanting is provided on the top edge of the first prefabricated board, and a second cutout arranged downwardly slanting is provided on the top edge of the second prefabricated board. The first cutout and the second cutout are arranged opposite to each other to form a first connecting groove.

[0012] As a preferred embodiment, a first notch recessed upward is provided on the bottom edge of the first prefabricated plate, and a second notch recessed upward is provided on the bottom edge of the second prefabricated plate. The first notch and the second notch are arranged opposite to each other to form a second connecting groove, and an elastic mesh cloth is provided in the second connecting groove.

[0013] As a preferred solution, the first steel mesh includes a first transverse steel bar and a first longitudinal steel bar intersecting with the first transverse steel bar, the first transverse steel bar and the first longitudinal steel bar are welded together, the second steel mesh includes a second transverse steel bar and a second longitudinal steel bar intersecting with the second transverse steel bar, the second transverse steel bar and the second longitudinal steel bar are welded together, one end of the first connecting steel bar is welded together with the intersection point between the first transverse steel bar and the first longitudinal steel bar, and the other end of the first connecting steel bar is welded together with the intersection point between the second transverse steel bar and the second longitudinal steel bar,

[0014] The third steel mesh includes third transverse steel bars and third longitudinal steel bars intersecting with the third transverse steel bars, and the third transverse steel bars and the third longitudinal steel bars are welded and connected. The fourth steel mesh includes fourth transverse steel bars and fourth longitudinal steel bars intersecting with the fourth transverse steel bars, and the fourth transverse steel bars and the fourth longitudinal steel bars are welded and connected. One end of the second connecting steel bar is welded and connected to the intersection between the third transverse steel bar and the third longitudinal steel bar, and the other end of the second connecting steel bar is welded and connected to the intersection between the fourth transverse steel bar and the fourth longitudinal steel bar.

[0015] As a preferred solution, it also includes a support for fixing the first superimposed plate, the first superimposed plate is arranged on one side of the support, the support includes a support steel bar frame and a support body, the support steel bar frame is arranged in the support body,

[0016] A second stress-bearing steel bar assembly is provided between the support and the first composite plate, one end of the second stress-bearing steel bar assembly extends into the support body, the other end of the second stress-bearing steel bar assembly is connected to the second steel mesh, and the support body and the first cast-in-place composite layer are cast as one.

[0017] As a preferred solution, a second connecting steel mesh is provided between the support and the first composite plate, one end of the second connecting steel mesh is located on the top surface of the first prefabricated plate, and the second connecting steel mesh extends into the support body.

[0018] As a preferred embodiment, one end of the second stressed steel bar assembly extending into the support body is a first connecting end extending toward the other side of the support body, and the first connecting end is connected to the second steel mesh of another first composite plate.

[0019] As a preferred embodiment, one end of the second connecting steel mesh extending into the support body is a second connecting end extending to the other side of the support body, and the second connecting end is located on the top surface of the first prefabricated plate of another first composite plate.

[0020] Compared with the prior art, the spliced ​​composite plate structure provided by the present invention has the following beneficial effects:

[0021] The present invention utilizes the first connecting steel bar to weld and connect with the first steel mesh and the second steel mesh to form a first welded steel frame of an integral mesh steel structure, and also forms a second welded steel frame of an integral mesh steel structure. Since the first connecting steel bar plays a welding and fixing role on the first steel mesh, and the second connecting steel bar plays a welding and fixing role on the third steel mesh, the thickness of the first prefabricated board and the second prefabricated board can be reduced during production, and the production materials can be reduced. Moreover, the first connecting steel bar and the second connecting steel bar occupy a small space, and the arrangement density can be increased, and the shear resistance can be uniformly played to ensure that the first superimposed board and the second superimposed board form an integral superimposed force mode, and the structural force is more reasonable. During construction and splicing, because the first welded steel frame and the second welded steel frame have been completed in the factory, there is no need to perform a large amount of steel bar binding on site. The first force-bearing steel bar assembly is used to connect the second steel mesh and the fourth steel mesh, and a tensile force is played on the first superimposed board and the second superimposed board. The structure after casting is more stable and reliable, not easy to crack, which greatly reduces the workload on the construction site and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the splicing state of the spliced ​​composite plate structure of the preferred embodiment of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the installation state of the intermediate support of the spliced ​​composite plate structure of the preferred embodiment of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the installation state of the edge supports of the spliced ​​composite plate structure of the preferred embodiment of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the first and second superimposed plates in the spliced ​​superimposed plate structure of the preferred embodiment of the present invention in an uncast state.

[0026] Figure 5 for Figure 4 Schematic diagram of the structure from another perspective.

[0027] In the figure:

[0028] 100. first composite plate; 110. first precast plate; 120. first cast-in-place composite layer; 130. first steel mesh; 131. first transverse steel bar; 132. first longitudinal steel bar; 140. second steel mesh; 141. second transverse steel bar; 142. second longitudinal steel bar; 150. first connecting steel bar;

[0029] 200. second composite plate; 210. second precast plate; 220. second cast-in-place composite layer; 230. third steel mesh; 231. third transverse steel bar; 232. third longitudinal steel bar; 240. fourth steel mesh; 241. fourth transverse steel bar; 242. fourth longitudinal steel bar; 250. second connecting steel bar;

[0030] 300. First stress-bearing steel bar assembly; 310. First transverse stress-bearing steel bar; 320. First longitudinal stress-bearing steel bar;

[0031] 400. first connecting steel mesh; 410. first transverse connecting steel bar; 420. first longitudinal connecting steel bar;

[0032] 500. First connection slot;

[0033] 600. Second connection slot;

[0034] 700. Support; 710. Support reinforcement frame; 711. Horizontal reinforcement; 712. Vertical reinforcement; 720. Support body;

[0035] 800. Second stress-bearing steel bar assembly; 810. Second transverse stress-bearing steel bar; 820. Second longitudinal stress-bearing steel bar;

[0036] 900. Second connecting steel mesh; 910. Second transverse connecting steel bar; 920. Second longitudinal connecting steel bar; DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0039] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides a spliced ​​laminated plate structure, comprising at least a first laminated plate 100 and a second laminated plate 200 spliced ​​with the first laminated plate 100.

[0041] The first composite plate 100 includes a first precast plate 110, a first cast-in-place composite layer 120, and a first welded steel bar frame for connecting the first precast plate 110 and the first cast-in-place composite layer 120. The first welded steel bar frame includes a first steel mesh 130, a second steel mesh 140, and a first connecting steel bar 150. The first steel mesh 130 is located in the first precast plate 110, and the second steel mesh 140 is located in the first cast-in-place composite layer 120. One end of the first connecting steel bar 150 is welded to the first steel mesh 130, and the other end of the first connecting steel bar 150 is welded to the second steel mesh 140. The end of the second steel mesh 140 is indented inward relative to the end of the first precast plate 110.

[0042] The second composite plate 200 includes a second precast plate 210, a second cast-in-place composite layer 220, and a second welded steel bar frame for connecting the second precast plate 210 and the second cast-in-place composite layer 220, the second welded steel bar frame includes a third steel mesh 230, a fourth steel mesh 240, and a second connecting steel bar 250, the third steel mesh 230 is located in the second precast plate 210, the fourth steel mesh 240 is located in the second cast-in-place composite layer 220, one end of the second connecting steel bar 250 is welded to the third steel mesh 230, the other end of the second connecting steel bar 250 is welded to the fourth steel mesh 240, and the end of the fourth steel mesh 240 is indented inward relative to the end of the second precast plate 210.

[0043] A first stressed steel bar assembly 300 is provided between the first composite plate 100 and the second composite plate 200, one end of the first stressed steel bar assembly 300 is connected to the second steel mesh 140, and the other end of the first stressed steel bar assembly 300 is connected to the fourth steel mesh 240, the first precast plate 110 and the second precast plate 210 are abutted, and the first cast-in-place composite layer 120 and the second cast-in-place composite layer 220 are cast as a whole.

[0044] Based on the above-mentioned technical features, the spliced ​​composite plate structure is connected by welding the first connecting steel bar 150 with the first steel mesh 130 and the second steel mesh 140 to form a first welded steel frame of an integral grid steel structure, and also forms a second welded steel frame of an integral grid steel structure. Since the first connecting steel bar 150 plays a welding and fixing role for the first steel mesh 130, and the second connecting steel bar 250 plays a welding and fixing role for the third steel mesh 230, the thickness of the first prefabricated plate 110 and the second prefabricated plate 210 can be reduced during production, and the production materials can be reduced. In addition, the first connecting steel bar 150 and the second connecting steel bar 250 occupy a small space, which can increase the layout density and evenly play a shear resistance role to ensure that the first composite plate 100 and the second composite plate 200 form an overall overlapping force mode, and the structural force is more reasonable. During construction and splicing, since the first welded steel bar frame and the second welded steel bar frame have been completed in the factory, there is no need to carry out a large amount of steel bar tying on site. The first force-bearing steel bar assembly 300 is used to connect the second steel mesh 140 and the fourth steel mesh 240 to exert a tensile force on the first composite plate 100 and the second composite plate 200. The cast structure is more stable and reliable and not prone to cracking, which greatly reduces the workload on the construction site and improves construction efficiency.

[0045] like Figure 1 As shown, in this embodiment, both ends of the first stressed steel bar assembly 300 are downwardly bent mechanical anchoring ends, which play a better role in steel bar lap connection, thereby reducing the lap length with the second steel mesh 140 and the fourth steel mesh 240. It can be understood that the first stressed steel bar assembly 300 can also use other mechanical anchoring ends to achieve the same steel bar lap connection effect.

[0046] In this embodiment, a first connecting steel mesh 400 is provided between the first composite plate 100 and the second composite plate 200, one end of the first connecting steel mesh 400 is located on the top surface of the first prefabricated plate 110, and the other end of the first connecting steel mesh 400 is located on the top surface of the second prefabricated plate 210. The first connecting steel mesh 400 and the first stressed steel bar assembly 300 jointly play a connecting role in the up and down directions, have better overlapping performance, and ensure that the connection between the first composite plate 100 and the second composite plate 200 is tighter.

[0047] In this embodiment, a first incision inclined downward is provided on the top edge of the first precast panel 110, and a second incision inclined downward is provided on the top edge of the second precast panel 210. The first incision and the second incision are arranged relative to each other to form a first connecting groove 500. The longitudinal cross-section of the first incision and the second incision is an isosceles right triangle, forming an angle of 45° with the horizontal plane. The first connecting groove 500 is a V-shaped groove, so that when the first cast-in-place composite layer 120 and the second cast-in-place composite layer 220 are cast as one, the first connecting groove 500 can accommodate part of the casting material, forming a thicker protective layer for the first connecting steel mesh 400, thereby improving the durability of the joint and further improving the stability after splicing.

[0048] In this embodiment, a first notch recessed upward is provided on the bottom edge of the first prefabricated panel 110, and a second notch recessed upward is provided on the bottom edge of the second prefabricated panel 210. The first notch and the second notch are arranged relative to each other to form a second connecting groove 600. An elastic mesh cloth is provided in the second connecting groove 600. The second connecting groove 600 is a U-shaped groove. The second connecting groove 600 provides a sealed space for plate seam treatment. An elastic mesh cloth is hung in the second connecting groove 600 and filled with elastic putty. The mesh treatment can prevent the plate seam from deforming and cracking due to shrinkage. This method adopts a method of dividing into multiple blocks, which is suitable for composite plate structures with larger spans.

[0049] In this embodiment, the first steel mesh 130 includes a first transverse steel bar 131 and a first longitudinal steel bar 132 intersecting the first transverse steel bar 131, and the first transverse steel bar 131 and the first longitudinal steel bar 132 are welded together. The second steel mesh 140 includes a second transverse steel bar 141 and a second longitudinal steel bar 142 intersecting the second transverse steel bar 141, and the second transverse steel bar 141 and the second longitudinal steel bar 142 are welded together. One end of the first connecting steel bar 150 is welded to the intersection between the first transverse steel bar 131 and the first longitudinal steel bar 132, and the other end of the first connecting steel bar 150 is welded to the intersection between the second transverse steel bar 141 and the second longitudinal steel bar 142, so that the first connecting steel bar 150 is subjected to transverse and longitudinal force distribution at the intersection, and the structure of the first welded steel bar frame is more stable.

[0050] The third steel mesh 230 includes a third transverse steel bar 231 and a third longitudinal steel bar 232 intersecting the third transverse steel bar 231, and the third transverse steel bar 231 and the third longitudinal steel bar 232 are welded and connected. The fourth steel mesh 240 includes a fourth transverse steel bar 241 and a fourth longitudinal steel bar 242 intersecting the fourth transverse steel bar 241, and the fourth transverse steel bar 241 and the fourth longitudinal steel bar 242 are welded and connected. One end of the second connecting steel bar 250 is welded and connected to the intersection between the third transverse steel bar 231 and the third longitudinal steel bar 232, and the other end of the second connecting steel bar 250 is welded and connected to the intersection between the fourth transverse steel bar 241 and the fourth longitudinal steel bar 242, so that the second connecting steel bar 250 is subjected to transverse and longitudinal force distribution at the intersection, and the structure of the second welded steel bar frame is more stable. On the one hand, because the connecting steel bars and the first steel mesh 130 in the precast panel have formed a welding fixation to form a spatial steel bar structure, the bending stiffness is relatively large, so that the thickness of the precast panel can be reduced during production, such as the thickness of the precast panel can be reduced to 40 mm. On the other hand, the first connecting steel bars 150 and the second connecting steel bars 250 are arranged at each vertical intersection point to evenly play a shearing role and act on the intersection surface of the precast panel and the cast-in-place composite layer to form an overall composite stress mode. The top surface of the first precast panel 110 and the top surface of the second precast panel 210 do not need to be rough, and a natural concrete flat surface can be formed by casting during production, thereby reducing the production process of the first precast panel 110 and the second precast panel 210 and improving production efficiency.

[0051] In addition, the first connecting steel bar 150 and the second connecting steel bar 250 are arranged along the vertical direction, and the relative relationship between the first transverse steel bar 131 and the first longitudinal steel bar 132 can be flexibly arranged so that the short stress-bearing bars are arranged at the outermost side at the bottom. Similarly, the relative relationship between the second transverse steel bar 141 and the second longitudinal steel bar 142 can be flexibly arranged so that the short stress-bearing bars are arranged at the outermost side at the top, so that the short stress-bearing bars of the first welded steel bar frame are all at the outermost side. Similarly, the relative relationship between the third transverse steel bar 231 and the third longitudinal steel bar 232 can be flexibly arranged so that the short stress-bearing bars are arranged at the outermost side at the bottom. Similarly, the relative relationship between the fourth transverse steel bar 241 and the fourth longitudinal steel bar 242 can be flexibly arranged so that the short stress-bearing bars are arranged at the outermost side at the top, so that the short stress-bearing bars of the second welded steel bar frame are all at the outermost side. In this embodiment, the mounting structure also includes a support 700 for fixing the first composite plate 100, the first composite plate 100 is arranged on one side of the support 700, the support 700 includes a support steel bar frame 710 and a support body 720, the support steel bar frame 710 is arranged in the support body 720, a second stress-bearing steel bar assembly 800 is provided between the support 700 and the first composite plate 100, one end of the second stress-bearing steel bar assembly 800 extends into the support body 720, the other end of the second stress-bearing steel bar assembly 800 is connected to the second steel mesh 140, and the support body 720 and the first cast-in-place composite layer 120 are cast as a whole.

[0052] Using the same structural design as splicing, the support body 720 and the second steel mesh 140 in the first cast-in-place composite layer 120 are connected through the second force-bearing steel bar assembly 800, ensuring that the steel bars in the first cast-in-place composite layer 120 penetrate deep into the support 700 to bear the force. The structure installed on the support 700 is more stable and reliable and is suitable for support structures such as side supports and intermediate supports.

[0053] Among them, combined Figure 4 and Figure 5 As shown, by indenting the end of the second steel mesh 140 inward, installation space is provided for the first stressed steel bar assembly 300 and the second stressed steel bar assembly 800. Therefore, it is suitable for arranging the first composite board 100 divided into multiple prefabricated boards within the range of the support 700, and is applicable to both single composite boards and spliced ​​composite boards.

[0054] In this embodiment, if Figure 2 and Figure 3As shown, a second connecting steel mesh 900 is provided between the support 700 and the first composite plate 100, one end of the second connecting steel mesh 900 is located on the top surface of the first prefabricated plate 110, and the second connecting steel mesh 900 extends into the support body 720. The second force-bearing steel bar assembly 800 and the second connecting steel mesh 900 play a connecting role in the up and down directions, and have better overlapping performance, thereby ensuring that the first composite plate 100 is firmly connected to the support 700.

[0055] In this embodiment, if Figure 2 As shown, when the support 700 is an intermediate support, one end of the second stress-bearing steel bar assembly 800 extending into the support body 720 is a first connection end extending to the other side of the support body 720, and the first connection end is connected to the second steel mesh 140 of another first composite plate 100, and the end of the second stress-bearing steel bar assembly 800 is connected using the space inwardly retracted by the end of the second steel mesh 140, so as to realize the installation of the two first composite plates 100 on the intermediate support and ensure that the two first composite plates 100 are more stably stressed relative to the support 700.

[0056] Furthermore, when the support 700 is an intermediate support, one end of the second connecting steel mesh 900 extending into the support body 720 is a second connecting end extending to the other side of the support body 720, and the second connecting end is located on the top surface of the first prefabricated plate 110 of another first composite plate 100. By using the same second stress steel bar assembly 800 and the second connecting steel mesh 900, a fixed connection between the two second composite plates 200 and the intermediate support is achieved, and each first composite plate 100 is stably installed on the support 700.

[0057] In this embodiment, if Figure 3 As shown, when the support 700 is an edge support, one end of the second stressed steel bar assembly 800 located in the support body 720 is a bent end bent axially downward along the support body 720, forming a pulling force on the first composite plate 100 to ensure that there is sufficient rigidity between the support 700 and the first composite plate 100. The second stressed steel bar assembly 800 and the second connecting steel mesh 900 must at least pass through the center line of the support 700 to ensure that there is sufficient bearing strength between the first composite plate 100 and the support 700.

[0058] Among them, the first stressed steel bar assembly 300 is connected to the second steel mesh 140 and the fourth steel mesh 240 by binding, and the second stressed steel bar assembly 800 is connected to the second steel mesh 140 by binding. Only a small amount of binding is required on the first stressed steel bar assembly 300 and the second stressed steel bar assembly 800 on site, and the first connecting steel mesh 400 and the second connecting steel mesh 900 are directly placed on the top surface of the corresponding prefabricated panel, so the on-site construction efficiency is high.

[0059] In this embodiment, combined with Figures 1 to 3 As shown, the first stress-bearing steel bar assembly 300 includes a plurality of first transverse stress-bearing steel bars 310 and a first longitudinal stress-bearing steel bar 320, and the first transverse stress-bearing steel bars 310 and the first longitudinal stress-bearing steel bars 320 intersect and are tied together; the first connecting steel bar mesh 400 includes a plurality of first transverse connecting steel bars 410 and a first longitudinal connecting steel bar 420, and the first transverse connecting steel bars 410 and the first longitudinal connecting steel bars 420 intersect and are welded together; the second stress-bearing steel bar assembly 800 includes a plurality of second transverse stress-bearing steel bars 810 and a second longitudinal stress-bearing steel bars 820, and the second transverse stress-bearing steel bars 810 and the second longitudinal stress-bearing steel bars 820 intersect and are tied together; the second connecting steel bar mesh 900 includes a plurality of second transverse connecting steel bars 910 and a second longitudinal connecting steel bars 920, and the second transverse connecting steel bars 910 and the second longitudinal connecting steel bars 920 intersect and are welded together. The first connecting steel mesh 400 and the second connecting steel mesh 900 are welded into a whole piece, and the factory directly performs the welding operation. The construction site only needs to perform simple binding of the first stress-bearing steel bar assembly 300 and the second stress-bearing steel bar assembly 800, which reduces the production difficulty and improves the on-site construction efficiency.

[0060] In this embodiment, the support steel bar frame 710 includes a plurality of horizontal steel bars 711 and a plurality of vertical steel bars 712. The horizontal steel bars 711 and the vertical steel bars 712 intersect and are tied together. The support body 720 and the two cast-in-place overlapping layers are integrally cast with concrete to achieve casting as a whole and have sufficient structural rigidity.

[0061] Among them, the first welded steel bar frame and the second welded steel bar frame play a role in production demoulding and component hoisting (short-term working conditions), and can also play the role of stress-bearing steel bars after the cast-in-place superimposed layer is cast to form a superimposed plate (normal working conditions). Therefore, the first welded steel bar frame and the second welded steel bar frame can play a role in each stage. According to calculations, for superimposed plates of the same thickness, the total amount of steel bars used in the superimposed plates of this embodiment is less than that of traditional superimposed plates.

[0062] The working process of the installation structure of the present invention is as follows: the first welded steel frame and the second welded steel frame are welded in the factory, and the first prefabricated panel 110 and the second prefabricated panel 210 are produced, and the first connecting steel mesh 400 and the second connecting steel mesh 900 are welded. (1) On-site splicing process: the first welded steel frame and the second welded steel frame are hoisted into place by using the intersection point, the first connecting steel mesh 400 is placed, the first stressed steel bar assembly 300 is tied, the first cast-in-place superimposed layer 120 and the second cast-in-place superimposed layer 220 are cast as one, the first connecting groove 500 is provided with an elastic mesh cloth, and is filled with elastic putty, and a mesh is hung to prevent cracking. (2) Support construction process: Use the intersection of the first welded steel frame and the second welded steel frame to hoist them into place, place the second connecting steel mesh 900, tie the second stress-bearing steel bar assembly 800, insert the second connecting steel mesh 900 and the second stress-bearing steel bar assembly 800 into the support body 720, and finally cast the first cast-in-place composite layer 120 and the support body 720 as a whole.

[0063] In summary, the embodiment of the present invention provides a spliced ​​composite plate structure with the following advantages: (1) the thickness of the first prefabricated plate 110 and the second prefabricated plate 210 can be reduced, the production cost and the self-weight load of the floor slab can be reduced, and the economic benefit is good; (2) the rough surface of the prefabricated plate can be eliminated, thereby reducing the production process of the prefabricated plate and improving the production efficiency; (3) the first welded steel bar frame and the second welded steel bar frame have been welded in advance in the factory, and there is no need to tie a large amount of steel bars on site, which greatly reduces the workload on the construction site and improves the construction efficiency; (4) the first welded steel bar frame and the second welded steel bar frame can fully play their role under short-term working conditions and normal use conditions, and the total amount of steel bars used under the same conditions is less, and the construction cost is low; (5) the relative relationship between the first transverse steel bar 131 and the first longitudinal steel bar 132, and the second transverse steel bar 141 and the second longitudinal steel bar 142 can be flexibly adjusted to ensure that the force-bearing steel bars of the first composite plate 100 are on the outermost side, and the structure is more reasonable; similarly, the relative relationship between the first transverse steel bar 131 and the first longitudinal steel bar 132 and the second transverse steel bar 141 and the second longitudinal steel bar 142 can be flexibly adjusted to ensure that the force-bearing steel bars of the first composite plate 100 are on the outermost side, and the structure is more reasonable; The relative relationship between the third transverse steel bar 231 and the third longitudinal steel bar 232, and the fourth transverse steel bar 241 and the fourth longitudinal steel bar 242 is adjusted to ensure that the stress-bearing steel bars of the first composite plate 100 are at the outermost side, and the structure is more reasonable; (6) the second steel mesh 140 and the fourth steel mesh 240 are indented inward for a certain distance to provide installation space for the first stress-bearing steel bar assembly 300 and the second stress-bearing steel bar assembly 800, so it can be applied to various supports 700, such as: side supports, intermediate supports, supports for lowering plates or raising elevations, and single composite plates and multiple spliced ​​composite plates within the range of the support 700; (7) the use of a whole piece of stress-bearing steel bar assembly and a whole piece of connecting steel mesh has high construction efficiency and improves the steel bar lap performance; (8) the end hook structure of the first stress-bearing steel bar assembly 300 and the second stress-bearing steel bar assembly 800 or other mechanical anchoring ends can reduce the lap length of the steel bars; (9) the use of a close-seam splicing structure has sufficient bearing capacity and will not deform or crack.

[0064] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A spliced ​​composite plate structure, characterized in that: It comprises a first laminated plate and a second laminated plate spliced ​​with the first laminated plate, The first composite plate comprises a first prefabricated plate, a first cast-in-place composite layer, and a first welded steel bar frame for connecting the first prefabricated plate and the first cast-in-place composite layer, the first welded steel bar frame comprises a first steel mesh, a second steel mesh, and a first connecting steel bar, the first steel mesh is located in the first prefabricated plate, the second steel mesh is located in the first cast-in-place composite layer, one end of the first connecting steel bar is welded to the first steel mesh, the other end of the first connecting steel bar is welded to the second steel mesh, and an end of the second steel mesh is indented inwardly relative to an end of the first prefabricated plate, The second composite plate comprises a second precast plate, a second cast-in-place composite layer, and a second welded steel bar frame for connecting the second precast plate and the second cast-in-place composite layer, the second welded steel bar frame comprises a third steel mesh, a fourth steel mesh, and a second connecting steel bar, the third steel mesh is located in the second precast plate, the fourth steel mesh is located in the second cast-in-place composite layer, one end of the second connecting steel bar is welded to the third steel mesh, the other end of the second connecting steel bar is welded to the fourth steel mesh, and an end of the fourth steel mesh is indented inwardly relative to an end of the second precast plate, A first stress-bearing steel bar assembly is provided between the first composite plate and the second composite plate, one end of the first stress-bearing steel bar assembly is connected to the second steel mesh, the other end of the first stress-bearing steel bar assembly is connected to the fourth steel mesh, the first precast plate and the second precast plate are abutted, and the first cast-in-place composite layer and the second cast-in-place composite layer are cast as one body; Both ends of the first stressed steel bar assembly are mechanical anchoring ends bent downward; A first connecting steel mesh is provided between the first composite plate and the second composite plate, one end of the first connecting steel mesh is located on the top surface of the first prefabricated plate, and the other end of the first connecting steel mesh is located on the top surface of the second prefabricated plate.

2. The spliced ​​composite plate structure according to claim 1, characterized in that: A first cutout arranged downwardly slanting is provided on the top edge of the first prefabricated board, and a second cutout arranged downwardly slanting is provided on the top edge of the second prefabricated board. The first cutout and the second cutout are arranged opposite to each other to form a first connecting groove.

3. The spliced ​​composite plate structure according to claim 1, characterized in that: The bottom edge of the first prefabricated plate is provided with a first notch which is recessed upwards, and the bottom edge of the second prefabricated plate is provided with a second notch which is recessed upwards. The first notch and the second notch are arranged opposite to each other to form a second connecting groove, and an elastic mesh cloth is arranged in the second connecting groove.

4. The spliced ​​composite plate structure according to claim 1, characterized in that: The first steel mesh includes a first transverse steel bar and a first longitudinal steel bar intersecting with the first transverse steel bar, the first transverse steel bar and the first longitudinal steel bar are welded together, the second steel mesh includes a second transverse steel bar and a second longitudinal steel bar intersecting with the second transverse steel bar, the second transverse steel bar and the second longitudinal steel bar are welded together, one end of the first connecting steel bar is welded together with the intersection point between the first transverse steel bar and the first longitudinal steel bar, and the other end of the first connecting steel bar is welded together with the intersection point between the second transverse steel bar and the second longitudinal steel bar, The third steel mesh includes third transverse steel bars and third longitudinal steel bars intersecting with the third transverse steel bars, and the third transverse steel bars and the third longitudinal steel bars are welded and connected. The fourth steel mesh includes fourth transverse steel bars and fourth longitudinal steel bars intersecting with the fourth transverse steel bars, and the fourth transverse steel bars and the fourth longitudinal steel bars are welded and connected. One end of the second connecting steel bar is welded and connected to the intersection between the third transverse steel bar and the third longitudinal steel bar, and the other end of the second connecting steel bar is welded and connected to the intersection between the fourth transverse steel bar and the fourth longitudinal steel bar.

5. The spliced ​​composite plate structure according to any one of claims 1 to 4, characterized in that: It also includes a support for fixing the first superimposed plate, wherein the first superimposed plate is arranged on one side of the support, and the support includes a support steel bar frame and a support body, wherein the support steel bar frame is arranged in the support body, A second stress-bearing steel bar assembly is provided between the support and the first composite plate, one end of the second stress-bearing steel bar assembly extends into the support body, the other end of the second stress-bearing steel bar assembly is connected to the second steel mesh, and the support body and the first cast-in-place composite layer are cast as one.

6. The spliced ​​composite plate structure according to claim 5, characterized in that: A second connecting steel mesh is provided between the support and the first composite plate, one end of the second connecting steel mesh is located on the top surface of the first prefabricated plate, and the second connecting steel mesh extends into the support body.

7. The spliced ​​composite plate structure according to claim 6, characterized in that: One end of the second stressed steel bar assembly extending into the support body is a first connecting end extending toward the other side of the support body, and the first connecting end is connected to the second steel mesh of another first composite plate.

8. The spliced ​​composite plate structure according to claim 7, characterized in that: One end of the second connecting steel mesh extending into the support body is a second connecting end extending toward the other side of the support body, and the second connecting end is located on the top surface of the first prefabricated plate of another first composite plate.

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