Plate side abutted seam structure of one-way laminated plate

Abstract

The utility model relates to the technical field of laminated slab side abutted seams, in particular to a one-way laminated slab side abutted seam structure. A one-way laminated slab side abutted seam structure comprises a one-way laminated slab bottom plate, abutted seam connecting steel bars, additional full-length constructional steel bars and laminated layer steel bars from bottom to top, and further comprises a post-poured concrete laminated layer. The adjacent bottom plates form a continuous splicing structure through the plate side splicing seams; the bottom plates comprise steel bar trusses, the splicing seam connecting steel bars continuously penetrate through splicing seams of all the adjacent bottom plates in the direction perpendicular to the steel bar trusses, the length direction of the splicing seam connecting steel bars covers the transverse full width after the adjacent bottom plates are spliced, and the two ends of the splicing seam connecting steel bars extend to the outer side edge of the bottom plate on the outermost side. The utility model has the advantages that the structural integrity is stronger, the construction is simpler, the problem of water leakage possibly existing during one-way lamination of slabs is solved, and the use function and the living experience of a building are ensured.

Description

Technical Field

[0001] This utility model relates to the field of composite panel side splicing technology, specifically to a unidirectional composite panel side splicing structure. Background Technology

[0002] Traditional cast-in-place construction suffers from resource waste and severe pollution, hindering the transformation towards industrialized construction. my country has proposed a development goal for prefabricated buildings, requiring that prefabricated components account for over 30% of new construction. Reinforced concrete composite slabs (60mm thick base slabs) are widely used prefabricated components due to their good mechanical properties, ease of construction, low cost, high quality, and energy efficiency. Like cast-in-place slabs, composite slabs can be divided into one-way and two-way composite slabs. One-way composite slabs experience stress in a single direction; therefore, during production, typically only the main reinforcing bars extend, while the distribution bars remain closed, resulting in higher production efficiency. This also makes transportation and installation relatively easier.

[0003] The "fourth-generation housing" incorporates large-scale sky gardens and open terraces. To meet the requirements of prefabricated construction, the floor slabs in these areas also need to use prefabricated components. When using unidirectional composite slabs, to fully utilize the advantages of prefabrication, the connections between the unidirectional composite slabs on the sides are often tight-fitting, meaning the slabs are pressed firmly against each other on the sides and connected by reinforcing steel bars on the bottom slab, rather than by a post-cast strip. Therefore, the seams on the sides of the unidirectional composite slabs may leak. In large areas like sky gardens and open terraces, there are many seams on the sides, and once leakage occurs, it seriously affects the building's functionality and the living experience.

[0004] Therefore, there is an urgent need to develop a unidirectional composite panel side joint structure to solve the above problems. Utility Model Content

[0005] This utility model addresses the technical problems existing in the prior art by providing a side joint structure for unidirectional laminated panels to solve the problem of leakage at the side joints of unidirectional laminated panels.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A unidirectional laminated slab side joint structure, comprising, from bottom to top:

[0008] At least two adjacent unidirectional composite slab base plates, the adjacent base plates forming a continuous splicing structure through side splicing joints; each base plate includes a steel truss, the steel truss including top chord steel bars, bottom chord steel bars and web steel bars, the upper part of which extends out of the base plate;

[0009] The splice connecting steel bars are perpendicular to the direction of the steel truss and continuously penetrate all the splice joints of the adjacent bottom plates. Their length direction covers the full transverse width of the adjacent bottom plates after splicing, and both ends extend to the outer edge of the outermost bottom plate.

[0010] Additional continuous structural steel bars are arranged parallel to the direction of the steel truss, located on the side of the bottom plate near the splice joint, and stacked on the upper surface of the splice connecting steel bars;

[0011] Composite reinforcement;

[0012] It also includes a post-cast concrete composite layer, which densely fills the upper surface and joints of the adjacent base slab, and forms an integral structure that works in tandem with the base slab by covering the joint connecting steel bars, adding continuous structural steel bars and composite layer steel bars.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, the thickness of the post-cast concrete composite layer is greater than or equal to 100mm.

[0015] Furthermore, the surface roughness area of ​​the bonding surface between the base plate and the laminate is greater than or equal to 80%, and the depth of the rough surface is greater than or equal to 4 mm.

[0016] Furthermore, the bottom plate of the unidirectional composite slab has chamfers around its perimeter, and the chamfers are filled with mortar.

[0017] Furthermore, the cross-sectional area of ​​the joint connecting steel bars is greater than or equal to the cross-sectional area of ​​the second bottom slab steel bars.

[0018] Furthermore, the composite reinforcement includes a first composite reinforcement parallel to the steel truss and a second composite reinforcement perpendicular to the steel truss, with the first composite reinforcement disposed above the second composite reinforcement.

[0019] Furthermore, each base plate contains a first base plate reinforcement parallel to the steel truss and a second base plate reinforcement perpendicular to the steel truss, with the first base plate reinforcement located below the second base plate reinforcement.

[0020] Furthermore, the steel truss includes upper chord steel bars, lower chord steel bars, and web steel bars, with its upper part extending out of the bottom plate.

[0021] Furthermore, polypropylene fiber bundles with a diameter of 3-5mm are pre-embedded along the longitudinal direction of the joint on the side of the base plate, and the fiber bundles are arranged perpendicularly to the joint connecting steel bars.

[0022] Furthermore, the surface of the fiber bundle is wrapped with a 1-2 mm thick elastic rubber strip that expands when exposed to water.

[0023] The beneficial effects of this utility model are:

[0024] This utility model relates to a composite slab with a post-cast concrete composite layer thickness greater than or equal to 100mm. The joint connecting reinforcement is continuous in length, covering the entire transverse width of the adjacent bottom slab after splicing, and extending to the outermost edge of the outermost bottom slab at both ends. This continuous joint connecting reinforcement reduces the need for placing joint connecting reinforcement at each unidirectional composite slab side joint, simplifying the construction process. It also facilitates control over concrete pouring quality during construction, reducing problems such as insufficient concrete compaction caused by a thin post-cast concrete composite layer. Furthermore, it improves the connection performance between the unidirectional composite slab bottom slab and the post-cast portion, allowing them to work together better and resulting in stronger overall structural integrity. Finally, it increases the rigidity of the composite slab, reducing cracks caused by excessive deformation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the side joint structure of the unidirectional laminated plate described in Embodiment 1 of this utility model;

[0026] Figure 2 This is a front view of the side joint structure of the unidirectional laminated plate described in Embodiment 1 of this utility model;

[0027] Figure 3 This is a side view of the unidirectional laminated plate side joint structure described in Embodiment 1 of this utility model;

[0028] Figure 4 This is a perspective view of the side joint structure of the unidirectional laminated plate described in Embodiment 1 of this utility model;

[0029] Figure 5 This is a schematic diagram of the unidirectional laminated plate structure described in Embodiment 1 of this utility model;

[0030] Figure 6 This is a schematic diagram of the steel truss structure described in Embodiment 1 of this utility model;

[0031] Figure 7 This is a schematic diagram of the unidirectional composite plate side splicing support structure described in Embodiment 3 of this utility model;

[0032] Figure 8 This is a front view of the unidirectional composite plate side support structure described in Embodiment 3 of this utility model;

[0033] Figure 9 This is a side view of the unidirectional composite plate side support structure described in Embodiment 3 of this utility model;

[0034] Figure 10 This is a perspective view of the unidirectional composite plate side support structure described in Embodiment 3 of this utility model;

[0035] Figure 11This is a schematic diagram of the unidirectional laminated plate structure described in Embodiments 2 and 4 of this utility model.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1. Base slab; 2-1. First composite layer reinforcement; 2-2. Second composite layer reinforcement; 3. Additional continuous structural reinforcement; 4. Joint connection reinforcement; 5. Steel truss; 5-1. Top chord reinforcement; 5-2. Bottom chord reinforcement; 5-3. Web reinforcement; 6. Chamfer; 7-1. First base slab reinforcement; 7-2. First base slab reinforcement; 8. Post-cast concrete composite layer; 9. Composite beam; 10. Fiber bundle. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0041] Example 1

[0042] A unidirectional composite slab side joint structure includes a unidirectional composite slab bottom plate 1 from bottom to top, joint connecting steel bars 4, additional continuous structural steel bars 3, and composite layer steel bars 2-1 and 2-2, and also includes a post-cast concrete composite layer 8. The bottom plate 1 has chamfers 6 around its perimeter, and the chamfers 6 are filled with mortar.

[0043] Adjacent unidirectional composite slab bottom plates 1 form a splicing structure through side splicing joints; each bottom plate 1 includes a steel truss 5, and the bottom plate 1 is provided with a first bottom plate steel bar 7-1 parallel to the steel truss 5 and a second bottom plate steel bar 7-2 perpendicular to the steel truss 5, and the first bottom plate steel bar 7-1 is located below the second bottom plate steel bar 7-2; the steel truss 5 includes an upper chord steel bar 5-1, a lower chord steel bar 5-2 and a web steel bar 5-3, the upper part of which extends out of the bottom plate 1;

[0044] The splice connecting steel bar 4 is perpendicular to the direction of the steel truss 5 and continuously penetrates all the splice joints of the adjacent bottom plates 1. Its length direction covers the full transverse width of the adjacent bottom plates 1 after splicing, and both ends extend to the outer edge of the outermost bottom plate 1. Its cross-sectional area is determined by the designer according to the design requirements and must be greater than or equal to the cross-sectional area of ​​the second bottom plate steel bar 7-2.

[0045] The additional continuous structural steel bar 3 is arranged parallel to the direction of the steel truss 5, located on the side of the bottom plate 1 near the splice joint, and stacked on the upper surface of the splice connecting steel bar 4;

[0046] The composite reinforcement 2-1 and 2-2 include a first composite reinforcement 2-1 parallel to the steel truss 5 and a second composite reinforcement 2-2 perpendicular to the steel truss 5, and the first composite reinforcement 2-1 is disposed above the second composite reinforcement 2-2.

[0047] The thickness of the post-cast concrete composite layer 8 is greater than or equal to 100mm. It is densely filled to the upper surface of the two base plates 1 and the splice joint. It forms an integral structure that works together with the two base plates 1 to bear the load by covering the splice joint connecting steel bar 4, the additional continuous structural steel bar 3 and the composite layer steel bars 2-1 and 2-2.

[0048] The additional continuous structural reinforcement 3, the first composite layer reinforcement 2-1, the second composite layer reinforcement 2-2, the first bottom slab reinforcement 7-1, and the second bottom slab reinforcement 7-2 are determined by the designer according to the design requirements.

[0049] In a preferred embodiment, the surface roughness area of ​​the bonding surface between the base plate 1 and the post-cast concrete composite layer 8 is greater than or equal to 80%, and the depth of the rough surface is greater than or equal to 4 mm.

[0050] This embodiment is used for rooftop gardens and open terraces where the ratio of the long side to the short side of the floor slab is not greater than or equal to 3. The splice connecting steel bars 4 are installed along the entire length of the rooftop garden and open terrace areas, and are suitable for fourth-generation residences.

[0051] The construction method of this embodiment is to set up the unidirectional composite slab base plate 1, the joint connecting steel bars 4, the additional continuous structural steel bars 3, and the composite layer steel bars 2-1 and 2-2 in sequence from bottom to top; after the composite layer steel bars 2-1 and 2-2 are tied and the formwork is erected, concrete is poured to form the post-cast concrete composite layer 8.

[0052] In this embodiment, the thickness of the post-cast concrete composite layer 8 is greater than or equal to 100mm, and the joint connecting steel bars 4 are set along the entire length, covering the full transverse width of the adjacent bottom slab 1 after splicing. This solves the problem of water leakage that may occur at the joints of the unidirectional composite slabs when using unidirectional composite slabs for the sky gardens and open terraces of fourth-generation residential buildings, ensuring the building's functionality and living experience.

[0053] Structural performance: It can improve the load-bearing capacity of the composite slab; it can improve the connection performance between the bottom plate 1 of the one-way composite slab and the post-cast part, so that the two can work together better and the overall structure is stronger; it can improve the stiffness of the composite slab and reduce problems such as cracks caused by excessive deformation.

[0054] Construction: The continuous setting of the joint connecting steel bar 4 can reduce the step of placing the joint connecting steel bar 4 at the joint of each unidirectional composite slab side, simplifying the construction process; it is easier to control the concrete pouring quality during construction, reducing problems such as insufficient concrete compaction when the thickness of the post-poured concrete composite layer 8 is relatively thin.

[0055] Example 2 differs from Example 1 only in that a pre-embedded flexible fiber bundle 10 is provided at the contact surface between the precast layer and the cast-in-place layer at the joint.

[0056] In this embodiment, polypropylene fiber bundles 10 with a diameter of 3-5 mm are pre-embedded along the longitudinal direction of the joint on the side of the base plate 1. These bundles are arranged perpendicularly to the connecting steel bars 4 at the joint, and their surfaces are covered with a 1-2 mm thick water-swellable elastic adhesive strip. The perpendicular arrangement of the fiber bundles 10 and the connecting steel bars 4 at the joint forms a grid-like shear-resistant system. After the concrete is poured, the adhesive strip expands and fills the micro-cracks at the interface, working together with the fiber bundles 10 to inhibit interlayer slippage, which can further improve the seepage prevention capability.

[0057] Example 3

[0058] A unidirectional composite slab side support structure includes a unidirectional composite slab bottom plate 1 from bottom to top, joint connecting steel bars 4, additional continuous structural steel bars 3, and composite layer steel bars 2-1 and 2-2, and also includes a post-cast concrete composite layer 8. The bottom plate 1 has chamfers 6 around its perimeter, and the chamfers 6 are filled with mortar.

[0059] The two adjacent bottom plates 1 are placed on both sides of the composite beam 9 parallel to the direction of the steel truss 5, and the adjacent one-way composite plate bottom plates 1 and the composite beam 9 form a plate side support structure.

[0060] Each base plate 1 includes a steel truss 5. The base plate 1 is provided with a first base plate steel bar 7-1 parallel to the steel truss 5 and a second base plate steel bar 7-2 perpendicular to the steel truss 5, and the first base plate steel bar 7-1 is located below the second base plate steel bar 7-2. The steel truss 5 includes an upper chord steel bar 5-1, a lower chord steel bar 5-2 and a web steel bar 5-3, the upper part of which extends out of the base plate 1.

[0061] The splice connecting steel bar 4 is perpendicular to the direction of the steel truss 5 and continuously penetrates all the splice joints of the adjacent bottom plates 1. Its length direction covers the full transverse width of the adjacent bottom plates 1 after splicing, and both ends extend to the outer edge of the outermost bottom plate 1. Its cross-sectional area is determined by the designer according to the design requirements and must be greater than or equal to the cross-sectional area of ​​the second bottom plate steel bar 7-2.

[0062] Additional continuous structural steel bars 3 are arranged parallel to the direction of the steel truss 5 and extend continuously along the area directly above the splice joint, and are superimposed on the upper surface of the splice connecting steel bars 4;

[0063] The composite reinforcement 2-1 and 2-2 include a first composite reinforcement 2-1 parallel to the steel truss 5 and a second composite reinforcement 2-2 perpendicular to the steel truss 5, and the first composite reinforcement 2-1 is disposed above the second composite reinforcement 2-2;

[0064] The thickness of the post-cast concrete composite layer 8 is greater than or equal to 100mm. It is densely filled to the upper surface of the two base plates 1, the splice joint and the upper surface of the composite beam 9. It forms an integral structure that works together with the composite beam 9 and the two base plates 1 to bear the load by covering the splice joint connecting steel bars 4, the additional continuous structural steel bars 3 and the composite layer steel bars 2-1 and 2-2.

[0065] The additional continuous structural reinforcement 3, the first composite layer reinforcement 2-1, the second composite layer reinforcement 2-2, the first bottom slab reinforcement 7-1, and the second bottom slab reinforcement 7-2 are determined by the designer according to the design requirements.

[0066] In a preferred embodiment, the surface roughness area of ​​the interface between the base plate 1 and the post-cast concrete composite layer 8 is greater than or equal to 80%, and the depth of the rough surface is greater than or equal to 4 mm; the surface roughness area of ​​the interface between the composite beam 9 and the post-cast concrete composite layer 8 is greater than or equal to 80%, and the depth of the rough surface is greater than or equal to 6 mm; the composite beam 9 is a cast-in-place beam, a precast wall, or a cast-in-place wall.

[0067] This embodiment is used for rooftop gardens and open terraces where the ratio of the long side to the short side of the floor slab is not greater than or equal to 3. The splice connecting steel bars 4 are installed along the entire length of the rooftop garden and open terrace areas, and are suitable for fourth-generation residences.

[0068] The construction method of this embodiment is to set up the composite beam 9, the one-way composite slab bottom plate 1, the joint connecting steel bar 4, the additional continuous structural steel bar 3, and the composite layer steel bars 2-1 and 2-2 in sequence from bottom to top; after the composite layer steel bars 2-1 and 2-2 are tied and the formwork is erected, concrete is poured to form the post-cast concrete composite layer 8.

[0069] In this embodiment, the thickness of the post-cast concrete composite layer 8 of the composite slab is greater than or equal to 100mm. The joint connecting steel bars 4 are continuous, covering the entire transverse width of the adjacent base slab 1 after splicing, and extending to the outermost edge of the outermost base slab 1 at both ends. This solves the problem of potential water leakage at the side supports of unidirectional composite slabs when using them for sky gardens and open terraces in fourth-generation residential buildings, ensuring the building's functionality and living experience.

[0070] Stress performance: It can reduce stress concentration at the side supports of the slab; it can improve the connection performance between the bottom plate 1 of the one-way composite slab and the post-cast part, so that the two can work together better and the overall structure is stronger; it can reduce cracks at the side supports of the slab.

[0071] Construction: In addition to the connection between the unidirectional composite slab and the composite beam 9, the connection between the unidirectional composite slabs on the side is achieved by setting the joint connecting steel bars 4 on the bottom plate 1 of the unidirectional composite slab. The connection between the unidirectional composite slabs on the side is also achieved by setting the joint connecting steel bars 4 on the bottom plate 1 of the unidirectional composite slab. The joint connecting steel bars 4 are set along the entire length, which reduces the process of placing the joint connecting steel bars 4 at the joint of each unidirectional composite slab, thus simplifying the construction process. During the construction process, it is easier to control the quality of concrete pouring and reduce problems such as insufficient concrete compaction caused by the thinness of the post-poured concrete composite layer 8.

[0072] Example 4 differs from Example 3 only in that a pre-embedded flexible fiber bundle 10 is provided at the contact surface between the precast layer and the cast-in-place layer at the joint.

[0073] In this embodiment, polypropylene fiber bundles 10 with a diameter of 3-5 mm are pre-embedded along the longitudinal direction of the joint on the side of the base plate 1. These bundles are arranged perpendicularly and intersectingly with the joint connecting steel bars 4. The surface of each bundle is covered with a 1-2 mm thick water-swellable elastic adhesive strip. The fiber bundles 10 and the joint connecting steel bars 4 are arranged perpendicularly and intersectingly to form a grid-like shear-resistant system. After the concrete is poured, the adhesive strip expands and fills the micro-cracks at the interface, working together with the fiber bundles 10 to inhibit interlayer slippage and further improve the seepage prevention capability.

[0074] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the methods, systems, and devices described above are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A side joint structure for a unidirectional laminated slab, characterized in that, From bottom to top, including: At least two adjacent unidirectional composite slab base plates, each base plate including a steel truss, the adjacent base plates forming a continuous splicing structure through side splicing joints; The splice connecting steel bars are perpendicular to the direction of the steel truss and continuously penetrate all the splice joints of the adjacent bottom plates. Their length direction covers the full transverse width of the adjacent bottom plates after splicing, and both ends extend to the outer edge of the outermost bottom plate. Additional continuous structural steel bars are arranged parallel to the direction of the steel truss, located on the side of the bottom plate near the splice joint, and stacked on the upper surface of the splice connecting steel bars; Composite reinforcement; It also includes a post-cast concrete composite layer, which densely fills the upper surface and joints of the adjacent base slab, and forms an integral structure that works in tandem with the base slab by covering the joint connecting steel bars, adding continuous structural steel bars and composite layer steel bars.

2. The unidirectional laminated slab side joint structure according to claim 1, characterized in that, The thickness of the post-poured concrete composite layer is greater than or equal to 100mm.

3. The unidirectional laminated slab side joint structure according to claim 2, characterized in that, The surface roughness of the interface between the base plate and the laminate is greater than or equal to 80%, and the depth of the rough surface is greater than or equal to 4 mm.

4. The unidirectional laminated slab side joint structure according to claim 1, characterized in that, The bottom plate of the unidirectional composite slab has chamfers around its perimeter, and the chamfers are filled with mortar.

5. The unidirectional laminated slab side joint structure according to claim 1, characterized in that, The base plate contains a first base plate reinforcement parallel to the steel truss and a second base plate reinforcement perpendicular to the steel truss, with the first base plate reinforcement located below the second base plate reinforcement.

6. The unidirectional laminated slab side joint structure according to claim 5, characterized in that, The cross-sectional area of ​​the joint connecting steel bars is greater than or equal to the cross-sectional area of ​​the second bottom slab steel bars.

7. The unidirectional laminated slab side joint structure according to claim 1, characterized in that, The composite reinforcement includes a first composite reinforcement parallel to the steel truss and a second composite reinforcement perpendicular to the steel truss, with the first composite reinforcement positioned above the second composite reinforcement.

8. The side joint structure of the unidirectional laminated plate according to claim 1, characterized in that, The steel truss includes upper chord steel bars, lower chord steel bars, and web steel bars, with its upper part extending out of the bottom plate.

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