Bidirectional laminated slab side abutted seam structure

Abstract

The utility model relates to the technical field of laminated slab side abutted seams, in particular to a bidirectional laminated slab side abutted seam structure. The plate side abutted seam structure of the two-way laminated plate comprises a bottom plate, abutted seam connecting steel bars, laminated layer steel bars and a post-pouring concrete laminated layer, the adjacent bottom plates form a continuous splicing structure through plate side splicing seams, and post-cast strips are reserved at the 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 structure integrity is higher, construction is easier, the problem that water leakage possibly exists when the two-way laminated slabs are stacked is solved, and the using function and the living experience of a building are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of composite panel side splicing technology, specifically to a two-way 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. Reinforced concrete composite slabs (60mm thick base slabs) are a widely used prefabricated component due to their excellent 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. Two-way composite slabs exhibit bidirectional stress, effectively bearing loads in both orthogonal directions. Due to their stress characteristics, during production, the reinforcing bars in both directions are typically extended to ensure bidirectional load-bearing capacity in actual use. While this production method is more complex than that of one-way composite slabs, it also results in more stable overall structural performance.

[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 two-way composite slabs, the connection methods between the slab sides are more diverse than those for one-way composite slabs because the reinforcing bars in both directions usually extend outwards. A common method is to set a post-cast strip and use the extended reinforcing bars for connection. Despite the variety of connection methods, long-term exposure to complex open-air environments can lead to potential leakage at the connection points. In large areas like sky gardens and open terraces, the numerous joints on the slab sides mean that leakage can severely impact the building's functionality and living experience.

[0004] Therefore, there is an urgent need to develop a two-way composite slab 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 bidirectional laminated slabs to solve the problem of leakage at the side joints of bidirectional laminated slabs.

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

[0007] A two-way composite slab side joint structure includes:

[0008] At least two adjacent bidirectional composite slab bottom plates, each bottom plate including a steel truss, a first bottom plate reinforcement parallel to the steel truss and a second bottom plate reinforcement perpendicular to the steel truss, the first bottom plate reinforcement is set below the second bottom plate reinforcement, the adjacent bottom plates form a continuous splicing structure through the slab side splicing joint, and a post-pouring strip is reserved at the splicing joint;

[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] The bottom reinforcement bars at the joint are arranged parallel to the direction of the steel truss within the post-cast strip and located below the second bottom slab reinforcement bars;

[0011] The composite reinforcement includes a first composite reinforcement parallel to the steel truss and a second composite reinforcement perpendicular to the steel truss, wherein the first composite reinforcement is disposed above the second composite reinforcement.

[0012] The post-cast concrete composite layer densely fills the upper surface of the adjacent base slab and the post-cast strip, and forms an integral structure that works in synergy with the base slab by covering the joint connecting steel bars, the bottom steel bars of the joint slab, and the 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 100 mm.

[0015] Furthermore, the surface roughness of the interface between the base plate and the composite layer 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 of the interface between the base plate and the post-cast strip is greater than or equal to 80%, and the depth of the rough surface is greater than or equal to 4 mm.

[0016] Furthermore, it also includes bottom reinforcement bars at the joint, which are arranged parallel to the direction of the steel truss within the post-cast strip and located below the second bottom slab reinforcement bars.

[0017] Furthermore, the base plate has chamfers around its perimeter, and the chamfers are filled with mortar.

[0018] 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.

[0019] Furthermore, the second bottom plate reinforcement extends out of the bottom plate and is located within the post-cast strip, and its end can be connected by a 135° hook, a 90° hook, or a straight lap joint.

[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 as follows: The thickness of the post-cast concrete composite layer is greater than or equal to 100mm. The splice-connecting reinforcing bars are set along the entire length, covering the full transverse width of the adjacent base slab after splicing. This facilitates control of concrete pouring quality during construction, reducing problems such as insufficient concrete compaction that can occur when the post-cast concrete composite layer is thin. It improves the connection performance between the base slab and the post-cast portion of the two-way composite slab, allowing them to work together better and resulting in stronger overall structural integrity; it enhances the load-bearing capacity of the two-way composite slab; and it increases the stiffness of the two-way composite slab, reducing problems such as cracks caused by excessive deformation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the side joint structure of the bidirectional composite plate described in Embodiment 1 of this utility model;

[0025] Figure 2 This is a front view of the side joint structure of the bidirectional composite plate according to Embodiment 1 of this utility model;

[0026] Figure 3 This is a side view of the bidirectional laminated plate side joint structure described in Embodiment 1 of this utility model;

[0027] Figure 4 This is a perspective view of the side joint structure of the bidirectional laminated plate described in Embodiment 1 of this utility model;

[0028] Figure 5 This is a schematic diagram of the bidirectional laminated plate structure described in Embodiment 1 of this utility model;

[0029] Figure 6 This is a schematic diagram of the steel truss structure described in Embodiment 1 of this utility model;

[0030] Figure 7 This is a schematic diagram of the bidirectional composite plate side splicing support structure described in Embodiment 3 of this utility model;

[0031] Figure 8 This is a front view of the bidirectional composite plate side support structure described in Embodiment 3 of this utility model;

[0032] Figure 9 This is a side view of the bidirectional composite plate side support structure described in Embodiment 3 of this utility model;

[0033] Figure 10 This is a perspective view of the bidirectional composite plate side support structure described in Embodiment 3 of this utility model;

[0034] Figure 11This is a schematic diagram of the bidirectional composite plate structure described in Embodiments 2 and 4 of this utility model.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Base slab; 2-1. First composite layer reinforcement; 2-2. Second composite layer reinforcement; 3. Composite beam; 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. Fiber bundle. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Example 1

[0041] A two-way composite slab side joint structure includes: a bottom slab 1, joint connecting steel bars 4, joint bottom steel bars at the joint, composite layer steel bars 2-1 and 2-2, and a post-cast concrete composite layer 8. The bottom slab 1 has chamfers 6 around its perimeter, and the chamfers 6 are filled with mortar.

[0042] Adjacent base slabs 1 form a continuous splicing structure through side splicing joints, with a pre-cast strip reserved at the splicing joints; each base slab 1 includes a steel truss 5, and the base slab 1 is provided with a first base slab steel bar 7-1 parallel to the steel truss 5 and a second base slab steel bar 7-2 perpendicular to the steel truss 5, with the first base slab steel bar 7-1 located below the second base slab steel bar 7-2; the steel truss 5 includes an upper chord steel bar 5-1, a lower chord steel bar 5-2 and web steel bars 5-3, with its upper part extending out of the base slab 1;

[0043] The splice connecting steel bar 4 runs continuously through all the splice joints of the adjacent bottom plate 1 in a direction perpendicular to the steel truss 5. Its length direction covers the full transverse width of the adjacent bottom plate 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.

[0044] The bottom reinforcement bars of the joint slab are arranged parallel to the direction of the steel truss 5 in the post-cast strip and located below the second bottom slab reinforcement bars 7-2;

[0045] 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 on the second composite reinforcement 2-2.

[0046] 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 adjacent bottom slab 1 and the post-cast strip. It forms an integral structure that works together with the bottom slab 1 to bear the load by covering the joint connecting steel bar 4, the bottom steel bar of the joint slab and the composite layer steel bars 2-1 and 2-2.

[0047] Specifically, the ends of the second bottom plate reinforcement 7-2 can be connected by a 135° hook, a 90° hook, or a straight lap splice.

[0048] The post-cast strip should be placed in the part with less stress. The width of the post-cast strip and the anchorage length of the second bottom plate reinforcement 7-2 extending out of the two-way composite slab bottom plate 1 in the post-cast strip are related to the diameter of the second bottom plate reinforcement 7-2. The specific length shall be determined by the designer according to the design requirements.

[0049] In a preferred embodiment, the surface roughness 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 of the interface between the base plate 1 and the post-cast strip 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 no 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] In this embodiment, the thickness of the post-cast concrete composite layer 8 is greater than or equal to 100mm. A continuous longitudinal reinforcement bar 4 is also installed at the joint, its length covering the entire transverse width of the adjacent base slab 1 after splicing. This solves the problem of potential water leakage at the joints of the two-way composite slabs used in the sky gardens and open terraces of fourth-generation residential buildings, ensuring the building's functionality and living experience.

[0052] Load-bearing performance: It can improve the connection performance between the bottom slab 1 of the two-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 load-bearing capacity of the two-way composite slab; it can improve the stiffness of the two-way composite slab and reduce problems such as cracks caused by excessive deformation. Construction: It is easier to control the concrete pouring quality during construction and reduce problems such as insufficient concrete compaction when the thickness of the post-cast concrete composite layer 8 is relatively thin.

[0053] Example 2

[0054] The only difference between this embodiment and Embodiment 1 is that a pre-embedded flexible fiber bundle 9 is set at the contact surface between the precast layer and the cast-in-place layer at the joint.

[0055] In this embodiment, polypropylene fiber bundles 9 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 the fiber bundles is wrapped with a 1-2 mm thick water-swellable elastic adhesive strip. The perpendicular and intersecting arrangement of the fiber bundles 9 and the joint connecting steel bars 4 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 9 to inhibit interlayer slippage, which can further improve the seepage prevention capability.

[0056] Example 3

[0057] A two-way composite slab side support structure includes: a composite beam 3, a bottom plate 1, joint connecting steel bars 4, composite layer steel bars 2-1 and 2-2, and 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.

[0058] Two adjacent bottom plates 1 are placed on both sides of the composite beam 3, parallel to the direction of the steel truss 5. The second bottom plate steel bar 7-2 extends into the support structure and is anchored to the composite beam 3 to form a plate side support structure.

[0059] 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.

[0060] The splice connecting steel bar 4 runs continuously through all the splice joints of the adjacent bottom plate 1 in a direction perpendicular to the steel truss 5. Its length direction covers the full transverse width of the adjacent bottom plate 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.

[0061] 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 on the second composite reinforcement 2-2.

[0062] 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 adjacent bottom slab 1, the splice joint and the upper surface of the composite beam 3. It forms an integral structure that works together with the bottom slab 1 and the composite beam 3 by covering the splice joint connecting steel bars 4 and the composite layer steel bars 2-1 and 2-2.

[0063] 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.

[0064] The roughness area of ​​the interface between the composite beam 3 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 6mm. The composite beam 3 is a cast-in-place beam, a precast wall, or a cast-in-place wall.

[0065] 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 no 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.

[0066] In summary: the thickness of the post-cast concrete composite layer 8 is greater than or equal to 100mm. The joint connecting steel bars 4 are installed along the entire length, covering the full transverse width of the adjacent base slab 1 after splicing. This solves the problem of potential water leakage at the joints of the two-way composite slabs used in the sky gardens and open terraces of fourth-generation residential buildings, ensuring the building's functionality and living experience.

[0067] 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 two-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.

[0068] Construction: The quality of concrete pouring is easy to control during construction, reducing problems such as insufficient concrete density when the thickness of the post-poured concrete composite layer is too thin.

[0069] Example 4

[0070] The only difference between this embodiment and embodiment 3 is that a pre-embedded flexible fiber bundle 9 is set at the contact surface between the precast layer and the cast-in-place layer at the joint.

[0071] In this embodiment, polypropylene fiber bundles 9 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 the fiber bundles is wrapped with a 1-2 mm thick water-swellable elastic adhesive strip. The perpendicular and intersecting arrangement of the fiber bundles 9 and the joint connecting steel bars 4 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 9 to inhibit interlayer slippage, which can further improve the seepage prevention capability.

[0072] 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 technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A two-way composite slab side joint structure, characterized in that, include: At least two adjacent bidirectional composite slab bottom plates, each bottom plate including a steel truss, a first bottom plate reinforcement parallel to the steel truss and a second bottom plate reinforcement perpendicular to the steel truss, the first bottom plate reinforcement is set below the second bottom plate reinforcement, the adjacent bottom plates form a continuous splicing structure through the slab side splicing joint, and a post-pouring strip is reserved at the splicing joint; 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. The composite reinforcement includes a first composite reinforcement parallel to the steel truss and a second composite reinforcement perpendicular to the steel truss, wherein the first composite reinforcement is disposed above the second composite reinforcement. The post-cast concrete composite layer densely fills the upper surface of the adjacent base slab and the post-cast strip, and forms an integral structure that works in synergy with the base slab by covering the joint connecting steel bars, the bottom steel bars of the joint slab, and the composite layer steel bars.

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

3. The side joint structure of the bidirectional laminated plate according to claim 2, characterized in that, The surface roughness of the interface between the base plate and the composite layer 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 of the interface between the base plate and the post-cast strip is greater than or equal to 80%, and the depth of the rough surface is greater than or equal to 4 mm.

4. The side joint structure of the bidirectional laminated plate according to claim 2, characterized in that, It also includes the bottom reinforcement bars at the joint, which are arranged parallel to the direction of the steel truss in the post-cast strip and located below the second bottom slab reinforcement bars.

5. The side joint structure of the bidirectional laminated plate according to claim 1, characterized in that, The base plate has chamfers around its perimeter, and the chamfers are filled with mortar.

6. The side joint structure of the bidirectional laminated slab according to claim 1, 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 side joint structure of the bidirectional laminated slab according to claim 1, characterized in that, The second bottom plate reinforcement extends out of the bottom plate and is located within the post-cast strip. Its end can be connected by a 135° hook, a 90° hook, or a straight lap joint.

8. The side joint structure of the bidirectional laminated slab 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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