Construction structure at a support of a laminated slab

Abstract

This utility model relates to the field of composite slab construction technology, specifically to a construction structure at a composite slab support. It includes: a composite slab, disposed on one side of a structural beam and located at the bottom end of the structural slab; a sleeve, pre-embedded within the composite slab; and anchoring reinforcement bars inserted into the sleeve and extending into the structural beam. The structural beam is a cast-in-place beam, and the structural slab is a cast-in-place slab. In this application, the sleeve is pre-embedded during the fabrication of the composite slab, and the anchoring reinforcement bars are inserted into the sleeve and extend into the structural beam. During the casting of the structural beam, the anchoring reinforcement bars are anchored to the structural beam. During the casting of the structural slab, the sleeve can be sealed, fixing the sleeve and the anchoring reinforcement bars, and thus fixing the composite slab and the structural slab. The composite slab is anchored to the structural beam.

Description

Technical Field

[0001] This utility model relates to the field of composite slab construction technology, specifically to a construction structure at the support of a composite slab. Background Technology

[0002] The composite slabs utilize a combination of factory prefabrication and on-site assembly, employing modular hoisting to significantly improve installation efficiency by 40%. This approach also effectively reduces material waste and carbon emissions, demonstrating the advantages of green construction. However, in existing engineering projects, the installation of non-closely spaced composite slabs at structural beam supports has become a bottleneck restricting on-site progress. Because the construction process involves first tying the structural beam reinforcement at the supports and then hoisting the composite slabs, the protruding reinforcement bars of the composite slabs are difficult to anchor smoothly into the structural beams during installation, leading to frequent construction disruptions and delays. Utility Model Content

[0003] In view of this, the present invention provides a construction structure at the support of composite slabs to solve the problem that it is difficult to anchor the reinforcing bars of composite slabs into the structural beams during the construction of composite slabs.

[0004] This utility model provides a construction structure for a composite slab support, including:

[0005] Composite slab, located on one side of the structural beam and at the bottom end of the structural slab;

[0006] The sleeve penetrates and is pre-embedded in the composite slab;

[0007] Anchoring steel bars are inserted into the sleeve and extend into the structural beam;

[0008] The structural beams are cast-in-place beams, and the structural slabs are cast-in-place slabs.

[0009] In this application, a pre-embedded sleeve is used during the fabrication of the composite slab. Anchor reinforcement bars are inserted into the sleeve and extend into the structural beam. During the casting of the structural beam, the anchor reinforcement bars are anchored to the beam. During the casting of the structural slab, the sleeve is sealed to fix the sleeve and anchor reinforcement bars, thus fixing the composite slab and the structural slab. The composite slab is anchored to the structural beam.

[0010] In one alternative embodiment, the end face of the sleeve is flush with the surface of the laminate.

[0011] In this application, the end face of the sleeve is flush with the surface of the composite slab, which prevents interference with the reinforcing bars of the structural beams or slabs during hoisting of the composite slab. This reduces hoisting difficulty and increases installation efficiency.

[0012] In one alternative embodiment, the reinforcing bars of the structural beam are tied to the reinforcing bars of the structural slab. This allows the structural beam and the structural slab to be connected.

[0013] In one alternative embodiment, the reinforcing bars within the composite slab do not extend beyond the surface of the composite slab. This prevents interference with the reinforcing bars of structural beams or slabs during hoisting of the composite slab.

[0014] In one alternative embodiment, the angle between the sleeve and the composite plate is 40° to 50°.

[0015] In one alternative embodiment, the anchoring reinforcement includes a horizontal portion and an inclined portion, the horizontal portion being located on the top surface of the composite slab, and the inclined portion penetrating the sleeve and extending into the structural beam.

[0016] In this application, the inclined portion can be anchored to the structural beam during casting, and the horizontal portion can limit the composite slab to prevent it from moving away from the structural beam.

[0017] In one alternative embodiment, the diameter of the anchoring reinforcement is the same as the diameter of the reinforcement in the composite slab.

[0018] In one optional embodiment, the sleeve and anchoring steel bars are in multiple groups, and the spacing of each group of anchoring steel bars is the same as the spacing of the steel bars in the composite slab.

[0019] In one optional embodiment, the horizontal distance from which the anchoring rebar extends into the structural beam is not less than the greater of 15 times the diameter of the anchoring rebar and the distance from the vertical centerline of the structural beam to its edge. This ensures the anchoring strength between the anchoring rebar and the structural beam. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the existing composite slab construction structure.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Composite slab; 2. Structural beam; 3. Structural slab; 4. Sleeve; 5. Anchoring reinforcement. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The composite slabs utilize a combination of factory prefabrication and on-site assembly, employing modular hoisting to significantly improve installation efficiency by 40%. This approach also effectively reduces material waste and carbon emissions, demonstrating excellent advantages in green construction. However, in actual engineering projects, the installation of non-closely spaced composite slabs at structural beam supports has become a bottleneck restricting on-site progress. For example... Figure 2 As shown, the construction process involves first tying the structural beam reinforcement at the supports and then hoisting the composite slab. The protruding reinforcement bars of the composite slab are difficult to anchor smoothly into the structural beams during installation, leading to frequent construction delays and schedule postponements. Innovating and optimizing the construction method of the composite slab support reinforcement is not only a technical requirement to overcome construction bottlenecks but also a key path to promote the in-depth development of building industrialization. By developing prefabricated reinforcement anchoring nodes that can be quickly positioned and using prefabricated reinforcement connection modules, we can achieve standardization and automation of component installation, reduce on-site manual intervention, and avoid resource waste caused by construction delays. This can inject new momentum into the coordinated development of building industrialization and green building.

[0027] Composite slabs, employing a construction method combining prefabrication and assembly, offer significant advantages such as high installation efficiency and low material waste. However, in actual construction, the installation of non-closely assembled composite slabs at structural beam supports presents serious technical obstacles. Because the structural beam reinforcement at the support must be tied first, followed by the hoisting of the composite slab, the protruding reinforcement of the composite slab often struggles to be smoothly anchored into the structural beam, necessitating repeated adjustments and corrections during installation. This not only significantly slows down the construction progress and increases project costs but also requires substantial manpower, leading to increased labor costs. The composite slab reinforcement installation structure at support proposed in this application aims to overcome this technical challenge, effectively improving the installation efficiency of composite slabs at beam supports, reducing manpower consumption, conserving resources, promoting green energy conservation and environmental protection, and contributing to the high-quality development of the construction industry.

[0028] The following is combined with Figure 1 The following describes embodiments of the present invention.

[0029] According to an embodiment of this utility model, a construction structure for a composite slab support is provided, comprising:

[0030] Composite slab 1 is disposed on one side of structural beam 2 and located at the bottom end of structural slab 3. Composite slab 1 can serve as a precast base plate for structural slab 3. It should be noted that composite slab 1 can be supported by scaffolding during installation, and a supporting template can also be installed between composite slab 1 and the scaffolding below.

[0031] Sleeve 4 is embedded through the composite plate 1 to form a structural node; sleeve 4 is embedded during the fabrication of composite plate 1, and the port of sleeve 4 is connected to the outside.

[0032] Anchor steel bars 5 are inserted into the sleeve 4 and extend into the structural beam 2; the composite slab 1 is hoisted to the designated position, and then the anchor steel bars 5 are inserted into the sleeve 4. In the prior art, with the structural beam 2 already tied, it is difficult to directly insert the structural steel bars into the structural beam 2 according to the original structure of the composite slab 1, which is time-consuming and labor-intensive. Figure 1 As shown, the anchoring steel bar 5 extends downward into the structural beam 2.

[0033] Wherein, structural beam 2 is a cast-in-place beam, and structural slab 3 is a cast-in-place slab. Structural beam 2 and structural slab 3 are connected, specifically, the end supports of structural beam 2 are connected to structural slab 3.

[0034] In this application, a pre-embedded sleeve 4 is inserted during the fabrication of the composite slab 1, and anchoring steel bars 5 are inserted into the sleeve 4 and extend into the structural beam 2. During the pouring of the structural beam 2, the anchoring steel bars 5 are anchored to the structural beam 2. During the pouring of the structural slab 3, the sleeve 4 is sealed to fix the sleeve 4 and the anchoring steel bars 5, thus fixing the composite slab 1 and the structural slab 3. The composite slab 1 is anchored to the structural beam 2.

[0035] In one alternative embodiment, the end face of the sleeve 4 is flush with the surface of the composite plate 1.

[0036] In this application, the end face of the sleeve 4 is flush with the surface of the composite slab 1, effectively preventing the sleeve 4 from colliding or interfering with the reinforcing bars of the structural beam 2 or structural slab 3 during hoisting. In traditional construction, exposed sleeves 4 or reinforcing bars are prone to contact with the surrounding structure due to their protruding parts, leading to difficulties in hoisting positioning or even damage to components. This solution simplifies the hoisting operation process and reduces the number of adjustments by optimizing the embedment depth of the sleeve 4, significantly improving installation efficiency. In addition, the flush design can also prevent the flow of concrete from being obstructed during pouring, ensuring a tight bond between the sleeve 4 and the cast-in-place structure, thereby enhancing the overall integrity of the joint. This improvement not only reduces construction complexity but also reduces quality risks caused by collisions, and has high engineering practical value.

[0037] In one optional embodiment, the reinforcing bars of the structural beam 2 are tied to the reinforcing bars of the structural slab 3. This allows the structural beam 2 and the structural slab 3 to be connected. Specifically, the longitudinal reinforcing bars on the surface of the structural slab 3 should extend to the inside of the outer longitudinal reinforcing bars of the structural beam 2 at the end supports and then bend. When the straight section length is ≥1a, bending is not required.

[0038] By tying the reinforcing bars of structural beam 2 and structural slab 3 together, the overall load-bearing performance of the beam-slab joint is enhanced. In traditional processes, independent tying of beam and slab reinforcing bars may lead to discontinuous stress transfer in the joint area, affecting the seismic resistance and load-bearing capacity of the structure. This application, through coordinated tying, forms a unified load-bearing system for the beam and slab reinforcing bars, enhancing the shear and bending resistance of the joint. Simultaneously, the standardized tying process reduces on-site construction errors, ensuring that the spacing and position of the reinforcing bars meet design requirements, thereby improving construction quality. It also simplifies subsequent pouring procedures, avoiding concrete pouring defects caused by reinforcing bar misalignment, which is of great significance for improving the durability of the project.

[0039] In one optional embodiment, the reinforcing bars within the composite slab 1 do not extend beyond the surface of the composite slab 1. This prevents interference with the reinforcing bars of the structural beam 2 or structural slab 3 during hoisting of the composite slab 1. Since the reinforcing bars within the composite slab 1 do not protrude, sleeves 4 are added to the mold of the composite slab 1 during factory production. The anchoring reinforcing bars 5 are manually placed and inserted into the structural beam 2 after the composite slab 1 is hoisted, and then cast together with the structural beam 2 and structural slab 3.

[0040] By limiting the outward extension length of the reinforcing bars inside the composite slab 1, the safety hazards caused by exposed reinforcing bars during transportation and hoisting are resolved. In traditional non-closely fitted composite slabs 1, the outward extension of the reinforcing bars is prone to deformation or damage during transportation, making it difficult to accurately insert them into the structural beams 2 during on-site installation. This application strictly controls the position of the reinforcing bars during factory prefabrication, ensuring they are completely embedded inside the composite slab 1. This protects the integrity of the reinforcing bars and avoids snagging with surrounding structures during hoisting. Furthermore, this design reduces worker operational risks, minimizes scratches or equipment damage caused by protruding reinforcing bars, and ensures a smooth surface for subsequent pouring construction.

[0041] In one optional embodiment, the angle between the sleeve 4 and the composite plate 1 is 40° to 50°. Specifically, it can be 45°.

[0042] By controlling the angle between the sleeve 4 and the composite slab 1 within the range of 40° to 50°, the stress path and construction feasibility of the anchored steel bar 5 are optimized. This angle range balances the need for inclined insertion of the anchored steel bar 5 with the compactness of the concrete pouring: too small an angle may cause horizontal slippage of the steel bar, affecting the anchoring effect; too large an angle will increase the difficulty of insertion and weaken the pull-out resistance. Through scientifically designed angles, this application ensures the effective anchorage length of the steel bar within the structural beam 2, while making manual operation more convenient. In addition, this angle range can adapt to construction scenarios with different beam heights, enhancing the versatility of the solution and providing a reliable solution for node construction under complex engineering conditions.

[0043] In one alternative embodiment, the anchoring steel bar 5 includes a horizontal portion and an inclined portion, the horizontal portion being located on the top surface of the composite slab 1, and the inclined portion penetrating the sleeve 4 and extending into the structural beam 2.

[0044] In this application, the horizontal portion of the anchoring steel bar 5 is located on the top surface of the composite slab 1, effectively limiting the horizontal displacement of the composite slab 1 and preventing it from detaching from the structural beam 2 due to external forces. The inclined portion extends into the structural beam 2, forming a mechanical anchorage through concrete encapsulation, ensuring the shear and tensile strength of the joint. This split design separates the limiting and anchoring functions, simplifying the construction process and improving the reliability of the joint. The horizontal portion can also serve as a temporary support before pouring, assisting in the positioning of the composite slab 1 and reducing the correction time. Furthermore, the anchoring method of the inclined portion fully utilizes the bond strength of the cast-in-place concrete, avoiding potential quality hazards associated with traditional welding or mechanical connections, and offering significant economic and safety advantages.

[0045] In one optional embodiment, the diameter of the anchoring steel bar 5 is the same as the diameter of the steel bars in the composite slab 1, ensuring the consistency of material mechanical properties and the uniformity of stress at the joint. In traditional processes, using steel bars of different diameters can easily lead to stress concentration due to differences in stiffness, causing joint cracking or deformation. This application, by standardizing the steel bar specifications, makes the load transfer between the composite slab 1 and the structural beam 2 smoother and reduces sudden changes in local stress. In addition, steel bars of the same diameter facilitate factory prefabrication and on-site construction management, reduce material procurement and inventory costs, and avoid construction errors caused by mixed specifications, significantly improving the level of engineering standardization.

[0046] In one optional embodiment, the sleeve 4 and the anchoring steel bars 5 are in multiple groups, with the spacing of each group of anchoring steel bars 5 being the same as the spacing of the steel bars in the composite slab 1, thus achieving standardized and modular construction. In traditional processes, inconsistent spacing may lead to uneven distribution of anchoring points, weakening the overall strength of the joint. This application ensures balanced stress on each anchoring point by using a uniform spacing, avoiding local overload. In addition, the matching spacing design facilitates quick positioning and installation by workers, reducing measurement and adjustment time and improving construction efficiency. This design also enhances the replicability of the solution, making it applicable to engineering scenarios with different spans and load requirements, laying the foundation for large-scale industrial applications.

[0047] In one optional embodiment, the horizontal distance by which the anchoring rebar 5 extends into the structural beam 2 is not less than the greater of 15 times the diameter of the anchoring rebar 5 and the distance from the vertical centerline of the structural beam 2 to its side. This ensures the anchorage strength between the anchoring rebar 5 and the structural beam 2. Specifically, the horizontal distance by which the anchoring rebar 5 extends into the structural beam 2 should be 15 times the diameter of the anchoring rebar 5, and the distance from the vertical centerline of the structural beam 2 to its side, i.e., half the horizontal length of the structural beam 2, should be the maximum value between these two values.

[0048] The requirement stipulates that the horizontal distance of the anchoring rebar 5 extending into the structural beam 2 should not be less than 15 times the rebar diameter or the maximum value of the distance from the beam centerline to the edge, ensuring anchorage strength from a mechanical perspective. This requirement comprehensively considers the balance between the pull-out force of the rebar and the bond force of the concrete: too short a distance may lead to anchorage failure, while too long a distance wastes materials and increases construction difficulty. Through scientific calculations, this application satisfies structural safety requirements while optimizing material usage. Furthermore, this regulation provides clear standards for construction acceptance, reducing human error and ensuring project quality. This design is particularly suitable for high-intensity earthquake zones or large-span structures, significantly improving the seismic performance and durability of the joints.

[0049] This application uses a pre-embedded sleeve 4 to reserve the position for anchoring the anchoring steel bar 5; removes the protruding steel bar of the non-closely spliced ​​composite slab 1, and adopts a form similar to the closely spliced ​​composite slab 1 on the construction site, which is convenient for construction at the beam support; it is suitable for the installation of composite slab 1 at the support of structural beam 2, and the installation efficiency of composite slab 1 is greatly improved.

[0050] Specific implementation method of this application:

[0051] 1. During the detailed development of composite slab 1, the position of the pre-embedded sleeve 4 is set;

[0052] 2. Add sleeve 4 during the production process of composite slab 1. After the composite slab 1 is formed, it is transported to the construction site.

[0053] 3. The composite slab 1 is hoisted to the designated location using hoisting machinery;

[0054] 4. Manually insert anchoring steel bar 5 at the structural node at position 4 of the sleeve;

[0055] 5. Structural beam 2 and structural slab 3 are poured simultaneously, and the gaps in sleeve 4 are sealed during pouring.

[0056] This application uses the composite slab 1 to construct the node, which can reduce the construction difficulty of installing the composite slab 1 at the support. The construction method is simple, the installation of the composite slab 1 is easier, and manpower is saved.

[0057] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A construction structure at the support of a composite slab, characterized in that, include: The composite slab (1) is set on one side of the structural beam (2) and located at the bottom end of the structural slab (3); The sleeve (4) is embedded in the composite plate (1); Anchoring steel bars (5) are inserted into the sleeve (4) and extend into the structural beam (2); The structural beam (2) is a cast-in-place beam, and the structural slab (3) is a cast-in-place slab.

2. The construction structure at the composite slab support according to claim 1, characterized in that, The end face of the sleeve (4) is flush with the surface of the composite plate (1).

3. The construction structure at the composite slab support according to claim 1, characterized in that, The reinforcing bars of the structural beam (2) are tied to the reinforcing bars of the structural slab (3).

4. The construction structure at the composite slab support according to claim 2, characterized in that, The reinforcing bars in the composite slab (1) do not extend beyond the surface of the composite slab (1).

5. The construction structure at the composite slab support according to claim 1, characterized in that, The angle between the sleeve (4) and the composite plate (1) is 40° to 50°.

6. The construction structure at the composite slab support according to claim 1, characterized in that, The anchoring steel bar (5) includes a horizontal part and an inclined part. The horizontal part is located on the top surface of the composite plate (1), and the inclined part passes through the sleeve (4) and extends into the structural beam (2).

7. The construction structure at the composite slab support according to claim 1, characterized in that, The diameter of the anchoring steel bar (5) is the same as the diameter of the steel bar in the composite slab (1).

8. The construction structure at the composite slab support according to claim 1, characterized in that, The sleeve (4) and the anchoring steel bars (5) are in multiple groups, and the spacing of each group of anchoring steel bars (5) is the same as the spacing of the steel bars in the composite plate (1).

9. The construction structure at the composite slab support according to claim 8, characterized in that, The horizontal distance from which the anchoring steel bar (5) extends into the structural beam (2) shall not be less than the greater of 15 times the diameter of the anchoring steel bar (5) and the distance from the vertical centerline of the structural beam (2) to the side of the structural beam (2).

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