A concrete laminated slab connecting structure

Abstract

The utility model relates to the technical field of building construction, concretely is a kind of concrete composite board connecting structure, by embedding embedded steel in composite board assembly and not from the embedded steel in composite board assembly and stretch out, since embedded steel no longer stretch out composite board assembly outside, so that in hoisting and in situ process will not collide or scratch with beam reinforcement, it is favorable to reduce the installation difficulty caused by reinforcement conflict, help to guarantee the integrity of composite board assembly whole, effectively solve the existing composite board usually embedded steel, to realize and post-pouring concrete and beam structure effective connection, however, embedded steel often stretch out composite board outside, in the hoisting and installation process in site, exposed steel is easy to collide or scratch with the steel that has been laid on beam, leading to embedded steel to be bent or broken, even damage composite board, thereby affect construction quality problem.

Description

Technical Field

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

[0002] Composite slabs are prefabricated building components widely used in the construction of floor slabs in modern buildings. By combining prefabricated slabs with cast-in-place concrete layers, composite slabs form an integral structure, possessing not only the efficiency of prefabricated components but also meeting the integrity and load-bearing requirements of building structures. In practical applications, composite slabs can effectively shorten construction cycles, reduce on-site work, and improve construction quality, while adapting to diverse architectural space needs. They provide strong support for the development of building industrialization and are one of the important technological innovations in the modern construction field.

[0003] Existing composite slabs typically have pre-embedded reinforcing bars to achieve effective connection with the post-cast concrete and beam structure, thereby ensuring overall load-bearing performance. However, the pre-embedded reinforcing bars often extend beyond the composite slab. During on-site hoisting and installation, the exposed reinforcing bars are prone to collisions or scrapes with the reinforcing bars already laid on the beam, causing the pre-embedded reinforcing bars to be bent or broken, or even damaging the composite slab, thus affecting the construction quality.

[0004] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0005] Regarding the aforementioned issue that existing composite slabs typically have pre-embedded reinforcing bars to achieve effective connection with the subsequent concrete and beam structure, the pre-embedded reinforcing bars often protrude beyond the composite slab. During on-site hoisting and installation, these exposed bars are prone to collisions or scrapes with the existing reinforcing bars on the beams, leading to bending or breakage of the pre-embedded reinforcing bars, or even damage to the composite slab, thus affecting construction quality. The technical solution adopted by this utility model to solve this problem is as follows: A concrete composite slab connection structure includes a composite slab assembly connected to beam reinforcement and connecting reinforcement. The composite slab assembly includes embedded reinforcement, a first reserved hole and a second reserved hole. The first reserved hole is used for the connecting reinforcement to pass into the interior of the composite slab assembly, and the second reserved hole is used for the connecting reinforcement to pass out of the exterior of the composite slab assembly. The connecting reinforcement passes through the first reserved hole and the second reserved hole to connect the composite slab assembly and the beam reinforcement. The embedded reinforcement is embedded in the composite slab assembly and does not extend out of the composite slab assembly.

[0006] Furthermore, the cross-section of the composite plate assembly is rectangular, and the number of pre-embedded steel bars is four, with the four pre-embedded steel bars arranged along the four sides of the composite plate assembly.

[0007] Furthermore, the cross-section of the pre-embedded reinforcing bar is wavy.

[0008] Furthermore, the pre-embedded steel bar includes lateral segments and connecting segments that are alternately connected along the length direction. Each connecting segment is connected to two lateral segments on both sides, and the cross-section of the connecting segment is "V" shaped.

[0009] Furthermore, the connecting reinforcing bars are spaced apart along the length of the pre-embedded reinforcing bars, and each connecting reinforcing bar corresponds to a connecting segment of the pre-embedded reinforcing bar.

[0010] Furthermore, the first reserved hole is located at the top of the composite slab assembly, the second reserved hole is located at the bottom of the composite slab assembly, and a connecting channel penetrating the composite slab assembly is provided between the first reserved hole and the second reserved hole. The connecting channel is located on the side of the connecting section away from the beam reinforcement, and the cross-section of the connecting reinforcement is U-shaped.

[0011] Furthermore, the spacing between adjacent connecting segments is L1, where 100mm < L1 < 200mm.

[0012] Furthermore, the connecting segment includes a first connecting edge and a second connecting edge, which are connected at an angle and have rounded corners.

[0013] Furthermore, an included angle α is formed between the first connecting edge and the second connecting edge, where 40° < included angle α < 50°.

[0014] Furthermore, the diameter of both the first reserved hole and the second reserved hole is 10mm.

[0015] The beneficial effects of this utility model are as follows: This invention embeds pre-embedded reinforcing bars within the composite slab assembly without extending them out. Because these pre-embedded reinforcing bars no longer protrude from the outside of the composite slab assembly, they will not collide or scrape with the beam reinforcing bars during hoisting and positioning. This reduces installation difficulties caused by reinforcing bar conflicts and helps ensure the overall integrity of the composite slab assembly. It effectively solves the problem that existing composite slabs typically embed reinforcing bars to achieve effective connection with the post-cast concrete and beam structure. However, these pre-embedded reinforcing bars often protrude from the composite slab, making them prone to collision or scraping with the existing reinforcing bars on the beam during on-site hoisting and installation. This can lead to the pre-embedded reinforcing bars being bent or broken, or even damaging the composite slab, thus affecting construction quality.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1This is a structural schematic diagram of the composite slab assembly and beam reinforcement connection of this utility model; Figure 2 This is a structural schematic diagram of the composite plate assembly of this utility model; Figure 3 for Figure 2 An enlarged view of section B marked on the map; Figure 4 This is a schematic diagram and a partially enlarged schematic diagram of the structure of the pre-embedded steel bars and connecting steel bars of this utility model; Figure 5 for Figure 1 A cross-sectional view along line AA. Detailed Implementation

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1 to 5 The concrete composite slab connection structure shown includes a composite slab assembly 2 connected to beam reinforcement 1, and connecting reinforcement 3. The composite slab assembly 2 includes embedded reinforcement 21, a first reserved hole and a second reserved hole. The first reserved hole is used for the connecting reinforcement 3 to pass into the interior of the composite slab assembly 2, and the second reserved hole is used for the connecting reinforcement 3 to pass out of the exterior of the composite slab assembly 2. The connecting reinforcement 3 passes through the first reserved hole and the second reserved hole to connect the composite slab assembly 2 and the beam reinforcement 1. The embedded reinforcement 21 is embedded in the composite slab assembly 2 and does not extend out of the composite slab assembly 2. This invention embeds pre-embedded reinforcing bars within the composite slab assembly without extending them out. Because these pre-embedded reinforcing bars no longer protrude from the outside of the composite slab assembly, they will not collide or scrape with the beam reinforcing bars during hoisting and positioning. This reduces installation difficulties caused by reinforcing bar conflicts and helps ensure the overall integrity of the composite slab assembly. It effectively solves the problem that existing composite slabs typically embed reinforcing bars to achieve effective connection with the post-cast concrete and beam structure. However, these pre-embedded reinforcing bars often protrude from the composite slab, making them prone to collision or scraping with the existing reinforcing bars on the beam during on-site hoisting and installation. This can lead to the pre-embedded reinforcing bars being bent or broken, or even damaging the composite slab, thus affecting construction quality.

[0020] Furthermore, by setting connecting steel bars 3 to connect the composite slab assembly 2 and the beam steel bars 1, the stress transmission path of the connection node can be optimized in a targeted manner. At the same time, although the pre-embedded steel bars 21 are not exposed, they can still play a role in enhancing the structural strength inside the composite slab assembly 2. The combination of the two makes the connection between the composite slab assembly 2 and the beam steel bars 1 both firm and reliable, and can also ensure the load-bearing performance and stability of the overall structure, which is conducive to meeting the safety requirements of building structures.

[0021] Furthermore, the first and second reserved holes allow the connecting steel bars 3 to pass through, thereby achieving a reliable connection between the composite slab assembly 2 and the beam steel bars 1. This connection method is more precise and orderly, enabling the composite slab assembly 2 to effectively combine with the post-cast concrete and beam structure, which helps to ensure the strength and stability of the connection parts and effectively improves the overall structural quality.

[0022] like Figures 1 to 5 The cross-section of the composite plate assembly 2 shown is rectangular, and there are four embedded steel bars 21, which are arranged along the four sides of the composite plate assembly 2. Furthermore, the four pre-embedded steel bars 21 are arranged along the four sides of the rectangular cross-section of the composite slab assembly 2, forming a ring-shaped load-bearing support structure. This structure can evenly distribute external forces to each edge area of ​​the composite slab assembly 2, avoiding local stress concentration. This is beneficial to improving the flexural and shear resistance of the composite slab assembly 2 and helps to ensure the structural stability of the composite slab assembly 2 during hoisting, transportation and subsequent use.

[0023] Furthermore, the four pre-embedded steel bars 21 are arranged along the four sides of the rectangular cross-section of the composite slab assembly 2, which can form a spatial force transmission path with the connecting steel bars 3, beam steel bars 1, etc., providing structural support for the subsequent reliable connection through the first reserved hole and the second reserved hole to pass the connecting steel bars 3, which is conducive to improving the overall integrity of the node.

[0024] Furthermore, the rectangular composite slab assembly 2 has a regular shape, and four pre-embedded steel bars 21 are arranged along the four sides of the rectangular cross-section of the composite slab assembly 2, providing a clear positioning benchmark for construction and installation. During on-site hoisting and installation, construction personnel can quickly and accurately place the composite slab assembly 2 into the predetermined position and connect it with the beam steel bars 1 or other structures through the connecting steel bars 3, which is conducive to improving construction efficiency and installation accuracy and helps to reduce installation errors.

[0025] like Figures 1 to 5 The cross-section of the pre-embedded steel bar 21 shown is wavy; Furthermore, the wavy cross section can increase the contact area between the embedded steel bar 21 and the concrete inside the composite slab assembly 2. At the same time, the wavy structure can form a mechanical interlocking effect, which is beneficial to resisting the relative slippage between the steel bar and the concrete, and helps to improve the collaborative performance of the two, effectively avoiding the structural stress transmission failure problem caused by insufficient interface bonding.

[0026] Furthermore, compared to traditional circular or rectangular cross-section embedded steel bars 21, the corrugated cross-section can more evenly distribute external forces to the surrounding concrete when under stress, which helps to reduce local stress concentration. Especially when the composite slab assembly 2 is subjected to bending and shear loads, it can enhance the restraining effect of the embedded steel bars 21 on the concrete, thereby enhancing the crack resistance and load-bearing capacity of the composite slab assembly 2.

[0027] Furthermore, the wavy embedded steel bars 21 are easier to position and fix during the prefabrication of the composite slab assembly 2. Their special shape can form a certain locking effect on the template, which helps to reduce the displacement of the embedded steel bars 21 during the concrete pouring process, and helps to ensure the accuracy of the position of the embedded steel bars 21, thereby improving the prefabrication quality of the composite slab assembly 2.

[0028] like Figures 1 to 5 The pre-embedded steel bar 21 shown includes lateral segments 211 and connecting segments 212 that are alternately connected along the length direction. Each connecting segment 212 is connected to two lateral segments 211 on both sides. The cross-section of the connecting segment 212 is "V" shaped. Furthermore, the "V"-shaped connecting section 212 can increase the contact area between the embedded steel bar 21 and the concrete. At the same time, its protruding structure can form a more stable mechanical interlock with the concrete, effectively resisting the relative slippage between the embedded steel bar 21 and the concrete, which helps to improve the synergistic stress performance of the two and effectively avoid structural load failure caused by insufficient anchorage.

[0029] Furthermore, the alternating connection between the lateral segment 211 and the "V"-shaped connecting segment 212 can evenly distribute the external force along the length of the embedded steel bar 21 to various parts. In particular, the "V"-shaped connecting segment 212 can transfer the load to the adjacent lateral segment 211 through the inclined surfaces on both sides, thereby reducing local stress concentration and enhancing the overall bending and shear resistance of the embedded steel bar 21, further improving the structural strength of the composite slab assembly 2.

[0030] Furthermore, the lateral segment 211 and the connecting segment 212 are arranged alternately, which can form a structural gap on the side of the connecting segment 212 away from the beam reinforcement 1, so that the connecting reinforcement 3 can pass through, thereby realizing a reliable connection between the composite slab assembly 2 and the beam reinforcement 1, while avoiding the occurrence of dense reinforcement collisions.

[0031] like Figures 1 to 5 The connecting steel bars 3 shown are spaced apart along the length of the embedded steel bars 21, and each connecting steel bar 3 corresponds to a connecting segment 212 of the embedded steel bar 21. Furthermore, the connection reinforcement 3 is set in a one-to-one correspondence with the connection segment 212, which is conducive to the direct transfer of the load of the beam reinforcement 1 to the "V"-shaped connection segment 212 area with strong mechanical properties in the embedded reinforcement 21 through the connection reinforcement 3. By utilizing the good anchorage and shear resistance of the connection segment 212, an efficient and clear force transmission path is formed, which helps to improve the overall stress performance of the composite node.

[0032] Furthermore, the corresponding spacing avoids the excessive concentration of connecting steel bars 3 in certain areas. This not only ensures the necessary number of connections but also provides sufficient space for concrete pouring, which is conducive to the compact formation of concrete and prevents quality defects such as voids and honeycombs caused by excessive steel bars.

[0033] Furthermore, the connecting section 212 has a "V" shaped cross-section, which has excellent anchorage performance. The connecting steel bar 3 is inserted through the connecting section and works in conjunction with the connecting section, which is beneficial to significantly improve the shear bonding and pull-out stability between the composite slab and the post-cast layer and the beam, and prevent interface slippage or separation.

[0034] like Figures 1 to 5 The first reserved hole shown is located at the top of the composite slab assembly 2, and the second reserved hole is located at the bottom of the composite slab assembly 2. A connecting channel is provided between the first reserved hole and the second reserved hole, penetrating the composite slab assembly 2. The connecting channel is located on the side of the connecting section 212 away from the beam reinforcement 1. The cross-section of the connecting reinforcement 3 is U-shaped. Furthermore, the first reserved hole is set at the top of the composite slab assembly 2 and the second reserved hole is set at the bottom of the composite slab assembly 2, together with the through connecting channel, to form a top-to-bottom insertion path. This makes it easy for construction personnel to directly insert the "U"-shaped connecting steel bar 3 from the top of the composite slab assembly 2 into the connecting channel and out from the bottom. The connection with the beam steel bar 1 can be completed without complicated operations, which helps to reduce the difficulty of on-site installation and effectively improves construction efficiency.

[0035] Furthermore, the connecting steel bar 3 with a "U"-shaped cross-section has a larger moment of inertia and a larger contact area with concrete. Compared with round steel bars, it has higher bending stiffness and stronger anchorage performance. At the same time, the "U"-shaped structure can be better embedded in the post-cast concrete to form an effective shear key, which is conducive to enhancing the overall collaborative working ability of the composite slab and the beam.

[0036] Furthermore, after the U-shaped connecting steel bar 3 passes through the first and second reserved holes, the connecting steel bar 3 abuts against and embeds itself at the corner of the connecting section 212, forming a physical locking position. This not only achieves spatial positioning and preliminary fixation between the connecting steel bar 3 and the embedded steel bar 212, preventing the connecting steel bar 3 from shifting during concrete pouring, but also provides a stable and reliable load-bearing support point for the connecting steel bar 3. When the structure is under stress, the load can be efficiently transferred to the entire composite slab through this support point along the wave path of the embedded steel bar 21, making the force transmission path clearer, continuous, and dispersed, effectively improving the shear resistance, pull resistance, and collaborative load-bearing performance of the node area, and further enhancing the integrity and safety of the composite structure.

[0037] Specifically, in the concrete composite slab connection structure, the "U"-shaped connecting steel bar 3 serves as the core connector. One end engages with the pre-embedded steel bar 21 through a pre-drilled hole in the composite slab component 2, while the other end is fixed to the beam steel bar 1, thus forming a stable connection. This effectively transfers the load between the composite slab and the concrete beam, ensuring a reliable connection between the two under normal operating conditions and preventing relative displacement. In extreme cases where an earthquake occurs, causing the interface between the precast base slab and the cast-in-place composite layer to detach, the "U"-shaped connecting steel bar 3 can transform into a hanger by virtue of its fixed ends to the composite slab and the beam, firmly "holding" the load through its tensile strength. "The composite floor slab prevents it from separating and falling off from the beams, providing a crucial guarantee for the safety of the building structure during earthquakes. Furthermore, according to existing requirements, in order to ensure structural safety, the thickness of the cast-in-place composite layer generally needs to be ≥100mm. However, this utility model, by setting connecting steel bars 3, the "U"-shaped connecting steel bars 3 can bear the key tensile force through their own tensile strength, and can effectively ensure that the composite slab does not fall off even under extreme working conditions. There is no need to rely on a thicker cast-in-place composite layer to enhance stability. Therefore, the thickness of the cast-in-place composite layer only needs to be ≥60mm to meet the usage requirements, which is conducive to reducing the amount of cast-in-place concrete used and helping to reduce manufacturing costs."

[0038] like Figures 1 to 5 The spacing between adjacent connecting segments 212 shown is L1, where 100mm < L1 < 200mm; Furthermore, the spacing of 100mm < L1 < 200mm not only allows adjacent connecting sections 212 to form dense and uniform stress support points, ensuring that the pre-embedded steel bars 21 fully cover the strengthening effect of the composite slab assembly 2, avoiding local weakness due to excessive spacing, but also avoids excessive steel bar density due to excessive spacing, which helps reduce material waste. At the same time, it leaves sufficient space for concrete pouring, which helps ensure the density of concrete.

[0039] Furthermore, since the connecting steel bars 3 and the connecting segments 212 are set in a one-to-one correspondence, and the spacing of 100mm < L1 < 200mm is set, the connecting steel bars 3 can form a reasonable spacing distribution on the composite slab assembly 2. This not only ensures the connection stability between the composite slab and the beam through multiple connection points, but also avoids increasing the construction difficulty due to excessively dense connection points. At the same time, it allows the load to be evenly transferred through multiple connection points, which helps to reduce the stress burden on a single connection node.

[0040] Furthermore, if the spacing is too small, the "V"-shaped connection segments 212 of the pre-embedded steel bars 21 will be too dense, which will lead to excessively dense local steel bar arrangement, hindering concrete flow and easily forming pouring defects such as voids and honeycombs; if the spacing is too large, the anchor points will be sparse, making it difficult to effectively transmit shear and tensile forces and weakening the integrity of the composite interface; the spacing setting of 100mm < L1 < 200mm ensures sufficient anchor density while providing ample space for concrete flow and compaction.

[0041] like Figures 1 to 5 The connecting segment 212 shown includes a first connecting edge 2121 and a second connecting edge 2122, wherein the first connecting edge 2121 and the second connecting edge 2122 are connected at an angle and have rounded corners; Furthermore, the first connecting edge 2121 and the second connecting edge 2122 are connected at an angle and rounded at the corners, which can avoid stress concentration at the connection between the first connecting edge 2121 and the second connecting edge 2122 due to the presence of sharp edges. When the composite slab is subjected to load or temperature changes, it can effectively disperse local stress and prevent the embedded steel bar 21 from cracking or breaking at this point. This is beneficial to extending the service life of the embedded steel bar 21 and the composite slab assembly 2, and helps to ensure the long-term stability of the structure.

[0042] Furthermore, the rounded corners eliminate the sharp edges of the connecting section 212, allowing the concrete slurry to fill the gaps around the connecting section 212 more smoothly during precast concrete pouring, avoiding the formation of air bubbles or voids due to the obstruction of sharp edges, thereby improving the density of the concrete. At the same time, the rounded connection structure can reduce local compression of the concrete, making the embedded steel bar 21 bond more tightly with the concrete, further enhancing the synergistic stress performance of the two.

[0043] Furthermore, the rounded corner treatment can remove the sharp parts of the connecting section 212, and can prevent construction workers from being scratched by sharp edges during the processing of the embedded steel bars 21 and the assembly of the composite plate assembly 2, which helps to reduce the operational safety risks.

[0044] like Figures 1 to 5 An included angle α is formed between the first connecting edge 2121 and the second connecting edge 2122 shown, where 40° < included angle α < 50°; Furthermore, the angle setting of 40° < angle α < 50° not only allows the "V"-shaped connecting segment 212 to form a sufficient opening range, increasing the contact area and mechanical interlocking force with the concrete, thereby ensuring the strong anchoring effect of the embedded steel bar 21 and the concrete and avoiding relative slippage, but also avoids the connection segment 212 occupying too much space and increasing the amount of steel bars due to an excessively large angle, or the anchoring effect being weakened due to an excessively small angle, thus achieving efficient use of materials while ensuring performance.

[0045] Furthermore, the angle setting of 40° < included angle α < 50° allows the connecting section 212 to better adapt to the stress characteristics of the composite plate assembly 2. When the composite plate is subjected to bending and shear loads, the inclined first connecting edge 2121 and second connecting edge 2122 can evenly distribute the external force to the lateral sections 211 on both sides, reducing local stress concentration. At the same time, the reasonable included angle gives the connecting section 212 a certain elastic deformation capacity, which can buffer stress when the load fluctuates, prevent the embedded steel bar 21 from breaking due to excessive rigidity, and help improve the crack resistance and deformation resistance of the structure.

[0046] Furthermore, if the included angle α is too small, the connecting segment 212 will be too sharp. Although it increases the embedment depth, it is easy to cause local stress concentration and form a weak wedge-shaped area in the concrete, which will reduce the anchorage reliability. If the included angle α is too large, the connecting segment 212 will become too flat, weakening its "biting" effect on the concrete and reducing its pull-out and shear resistance. An angle setting of 40° < included angle α < 50° can provide sufficient mechanical interlocking effect while maintaining a reasonable stress angle, which is conducive to significantly improving the anchorage efficiency between the embedded steel bar 21 and the concrete.

[0047] like Figures 1 to 5 The diameter of both the first and second reserved holes shown is 10mm; Furthermore, the 10mm hole diameter can form a tight fit with the connecting steel bar 3 used in conventional construction. This not only avoids the connecting steel bar 3 from shaking inside the hole due to an excessively large hole diameter, affecting the stability of force transmission, but also prevents the difficulty of inserting the steel bar due to an excessively small hole diameter. This helps to ensure the compatibility between the connecting steel bar 3 and the reserved hole, laying the foundation for the reliable connection between the composite slab and the beam.

[0048] Furthermore, the 10mm aperture ensures a stronger connection between the connecting steel bar 3 and the embedded steel bar 21, thereby optimizing stress distribution, effectively avoiding stress concentration, and improving the overall load-bearing capacity of the composite slab. The appropriate aperture ensures a tighter contact between the connecting steel bar 3 and the embedded steel bar 21, thereby enhancing the connection strength and reducing the risk of structural loosening or failure due to weak connection.

[0049] The working principle is as follows: A prefabricated composite slab assembly 2 with a rectangular cross-section is formed in the factory. Four embedded steel bars 21 are embedded along its four sides. Each embedded steel bar 21 consists of alternating lateral sections 211 and V-shaped connecting sections 212, without protruding beyond the exterior of the composite slab assembly 2. A first pre-drilled hole is pre-drilled at the top of the composite slab assembly 2, and a second pre-drilled hole is pre-drilled at the bottom. The connection channel between the two is located on the side of the connecting section 212 away from the beam steel bars 1. During on-site construction, the composite slab assembly 2 is first hoisted onto the beam for positioning. Because the embedded steel bars 21 are not exposed, they can avoid contact with the steel bars already laid on the beam. The beam reinforcement 1 is impacted; then the "U"-shaped connecting reinforcement 3 is inserted from the first reserved hole at the top, and exits from the second reserved hole at the bottom through the connecting channel. After insertion, the connecting reinforcement 3 is locked at the inflection point of the connecting section 212; finally, the connecting reinforcement 3 is fixed to the beam reinforcement 1 to form a force-bearing system of "connecting reinforcement - embedded reinforcement - composite slab assembly". The connecting reinforcement 3 transfers the beam load to the embedded reinforcement 21, and then the embedded reinforcement 21 is distributed to the composite slab assembly 2 through the strong anchoring effect of the connecting section 212 and the concrete, so as to achieve reliable connection between the composite slab and the beam and efficient load transfer.

[0050] The implementation method of Example 1 is as follows: A concrete composite slab connection structure includes a composite slab assembly 2 connected to beam reinforcement 1, and connecting reinforcement 3. The composite slab assembly 2 includes embedded reinforcement 21, a first reserved hole and a second reserved hole. The first reserved hole is used for the connecting reinforcement 3 to pass into the interior of the composite slab assembly 2, and the second reserved hole is used for the connecting reinforcement 3 to pass out of the exterior of the composite slab assembly 2. The connecting reinforcement 3 passes through the first reserved hole and the second reserved hole to connect the composite slab assembly 2 and the beam reinforcement 1. The embedded reinforcement 21 is embedded in the composite slab assembly 2 and does not extend out of the composite slab assembly 2.

[0051] This invention embeds pre-embedded reinforcing bars within the composite slab assembly without extending them out. Because these pre-embedded reinforcing bars no longer protrude from the outside of the composite slab assembly, they will not collide or scrape with the beam reinforcing bars during hoisting and positioning. This reduces installation difficulties caused by reinforcing bar conflicts and helps ensure the overall integrity of the composite slab assembly. It effectively solves the problem that existing composite slabs typically embed reinforcing bars to achieve effective connection with the post-cast concrete and beam structure. However, these pre-embedded reinforcing bars often protrude from the composite slab, making them prone to collision or scraping with the existing reinforcing bars on the beam during on-site hoisting and installation. This can lead to the pre-embedded reinforcing bars being bent or broken, or even damaging the composite slab, thus affecting construction quality.

[0052] The implementation method of Example 2 is as follows: Based on Example 1, Example 2 also has the following implementation method: The cross-section of the composite plate assembly 2 is rectangular, and the number of pre-embedded steel bars 21 is four. The four pre-embedded steel bars 21 are arranged along the four sides of the composite plate assembly 2.

[0053] The implementation method of Example 3 is as follows: Based on Example 2, Example 3 also has the following implementation method: the cross-section of the pre-embedded steel bar 21 is wavy.

[0054] The implementation method of Example 4 is as follows: Based on Example 3, Example 4 also has the following implementation method: The pre-embedded steel bar 21 includes lateral segments 211 and connecting segments 212 that are alternately connected along the length direction. Each connecting segment 212 is connected to two lateral segments 211 on both sides. The cross-section of the connecting segment 212 is "V" shaped.

[0055] The implementation method of Example 5 is as follows: Based on Example 4, Example 5 also has the following implementation method: the connecting steel bars 3 are spaced apart along the length direction of the pre-embedded steel bars 21, and each connecting steel bar 3 is correspondingly set with a connecting segment 212 of the pre-embedded steel bar 21.

[0056] The implementation method of Example 6 is as follows: Based on Example 5, Example 6 also has the following implementation method: the first reserved hole is located at the top of the composite slab assembly 2, the second reserved hole is located at the bottom of the composite slab assembly 2, a connecting channel penetrating the composite slab assembly 2 is provided between the first reserved hole and the second reserved hole, the connecting channel is located on the side of the connecting section 212 away from the beam reinforcement 1, and the cross-section of the connecting reinforcement 3 is U-shaped.

[0057] The implementation method of Example 7 is as follows: Based on Example 4, Example 7 also has the following implementation method: the spacing between adjacent connecting segments 212 is L1, 100mm < L1 < 200mm.

[0058] The implementation method of Example 8 is as follows: Based on Embodiment 4, Embodiment 8 also has the following implementation method: the connecting segment 212 includes a first connecting edge 2121 and a second connecting edge 2122, the first connecting edge 2121 and the second connecting edge 2122 are connected at an angle and have rounded corners.

[0059] The implementation method of Example 9 is as follows: Based on Example 8, Example 9 also has the following implementation method: an included angle α is formed between the first connecting edge 2121 and the second connecting edge 2122, where 40° < included angle α < 50°.

[0060] The implementation method of Example 10 is as follows: Based on Example 1, Example 10 also has the following implementation method: the diameter of the first reserved hole and the second reserved hole are both 10mm.

[0061] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A concrete composite slab connection structure, comprising a composite slab assembly (2) connected to beam reinforcement (1), and connecting reinforcement (3), characterized in that: The composite slab assembly (2) includes embedded reinforcing bars (21), a first reserved hole and a second reserved hole. The first reserved hole is used for the connecting reinforcing bars (3) to pass into the interior of the composite slab assembly (2). The second reserved hole is used for the connecting reinforcing bars (3) to pass out of the exterior of the composite slab assembly (2). The connecting reinforcing bars (3) pass through the first reserved hole and the second reserved hole to connect the composite slab assembly (2) and the beam reinforcing bars (1). The embedded reinforcing bars (21) are embedded in the composite slab assembly (2) and do not extend out of the composite slab assembly (2).

2. The concrete composite slab connection structure according to claim 1, characterized in that: The cross-section of the composite plate assembly (2) is rectangular, and the number of the pre-embedded steel bars (21) is four, with the four pre-embedded steel bars (21) arranged along the four sides of the composite plate assembly (2).

3. The concrete composite slab connection structure according to claim 2, characterized in that: The cross-section of the pre-embedded steel bar (21) is wavy.

4. The concrete composite slab connection structure according to claim 3, characterized in that: The pre-embedded steel bar (21) includes lateral segments (211) and connecting segments (212) that are alternately connected along the length direction. Each connecting segment (212) is connected to two lateral segments (211) on both sides. The cross-section of the connecting segment (212) is "V" shaped.

5. The concrete composite slab connection structure according to claim 4, characterized in that: The connecting steel bars (3) are spaced apart along the length direction of the embedded steel bars (21), and each connecting steel bar (3) corresponds to a connecting segment (212) of the embedded steel bars (21).

6. The concrete composite slab connection structure according to claim 5, characterized in that: The first reserved hole is located at the top of the composite plate assembly (2), the second reserved hole is located at the bottom of the composite plate assembly (2), a connecting channel is provided between the first reserved hole and the second reserved hole, the connecting channel is located on the side of the connecting section (212) away from the beam reinforcement (1), and the cross-section of the connecting reinforcement (3) is U-shaped.

7. The concrete composite slab connection structure according to claim 4, characterized in that: The spacing between adjacent connecting segments (212) is L1, where 100mm < L1 < 200mm.

8. The concrete composite slab connection structure according to claim 4, characterized in that: The connecting segment (212) includes a first connecting edge (2121) and a second connecting edge (2122), the first connecting edge (2121) and the second connecting edge (2122) are connected at an angle and have rounded corners.

9. A concrete composite slab connection structure according to claim 8, characterized in that: An included angle α is formed between the first connecting edge (2121) and the second connecting edge (2122), where 40° < included angle α < 50°.

10. A concrete composite slab connection structure according to claim 1, characterized in that: The diameter of both the first and second reserved holes is 10 mm.

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