Reinforced concrete bearing floor slab structure based on embedded structure

Abstract

The invention relates to the technical field of assembly type floor slabs, and discloses a reinforced concrete bearing floor slab structure based on an embedded structure, which comprises a plurality of floor slab bodies, embedded modules are embedded on the outer surfaces of the floor slab bodies, concave seams are formed in the outer sides of the floor slab bodies, and the embedded modules are embedded in the concave seams. A locking piece is arranged in the concave seam; the embedded module comprises a first connecting box and a second connecting box. The reinforced concrete bearing floor slab structure based on the embedded structure can effectively solve the technical problems that in the prior art, embedded steel bars of prefabricated floor slabs are generally linear, when a plurality of floor slabs are spliced, lap joint of the embedded linear steel bars completely depends on later-period concrete pouring for force transmission, but concrete at joints cannot be fully vibrated and compacted, and the construction efficiency is poor. The problems that honeycomb and holes are prone to occurring, under the action of follow-up loads, steel bars and concrete can be peeled off, and even a single plate of a floor slab falls off are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated floor slabs, and in particular to a reinforced concrete load-bearing floor slab structure based on a pre-embedded structure. Background Art

[0002] In the construction industry, reinforced concrete load-bearing floor slabs, as key components of building structures, bear the crucial responsibility of transmitting vertical and horizontal loads and ensuring structural stability. With the rise of prefabricated buildings, prefabricated reinforced concrete floor slabs are gaining widespread application due to their advantages such as efficient construction and controllable quality.

[0003] In the existing technology, the embedded steel bars of prefabricated floor slabs are usually straight. When multiple floor slabs are spliced ​​together, the overlap of the embedded straight steel bars completely relies on the force transmission of the later poured concrete. However, the concrete at the joints cannot be fully vibrated and compacted, and honeycombs and voids are prone to occur. Under the action of subsequent loads, the steel bars and concrete will peel off, and the floor slab may even face the risk of single slab falling off. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a reinforced concrete load-bearing floor structure based on a pre-embedded structure, which can effectively solve the problem in the prior art that the embedded steel bars of the prefabricated floor slabs are usually straight-line. When multiple floor slabs are spliced ​​together, the overlap of the embedded straight steel bars completely relies on the later pouring of concrete to transmit force. However, the concrete at the joints cannot be fully vibrated and compacted, and honeycombs and voids are prone to occur. Under the action of subsequent loads, the steel bars and concrete will peel off, and the floor slab may even face the problem of single-plate falling off.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a reinforced concrete load-bearing floor structure based on a pre-buried structure, comprising: A floor slab body, wherein the floor slab body is provided in plurality, an embedded module is embedded in the outer surface of the floor slab body, a concave slot is opened on the outer side of the floor slab body, and a locking piece is provided inside the concave slot; Among them, the embedded module includes a connecting box 1 and a connecting box 2, and the connecting box 1 and the connecting box 2 are symmetrically distributed on both sides of the floor body. A groove 1 is provided on one side of the outer surface of the connecting box 1, and a groove 2 is provided on one side of the outer surface of the connecting box 2. One side of the outer surface of the connecting box 1 is provided with a protrusion 1 that fits with the inner wall surface of the groove 2 in the adjacent floor body, and one side of the outer surface of the connecting box 2 is provided with a protrusion 2 that fits with the inner wall surface of the groove 1 in the adjacent floor body. The interiors of the protrusions 1 and 2 are fixedly connected with U-shaped steel bars, and the outer ends of the U-shaped steel bars pass through the connecting boxes 1 and 2 and extend to the interior of the floor body. The connecting boxes 1 and 2 are provided with placement cavities on the side away from the U-shaped steel bars, and the interior of the placement cavities is provided with connecting parts for combining the connecting boxes 1 and 2.

[0006] Furthermore, the connecting part includes a rotating seat fixedly connected to the bottom of the inner wall of the placement cavity, and the rotating seat is rotatably connected to the pressure block through a rotating rod arranged inside it. The outer surface of the rotating rod is provided with a torsion spring connected to the inside of the pressure block, and the outer surface of the pressure block adopts a concave arc design that fits the outer surface of the U-shaped steel bar.

[0007] Furthermore, a fixed block is fixedly connected to the inner wall surface of the placement cavity, and two fixed blocks are provided and are symmetrically distributed up and down with the pressing block as the center. A card slot is provided on the outer surface of the fixed block, and the upper and lower sides of the pressing block are fixedly connected with a card block that engages with the outer surface of the card slot.

[0008] Furthermore, the placement cavity is communicated with the interior of groove one and groove two respectively, and the inner wall cavity of the placement cavity adopts a depth gradient design, and the lowest point of the depth of the inner wall cavity of the placement cavity is close to one side of the fixing block.

[0009] Furthermore, the locking member includes a sleeve fixedly connected to the outer surface of the second protrusion, the interior of the sleeve is connected to the interior of the second groove, a through hole is opened inside the first protrusion, the circumferential inner wall of the through hole is slidably connected to a connecting column, and the circumferential inner wall of the sleeve is slidably connected to a connecting column.

[0010] Furthermore, a contraction groove is provided on the circumferential outer surface of the connecting column, the interior of the contraction groove is slidably connected to a limit block, the bottom end of the limit block is provided with a spring connected to the inner wall of the contraction groove, and the interior of the protrusion 1 is provided with a limit groove that fits with the outer surface of the limit block.

[0011] Furthermore, the outer ends of the connecting column and the connecting column are both designed with a conical surface, and the outer ends of the first and second protrusions are both designed with a bevel surface.

[0012] Furthermore, a through pipe is fixedly connected to the upper surface of the connection box 1, the top end of the through pipe extends to the upper surface of the floor body, and a connecting groove is provided inside the protrusion 1 and the protrusion 2.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a pre-embedded module, a floor slab body and a locking piece. The precise assembly of the connecting piece, U-shaped steel bar and locking piece is completed in the prefabrication stage, so that the floor slab body can be spliced ​​to form a rigid temporary locking structure before the concrete is poured. During on-site docking, after the U-shaped steel bar enters the placement cavity, it is first forced to center by the double bevels of gradually varying depth. Then, during the process of continued insertion, the pressing block is subjected to the extrusion torque of the outer circle of the U-shaped steel bar to overcome the preload force of the torsion spring and rotate ninety degrees, forming a semi-circular embrace with the concave arc surface, completing radial self-locking; synchronously, the clamping block slides into the arc-shaped clamping groove of the fixed block as it rotates, and the bevel teeth are self-locking, forming an axial irreversible clamping. The three are superimposed to form a dual mechanical lock in the horizontal and vertical directions, and the docking state can be maintained without any external temporary support. This structure achieves the designed positioning accuracy before concrete is poured, eradicating the stubborn problems of steel bar misalignment and casting displacement in traditional construction. It ensures the correct relative position of the steel bars during the construction phase, completely avoids the risk of displacement of traditional straight steel bars, and provides a precise force transmission foundation for subsequent concrete pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0015] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 This is a structural diagram of two floor slab bodies separated according to an embodiment of the present invention; Figure 3 This is a structural diagram of a floor slab body, a first connection box, and a second connection box according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a connection box 1 and a connection box 2 according to an embodiment of the present invention; Figure 5 Schematic diagram of the cross-sectional structure of a locking member according to an embodiment of the present invention; Figure 6 This is a schematic cross-sectional view of the connection box 1 and the connection box 2 from another angle according to an embodiment of the present invention; Figure 7 Schematic diagram of the structure of bump 1 and bump 2 according to an embodiment of the present invention; Figure 8 For the embodiment of the present invention Figure 7 A schematic diagram of the partially enlarged structure at point A in the middle; Figure 9 It is a structural schematic diagram of the connection box 1, the connection box 2, the rotating seat, the pressing block, the connecting column and the connecting column according to an embodiment of the present invention.

[0016] The numbers in the figure represent: 1. Floor slab body; 11. Concave seam; 12. Locking piece; 121. Sleeve; 122. Through hole; 123. Connecting column; 124. Connecting column; 1241. Shrinkage groove; 125. Limit block; 126. Spring; 127. Limit groove; 2. Embedded module; 21. Connection box one; 211. Groove one; 212. Protrusion one; 213. Placement cavity; 22. Connection box two; 221. Groove two; 222. Protrusion two; 23. U-shaped steel bar; 24. Connecting piece; 241. Rotating seat; 242. Pressure block; 243. Torsion spring; 244. Fixing block; 245. Block; 25. Through pipe; 26. Connecting groove. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example: See also Figures 1-9 The present invention provides a technical solution: a reinforced concrete load-bearing floor structure based on a pre-buried structure, comprising: The floor slab body 1 is provided with a plurality of floor slab bodies 1, and the plurality of floor slab bodies 1 are distributed in a linear array. The outer surface of the floor slab body 1 is embedded with a pre-buried module 2. The outer side of the floor slab body 1 is provided with a concave slot 11, and the interior of the concave slot 11 is provided with a locking member 12; Among them, the embedded module 2 includes a connection box 21 and a connection box 22. The connection box 21 and the connection box 22 are symmetrically distributed on both sides of the floor body 1. The connection box 21 and the connection box 22 are both provided with multiple ones. One side of the outer surface of the connection box 21 is provided with a groove 211, and one side of the outer surface of the connection box 22 is provided with a groove 221. One side of the outer surface of the connection box 21 is provided with a protrusion 212 that fits with the inner wall surface of the groove 221 in the adjacent floor body 1. One side of the outer surface of the connection box 22 A second protrusion 222 is provided which fits into the inner wall surface of the groove 1 211 in the adjacent floor slab body 1. The inside of the protrusion 1 212 and the protrusion 2 222 are fixedly connected with a U-shaped steel bar 23. The outer end of the U-shaped steel bar 23 passes through the connecting box 1 21 and the connecting box 2 22 and extends to the inside of the floor slab body 1. The side of the connecting box 1 21 and the connecting box 2 22 away from the U-shaped steel bar 23 is provided with a placement cavity 213. The inside of the placement cavity 213 is provided with a connecting piece 24 for combining the connecting box 1 21 and the connecting box 2 22.

[0020] The connecting member 24 includes a rotating seat 241 fixedly connected to the bottom of the inner wall of the placement cavity 213. The rotating seat 241 is rotatably connected to the pressure block 242 through a rotating rod arranged inside it. The outer surface of the rotating rod is provided with a torsion spring 243 connected to the inside of the pressure block 242. The outer surface of the pressure block 242 adopts a concave arc design that fits the outer surface of the circumference of the U-shaped steel bar 23.

[0021] A fixing block 244 is fixedly connected to the inner wall surface of the placement cavity 213. There are two fixing blocks 244 and they are symmetrically distributed up and down with the pressing block 242 as the center. A card slot is opened on the outer surface of the fixing block 244. The upper and lower sides of the pressing block 242 are fixedly connected with a card block 245 that engages with the outer surface of the card slot.

[0022] The placement cavity 213 is connected to the interior of the groove 1 211 and the groove 2 221 respectively. The inner wall cavity of the placement cavity 213 adopts a depth gradient design. The lowest point of the inner wall cavity depth of the placement cavity 213 is close to the side of the fixing block 244.

[0023] The locking member 12 includes a sleeve 121 fixedly connected to the outer surface of the second protrusion 222, the interior of the sleeve 121 is connected to the interior of the second groove 221, a through hole 122 is opened inside the first protrusion 212, and the circumferential inner wall of the through hole 122 is slidably connected to the connecting column 123, and the circumferential inner wall of the sleeve 121 is slidably connected to the connecting column 124.

[0024] A contraction groove 1241 is provided on the circumferential outer surface of the connecting column 124, and the interior of the contraction groove 1241 is slidably connected to a limit block 125. The bottom end of the limit block 125 is provided with a spring 126 connected to the inner wall of the contraction groove 1241, and the interior of the protrusion 212 is provided with a limit groove 127 that fits with the outer surface of the limit block 125.

[0025] The outer ends of the connecting pillar 123 and the connecting pillar 124 are both designed with a conical surface, and the outer ends of the first protrusion 212 and the second protrusion 222 are both designed with a bevel surface.

[0026] A through pipe 25 is fixedly connected to the upper surface of the connection box 1 21 , and the top end of the through pipe 25 extends to the upper surface of the floor slab body 1 . A connecting groove 26 is formed inside the protrusion 1 212 and the protrusion 2 222 .

[0027] Conventional straight rebar is spliced ​​together using only loose contact through end-to-end alignment or simple cross-lapping, without any mechanical locking mechanism. In this case, before concrete is poured, the bars rely solely on gravity or temporary manual binding to maintain relative position. Lacking self-locking or mechanical interlocking, these bars cannot form a temporary stable structure before pouring, making them prone to shifting during construction.

[0028] Prefabrication stage: In actual application, the interior of connecting box 1 21 and connecting box 2 22 are pre-installed with connecting parts 24, the connecting column 123 is placed inside the through hole 122, the connecting column 124 is placed inside the sleeve 121, and the interior of connecting box 1 21 and connecting box 2 22 are pre-embedded with U-shaped steel bars 23. In the mold of the prefabrication factory, multiple connecting boxes 1 21 are fixed on one side of the mold for manufacturing the floor slab body 1 according to the designed position, and multiple connecting boxes 22 are fixed on the other side of the mold for manufacturing the floor slab body 1, ensuring that the two are symmetrically distributed on the two side edges of the floor slab body 1, and the protrusion 1 212 and the protrusion 2 222 are facing the outside of the mold, and the concave seam 11 on the side of the floor slab body 1 is formed by the side mold.

[0029] The interior of the floor slab body 1 is also embedded with pre-buried stress-bearing steel bars and connecting steel bars. The embedded end of the U-shaped steel bar 23 passes through the connecting box 1 21 and the connecting box 2 22, and extends to the interior of the floor slab body 1. It is tied and fixed with the stress-bearing steel bars of the floor slab body 1 to form an integral stress-bearing skeleton (the butt-jointed end of the U-shaped steel bar 23 is located in the placement cavity 213 of the connecting box 1 21 and the connecting box 2 22 during the subsequent butt-jointing process. When the adjacent floor slab bodies 1 are butt-jointed, the end fits into the concave arc surface of the pressing block 242 in the placement cavity 213 of the other floor slab body 1, and is clamped and locked by the connector 24). The embedded end of the U-shaped steel bar 23 is anchored inside the concrete component of the floor slab body 1, and the external load is transferred to the concrete structure by using the bond force between the concrete and the steel bar. This can improve the anchoring performance between the steel bar and the concrete, prevent the steel bar from being pulled out of the concrete, and ensure the safety and stability of the entire structure.

[0030] Concrete is poured into the mold, vibrated and compacted, and then cured to the designed strength, so that the embedded module 2 and the floor slab body 1 form an inseparable whole, and the concave seam 11 is formed simultaneously.

[0031] The process of connecting multiple floor slab bodies 1: The floor slab body 1 is hoisted to the designed elevation by a tower crane, and the level is adjusted using a level so that two adjacent floor slab bodies 1 are on the same horizontal plane, and a gap is reserved for construction. The mold side panels that fix the multiple embedded modules 2 are removed. In this state, the connector 24 inside the placement cavity 213 is in an open state. Two rotating seats 241 are fixedly connected to the inner wall surface of each placement cavity 213. The two rotating seats 241 are symmetrically distributed on the upper and lower sides of the pressure block 242. The pressure block 242 is rotatably connected to the outer side of the rotating seat 241 via a rotating shaft set inside it. Under the action of the torsion spring 243, the concave arc on the outer surface of the pressure block 242 faces the outside of the floor slab body 1, forming a pre-opening posture in the splicing direction.

[0032] Using one floor slab body 1 (left) as a reference, push the other floor slab body 1 (right) horizontally, so that the protrusion 1 212 of the right floor slab body 1 inserts into the groove 2 221 of the left floor slab body 1, and the protrusion 2 222 of the left floor slab body 1 inserts into the groove 1 211 of the right floor slab body 1. The inclined surfaces at the ends of protrusions 112 and 222 guide automatic alignment, compensating for installation errors. Because the outer ends of connecting column 124 and connecting column 123 both adopt a conical surface design, when the two floor slab bodies 1 are spliced, the connecting column 123 automatically adjusts its relative position under the action of horizontal thrust. Even if there is some installation deviation between the two floor slab bodies 1, the conical surface can guide the connecting column 124 to slide along the axis of sleeve 121 and the connecting column 123 to slide along the axis of through hole 122 through the inclined surface sliding, thus preventing deformation or jamming of the components due to hard collisions.

[0033] During this process, the butt end of the U-shaped steel bar 23 in the left floor slab body 1 passes through the groove 1 211 and enters the placement cavity 213 in the connection box 1 21, and the butt end of the U-shaped steel bar 23 in the right floor slab body 1 passes through the groove 2 221 and enters the placement cavity 213 in the connection box 2 22. During this process, since the cavity depth inside the placement cavity 213 adopts a gradual design, the placement cavity 213 close to the outside is deeper, and the placement cavity 213 close to the inner fixing block 244 is shallower (looking from the outside of the floor slab body 1 to the inside, the bottom of the inner wall of the placement cavity 213 gradually rises, forming an upward sloping surface, and the top of the inner wall of the placement cavity 213 gradually lowers, forming a downward sloping surface), which can play a guiding role for the U-shaped steel bar 23. When the butt end of the U-shaped steel bar 23 is from the outside of the placement cavity 213, the placement cavity 213 is placed in the right floor slab body 1. During side entry insertion, since the depth of the entrance end of placement cavity 213 is greater than the height of U-shaped rebar 23, U-shaped rebar 23 can freely enter placement cavity 213. However, as the insertion depth increases, the depth of placement cavity 213 gradually decreases, and the outer cylindrical surface of U-shaped rebar 23 will simultaneously contact the upper inclined surface at the bottom of the inner wall and the lower inclined surface at the top of the inner wall. The normal force of the two inclined surfaces forms a clamping effect, forcing the U-shaped rebar 23 to align with the central axis of placement cavity 213, compensating for the vertical installation deviation of the two floor slab bodies 1. By using the double inclined surface constraint of the gradually varying depth of placement cavity 213, automatic centering of the U-shaped rebar 23 after insertion is achieved, without the need for manual adjustment, meeting the needs of fast splicing of prefabricated buildings.

[0034] As the two adjacent floor slab bodies 1 gradually approach, the depth of the butt end of the U-shaped steel bar 23 entering the placement cavity 213 gradually increases, and the outer edges of the pressure blocks 242 adopt arc transitions, which can actively guide the U-shaped steel bar 23 to slide into the embracing area until the outer circumferential surface of the butt end of the U-shaped steel bar 23 is completely in contact with the concave arc surface of the pressure block 242. The cylindrical surface of the vertical part of the butt end of the U-shaped steel bar 23 first contacts the outer side surface of the concave arc surface of the pressure block 242, and uses the side guidance to force the pressure block 242 to overcome the pre-tightening force of the torsion spring 243 and rotate ninety degrees toward the inside of the placement cavity 213 around the rotating rod. The concave arc surface of the pressure block 242 gradually embraces the vertical part of the butt end of the U-shaped steel bar 23, forming a semi-encircling constraint.

[0035] As the two adjacent floor slab bodies 1 continue to approach, the pressing block 242 rotates under the pressure of the U-shaped steel bar 23. During this process, the clamping blocks 245 fixed at the upper and lower ends of the pressing block 242 rotate along with it. The outer surface of the clamping block 245 has a groove that meshes with the outer groove of the fixed block 244. The grooves and grooves on the outer surfaces of the clamping block 245 and the fixed block 244 are all arc-shaped paths centered on the rotation axis. The grooves on the outer surface of the clamping block 245 mesh with the outer surface of the fixed block 244. Due to the teeth and inclined groove wall design of the groove body and the groove, the squeezing force of the teeth on the groove is divided into a direction along the depth of the placement cavity 213 and a direction perpendicular to the depth of the placement cavity 213. The squeezing force forces the clamping block 245 to embed deeper into the groove. The self-locking effect of the inclined surface prevents the clamping block 245 from retreating. Finally, the teeth of the groove on the outer surface of the clamping block 245 fully mesh with the outer surface of the fixed block 244, forming a mechanical locking fixation.

[0036] In this state, the embedded module 2 on the right side of the left floor slab body 1 is engaged with the embedded module 2 on the left side of the right floor slab body 1, and the multiple connection boxes 1 21 and 2 22 are locked. At this time, the depth of the placement cavity 213 is equal to the height of the vertical portion of the butt end of the U-shaped steel bar 23. The inclined surfaces at the top and bottom of the inner wall of the placement cavity 213 squeeze the U-shaped steel bar 23, preventing it from moving further inward of the placement cavity 213. At the same time, the semi-circular clamping of the pressure block 242 is used to limit the horizontal position of the U-shaped steel bar 23 in the placement cavity 213 and align it vertically, ensuring the stability of the subsequent force transmission path.

[0037] The process of locking the matching embedded modules 2: From the side of the floor slab 1 closest to the sleeve 121 (the rear side), push the connecting column 124 located in the rearmost sleeve 121 forward. Initially, the stopper 125 is located within the contraction groove 1241 defined on the outer surface of the connecting column 124, and the spring 126 is contracted. As the connecting column 124 is pushed forward, the tapered portion of the outer end of the connecting column 124 enters the through-hole 122, where it mates with the rear end of the connecting column 123 inside the through-hole 122. This pushes the connecting column 123 further to the preceding set of embedded modules 2, causing the connecting columns 124 and 123 within multiple embedded modules 2 to move forward simultaneously. Taking the last group of embedded modules 2 as an example, the connecting column 124 pushes the connecting column 123 into the interior of the previous sleeve 121 (the connecting column 124 only moves axially inside the sleeve 121 and does not rotate). At this time, the limit block 125 reaches the interior of the protrusion 212. The limit block 125 adopts a cylindrical structure with an arc-shaped outer end, which fits against the inner wall of the through hole 122 until the front end of the connecting column 124 is flush with the rear end of the previous sleeve 121. The limit block 125 reaches the position of the limit groove 127. Under the action of the spring 126, the limit block 125 slides in the contraction groove 1241 toward the interior of the limit groove 127 until the outer end of the limit block 125 fits against the inner wall surface of the limit groove 127.

[0038] At this time, the limit block 125 is radially constrained by the limit groove 127 and cannot be retracted into the contraction groove 1241, thereby axially locking the connecting column 124 in the current position, forming a snap-fit ​​fixed structure. This structure can withstand the tension and pressure along the axial direction of the connecting column 124, effectively preventing the connecting column 124 from slipping or falling off during subsequent construction or use, and providing a stable axial constraint for the connection of multiple floor slab bodies 1. In this state, the connecting column 124 is snap-fitted and fixed to the adjacent embedded modules 2 through the limit block 125, and the protrusion 1 212 in the mutually matching connecting box 1 21 is connected to the protrusion 2 222 in the adjacent connecting box 2 22 through the connecting column 124.

[0039] Finally, the rearmost connecting column 124 is welded to the rearmost sleeve 121, and the frontmost connecting column 124 is welded to the frontmost protrusion 1 212. A pressure pump is then used to inject micro-expansion grouting material into the left placement cavity 213 through the through pipe 25. Since both protrusion 1 212 and protrusion 2 222 have connecting grooves 26 inside, they can be used to connect the interiors of the two placement cavities 213. The grout flows into the right placement cavity 213 through the connecting grooves 26. Excess grout flows through the gaps between groove 1 211 and protrusion 2 222, and between groove 2 221 and protrusion 1 212, and then into the concave seam 11, filling the gaps and improving waterproof performance.

[0040] In summary, the reinforced concrete load-bearing floor structure has the following advantages: Advantage 1. In the prior art, conventional straight steel bars are only spliced ​​together by aligning the ends or simply cross-lapping to form loose contact. No mechanical locking structure is set up. Before concrete is poured, they rely entirely on gravity or temporary manual binding to maintain relative position. They lack self-locking or mechanical bite functions and cannot form a temporary stable structure. During the construction phase, they are easily displaced due to hoisting vibration, wind or vibration impact, resulting in hidden quality defects such as insufficient lap length and angle deviation. This not only increases rework costs, but also buries structural safety hazards. However, the present invention uses pre-embedded modules 2 to complete the precise assembly of connectors 24, U-shaped steel bars 23, and locking parts 12 during the prefabrication stage, so that the floor slab body 1 can be spliced ​​to form a rigid temporary locking structure before concrete is poured. During on-site docking, after the U-shaped steel bar 23 enters the placement cavity 213, it is first forced to be centered by the double bevels of gradually varying depths. Later, during the process of continued insertion, the pressing block 242 is subjected to the extrusion torque of the outer circle of the U-shaped steel bar 23 to overcome the pre-tightening force of the torsion spring 243 and rotate ninety degrees, forming a semi-circular embrace with the concave arc surface, completing radial self-locking; synchronously, the clamping block 245 slides into the arc-shaped clamping groove of the fixed block 244 as it rotates, and the inclined teeth are self-locking, forming an axially irreversible clamping. The three are superimposed to form a double mechanical locking in the horizontal and vertical directions, and the docking state can be maintained without any external temporary support. This structure achieves the designed positioning accuracy before the concrete is poured, eradicating the stubborn problems of steel bar misalignment and casting displacement in traditional construction. Ensure the correct relative position of the steel bars during the construction phase, completely avoid the risk of displacement of traditional straight steel bars, and provide a precise force transmission foundation for subsequent concrete pouring.

[0041] Advantage 2: The inclined surface design of the ends of protrusion 1 212 and protrusion 2 222 can compensate for horizontal installation errors within a specified range; the conical surfaces of connecting column 124 and connecting column 123 are automatically aligned through the inclined sliding guide component to avoid hard collisions; the double-inclined surface structure of the placement cavity 213 with a gradual depth can form a clamping effect on the U-shaped steel bar 23, forcing the U-shaped steel bar 23 to align vertically with the central axis of connecting box 1 21 or connecting box 2 22, compensating for vertical deviations within a specified range; the arc transition edge of the pressure block 242 actively guides the U-shaped steel bar 23 to slide into the engagement area. The above-mentioned synergistic effect improves the installation accuracy tolerance of the splicing of the floor slab body 1, and can achieve fast and accurate docking without the need for high-precision prefabricated molds and complex positioning equipment, meeting the core requirements of efficient construction of prefabricated buildings and fundamentally avoiding hidden cracks caused by forced correction.

[0042] Advantage three: The embedded module 2 of the present invention and the floor slab body 1 are prefabricated in an integrated manner. The embedded ends of the U-shaped steel bars 23 pass through the connecting box 1 21 and the connecting box 2 22 and are tied and fixed to the load-bearing steel bars of the floor slab body 1 to form an integral load-bearing skeleton. The bond strength between the concrete and the steel bars is utilized to efficiently transfer the external load to the concrete structure, thereby improving the anchoring performance between the steel bars and the concrete, effectively preventing the steel bars from being pulled out of the concrete, thereby ensuring the safety and stability of the entire structure, and completely replacing the quality dispersion and construction delays caused by post-planting steel bars or repair welding on site. The butt ends of the U-shaped steel bars 23 can be spliced ​​at the factory, reducing on-site secondary processing. Compared with traditional loose reinforcement, the overall stiffness and transportation crack resistance of the floor slab body 1 are significantly enhanced.

[0043] Advantage 4: In locking member 12, by pushing connecting column 124 from the rear side of sleeve 121, connecting column 124 pushes connecting column 123 forward synchronously, and stop block 125 automatically springs into stop slot 127, achieving axial locking. This axial locking can expand with the floor slab body 1, providing continuous axial restraint, resisting repeated tensile and compressive loads, and improving the overall stability of the joint under temperature fluctuations or earthquakes.

[0044] Advantage 5: By welding the rearmost connecting column 124 to the corresponding sleeve 121 and the frontmost connecting column 124 to the corresponding protrusion 212, a rigid closed-loop constraint can be formed on the basis of mechanical locking. The welded node can withstand the persistent tension and shear force along the axial direction of the connecting column 124, avoiding the loosening of the connection between the limit block 125 and the spring 126 due to fatigue failure under long-term load vibration. Compared with the temporary fixation method that simply relies on mechanical engagement, welding fixation enables multiple embedded modules 2 to form a continuous rigid skeleton, which improves the connection strength of adjacent floor slab bodies 1, ensures the geometric stability of the structure within the designed service life, and solves the potential loosening risk of traditional splicing nodes that decay over time.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A reinforced concrete load-bearing floor structure based on a pre-buried structure, characterized in that: include: A floor slab body (1), wherein an embedded module (2) is embedded in the outer surface of the floor slab body (1), a concave slit (11) is provided on the outer side of the floor slab body (1), and a locking member (12) is provided inside the concave slit (11); The embedded module (2) includes a connection box 1 (21) and a connection box 2 (22), and the connection box 1 (21) and the connection box 2 (22) are symmetrically distributed on both sides of the floor slab body (1). One side of the outer surface of the connection box 1 (21) is provided with a groove 1 (211), and one side of the outer surface of the connection box 2 (22) is provided with a groove 2 (221). One side of the outer surface of the connection box 1 (21) is provided with a protrusion 1 (212) that fits with the inner wall surface of the groove 2 (221), and one side of the outer surface of the connection box 2 (22) is provided with a protrusion 1 (212) that fits with the inner wall surface of the groove 1 (211). ) The inner wall surface of the protrusion 2 (222) is fitted with the protrusion 1 (212) and the protrusion 2 (222), and the interior of the protrusion 1 (212) and the protrusion 2 (222) are fixedly connected with U-shaped steel bars (23), and the outer ends of the U-shaped steel bars (23) pass through the connection box 1 (21) and the connection box 2 (22) and extend to the interior of the floor slab body (1), and the connection box 1 (21) and the connection box 2 (22) are provided with a placement cavity (213) on the side away from the U-shaped steel bars (23), and the interior of the placement cavity (213) is provided with a connecting piece (24) for connecting the connection box 1 (21) and the connection box 2 (22).

2. The reinforced concrete load-bearing floor structure based on the embedded structure according to claim 1, characterized in that: The connecting member (24) includes a rotating seat (241) fixedly connected to the bottom of the inner wall of the placement cavity (213), and the rotating seat (241) is rotatably connected to the pressure block (242) via a rotating rod arranged inside the rotating seat (241). The outer surface of the rotating rod is provided with a torsion spring (243) connected to the inside of the pressure block (242), and the outer surface of the pressure block (242) adopts a concave arc design that fits the outer circumferential surface of the U-shaped steel bar (23).

3. The reinforced concrete load-bearing floor structure based on the embedded structure according to claim 2, characterized in that: A fixing block (244) is fixedly connected to the inner wall surface of the placement cavity (213), and two fixing blocks (244) are provided and are symmetrically distributed up and down with the pressing block (242) as the center. A card slot is provided on the outer surface of the fixing block (244), and a card block (245) engaged with the outer surface of the card slot is fixedly connected to the upper and lower sides of the pressing block (242).

4. The reinforced concrete load-bearing floor structure based on the embedded structure according to claim 3, characterized in that: The placement cavity (213) is respectively connected to the interior of groove 1 (211) and groove 2 (221). The inner wall cavity of the placement cavity (213) adopts a depth gradient design, and the lowest point of the inner wall cavity depth of the placement cavity (213) is close to one side of the fixing block (244).

5. The reinforced concrete load-bearing floor structure based on the embedded structure according to claim 1, characterized in that: The locking member (12) includes a sleeve (121) fixedly connected to the outer surface of the second protrusion (222), the interior of the sleeve (121) is connected to the interior of the second groove (221), a through hole (122) is provided inside the first protrusion (212), a connecting column (123) is slidably connected to the circumferential inner wall of the through hole (122), and a connecting column (124) is slidably connected to the circumferential inner wall of the sleeve (121).

6. The reinforced concrete load-bearing floor structure based on the embedded structure according to claim 5, characterized in that: The outer circumferential surface of the connecting column (124) is provided with a contraction groove (1241), the interior of the contraction groove (1241) is slidably connected to a limit block (125), the bottom end of the limit block (125) is provided with a spring (126) connected to the inner wall of the contraction groove (1241), and the interior of the protrusion (212) is provided with a limit groove (127) that fits with the outer surface of the limit block (125).

7. The reinforced concrete load-bearing floor structure based on the embedded structure according to claim 6, characterized in that: The outer ends of the connecting column (123) and the connecting column (124) are both designed with a conical surface, and the outer ends of the first protrusion (212) and the second protrusion (222) are both designed with a bevel surface.

8. The reinforced concrete load-bearing floor structure based on the embedded structure according to claim 7, characterized in that: The upper surface of the connection box 1 (21) is fixedly connected with a through pipe (25), the top end of the through pipe (25) extends to the upper surface of the floor slab body (1), and the insides of the protrusion 1 (212) and the protrusion 2 (222) are both provided with a connecting groove (26).

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