A pre-embedded structure-based reinforced concrete load-bearing floor structure

Abstract

The application relates to the technical field of assembled floor slabs, and discloses a reinforced concrete load-bearing floor slab structure based on a pre-buried structure, which comprises a floor slab body, a plurality of floor slab bodies are arranged, a pre-buried module is embedded on the outer surface of the floor slab body, a concave joint is arranged on the outer side of the floor slab body, and a locking piece is arranged in the concave joint; wherein the pre-buried module comprises a connecting box one and a connecting box two. The reinforced concrete load-bearing floor slab structure based on the pre-buried structure can effectively solve the problem that, in the prior art, the pre-buried steel bars of a prefabricated floor slab are usually linear, the overlapping of the pre-buried linear steel bars completely depends on the force transmission of post-concreting, however, the concrete at the joint cannot be fully vibrated and compacted, honeycomb and cavities are prone to occurring, under the action of subsequent loads, the steel bars and the concrete can be peeled off, and even the floor slab can face the problem of single-board falling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fabricated floor, in particular to a reinforced concrete load-bearing floor structure based on pre-embedded structure. BACKGROUND

[0002] In the field of construction, reinforced concrete load-bearing floor, as a key component of building structure, bears the important responsibility of transmitting vertical load and horizontal force and ensuring structural stability. With the promotion of prefabricated buildings, prefabricated reinforced concrete floor has been widely used due to its advantages of efficient construction and controllable quality.

[0003] In the prior art, the pre-embedded steel bars of the prefabricated floor are usually linear. When multiple floors are spliced, the overlapping of the pre-embedded linear steel bars completely depends on the force transmission of the later poured concrete. However, the concrete at the joint cannot be fully vibrated and compacted, which is prone to honeycomb and cavities. Under the action of subsequent load, the steel bars and concrete will be peeled off, and even the floor may face the risk of single board falling off. SUMMARY

[0004] In view of the above shortcomings of the prior art, the present application provides a reinforced concrete load-bearing floor structure based on pre-embedded structure, which can effectively solve the problem that in the prior art, the pre-embedded steel bars of the prefabricated floor are usually linear, and when multiple floors are spliced, the overlapping of the pre-embedded linear steel bars completely depends on the force transmission of the later poured concrete. However, the concrete at the joint cannot be fully vibrated and compacted, which is prone to honeycomb and cavities. Under the action of subsequent load, the steel bars and concrete will be peeled off, and even the floor may face the risk of single board falling off.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme:

[0006] The present application provides a reinforced concrete load-bearing floor structure based on pre-embedded structure, comprising:

[0007] a plurality of floor bodies, the outer surface of the floor body is embedded with a pre-embedded module, the outer side of the floor body is provided with a concave joint, and the inside of the concave joint is provided with a locking piece;

[0008] The pre-embedded module comprises a connecting box one and a connecting box two, the connecting box one and the connecting box two are symmetrically distributed on both sides of the floor body, a groove one is formed in one side of the outer surface of the connecting box one, a groove two is formed in one side of the outer surface of the connecting box two, a protruding block one is arranged on one side of the outer surface of the connecting box one and is in close contact with the inner wall surface of the groove two in the adjacent floor body, a protruding block two is arranged on one side of the outer surface of the connecting box two and is in close contact with the inner wall surface of the groove one in the adjacent floor body, the protruding block one and the protruding block two are fixedly connected with U-shaped steel bars, the outer ends of the U-shaped steel bars penetrate through the connecting box one and the connecting box two and extend into the floor body, and placing cavities are formed in the sides, away from the U-shaped steel bars, of the connecting box one and the connecting box two.

[0009] Further, the connecting piece comprises a rotating seat fixedly connected with the inner wall bottom of the placing cavity, the rotating seat is rotationally connected with a pressing block through a rotating rod arranged in the rotating seat, the outer surface of the rotating rod is provided with a torsional spring connected with the inside of the pressing block, and the outer surface of the pressing block is designed as a concave arc in close contact with the circumferential outer surface of the U-shaped steel bar.

[0010] Further, the inner wall surface of the placing cavity is fixedly connected with a fixed block, the fixed block is arranged in two and symmetrically distributed above and below the pressing block, the outer surface of the fixed block is provided with a clamping groove, and the upper and lower sides of the pressing block are fixedly connected with clamping blocks engaged with the outer surface of the clamping groove.

[0011] Further, the placing cavity is in communication with the inside of the groove one and the groove two respectively, the inner wall cavity of the placing cavity is designed in a depth gradient manner, and the lowest point of the inner wall cavity depth of the placing cavity is close to the side of the fixed block one.

[0012] Further, the locking piece comprises a sleeve fixedly connected with the outer surface of the protruding block two, the inside of the sleeve is in communication with the inside of the groove two, the inside of the protruding block one is provided with a through hole, the circumferential inner wall of the through hole is slidingly connected with a connecting column, and the circumferential inner wall of the sleeve is slidingly connected with a connecting column.

[0013] Further, the circumferential outer surface of the connecting column is provided with a contraction groove, the inside of the contraction groove is slidingly connected with a limiting block, the bottom end of the limiting block is provided with a spring connected with the inner wall of the contraction groove, and the inside of the protruding block one is provided with a limiting groove in close contact with the outer surface of the limiting block.

[0014] Further, the outer ends of the connecting column and the connecting column are designed as conical surfaces, and the outer ends of the protruding block one and the protruding block two are designed as inclined surfaces.

[0015] Further, the upper surface of the connecting box one is fixedly communicated with a through pipe, the top end of the through pipe extends to the upper surface of the floor body, and the interiors of the protruding block one and the protruding block two are both provided with a communicating groove.

[0016] Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

[0017] The application is provided with a pre-buried module, a floor body and a locking piece, and the precise assembly of the connecting piece, the U-shaped steel bar and the locking piece is completed in the prefabrication stage, so that the floor body can form a rigid temporary locking structure before being spliced with the un-poured concrete. When the U-shaped steel bar enters the placement cavity, it is first forced to be centered by the double inclined surfaces with gradually changing depths. Then, during the process of continuous insertion, the pressing block is rotated by 90 degrees against the torsional spring pre-tightening force to form a semi-ring embrace with the concave arc surface, and the radial self-locking is completed; at the same time, the clamping block is slid into the arc-shaped clamping groove of the fixed block, the inclined teeth are self-locked, and the axial irreversible clamping is formed. The three are superimposed to form double mechanical locking in the horizontal and vertical directions, and the butt joint state can be maintained without any external temporary support. The structure reaches the design positioning accuracy before the concrete is poured, and the problems of steel bar misalignment and pouring displacement in the traditional construction are eliminated. The relative position of the steel bar in the construction stage is ensured to be correct, and the displacement risk of the traditional straight steel bar is completely avoided, thereby providing a precise force transmission foundation for the subsequent concrete pouring. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the embodiment of the application;

[0020] Figure 2 It is a structure schematic diagram of two floor bodies separated in the embodiment of the application;

[0021] Figure 3 It is a structure schematic diagram of the floor body, the connecting box one and the connecting box two in the embodiment of the application;

[0022] Figure 4 It is a structure schematic diagram of the connecting box one and the connecting box two in the embodiment of the application;

[0023] Figure 5 It is a cross-sectional structure schematic diagram of the locking piece in the embodiment of the application;

[0024] Figure 6Another angle cross-section structure schematic view of the connecting box one and the connecting box two of the embodiment of the present application;

[0025] Figure 7 Structure schematic view of the protruding block one and the protruding block two of the embodiment of the present application;

[0026] Figure 8 Structure schematic view of the embodiment of the present application Figure 7 Structure schematic view of the local amplification at A of the embodiment of the present application;

[0027] Figure 9 Structure schematic view of the connecting box one, the connecting box two, the rotating seat, the pressing block, the connecting column and the connecting column of the embodiment of the present application.

[0028] The reference signs in the figure respectively represent: 1, floor body; 11, concave joint; 12, locking piece; 121, sleeve; 122, through hole; 123, connecting column; 124, connecting column; 1241, contraction groove; 125, limiting block; 126, spring; 127, limiting groove; 2, pre-buried module; 21, connecting box one; 211, groove one; 212, protruding block one; 213, placing cavity; 22, connecting box two; 221, groove two; 222, protruding block two; 23, U-shaped steel; 24, connecting piece; 241, rotating seat; 242, pressing block; 243, torsional spring; 244, fixed block; 245, clamping block; 25, through pipe; 26, communication groove. DETAILED DESCRIPTION

[0029] To make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all the embodiments. Based on the embodiment in the present application, all the other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the present application.

[0030] The present application will be further described below in combination with the embodiment.

[0031] Embodiment:

[0032] Please refer to Figures 1-9 The present application provides a technical scheme: a reinforced concrete load-bearing floor structure based on a pre-buried structure, comprising:

[0033] The floor body 1 is provided with a plurality of floor bodies 1, the plurality of floor bodies 1 are linearly arrayed, the outer surface of the floor body 1 is embedded with a pre-buried module 2, the outer side of the floor body 1 is provided with a concave joint 11, and the inside of the concave joint 11 is provided with a locking piece 12;

[0034] The pre-embedded module 2 comprises a connecting box one 21 and a connecting box two 22, the connecting box one 21 and the connecting box two 22 are symmetrically distributed on both sides of the floor body 1, the connecting box one 21 and the connecting box two 22 are provided with a plurality of connecting boxes, a groove one 211 is formed on one side of the outer surface of the connecting box one 21, a groove two 221 is formed on one side of the outer surface of the connecting box two 22, a protruding block one 212 is arranged on one side of the outer surface of the connecting box one 21 and is in close contact with the inner wall surface of the groove two 221 in the adjacent floor body 1, a protruding block two 222 is arranged on one side of the outer surface of the connecting box two 22 and is in close contact with the inner wall surface of the groove one 211 in the adjacent floor body 1, the protruding block one 212 and the protruding block two 222 are fixedly connected with a U-shaped steel bar 23 in the inside, the outer end of the U-shaped steel bar 23 penetrates through the connecting box one 21 and the connecting box two 22 and extends to the inside of the floor body 1, a placing cavity 213 is formed on the side, away from the U-shaped steel bar 23, of the connecting box one 21 and the connecting box two 22, and a connecting piece 24 for combining the connecting box one 21 and the connecting box two 22 is arranged in the inside of the placing cavity 213.

[0035] The connecting piece 24 comprises a rotating seat 241 fixedly connected with the inner wall bottom of the placing cavity 213, the rotating seat 241 is rotationally connected with a pressing block 242 through a rotating rod arranged in the inside of the rotating seat 241, the outer surface of the rotating rod is provided with a torsional spring 243 connected with the inside of the pressing block 242, and the outer surface of the pressing block 242 is designed as a concave arc in close contact with the circumferential outer surface of the U-shaped steel bar 23.

[0036] The inner wall surface of the placing cavity 213 is fixedly connected with a fixing block 244, the fixing block 244 is provided with two fixing blocks and is symmetrically distributed above and below the pressing block 242 as the center, the outer surface of the fixing block 244 is provided with a clamping groove, and the upper and lower sides of the pressing block 242 are fixedly connected with clamping blocks 245 in mesh with the outer surface of the clamping groove.

[0037] The placing cavity 213 is in communication with the inside of the groove one 211 and the groove two 221 respectively, the inner wall cavity of the placing cavity 213 is designed in a depth gradient type, and the lowest point of the inner wall cavity depth of the placing cavity 213 is close to the side of the fixing block 244.

[0038] The locking piece 12 comprises a sleeve 121 fixedly connected with the outer surface of the protruding block two 222, the inside of the sleeve 121 is in communication with the inside of the groove two 221, the inside of the protruding block one 212 is provided with a through hole 122, the circumferential inner wall of the through hole 122 is slidingly connected with a connecting column 123, and the circumferential inner wall of the sleeve 121 is slidingly connected with the connecting column 124.

[0039] The circumferential outer surface of the connecting column 124 is provided with a contraction groove 1241, the inside of the contraction groove 1241 is slidingly connected with a limiting block 125, the bottom end of the limiting block 125 is provided with a spring 126 connected with the inner wall of the contraction groove 1241, and the inside of the protruding block one 212 is provided with a limiting groove 127 in close contact with the outer surface of the limiting block 125.

[0040] The outer end of the connecting column 124 and the adapter column 123 are designed with a tapered surface, and the outer end of the protrusion one 212 and the protrusion two 222 are designed with an inclined surface.

[0041] The upper surface of the connecting box one 21 is fixedly communicated with a through pipe 25, the top end of the through pipe 25 extends to the upper surface of the floor body 1, and the inner part of the protrusion one 212 and the protrusion two 222 are both provided with a communicating groove 26.

[0042] In the conventional straight reinforcing steel, only the end alignment or simple cross-lapping is used to form a loose contact in splicing, and no mechanical locking structure is provided. At this time, if the concrete is not poured, the reinforcing steels only rely on the gravity or artificial temporary binding to maintain the relative position, lack of self-locking or mechanical engagement function, and cannot form a temporary stable structure before pouring, and displacement is prone to occur during the construction stage.

[0043] Prefabrication stage:

[0044] In actual application, the connecting box one 21 and the connecting box two 22 are both pre-installed with the connecting piece 24, the adapter column 123 is placed in the through hole 122, the connecting column 124 is placed in the sleeve 121, and the connecting box one 21 and the connecting box two 22 are both embedded with the U-shaped reinforcing steel 23 in advance. In the mold of the prefabrication factory, a plurality of connecting box one 21 is fixed on one side of the mold for manufacturing the floor body 1, and a plurality of connecting box two 22 is fixed on the other side of the mold for manufacturing the floor body 1, to ensure that the two are symmetrically distributed on the two side edges of the floor body 1, and the protrusion one 212 and the protrusion two 222 are towards the outside of the mold, and the concave joint 11 of the side surface of the floor body 1 is formed through the side mold.

[0045] The inner part of the floor body 1 is also embedded with the force-bearing reinforcing steel and the connecting reinforcing steel, the embedded end of the U-shaped reinforcing steel 23 penetrates through the connecting box one 21 and the connecting box two 22, and extends to the inner part of the floor body 1, and is fixed with the force-bearing reinforcing steel of the floor body 1 by binding, to form an integral force-bearing framework (the abutting end of the U-shaped reinforcing steel 23 is located in the placement cavity 213 of the connecting box one 21 and the connecting box two 22 in the subsequent abutting process, and when the adjacent floor body 1 is abutted, the end is attached to the concave arc surface of the abutting block 242 in the placement cavity 213 of the other floor body 1, to realize the tight locking through the connecting piece 24). The embedded end of the U-shaped reinforcing steel 23 is anchored in the concrete member of the floor body 1, and the external load is transmitted to the concrete structure by using the gripping force between the concrete and the reinforcing steel. The anchoring performance between the reinforcing steel and the concrete can be improved, the reinforcing steel is prevented from being pulled out of the concrete, and the safety and stability of the structure as a whole are ensured.

[0046] The concrete is poured into the mold, vibrated and compacted, and cured to the designed strength, so that the embedded module 2 and the floor body 1 form an integral whole that cannot be separated, and the forming of the concave joint 11 is completed synchronously.

[0047] The process of butt joint of multiple floor bodies 1:

[0048] The floor body 1 is hoisted to the design elevation by the tower crane, the levelness is adjusted by the level, the two adjacent floor bodies 1 are in the same horizontal plane, and the construction gap is reserved. The mold side plate fixed with multiple embedded modules 2 is removed, in this state, the connecting piece 24 inside the placing cavity 213 is in the open state. Two rotating seats 241 are fixedly connected to the inner wall surface of each placing cavity 213, the two rotating seats 241 are symmetrically distributed on the upper and lower sides of the abutting block 242, the abutting block 242 is rotatably connected with the outer side of the rotating seat 241 through the rotating shaft arranged in the inner side thereof, under the action of the torsional spring 243, the concave arc on the outer surface of the abutting block 242 faces the outer side of the floor body 1, and a pre-opening posture in the splicing direction is formed.

[0049] Taking one of the floor bodies 1 (left side) as a reference, the other floor body 1 (right side) is pushed to move horizontally, so that the protrusion one 212 of the right floor body 1 is inserted into the recess two 221 of the left floor body 1, and the protrusion two 222 of the left floor body 1 is inserted into the recess one 211 of the right floor body 1; the inclined surface at the end of the protrusion one 212 and the protrusion two 222 guides automatic alignment, which can compensate for installation error. Since the outer ends of the connecting column 124 and the connecting column 123 are designed in a conical surface, when the two floor bodies 1 are spliced, the connecting column 124 and the connecting column 123 automatically adjust the relative position under the action of horizontal thrust, that is, even if there is some installation deviation between the two floor bodies 1, the conical surface can also guide the connecting column 124 to slide along the sleeve 121 axis and the connecting column 123 to slide along the through hole 122 axis, so that deformation or jamming of the components caused by hard collision is avoided.

[0050] In this process, the butt joint end of the U-shaped steel bar 23 in the left floor body 1 passes through the groove one 211 into the placement cavity 213 in the connecting box one 21, and the butt joint end of the U-shaped steel bar 23 in the right floor body 1 passes through the groove two 221 into the placement cavity 213 in the connecting box two 22. In this process, since the cavity depth inside the placement cavity 213 adopts a gradual design, the depth of the placement cavity 213 near the outer side is deeper, and the depth of the placement cavity 213 near the inner side of the fixed block 244 is shallower (from the outer side of the floor body 1, the inner wall bottom of the placement cavity 213 gradually rises, which is an upward inclined slope, and the inner wall top of the placement cavity 213 gradually lowers, which is a downward inclined slope), which can guide the U-shaped steel bar 23. When the butt joint end of the U-shaped steel bar 23 is inserted from the outside of the placement cavity 213, since the depth of the entrance end of the placement cavity 213 is greater than the height of the U-shaped steel bar 23, the U-shaped steel bar 23 can freely enter the placement cavity 213, but as the insertion depth increases, the depth of the placement cavity 213 gradually decreases, and the outer cylindrical surface of the U-shaped steel bar 23 will simultaneously contact the upward inclined surface of the inner wall bottom and the downward inclined surface of the inner wall top. The normal force of the two inclined surfaces forms a clamping effect, forcing the U-shaped steel bar 23 to align with the central axis of the placement cavity 213, compensating for the installation deviation of the two floor bodies 1 in the vertical direction. Through the double-slope constraint of the gradual depth of the placement cavity 213, automatic centering of the U-shaped steel bar 23 after insertion is achieved, without the need for manual adjustment, meeting the needs of rapid assembly of prefabricated buildings.

[0051] As the two adjacent floor bodies 1 gradually approach, the depth of the butt joint end of the U-shaped steel bar 23 into the placement cavity 213 gradually increases, and the outer edge of the abutting block 242 adopts a circular arc transition, which can actively guide the U-shaped steel bar 23 to slide into the embracing area until the butt joint end of the U-shaped steel bar 23 is in complete contact with the concave circular arc surface of the abutting block 242. The cylindrical surface of the vertical part of the butt joint end of the U-shaped steel bar 23 first contacts the outer side of the concave circular arc surface of the abutting block 242, using side guidance to force the abutting block 242 to overcome the pre-tightening force of the torsional spring 243 and rotate ninety degrees inside the placement cavity 213. The concave circular arc surface of the abutting block 242 gradually embraces the vertical part of the butt joint end of the U-shaped steel bar 23, forming a semi-loop embrace constraint.

[0052] Two adjacent floor bodies 1 continue to approach, the pressing block 242 is rotated under the extrusion of the U-shaped steel 23, in this process, the clamping block 245 fixed on the upper and lower ends of the pressing block 242 rotates together, the outer surface of the clamping block 245 is provided with a groove body meshing with the clamping groove on the outer surface of the fixed block 244, and the paths of the clamping groove and the groove body on the outer surfaces of the clamping block 245 and the fixed block 244 are both arc trajectories with the rotation shaft as the center. The groove body on the outer surface of the clamping block 245 meshes with the clamping groove on the outer surface of the fixed block 244, due to the design of the teeth and the inclined surface of the groove wall of the groove body and the clamping groove, the extrusion force of the teeth on the clamping groove is decomposed into the depth direction of the placement cavity 213 and perpendicular to the depth direction of the placement cavity 213, the extrusion force forces the clamping block 245 to embed into the clamping groove, and through the self-locking effect of the inclined surface, the clamping block 245 is prevented from returning, finally, the teeth of the groove body on the outer surface of the clamping block 245 completely mesh with the clamping groove on the outer surface of the fixed block 244, forming mechanical clamping and fixing.

[0053] In this state, the pre-embedded module 2 on the right side of the left floor body 1 is clamped with the pre-embedded module 2 on the left side of the right floor body 1, and the plurality of connection boxes one 21 and the connection boxes two 22 form a locked state. At this time, the depth of the placement cavity 213 is equal to the height of the vertical part of the butt joint end of the U-shaped steel 23, the inclined surfaces on the top and bottom of the inner wall of the placement cavity 213 extrude the U-shaped steel 23, so that it cannot continue to move to the inside of the placement cavity 213, at the same time, cooperating with the half-ring-like holding of the pressing block 242, the U-shaped steel 23 is limited in the horizontal direction and centered in the vertical direction in the placement cavity 213, ensuring the stability of the subsequent force transmission path.

[0054] The process of locking the mutually matched pre-embedded modules 2 is as follows:

[0055] From the side of the floor body 1 close to the sleeve 121 (rear side), the connecting column 124 located in the last side sleeve 121 is pushed forward. In the initial state, the limiting block 125 is inside the contraction groove 1241 opened on the outer surface of the connecting column 124, and the spring 126 is in the contraction state. As the connecting column 124 advances forward, the tapered part at the outer end of the connecting column 124 enters the through hole 122 and fits with the rear end of the connecting column 123 inside the through hole 122, thereby further pushing the connecting column 123 to the front of the previous embedded module 2. The connecting column 124 and the connecting column 123 in the plurality of embedded modules 2 move forward at the same time. Taking the last group of embedded modules 2 as an example, the connecting column 124 pushes the connecting column 123 into the inside of the previous sleeve 121 (the connecting column 124 only moves axially in the sleeve 121 and does not rotate), at this time, the limiting block 125 reaches the inside of the protrusion 212, the limiting block 125 adopts a column structure, the outer end is arc-shaped, and is fitted with 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 limiting block 125 reaches the position of the limiting groove 127 and slides into the limiting groove 127 under the action of the spring 126 until the outer end of the limiting block 125 is fitted with the inner wall surface of the limiting groove 127.

[0056] At this time, the limiting block 125 is radially constrained by the limiting groove 127 and cannot be retracted into the contraction groove 1241, thereby axially locking the connecting column 124 at the current position to form a clamping and fixing structure. This structure can withstand axial tension and pressure of the connecting column 124 and effectively prevent the connecting column 124 from slipping or falling during subsequent construction or use, thereby providing stable axial constraint for the combination of the plurality of floor bodies 1. In this state, the connecting column 124 realizes the clamping and fixing of the adjacent embedded modules 2 through the limiting block 125, and the protrusion 212 in the matching connecting box 21 and the protrusion 222 in the adjacent connecting box 22 are combined through the connecting column 124.

[0057] Finally, the last connecting column 124 and the last sleeve 121 are welded and fixed, and the frontmost connecting column 124 and the frontmost protrusion 212 are welded and fixed. The pressure pump is used to inject micro-expanding grouting material into the left placement cavity 213 from the through pipe 25. Since the internal of the protrusion 212 and the protrusion 222 are both provided with a communication groove 26, the two placement cavities 213 can be communicated, the grouting material enters the right placement cavity 213 through the communication groove 26, and the excess grouting material reaches the inside of the concave joint 11 through the gap between the protrusion 212 and the protrusion 222, the gap between the protrusion 222 and the protrusion 212, and the concave joint 11, thereby filling the gap and improving the waterproof performance.

[0058] In summary, the reinforced concrete load-bearing floor structure has the following advantages:

[0059] Advantage one, in the prior art, when conventional straight reinforcing steel bars are spliced, only end alignment or simple cross-lapping is used to form loose contact, and no mechanical locking structure is provided. Before pouring of concrete, the relative position is completely dependent on gravity or temporary manual binding, and lacks self-locking or mechanical engagement function, so that a temporary stable structure cannot be formed. During construction, displacement is likely to occur due to hoisting vibration, wind force or vibration impact, resulting in hidden quality defects such as insufficient lap length and angle deviation, which not only increases the cost of rework, but also causes structural safety hazards. The present application, through the pre-embedded module 2, completes the precise assembly of the connecting piece 24, the U-shaped reinforcing steel bar 23 and the locking piece 12 during the prefabrication stage, so that the floor body 1 can form a rigid temporary locking structure before the pouring of concrete. When the U-shaped reinforcing steel bar 23 is placed in the cavity 213, it is first forced to be centered by the gradually deepening double bevel. Then, during the process of continuous insertion, the pressing block 242 is rotated by 90 degrees to form a semi-ring embrace with the concave arc surface, overcoming the torsional spring 243 pre-tightening force under the extrusion moment of the outer circle of the U-shaped reinforcing steel bar 23, and completing the radial self-locking. At the same time, the clamping block 245 slides into the arc-shaped clamping groove of the fixed block 244, and the bevel teeth are self-locked, forming an irreversible clamping in the axial direction. The three are superimposed to form a double mechanical locking in the horizontal and vertical directions, and no external temporary support is needed to maintain the docking state. The structure reaches the design positioning accuracy before the pouring of concrete, and eliminates the problems of steel bar misalignment and pouring displacement in traditional construction. It ensures the correct relative position of the reinforcing steel bars during construction, completely avoids the displacement risk of traditional straight reinforcing steel bars, and provides a precise force transmission foundation for subsequent concrete pouring.

[0060] Advantage two, the end bevel design of the convex block one 212 and the convex block two 222 can compensate for the horizontal installation error within a specified range; the taper surface cooperation of the connecting column 124 and the linking column 123 automatically aligns the parts through the bevel sliding guide, avoiding hard collision; the gradually deepening double bevel structure of the cavity 213 can form a clamping effect on the U-shaped reinforcing steel bar 23, forcing the U-shaped reinforcing steel bar 23 to align with the center axis of the connecting box one 21 or the connecting box two 22 in the vertical direction, compensating for the vertical deviation within a specified range; the arc transition edge of the pressing block 242 actively guides the U-shaped reinforcing steel bar 23 to slide into the embrace area. The above-mentioned synergistic effect improves the installation precision tolerance of the spliced floor body 1, and without the need for high-precision prefabricated molds and complex positioning equipment, it can realize fast and accurate docking, meet the core needs of efficient construction of prefabricated buildings, and fundamentally avoid hidden cracks caused by forced correction.

[0061] Advantage three, the prefabricated module 2 of the application is integrally prefabricated with the floor body 1, the embedded end of the U-shaped steel bar 23 penetrates through the connecting box one 21 and the connecting box two 22 and is fixed with the stress steel bar of the floor body 1, forming an integral stress skeleton. The gripping force between the concrete and the steel bar is utilized to efficiently transfer the external load to the concrete structure, improve the anchoring performance between the steel bar and the concrete, effectively prevent the steel bar from being pulled out of the concrete, thereby ensuring the safety and stability of the structure as a whole, completely replacing the quality dispersion and time delay caused by on-site post-planting steel bars or repair welding. The butt end of the U-shaped steel bar 23 can be spliced after leaving the factory, reducing on-site secondary processing, and compared with the traditional loose splicing of steel bars, the overall stiffness and transport crack resistance of the floor body 1 are significantly enhanced.

[0062] Advantage four, in the locking piece 12, the connecting column 124 is pushed from the rear side of the sleeve 121 to push the connecting column 124 to move forward synchronously, and the limiting block 125 is automatically popped into the limiting groove 127 to realize axial locking. The axial locking can be expanded with the floor body 1 to provide continuous axial constraint ability, resist repeated tensile and compressive loads, and improve the overall stability of the joint under temperature changes or earthquake action.

[0063] Advantage five, by welding the last connecting column 124 and the corresponding sleeve 121, and the frontmost connecting column 124 and the corresponding protrusion one 212, a rigid closed-loop constraint can be formed on the basis of mechanical locking. The welded joint can withstand the persistent tension and shear force along the connecting column 124, avoiding the loosening of the limiting block 125 and the spring 126 due to fatigue failure under long-term load vibration. Compared with the temporary fixing method that simply relies on mechanical clamping, welding fixation enables multiple prefabricated modules 2 to form a continuous rigid skeleton, improves the connection strength of adjacent floor bodies 1, ensures the geometric stability of the structure within the designed service life, and solves the loosening problem of the traditional splicing joint over time.

[0064] The above embodiments are only used to illustrate the technical solutions of the application, but not limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the application.

Claims

1. A pre-embedded structure based reinforced concrete load bearing floor slab structure, characterized by, The utility model relates to a floor slab body (1), the outer surface of floor slab body (1) is embedded with preburied module (2), the outer side of floor slab body (1) is provided with concave joint (11), the inside of concave joint (11) is provided with locking piece (12); Wherein, the preburied module (2) includes connecting box one (21), connecting box two (22), connecting box one (21), connecting box two (22) are symmetrically distributed on both sides of floor slab body (1), one side of connecting box one (21) outer surface is provided with recess one (211), one side of connecting box two (22) outer surface is provided with recess two (221), one side of connecting box one (21) outer surface is provided with the protruding block one (212) that recess two (221) inner wall surface is combined, one side of connecting box two (22) outer surface is provided with the protruding block two (222) that recess one (211) inner wall surface is combined, the inside of protruding block one (212), protruding block two (222) is all fixedly connected with U type reinforcement (23), the outer end of U type reinforcement (23) penetrates connecting box one (21), connecting box two (22) and extends to the inside of floor slab body (1), the side of connecting box one (21), connecting box two (22) away from U type reinforcement (23) is all provided with the placing cavity (213), the inside of placing cavity (213) is provided with the connecting piece (24) for combining connecting box one (21), connecting box two (22); Wherein, the connecting piece (24) includes the rotating seat (241) that is fixedly connected with the bottom of placing cavity (213) inner wall, the rotating seat (241) is rotatably connected with the abutting block (242) through the rotation rod arranged in its inside, the outer surface of rotation rod is provided with the torsional spring (243) that is connected with the inside of abutting block (242), the outer surface of abutting block (242) adopts the concave arc design that is combined with the circumferential outer surface of U type reinforcement (23), the inner wall surface of placing cavity (213) is fixedly connected with the fixed block (244), the fixed block (244) is provided with two and is symmetrically distributed up and down with abutting block (242) as center, the outer surface of fixed block (244) is provided with the clamping groove, the upper and lower sides of abutting block (242) are all fixedly connected with the clamping block (245) that is engaged with the outer surface of clamping groove. The inside of placing cavity (213) is communicated with the inside of recess one (211), recess two (221) respectively, the inner wall cavity of placing cavity (213) adopts the design of depth gradually changes, the lowest point of the inner wall cavity depth of placing cavity (213) is close to the side of fixed block (244).

2. A pre-embedded structure based reinforced concrete load bearing floor structure as claimed in claim 1, wherein: The locking piece (12) includes the sleeve (121) that is fixedly connected with the outer surface of protruding block two (222), the inside of sleeve (121) is communicated with the inside of recess two (221), the inside of protruding block one (212) is provided with the through hole (122), the circumferential inner wall of through hole (122) is slidably connected with the link column (123), the circumferential inner wall of sleeve (121) is slidably connected with the connecting column (124).

3. A pre-embedded structure based reinforced concrete load bearing floor slab structure as claimed in claim 1, wherein: ​ 4. A pre-embedded structure based reinforced concrete load bearing floor structure as claimed in claim 3, wherein: The circumferential outer surface of the connecting column (124) is provided with a contraction groove (1241), the inside of the contraction groove (1241) is slidably connected with a limiting block (125), the bottom end of the limiting block (125) is provided with a spring (126) connected with the inner wall of the contraction groove (1241), and the inside of the protruding block one (212) is provided with a limiting groove (127) matched with the outer surface of the limiting block (125).

5. A pre-embedded structure based reinforced concrete load bearing floor slab structure as claimed in claim 4, wherein: The outer ends of the connecting column (124) and the connecting column (123) are designed in a conical surface, and the outer ends of the protruding block one (212) and the protruding block two (222) are designed in an inclined surface.

6. A pre-embedded structure based reinforced concrete load bearing floor structure as claimed in claim 5, wherein: The upper surface of the connecting box one (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 body (1), and the inside of the protruding block one (212) and the protruding block two (222) is provided with a communicating groove (26).

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