Laminated slab structure with adjustable overhanging steel bars

Abstract

The utility model belongs to the technical field of assembly type concrete buildings, and discloses a laminated slab structure with adjustable overhanging steel bars, which comprises a prefabricated bottom plate, mechanism installation notches are formed in the periphery of the upper surface of the prefabricated bottom plate, and the outwards-extending steel bar adjusting mechanisms are installed at the mechanism installation notches. The overhanging steel bar adjusting mechanism comprises a plurality of steel sleeves; the multiple steel sleeves are arranged at the mechanism installation notch at intervals, and the extending ends of the steel sleeves are located above the groove bottom of the mechanism installation notch. A reserved kidney-shaped hole is formed in the upper surface of the steel sleeve, and the reserved kidney-shaped hole is formed in the axis direction of the steel sleeve; the overhanging steel bar is movably inserted into the steel sleeve; the connecting piece is movably arranged in the reserved kidney-shaped hole; the driving piece is horizontally arranged above the steel sleeves and is perpendicular to all the steel sleeves, and the driving piece is connected with the overhanging steel bars through the connecting piece; the length of the steel bars extending out of the four sides of the laminated slab can be freely adjusted, construction efficiency is improved, and the risk that workers are injured due to the fact that the steel bars extend outwards is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fabricated concrete building, in particular to a superimposed slab structure with adjustable external reinforcement. BACKGROUND

[0002] With the development of fabricated concrete building technology, the combination of prefabricated superimposed slab and cast-in-situ beam column has become one of the commonly used construction methods. However, in the combination system of prefabricated superimposed slab and cast-in-situ beam column, when the width of cast-in-situ concrete beam is large, four limb stirrups need to be set. Therefore, during the hoisting process of superimposed slab, the external reinforcement of prefabricated superimposed slab often interferes with the frame beam reinforcement, which seriously affects the construction efficiency and has great safety hazards.

[0003] Specifically, during the construction of cast-in-situ concrete beam, the frame beam reinforcement is first bound, and then the secondary beam reinforcement is bound. When the prefabricated superimposed slab is installed, the external reinforcement of the prefabricated superimposed slab is required to extend into the beam for anchoring. In actual operation, the external reinforcement is first manually pre-bent, then the superimposed slab is hoisted, and after the hoisting is in place, the external reinforcement is reset. However, the pre-bending and resetting of the external reinforcement easily lead to the damage of the prefabricated superimposed slab and the fracture of the external reinforcement, thereby affecting the anchoring length of the external reinforcement and making it difficult to ensure the resetting effect of the reinforcement. In addition, in large workshops, the external reinforcement of the superimposed slab is designed on all four sides with frame beam reinforcement. At this time, the external reinforcement not only hinders the construction and reduces the construction efficiency, but also easily causes harm to the construction personnel during the installation process. SUMMARY

[0004] In view of the technical problems existing in the prior art, the utility model provides a superimposed slab structure with adjustable external reinforcement to solve the technical problem that during the hoisting process of superimposed slab, the external reinforcement of prefabricated superimposed slab often interferes with the frame beam reinforcement, which seriously affects the construction efficiency and has great safety hazards.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] The utility model provides a superimposed slab structure with adjustable external reinforcement, which comprises a prefabricated bottom plate and an external reinforcement adjusting mechanism. The upper surface of the prefabricated bottom plate is provided with mechanism installation notches around, and the external reinforcement adjusting mechanism is installed at the mechanism installation notches.

[0007] The external reinforcement adjusting mechanism comprises a plurality of steel sleeves, external reinforcement, connecting pieces and driving pieces.

[0008] The plurality of steel sleeves are arranged at the mechanism installation notches at intervals, one end of the steel sleeve is fixed in the prefabricated bottom plate, and the other end of the steel sleeve is a protruding end. The protruding end of the steel sleeve is located above the groove bottom of the mechanism installation notch.

[0009] The upper surface of the steel sleeve is provided with a reserved waist hole arranged along the axial direction of the steel sleeve; the external reinforcing steel bars are movably inserted into the steel sleeve and can be extended from the extending end of the steel sleeve; the connecting pieces are movably arranged in the reserved waist hole; the driving pieces are horizontally arranged above the steel sleeve and are perpendicular to all the steel sleeves, and the driving pieces are connected with the external reinforcing steel bars through the connecting pieces.

[0010] Further, the prefabricated bottom plate comprises bottom plate concrete and plate internal force steel bars, the bottom plate concrete is wrapped outside the plate internal force steel bars; the steel sleeve extends into the bottom plate concrete and is fixedly connected with the plate internal force steel bars.

[0011] Further, the steel truss is horizontally arranged on the prefabricated bottom plate, the lower end of the steel truss extends into the prefabricated bottom plate, and the upper end of the steel truss extends above the upper surface of the prefabricated bottom plate.

[0012] Further, the diameter of the external reinforcing steel bar is smaller than the inner diameter of the steel sleeve.

[0013] Further, the connecting piece is vertically arranged in the reserved waist hole, the thickness of the connecting piece is smaller than the width of the reserved waist hole; the lower end of the connecting piece is fixedly connected with the external reinforcing steel bar in a vertical mode, and the upper end of the connecting piece extends to the outside of the steel sleeve and is fixedly connected with the bottom end of the driving piece in a vertical mode.

[0014] Further, the driving piece is arranged along the side length of the prefabricated bottom plate and is fixedly connected with the upper end of all the connecting pieces in the same external reinforcing steel bar adjusting mechanism in a vertical mode.

[0015] Further, the top surface of the driving piece is lower than the top surface of the prefabricated bottom plate.

[0016] Further, the connecting piece is a square steel plate, and the driving piece is a square steel rod.

[0017] Further, the square steel rod and the square steel plate are fixedly connected through welding, and the square steel plate and the external reinforcing steel bar are fixedly connected through welding.

[0018] Further, the upper cast-in-place layer is arranged above the prefabricated bottom plate.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The overhanging steel bar adjustable laminated slab structure disclosed by the utility model provides an overhanging steel bar adjusting mechanism arranged in the mechanism installation gap of the prefabricated bottom plate, in the overhanging steel bar adjusting mechanism, the position of the overhanging steel bar in the steel sleeve is adjusted through the driving piece, the length of the overhanging steel bar of the laminated slab can be freely adjusted, the overhanging steel bar of the prefabricated bottom plate can be retracted into the prefabricated bottom plate during transportation and hoisting construction, the construction efficiency is improved, and the risk of worker injury caused by the overhanging steel bar is avoided; secondly, the overhanging steel bar does not need to be pre-bent and reset during hoisting, the hoisting difficulty is effectively reduced, the problem of the space influence of the overhanging steel bar of the prefabricated bottom plate on the supporting beam during construction is solved, the overhanging steel bar is positioned once through hoisting, and the effect of convenient construction is achieved; in addition, all the overhanging steel bars on each side of the prefabricated bottom plate are connected through the connecting piece and the driving piece, the length of the overhanging steel bar on the same side can be adjusted through the driving piece, the single steel bar does not need to be adjusted one by one, the length of the overhanging steel bar on the same side is effectively ensured to be consistent, the length of the overhanging steel bar of the single steel bar does not need to be repeatedly adjusted, the operation is simple, and the effect of convenient construction is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0022] Figure 1 The plane schematic view of the overhanging steel bar of the laminated slab structure provided by the utility model is not stretched out.

[0023] Figure 2 The three-dimensional structure schematic view of the overhanging steel bar of the laminated slab structure provided by the utility model is not stretched out.

[0024] Figure 3 The plane schematic view of the overhanging steel bar of the laminated slab structure provided by the utility model is stretched out.

[0025] Figure 4 The three-dimensional structure schematic view of the overhanging steel bar of the laminated slab structure provided by the utility model is stretched out.

[0026] Figure 5 The partial schematic view of the overhanging steel bar in the overhanging steel bar adjusting mechanism in the utility model before the overhanging steel bar is stretched out.

[0027] Figure 6 The partial schematic view of the overhanging steel bar in the overhanging steel bar adjusting mechanism in the utility model after the overhanging steel bar is stretched out.

[0028] Figure 7 The partial structure schematic view of the overhanging steel bar of the plate end side of the laminated slab structure in the utility model before the overhanging steel bar is stretched out.

[0029] Figure 8 This is a partial structural diagram of the composite slab structure in this utility model after the outward-extending reinforcing bars on one side of the slab end have extended.

[0030] Among them, 1 is a precast base plate, 2 is a steel sleeve, 3 is an outward reinforcing bar, 4 is a connector, 5 is a driving component, and 6 is a steel truss; 101 is a mechanism installation notch, 102 is a longitudinal reinforcing bar inside the plate, 103 is a transverse reinforcing bar inside the plate; and 201 is a reserved waist hole. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] As attached Figures 1-8 As shown, this utility model provides a composite slab structure with adjustable outward-extending reinforcing bars, including a precast base slab 1, an outward-extending reinforcing bar adjustment mechanism, a steel truss 6, and an upper cast-in-place layer. The outward-extending reinforcing bar adjustment mechanism is arranged around the upper surface of the precast base slab 1, and is used to anchor the outward-extending reinforcing bars in the mechanism to the frame beam. The upper cast-in-place layer is arranged above the precast base slab 1. The steel truss 6 is arranged between the precast base slab 1 and the upper cast-in-place layer to strengthen the rigidity between the precast base slab and the upper cast-in-place layer. The upper end of the steel truss 6 extends into the precast base slab 1 and above the upper surface of the precast base slab 1, and is connected to the upper cast-in-place layer, thereby enhancing the bonding between the precast base slab 1 and the upper cast-in-place layer, improving the shear resistance of the bonding surface between the precast base slab 1 and the upper cast-in-place layer, and thus ensuring the integrity of the composite slab structure.

[0033] The precast base slab 1 includes base slab concrete and internal reinforcing bars. The base slab concrete is wrapped around the outside of the internal reinforcing bars. The internal reinforcing bars include longitudinal reinforcing bars 102 and transverse reinforcing bars 103 arranged in parallel at preset intervals.

[0034] The upper surface of the prefabricated bottom plate 1 is provided with a mechanism mounting notch 101 around the upper surface, which serves as the mounting space of the external reinforcing steel bar adjusting mechanism; wherein the mechanism mounting notch 101 is formed by cutting the upper surface edge of the prefabricated bottom plate 1 downward by a preset depth, and the long axis direction of the mechanism mounting notch 101 is consistent with the side length direction of the prefabricated bottom plate 1; that is, one side of the mechanism mounting notch 101 is through the side of the prefabricated bottom plate 1, the other side of the mechanism mounting notch 101 extends towards the center direction of the prefabricated bottom plate 1, the top of the mechanism mounting notch 101 is through the upper surface of the prefabricated bottom plate 1, and the bottom of the mechanism mounting notch 101 extends towards the lower surface direction of the prefabricated bottom plate 1.

[0035] The external reinforcing steel bar adjusting mechanism is mounted at the mechanism mounting notch 101, and the external reinforcing steel bar adjusting mechanism comprises a plurality of steel sleeves 2, external reinforcing steel bars 3, connecting pieces 4 and driving pieces 5.

[0036] A plurality of steel sleeves 2 are arranged at intervals at the mechanism mounting notch 101, and the steel sleeves 2 are arranged in parallel with each other; one end of the steel sleeve 2 extends and is fixed in the prefabricated bottom plate 1, and the other end of the steel sleeve 2 is an extending end; wherein the extending end of the steel sleeve 2 is located above the groove bottom of the mechanism mounting notch 101; specifically, the fixed end of the steel sleeve 2 extends towards the central axis direction of the prefabricated bottom plate 1 and is fixedly connected with the longitudinal force bearing rib 102 or the transverse force bearing rib 103 in the plate; preferably, the length of the extending end of the steel sleeve 2 is adapted to the width of the mechanism mounting notch 101.

[0037] The upper surface of the steel sleeve 2 is provided with a reserved waist hole 201, and the reserved waist hole 201 is arranged along the axis direction of the steel sleeve 2; wherein the reserved waist hole 201 is located on the upper surface of the extending end of the steel sleeve 2, the starting point of the reserved waist hole 201 is flush with the starting point of the extending end of the steel sleeve 2, and the end point of the reserved waist hole 201 is located at a position 3 cm away from the terminal end of the extending end of the steel sleeve 2; that is, one end of the reserved waist hole 201 starts at the position where the cross-sectional height of the prefabricated bottom plate 1 changes, and the other end is 3 cm away from the position where the steel sleeve 2 communicates with the outside.

[0038] The external reinforcing steel bar 3 can be movably inserted in the steel sleeve 2 and can extend from the extending end of the steel sleeve 2; wherein the diameter of the external reinforcing steel bar 3 is smaller than the inner diameter of the steel sleeve 2, so as to ensure that the external reinforcing steel bar 3 can move in the steel sleeve 2 along the axis direction of the steel sleeve 2.

[0039] The connecting piece 4 is movably arranged in the reserved waist hole 201, and the moving direction of the connecting piece 4 is the same as the axial direction of the reserved waist hole 201; wherein the thickness direction of the connecting piece 4 is parallel to the axial direction of the reserved waist hole 201, and the thickness of the connecting piece 4 is smaller than the width of the reserved waist hole 201; specifically, the connecting piece 4 is vertically inserted into the reserved waist hole 201, and the lower end of the connecting piece 4 extends into the steel sleeve 2 and is vertically fixed with the outer extending steel bar 3; the upper end of the connecting piece 4 extends above the upper surface of the steel sleeve 2 and is used for being vertically fixed with the driving piece 5; preferably, the connecting piece 4 adopts a square steel plate, and the square steel plate is fixed between the outer extending steel bar 3 by welding.

[0040] The driving piece 5 is horizontally arranged above the steel sleeve 2 and is perpendicular to all the steel sleeves 2, and the driving piece 5 is connected with the outer extending steel bar 3 through the connecting piece 4; specifically, the driving piece 5 is arranged along the side length of the prefabricated bottom plate 1, and the upper end of all the connecting pieces 4 in the same outer extending steel bar adjusting mechanism is vertically fixed and connected; wherein the upper end of the connecting piece 4 extends to the outside of the steel sleeve 2 and is vertically fixed with the bottom end of the driving piece 5; preferably, the driving piece 5 is a square steel rod, and the square steel rod is fixed between the square steel plate by welding; it should be noted that the top surface height of the driving piece 5 is lower than the top surface height of the prefabricated bottom plate 1, so that the upper cast-in-place layer can completely cover the outer extending steel bar adjusting mechanism after construction, which can limit and fix the driving piece 5 and the connecting piece 4, and further ensure the reliability of the outer extending steel bar 3.

[0041] Construction process and working principle of the outer extending steel bar adjusting mechanism:

[0042] The outer extending steel bar adjustable composite slab structure has the construction process as follows:

[0043] When the prefabricated bottom plate 1 is manufactured, the outer extending steel bar adjusting mechanism is installed at the mechanism installation gap of the prefabricated bottom plate 1, and the steel sleeve 2 in the outer extending steel bar adjusting mechanism is fixedly connected with the in-plate longitudinal stress bar 102 or the in-plate transverse stress bar 103 in the prefabricated bottom plate 1; wherein the steel sleeve 2 and the in-plate longitudinal stress bar 102 or the in-plate transverse stress bar 103 are connected by welding or other mechanical connection.

[0044] After the prefabricated bottom plate 1 is completed, the outer extending steel bars 3 are pushed by the driving members 5 to move along the axis direction of the steel sleeves 2 to the central axis direction of the prefabricated bottom plate 1, so that the outer extending steel bars 3 are completely retracted into the steel sleeves 2, and then the outer extending steel bars 3 are in the non-extending state during the transportation and hoisting of the prefabricated bottom plate 1, so as to transport, hoist and position, and then avoid the conflict with the beam steel bars around the composite slab, ensure the sufficient transportation and hoisting space, and facilitate the installation of the composite slab.

[0045] After the prefabricated bottom plate 1 is hoisted to the preset position, the outer extending steel bars 3 are pushed by the driving members 5 to move along the axis direction of the steel sleeves 2 to the central axis direction of the prefabricated bottom plate 1, so that the outer extending steel bars 3 are completely retracted into the steel sleeves 2, and then the outer extending steel bars 3 are in the non-extending state during the transportation and hoisting of the prefabricated bottom plate 1, so as to transport, hoist and position, and then avoid the conflict with the beam steel bars around the composite slab, ensure the sufficient transportation and hoisting space, and facilitate the installation of the composite slab.

[0046] After the above steps are completed, the upper cast-in-place layer construction is started, and the composite slab structure construction is completed.

[0047] The outer extending steel bar adjustable composite slab structure sets the steel sleeve 2 with the reserved waist hole 201 at the mechanism installation gap of the prefabricated bottom plate 2; one end of the steel sleeve 2 is fixedly connected with the inner longitudinal stress bar 102 or the inner transverse stress bar 103 of the plate, and the other end is communicated with the outside; one end of the reserved waist hole 201 is from the cross section height change position of the prefabricated bottom plate 1, and the other end is 3cm away from the opening width of the reserved waist hole 201 at the position where the steel sleeve 2 is communicated with the outside; the outer extending steel bar 3 is arranged in the steel sleeve 2, and the diameter of the outer extending steel bar 3 is smaller than the distance between the steel sleeves 2; the connecting piece 4 is vertically arranged in the reserved waist hole 201, the lower end of the connecting piece 4 is fixedly connected with the outer extending steel bar 3, and the upper end of the connecting piece 4 is fixedly connected with the driving member 5; the driving member 5 is fixedly connected with the connecting pieces 4 of all the outer extending steel bars 3 on the same side of the prefabricated bottom plate 1.

[0048] In this invention, by setting up an outward-extending rebar adjustment mechanism, the length of the outward-extending rebars on all four sides of the composite slab can be freely adjusted. This allows the outward-extending rebars of the precast base slab to be retracted into the precast base slab during transportation and hoisting, improving construction efficiency and avoiding the risk of worker injury caused by outward-extending rebars. Simultaneously, it effectively reduces transportation and hoisting difficulties, solving the problem of the influence between the outward-extending rebars on all four sides of the precast base slab and the space of the supporting beams during construction, achieving one-time hoisting and placement for convenient construction. Secondly, without eliminating the outward-extending rebars of the precast base slab or reducing their length, it effectively reduces transportation and hoisting difficulties. After hoisting, workers can adjust the outward-extending length of the rebars using the drive mechanism, eliminating the need for manual pre-bending and simplifying operation. Furthermore, by connecting all the outward-extending rebars on the same side of the precast base slab using connectors and the drive mechanism, the length of all outward-extending rebars on the same side can be adjusted simply by using the drive mechanism, eliminating the need to adjust individual outward-extending rebars one by one. This effectively ensures consistent outward-extending lengths on the same side, avoiding repeated adjustments to individual rebar lengths, simplifying operation and achieving convenient construction.

[0049] The composite slab structure with adjustable outward-extending reinforcing bars described in this utility model has a simple structural design, and the components are easy to process and install. The precast base slab is in a state without reinforcing bars when it is processed and shipped from the factory, which is convenient for transportation and not easily damaged. The composite slab structure does not conflict with the beam reinforcing bars during installation and is easy to hoist. After the beam reinforcing bars are tied, the outward-extending reinforcing bars on the same side can be adjusted simultaneously by the driving component in the outward-extending reinforcing bar adjustment mechanism, so that the outward-extending reinforcing bars on all four sides extend and anchor into the beam, which improves construction efficiency and safety.

[0050] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. A composite slab structure with adjustable overhanging reinforcement, characterized by, It comprises a prefabricated bottom plate (1) and an external reinforcing steel bar adjusting mechanism; the upper surface of the prefabricated bottom plate (1) is provided with mechanism installation notches (101) around; the external reinforcing steel bar adjusting mechanism is installed at the mechanism installation notches (101). The external reinforcing steel bar adjusting mechanism comprises a plurality of steel sleeves (2), external reinforcing steel bars (3), connecting pieces (4) and driving pieces (5). The plurality of steel sleeves (2) are arranged at the mechanism installation notches (101) at intervals, one end of the steel sleeve (2) is fixedly extended in the prefabricated bottom plate (1), and the other end of the steel sleeve (2) is an extending end; wherein the extending end of the steel sleeve (2) is located above the groove bottom of the mechanism installation notches (101). The upper surface of the steel sleeve (2) is provided with a reserved waist hole (201), the reserved waist hole (201) is arranged along the axial direction of the steel sleeve (2); the external reinforcing steel bar (3) is movably inserted in the steel sleeve (2) and can be extended from the extending end of the steel sleeve (2); the connecting piece (4) is movably arranged in the reserved waist hole (201); the driving piece (5) is horizontally arranged above the steel sleeve (2) and is perpendicular to all the steel sleeves (2), and the driving piece (5) is connected with the external reinforcing steel bar (3) through the connecting piece (4).

2. The composite slab structure with adjustable extended reinforcement according to claim 1, characterized in that, The prefabricated bottom plate (1) comprises bottom plate concrete and plate internal force steel bars, the bottom plate concrete is wrapped outside the plate internal force steel bars; the steel sleeve (2) extends into the bottom plate concrete and is fixedly connected with the plate internal force steel bars.

3. The composite slab structure with adjustable extended reinforcement according to claim 1, characterized in that, It also comprises a steel truss (6); the steel truss (6) is horizontally arranged on the prefabricated bottom plate (1), the lower end of the steel truss (6) extends into the prefabricated bottom plate (1), and the upper end of the steel truss (6) extends above the upper surface of the prefabricated bottom plate (1).

4. The composite slab structure with adjustable extended reinforcement according to claim 1, characterized in that, The diameter of the external reinforcing steel bar (3) is smaller than the inner diameter of the steel sleeve (2).

5. The composite slab structure with adjustable extended reinforcement according to claim 1, characterized in that, The connecting piece (4) is vertically arranged in the reserved waist hole (201), the thickness of the connecting piece (4) is smaller than the width of the reserved waist hole (201); the lower end of the connecting piece (4) is vertically fixed with the external reinforcing steel bar (3), and the upper end of the connecting piece (4) extends to the outside of the steel sleeve (2) and is vertically fixed with the bottom end of the driving piece (5).

6. The composite slab structure with adjustable extended reinforcement according to claim 5, characterized in that, The driving piece (5) is arranged along the side length of the prefabricated bottom plate (1) and is vertically fixed and connected with the upper end of all the connecting pieces (4) in the same external reinforcing steel bar adjusting mechanism.

7. The composite slab structure with adjustable extended reinforcement according to claim 6, characterized in that, The top surface height of the driving piece (5) is lower than the top surface height of the prefabricated bottom plate (1).

8. The composite slab structure with adjustable extended reinforcement according to claim 6, characterized in that, The connecting piece (4) is a square steel plate, and the driving piece (5) is a square steel rod.

9. The composite slab structure with adjustable extended reinforcement according to claim 8, characterized in that, The square steel rod and the square steel plate are fixed by welding, and the square steel plate and the external reinforcing steel bar (3) are fixed by welding.

10. The composite slab structure with adjustable extended reinforcement according to claim 1, characterized in that, It also comprises an upper cast-in-place layer; the upper cast-in-place layer is arranged above the prefabricated bottom plate (1).

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