Prefabricated bottom plate for fabricated hollow floor

Abstract

The utility model belongs to the field of building construction, and particularly relates to a prefabricated bottom plate for an assembly type hollow floor system, which comprises a bottom plate, a plurality of prefabricated beams are arranged on the bottom plate, the prefabricated beams extend upwards from the upper surface of the bottom plate, and a plurality of through holes are arranged at intervals along the length direction of the prefabricated beams; a plurality of reserved steel bar assemblies are further arranged on the bottom plate, each reserved steel bar assembly comprises a cast-in-place beam bottom bar, and the cast-in-place beam bottom bars are movably installed in the through holes; the problems that a prefabricated bottom plate of an existing hollow floor system is inconvenient to install on a construction site and low in construction efficiency are solved.

Description

Technical Field

[0001] The utility model belongs to the field of building construction, and in particular relates to a prefabricated bottom plate for assembled hollow floor slabs. Background Art

[0002] Prefabricated buildings are based on the model of prefabricated components in factories and on-site assembly installation. They are characterized by standardized design, factory production, assembly construction, integrated decoration and information management. They integrate various business areas such as R&D design, production and manufacturing, and on-site assembly to achieve sustainable development of new building production methods that achieve energy conservation, environmental protection, and maximum value throughout the entire life cycle of building products.

[0003] With the country's vigorous promotion of prefabricated buildings, prefabricated hollow floor slabs have been widely used. The existing construction process of prefabricated hollow floor slabs is: laying the prefabricated bottom plate of the hollow floor slab - laying the cast-in-place rib beam steel bars - installing the core formwork - laying the hollow floor slab steel bars - pouring concrete. The prefabricated base plate of the hollow floor usually includes two types: one-way rib beams and two-way rib beams. Among them, the two-way rib beam base plate usually includes prefabricated beams and cast-in-place beams. The prefabricated beams are produced and formed in the factory, and the cast-in-place beams are cast and formed at the construction site. In order to ensure the strength of the cast-in-place beams, the bottom steel bars of the cast-in-place beams are usually embedded in the factory. Before pouring concrete at the construction site, the bottom steel bars on each prefabricated base plate are connected to each other. At present, conventional steel bar connection methods include binding, welding or sleeve connection. Binding and welding are inconvenient to operate at the construction site, the workload of workers is large, and the connection is unstable. Since the position of the bottom steel bars on the prefabricated base plate is fixed, the problem of steel bar dislocation is prone to occur during installation at the construction site. It is difficult to simply and quickly connect the dislocated steel bars using sleeves, resulting in low construction efficiency. Utility Model Content

[0004] The utility model aims to provide a prefabricated bottom plate for assembled hollow floor slabs, so as to solve the problems of inconvenient installation at the construction site and low construction efficiency of the prefabricated bottom plates of existing hollow floor slabs.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A prefabricated base plate for assembled hollow floor slabs comprises a base plate, on which a plurality of prefabricated beams are arranged, the prefabricated beams extend upward from the upper surface of the base plate, and a plurality of through holes are arranged at intervals along the length direction of the prefabricated beams; a plurality of reserved steel bar assemblies are also arranged on the base plate, the reserved steel bar assemblies comprise cast-in-place beam bottom bars, and the cast-in-place beam bottom bars are movably installed in the through holes.

[0007] Furthermore, the bottom plate is pre-embedded with bottom plate longitudinal ribs and bottom plate transverse ribs, multiple bottom plate longitudinal ribs are arranged at intervals along the width direction of the bottom plate, and multiple bottom plate transverse ribs are arranged at intervals along the length direction of the bottom plate. The bottom plate longitudinal ribs and bottom plate transverse ribs together constitute a steel grid support structure.

[0008] Furthermore, the length of the transverse ribs of the bottom plate is not greater than the width of the bottom plate.

[0009] Furthermore, each of the precast beams is embedded with a plurality of precast beam stirrups and a plurality of precast beam steel bars, the plurality of precast beam stirrups are arranged at intervals along the length direction of the precast beam, the precast beam stirrups extend upward from the bottom of the precast beam to the outside of the precast beam, the upper ends of the precast beam stirrups are bent inward to form an opening, and the precast beam steel bars pass through all the precast beam stirrups in sequence and are fixedly connected to the precast beam stirrups.

[0010] Furthermore, each group of the reserved steel bar components also includes a plurality of cast-in-place beam stirrups arranged in parallel, the bottom of the cast-in-place beam stirrups is embedded in the base plate, the upper end of the cast-in-place beam stirrups extends outside the base plate, and the upper end of the cast-in-place beam stirrups is bent inward to form an opening; the cast-in-place beam bottom reinforcement passes through all the cast-in-place beam stirrups in sequence.

[0011] Furthermore, the two ends of the base plate are splicing sections, and a plurality of steel trusses are arranged on the splicing sections. The bottom of the steel trusses is embedded in the base plate. The steel trusses can be used for connection and hoisting, and can also be used to fix the position of the core mold.

[0012] Furthermore, the steel truss includes bottom reinforcement embedded in the bottom plate, top reinforcement is arranged above the bottom reinforcement, a plurality of connecting reinforcements are connected between the top reinforcement and the bottom reinforcement, and the top reinforcement, bottom reinforcement and connecting reinforcement together constitute a triangular support structure.

[0013] Furthermore, one end of the cast-in-place beam bottom reinforcement is provided with a connecting device, and the connecting device is used to connect other cast-in-place beam bottom reinforcements.

[0014] Furthermore, the connection device may be a threaded sleeve, a grouting sleeve or an extrusion sleeve.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] When the prefabricated base plate disclosed by the utility model is used for the construction of hollow floor slabs, the corresponding cast-in-place beam bottom bars of all prefabricated base plates can be connected together through the connecting device at the end of the cast-in-place beam bottom bars; because the utility model reserves through holes on the prefabricated beams, the cast-in-place beam bottom bars can move in the through holes. Compared with the existing prefabricated base plates with pre-embedded cast-in-place beam bottom steel bars, the utility model can effectively avoid the misalignment of the cast-in-place beam bottom bars after the prefabricated base plates are spliced ​​on the construction site, and can use threaded sleeves, grouting sleeves or extrusion sleeves to achieve simple and rapid connection of the cast-in-place beam bottom bars, thereby speeding up the construction speed and shortening the construction period. Compared with connection methods such as binding and welding, the connection stability of the threaded sleeves or grouting sleeves is better; and, after the splicing of the cast-in-place beam bottom bars is completed, the position of the cast-in-place beam bottom bars can be moved, and the splicing of the cast-in-place beam bottom bars and the splicing seam position of the prefabricated base plate can be staggered to improve the crack resistance of the splicing of the hollow floor slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is the reinforcement diagram of the utility model;

[0019] Figure 3 for Figure 2 Sectional view in the AA direction;

[0020] Figure 4 for Figure 2 Cross-sectional view in the BB direction;

[0021] Figure 5 For Figure 1 Schematic diagram of the hollow floor structure of the base plate. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods:

[0023] The reference numerals in the drawings of the specification include:

[0024] Bottom plate 1, bottom plate longitudinal ribs 11, bottom plate transverse ribs 12;

[0025] Precast beam 2, through hole 21, precast beam stirrups 22, precast beam steel bars 23;

[0026] Reserved steel bar assembly 3, cast-in-place beam bottom reinforcement 31, cast-in-place beam stirrups 32;

[0027] Steel bar truss 4, bottom reinforcement 41, top reinforcement 42, connecting reinforcement 43;

[0028] Floor base plate 5, core mold 6, connecting piece 7, floor panel 8. Example

[0029] like Figure 1-3 As shown, a prefabricated base plate for assembled hollow floor slabs includes a base plate 1, on which a plurality of prefabricated beams 2 are integrally cast. In this embodiment, the prefabricated beams 2 are arranged in two numbers, and the two prefabricated beams 2 are longitudinally and spaced apart on the base plate 1; the prefabricated beams 2 extend upward from the upper surface of the base plate 1, and a plurality of through holes 21 are opened on the prefabricated beams 2, and the plurality of through holes 21 are spaced apart along the length direction of the prefabricated beams 2. A plurality of reserved steel bar assemblies 3 are also embedded in the base plate 1, and the plurality of reserved steel bar assemblies 3 are arranged transversely and at intervals on the base plate 1; each of the reserved steel bar assemblies 3 includes two cast-in-place beam bottom bars 31 and a plurality of cast-in-place beam stirrups 32, the two cast-in-place beam bottom bars 31 are movably installed in the through holes 21, and the plurality of cast-in-place beam stirrups 32 are arranged at intervals along the width direction of the base plate 1; the bottom of the cast-in-place beam stirrups 32 is embedded in the base plate 1, the upper ends of the cast-in-place beam stirrups 32 extend to the outside of the base plate 1, and the upper ends of the cast-in-place beam stirrups 32 are bent inward to form an opening; the cast-in-place beam bottom bars 31 pass through all the cast-in-place beam stirrups 32 in sequence and are fixed to the inner side of the cast-in-place beam stirrups 32; a connecting device (not shown in the figure) is provided at one end of the cast-in-place beam bottom bars 31, and the connecting device is used to connect other cast-in-place beam bottom bars 31, and the connecting device can be a threaded sleeve, a grouting sleeve, or an extrusion sleeve.

[0030] The utility model reserves a through hole 21 on the prefabricated beam 2 so that the cast-in-place beam bottom reinforcement 31 can move in the through hole 21, which can effectively avoid the cast-in-place beam bottom reinforcement 31 on two adjacent prefabricated panels being misaligned after the prefabricated bottom panels are spliced ​​on the construction site, resulting in inconvenience for workers in connecting the steel bars; by arranging a threaded sleeve or a grouting sleeve or an extrusion sleeve at the end of the cast-in-place beam bottom reinforcement 31, workers can simply and quickly connect the cast-in-place beam bottom reinforcement 31, speeding up the construction speed and shortening the construction period; and, compared with connection methods such as binding and welding, the connection stability of the threaded sleeve or the grouting sleeve is better; in order to facilitate the transportation of the prefabricated bottom panel, the cast-in-place beam bottom reinforcement 31 is then inserted into the corresponding through hole 21 at the construction site.

[0031] like Figure 1-4 As shown, the bottom plate 1 is pre-embedded with bottom plate longitudinal ribs 11 and bottom plate transverse ribs 12, a plurality of bottom plate longitudinal ribs 11 are arranged at intervals along the width direction of the bottom plate 1, a plurality of bottom plate transverse ribs 12 are arranged at intervals along the length direction of the bottom plate 1, and the bottom plate longitudinal ribs 11 and the bottom plate transverse ribs 12 together constitute a steel grid support structure; the length of the bottom plate transverse ribs 12 is not greater than the width of the bottom plate 1. By arranging the steel grid support structure in the bottom plate 1, the strength of the bottom plate 1 can be enhanced, and the bottom plate transverse ribs 12 do not extend out of the bottom plate 1, which can facilitate the transportation of the prefabricated bottom plate.

[0032] like Figure 1-4As shown, each precast beam 2 is embedded with a plurality of precast beam stirrups 22 and a plurality of precast beam steel bars 23, and the plurality of precast beam stirrups 22 are arranged at intervals along the length direction of the precast beam 2, and the precast beam stirrups 22 extend upward from the bottom of the precast beam 2 to the outside of the precast beam 2, and the upper ends of the precast beam stirrups 22 are bent inward to form an opening; in this embodiment, four precast beam steel bars 23 are arranged, and the four precast beam steel bars 23 are respectively embedded in the four corners of the precast beam 2, and the four precast beam steel bars 23 pass through all the precast beam stirrups 22 in sequence and are fixedly connected to the precast beam stirrups 22.

[0033] like Figure 1-2 As shown in Figures 4 and 5, the two ends of the bottom plate 1 are splicing sections, and a plurality of steel trusses 4 are arranged on the splicing sections. The steel trusses 4 include bottom bars 41 embedded in the bottom plate 1, top bars 42 are arranged above the bottom bars 41, and a plurality of connecting bars 43 are fixedly connected between the top bars 42 and the bottom bars 41. The top bars 42, the bottom bars 41 and the connecting bars 43 together form a triangular support structure. When the prefabricated bottom plate is spliced ​​and installed at the construction site, the hoisting can be connected to the steel trusses 4 to realize the movement of the prefabricated bottom plate, speed up the splicing speed of the prefabricated bottom plate, and improve the construction efficiency.

[0034] Figure 5 The hollow floor structure obtained by the prefabricated bottom plate construction disclosed in this embodiment has the following construction process:

[0035] 1. Factory produces prefabricated baseboards;

[0036] 2. Splicing floor slabs at the construction site 5: transporting multiple prefabricated floor slabs to the construction site by hoisting, so that the multiple prefabricated floor slabs are spliced ​​together;

[0037] 3. Insert and splice the cast-in-place beam bottom reinforcement 31 at the construction site: pass the cast-in-place beam bottom reinforcement 31 through the through hole 21 on the precast beam 2, and use the connecting device to connect the first position of the cast-in-place beam bottom reinforcement 31 at the corresponding position, move the position of the cast-in-place beam bottom reinforcement 31, so that the splicing of the cast-in-place beam bottom reinforcement 31 and the splicing joint of the floor bottom plate 5 are staggered to improve the crack resistance of the splicing of the hollow floor, and finally fix the cast-in-place beam bottom reinforcement 31 on the inner side of the cast-in-place beam stirrup 32;

[0038] 4. Tie additional steel bars to the joints of the floor slab 5: fix the additional steel bars to the steel truss 4 on the floor slab 1;

[0039] 5. Install the core mold 6: install the core mold 6 between two adjacent precast beams 2, and install the core mold 6 on both sides of the joint of the floor bottom plate 5 on the top of the steel truss 4;

[0040] 6. Laying the hollow floor slab steel bars;

[0041] 7. Pouring concrete: The concrete is consolidated on the reserved steel bar assembly 3 to form a cast-in-place beam, consolidated at the joint to form a connector 7, and consolidated on the top of the core form 6 to form a floor panel 8.

[0042] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical solution of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A prefabricated base plate for assembled hollow floor, characterized in that: It includes a base plate, on which are arranged a plurality of prefabricated beams, which extend upward from the upper surface of the base plate, and a plurality of through holes are arranged at intervals along the length direction of the prefabricated beams; the base plate is also provided with a plurality of reserved steel bar assemblies, which include cast-in-place beam bottom bars, which can be movably installed in the through holes.

2. The prefabricated base plate for assembled hollow floor according to claim 1, characterized in that: The bottom plate is pre-embedded with bottom plate longitudinal reinforcement and bottom plate transverse reinforcement. Multiple bottom plate longitudinal reinforcements are arranged at intervals along the width direction of the bottom plate, and multiple bottom plate transverse reinforcements are arranged at intervals along the length direction of the bottom plate. The bottom plate longitudinal reinforcement and bottom plate transverse reinforcement together constitute a steel grid support structure.

3. The prefabricated base plate for assembled hollow floor according to claim 2, characterized in that: The length of the bottom plate transverse ribs is not greater than the width of the bottom plate.

4. The prefabricated base plate for assembled hollow floor according to claim 1, characterized in that: A plurality of precast beam stirrups and a plurality of precast beam steel bars are embedded in each of the precast beams. The plurality of precast beam stirrups are arranged at intervals along the length direction of the precast beam. The precast beam stirrups extend upward from the bottom of the precast beam to the outside of the precast beam. The upper ends of the precast beam stirrups are bent inward to form an opening. The precast beam steel bars pass through all the precast beam stirrups in sequence and are fixedly connected to the precast beam stirrups.

5. The prefabricated base plate for assembled hollow floor according to claim 1, characterized in that: Each group of the reserved steel bar components also includes a plurality of cast-in-place beam stirrups arranged in parallel, the bottom of the cast-in-place beam stirrups is embedded in the base plate, the upper end of the cast-in-place beam stirrups extends outside the base plate, and the upper end of the cast-in-place beam stirrups is bent inward to form an opening; the cast-in-place beam bottom reinforcement passes through all the cast-in-place beam stirrups in sequence.

6. The prefabricated base plate for assembled hollow floor according to claim 1, characterized in that: The two ends of the bottom plate are splicing sections, on which a plurality of steel trusses are arranged, the bottoms of the steel trusses are pre-buried in the bottom plate, and the steel trusses can be used for connection and hoisting, and can also be used for fixing the position of the core mold.

7. The prefabricated base plate for assembled hollow floor according to claim 6, characterized in that: The steel bar truss comprises bottom bars embedded in the bottom plate, top bars are arranged above the bottom bars, a plurality of connecting bars are connected between the top bars and the bottom bars, and the top bars, bottom bars and connecting bars together form a triangular support structure.

8. The prefabricated base plate for assembled hollow floor according to claim 1, characterized in that: One end of the cast-in-place beam bottom reinforcement is provided with a connecting device, and the connecting device is used to connect other cast-in-place beam bottom reinforcements.

9. The prefabricated bottom plate for assembled hollow floor according to claim 8, characterized in that: The connecting device may be a threaded sleeve, a grouting sleeve or an extrusion sleeve.

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