Truss-free prefabricated bottom plate without steel bars at steel bar plate end and laminated plate abutted seam structure of truss-free prefabricated bottom plate

Abstract

The utility model relates to a truss-free steel bar plate end reinforcement-free prefabricated bottom plate and a laminated plate abutted seam structure thereof, a concrete prefabricated plate with slotted sides is a quadrilateral reinforced concrete plate, orthogonal steel bars in the quadrilateral reinforced concrete plate do not extend out of four side surfaces, the lower surface is flat, and the upper surface is a rough surface; equidistant trapezoidal grooves are formed in the side edge of the side edge slotted concrete prefabricated bottom plate to form trapezoidal bulges; groove abutted seams are formed between the two side edge slotted concrete prefabricated bottom plates, a plurality of transverse mounting groove hole internal additional steel bars are arranged in the groove abutted seams, and orthogonal steel bars in the quadrilateral reinforced concrete plate do not stretch out of the four side faces through the side edge slotted concrete prefabricated plates, so that the steel use amount is effectively reduced, the stretching steel bars are prevented from being damaged during transportation, and the service life of the quadrilateral reinforced concrete plate is prolonged. The storage cost and the transportation cost are effectively reduced, the workload in the construction process of a traditional laminated slab is reduced by arranging the additional steel bars in the groove holes in the abutted seams of the grooves, and the steel loss caused by corrosion of the horizontal steel bars is reduced.

Description

Technical Field

[0001] The utility model relates to a prefabricated plate, in particular to a prefabricated bottom plate without trusses and reinforcement bars at the ends of steel bars and a composite plate joint structure thereof. Background Art

[0002] Currently, in reinforced concrete composite slabs, precast concrete slabs are generally connected to each other through post-cast strips. Reinforcement bars need to extend from the ends of the precast concrete slabs. After the upper layer of concrete is poured, the reinforcement bars are anchored into the post-cast layer to ensure the continuity and integrity of the slab. The above construction method has good mechanical properties and is widely used, but the reinforcement bars at the ends of the slabs are not convenient for transportation of the precast slabs. The structure of the slab end supports is relatively complex, and the reinforcement bars are prone to deformation, affecting the quality of the precast slabs. The reinforcement bars at the ends of the slabs need to be aligned during construction, which increases the difficulty of construction. The reinforcement bars of the precast bottom slabs require grooves to be cut in the steel formwork to accommodate the reinforcement bars, resulting in poor versatility of the steel formwork and increased manufacturing costs. At the same time, the presence of truss steel bars makes it difficult to store and transport the precast slabs, increases the amount of steel used, increases the cost of the precast slabs, and makes it difficult to bury and lay pipelines in subsequent decoration and renovation work.

[0003] Currently, patent publication number CN203247746U discloses a zigzag prefabricated panel, comprising a panel body, bottom reinforcement, and truss reinforcement. The bottom reinforcement is arranged in two groups, vertically and horizontally, along the middle of the panel body. The truss reinforcement is fixed slightly above the middle of the panel body, and the ends of the panel body are zigzag-shaped. This utility model effectively solves the problems of on-site safety hazards, grout leakage, cold joints, and weakened beam sections caused by insufficient construction precision. It features a simple structure and easy on-site operation.

[0004] From the above-disclosed technical content, it can be seen that as an existing technology, the utility model with announcement number CN203247746U solves the problems of on-site safety hazards, leakage, cold joints and weakening of beam cross-sections caused by insufficient construction accuracy through protrusions. It has a simple structure and is easy to operate on site. However, it still has truss steel bars and does not solve the problems of complex structure and inconvenient transportation. Summary of the Invention

[0005] In response to the problems existing in the above-mentioned prior art, the utility model provides a prefabricated base plate without truss steel bar plates and a composite plate joint structure without reinforcement bars at the ends, which can reduce the amount of steel used, reduce storage costs and transportation costs, and can effectively reduce workload and reduce steel loss caused by reinforcement bar corrosion.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a prefabricated base plate without reinforcement at the end of a truss steel plate and a composite plate joint structure, comprising a side-grooved concrete prefabricated base plate, a groove joint, additional reinforcement in the slot holes and a concrete post-cast layer. The side-grooved concrete prefabricated base plate is a quadrilateral reinforced concrete plate, the orthogonal reinforcement inside the quadrilateral reinforced concrete plate does not extend out of the four sides, the lower surface is flat, and the upper surface is rough. The side of the side-grooved concrete prefabricated base plate is provided with equally spaced trapezoidal grooves to form trapezoidal protrusions; a groove joint is provided between two side-grooved concrete prefabricated base plates, a plurality of transversely installed additional reinforcements in the slot holes are arranged in the groove joint, the plurality of additional reinforcements in the slot holes are parallel to each other, one or two longitudinal reinforcements are installed on the plurality of additional reinforcements in the slot holes, and the side-grooved concrete prefabricated base plate, the groove joint and the additional reinforcement in the slot holes are sealed by a concrete post-cast layer.

[0007] In addition, the prefabricated bottom plate without truss steel plate ends and the composite plate joint structure thereof proposed in the above embodiment of the present invention can also have the following additional technical features:

[0008] As a further improvement of the present invention, the side grooves of the side-grooved concrete precast base plate are through grooves, and the grooves of the two side-grooved concrete precast base plates are placed opposite to each other with a spacing of 100 mm to 400 mm.

[0009] As a further improvement of the present invention, the rough surface of the side grooved concrete prefabricated bottom plate is uneven, and the depth of the unevenness is not less than 2 mm.

[0010] As a further improvement of the present invention, the depth of the groove on the side of the side grooved concrete prefabricated bottom plate is not less than 50 mm.

[0011] As a further improvement of the present invention, the diameter of the longitudinal reinforcement on the additional reinforcement in the slot hole is greater than or equal to the diameter of the orthogonal reinforcement in the side slotted concrete precast bottom plate, and the strength is HRB400 or HRB500.

[0012] As a further improvement of the present invention, the strength of the post-cast concrete layer is not lower than the strength of the side grooved concrete prefabricated bottom plate.

[0013] As a further improvement of the present invention, the side edges of the side-grooved concrete prefabricated bottom plate are provided with grooves at equal intervals to form rectangular protrusions.

[0014] Through the above scheme, the present invention has at least the following advantages: compared with conventional electrostatic precipitators, the orthogonal steel bars inside the quadrilateral reinforced concrete slab with side grooves do not protrude from the four sides, effectively reducing the amount of steel used, and preventing the protruding steel bars from being damaged during transportation, effectively reducing the storage cost and transportation cost, and by arranging additional steel bars in the slot holes at the groove joints, reducing the workload in the traditional composite slab construction process, and reducing the steel loss caused by the rust of the beard bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] Figure 2 It is a front view of the utility model;

[0017] Figure 3 This is a structural diagram of the utility model for installing additional steel bars in slot holes within the groove joints;

[0018] Figure 4 This is a schematic diagram of the trapezoidal raised structure of the side-grooved concrete prefabricated bottom plate of the present invention;

[0019] In the figure: 1. Precast concrete base plate with grooves on the side, 2. Grooved joints, 3. Additional steel bars in the grooves, 4. Post-cast concrete layer. DETAILED DESCRIPTION

[0020] The following describes the prefabricated bottom plate without trusses and reinforcement plates and the joint structure of the composite plate according to the present invention with reference to the accompanying drawings.

[0021] In Example 1 of the present application, Figures 1 to 3 As shown, the prefabricated base plate without truss steel plate ends and its composite plate joint structure (hereinafter referred to as "the present invention") include a side-grooved concrete prefabricated base plate 1, a groove joint 2, additional steel bars 3 in the slot holes and a concrete post-casting layer 4. The side-grooved concrete prefabricated base plate 1 is a quadrilateral reinforced concrete plate. The orthogonal steel bars inside the quadrilateral reinforced concrete plate do not extend out of the four sides. The lower surface is flat and the upper surface is rough. The side of the side-grooved concrete prefabricated base plate 1 is provided with equally spaced trapezoidal grooves to form trapezoidal protrusions, and the width of the groove is greater than or equal to 200 mm; there is a groove joint 2 between the two side-grooved concrete prefabricated base plates 1, and a plurality of transversely installed additional steel bars 3 in the slot holes are arranged in the groove joint 2. The plurality of additional steel bars 3 in the slot holes are parallel to each other, and one or two longitudinal steel bars are installed on the plurality of additional steel bars 3 in the slot holes. The side-grooved concrete prefabricated base plate 1, the groove joint 2 and the additional steel bars 3 in the slot holes are closed by the concrete post-casting layer 4. The thickness of the side grooved concrete prefabricated bottom plate 1 is 70 mm.

[0022] The utility model announcement number is CN203247746U, which is a zigzag prefabricated panel (hereinafter referred to as "the patent"). The patent solves the problems of on-site safety hazards, slurry leakage, cold joints and weakened beam sections caused by insufficient construction accuracy through protrusions. It has a simple structure and is easy to operate on site. However, it still has truss steel bars and does not solve the problems of complex structure and inconvenient transportation. The present invention effectively reduces the amount of steel used by preventing the orthogonal steel bars inside the quadrilateral reinforced concrete slab from extending out of the four sides through the side-grooved concrete prefabricated base plate 1, and prevents the extended steel bars from being damaged during transportation, thereby effectively reducing storage and transportation costs. The side grooves of the side-grooved concrete prefabricated base plate 1 are through grooves, and the grooves of the two side-grooved concrete prefabricated base plates 1 are placed opposite each other with a spacing of 100mm to 400mm.

[0023] The structure of the second embodiment is basically the same as that of the first embodiment, except that Figure 4 As shown, the side grooved concrete prefabricated bottom plate 1 has grooves with equal spacing on the side to form rectangular protrusions.

[0024] In order to further optimize the working efficiency of the present application and further enhance the bonding strength between the side slotted concrete precast base plate 1 and the concrete post-casting layer 4, the rough surface of the side slotted concrete precast base plate 1 is uneven, and the depth of the unevenness is not less than 2 mm. The depth of the groove on the side of the side slotted concrete precast base plate 1 is not less than 50 mm. To further enhance the overall strength of the side slotted concrete precast base plate 1 and the concrete post-casting layer 4, the diameter of the longitudinal steel bars on the additional steel bars 3 in the slot hole is greater than or equal to the diameter of the orthogonal steel bars in the side slotted concrete precast base plate 1, and the strength is HRB400 or HRB500. The strength of the concrete post-casting layer 4 is not lower than the strength of the side slotted concrete precast base plate 1.

[0025] During assembly, multiple side slotted concrete precast base plates 1 are arranged as needed, and a groove joint 2 is formed between two adjacent side slotted concrete precast base plates 1. Multiple transverse installation slotted holes with additional steel bars 3 are arranged in the groove joint 2. Each slot hole with additional steel bars 3 corresponds to a side slotted concrete precast base plate 1. Equally spaced trapezoidal grooves are opened on the side to form a trapezoidal protrusion. The additional steel bars 3 in the slot holes are fixed by longitudinal steel bars. Finally, concrete is poured to form a concrete post-cast layer 4, so that the side slotted concrete precast base plate 1, the additional steel bars 3 in the slot holes and the concrete post-cast layer 4 form a whole, and the construction is completed.

[0026] In summary, the prefabricated base plate without trusses and reinforcement bars at the ends of the composite plate and the composite plate joint structure of the embodiment of the present invention effectively reduce the steel consumption by notching the concrete prefabricated base plate 1 on the side and preventing the orthogonal reinforcement bars inside the quadrilateral reinforced concrete plate from extending out of the four sides, and prevent the extended reinforcement bars from being damaged during transportation, thereby effectively reducing the storage cost and transportation cost. By arranging additional reinforcement bars 3 in the slot holes at the groove joints 2, the workload in the traditional composite plate construction process is reduced, and the steel loss caused by the corrosion of the reinforcement bars is reduced.

[0027] Those skilled in the art will understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the present invention to these examples. Within the spirit and principles of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and many other variations exist for the various aspects of the present invention described above, which are not provided in detail for the sake of clarity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A prefabricated base plate without truss steel plate ends and a composite plate joint structure thereof, comprising a side grooved concrete prefabricated base plate (1), characterized in that: The side slotted concrete precast base plate (1) is a quadrilateral reinforced concrete plate, wherein the orthogonal steel bars inside the quadrilateral reinforced concrete plate do not extend out of the four sides, the lower surface is flat, and the upper surface is rough. The side of the side slotted concrete precast base plate (1) is provided with equally spaced trapezoidal grooves to form trapezoidal protrusions; a groove joint (2) is provided between the two side slotted concrete precast base plates (1), wherein a plurality of transversely installed slotted holes additional steel bars (3) are provided in the groove joint (2), the plurality of slotted holes additional steel bars (3) are parallel to each other, and one or two longitudinal steel bars are installed on the plurality of slotted holes additional steel bars (3); the side slotted concrete precast base plate (1), the groove joint (2) and the slotted holes additional steel bars (3) are sealed by a concrete post-casting layer (4).

2. The prefabricated bottom plate without truss steel plate ends and the composite plate joint structure according to claim 1 is characterized in that: The side grooves of the side grooved concrete prefabricated bottom plate (1) are through grooves, and the grooves of the two side grooved concrete prefabricated bottom plates (1) are placed opposite to each other with a spacing of 100mm to 400mm.

3. The prefabricated bottom plate without truss steel plate ends and the composite plate joint structure according to claim 2 is characterized in that: The rough surface of the side grooved concrete prefabricated bottom plate (1) is uneven, and the depth of the unevenness is not less than 2 mm.

4. The prefabricated bottom plate without truss steel plate ends and the composite plate joint structure thereof according to claim 1 is characterized in that: The depth of the groove on the side of the side grooved concrete prefabricated bottom plate (1) is not less than 50 mm.

5. The prefabricated bottom plate without truss steel plate ends and the composite plate joint structure thereof according to claim 4 is characterized in that: The diameter of the longitudinal reinforcement on the additional reinforcement (3) in the slot hole is greater than or equal to the diameter of the orthogonal reinforcement in the side slotted concrete prefabricated bottom plate (1), and the strength is HRB400 or HRB500.

6. The prefabricated bottom plate without truss steel plate ends and the composite plate joint structure thereof according to claim 1 is characterized in that: The strength of the concrete post-cast layer (4) is not lower than the strength of the side-grooved concrete prefabricated bottom plate (1).

7. The prefabricated bottom plate without truss steel plate ends and the composite plate joint structure thereof according to claim 1 is characterized in that: The side grooved concrete prefabricated bottom plate (1) is provided with grooves at equal intervals on the side to form rectangular protrusions.

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