Prefabricated bottom plate

Abstract

The utility model belongs to the technical field of building prefabricated parts, and particularly relates to a prefabricated bottom plate which comprises a longitudinal rib beam and a transverse rib beam, the longitudinal rib beam and the transverse rib beam are arranged in a cross-shaped structure, and the two adjacent side edges of a plate body are fixed to the side edge of the longitudinal rib beam and the side edge of the transverse rib beam respectively. Shear force teeth are arranged on the outer side edge of the plate body, through connecting holes are formed in upper grooves of the shear force teeth, the vertical supporting capacity of the prefabricated bottom plate is kept, by arranging the shear force teeth, the surface area of the side wall of the plate body is increased, later-poured concrete can make more contact with the side wall of the plate body, and therefore the bonding strength is improved. The shear teeth are of a downwards-concave structure, the influence on the strength of the prefabricated slab body is small, and the structure of the side wall of the slab body is reserved between the adjacent shear teeth, so that the vertical supporting capacity of the prefabricated bottom slab is kept, shear force can be effectively transmitted and dispersed, and the phenomenon of separation or cracking between the prefabricated slab and post-pouring concrete is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of building prefabricated parts, in particular to a prefabricated bottom plate. Background Art

[0002] Prefabricated base plates are ground foundation plates made of concrete, steel bars and other materials in prefabrication plants. They have high processing accuracy, regular shapes, easy installation and short construction periods, and are widely used in construction projects in various industries.

[0003] The shear teeth of the precast base plate are the connectors that transfer shear force between the precast plate and the post-cast concrete. Their main function is to increase the connection strength and stability between the precast plate and the post-cast concrete, ensuring that the two can work together and jointly withstand external forces.

[0004] When the precast base plate is in use, the frame beam can provide certain support to the precast base plate through the extended steel bars. However, the frame of the base plate is a planar structure. When in use, the shear force cannot be effectively dispersed, which can easily lead to separation or cracking between the precast plate and the post-poured concrete. Therefore, a precast base plate is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, the frame of the base plate is a planar structure, which cannot effectively disperse the shear force when in use, and easily leads to separation or cracking between the precast plate and the poured concrete. The utility model proposes a precast base plate, which is equipped with shear teeth at the edge of the plate body, thereby effectively dispersing the shear force and ensuring that there is no cracking between the precast plate and the poured concrete.

[0006] The technical solution adopted by the utility model to solve the technical problem is a prefabricated bottom plate, including a longitudinal rib beam and a transverse rib beam, wherein the longitudinal rib beam and the transverse rib beam are arranged in a cross-shaped structure;

[0007] The plate body is located in the intersection of the longitudinal rib beam and the transverse rib beam, and two adjacent side edges of the plate body are respectively fixed to the side edge of the longitudinal rib beam and the side edge of the transverse rib beam;

[0008] The outer side of the plate body is provided with shear teeth, and the upper groove of the shear teeth is provided with penetrating connection holes to maintain the vertical support capacity of the precast base plate, effectively transmit and disperse the shear force, and prevent separation or cracking between the precast plate and the post-cast concrete.

[0009] Preferably, rib longitudinal ribs are disposed transversely through the interior of the transverse ribs, and rib longitudinal ribs are also disposed transversely through the interior of the longitudinal ribs.

[0010] Preferably, gate-type rib stirrups are provided on the top and side surfaces of the longitudinal ribs and transverse ribs, and the two ends of the rib stirrups are respectively cast inside the longitudinal ribs and transverse ribs, so that the prefabricated base plate has higher strength and can be used as a prefabricated base plate of a bidirectional dense-rib composite floor to realize the corresponding floor construction.

[0011] Preferably, ribs are arranged at the bottom of the plate body, and ends of the ribs are cast in the bottom of the plate body. The ribs are located below the shear teeth, and the ribs are located between two adjacent shear teeth.

[0012] Preferably, the plate body is a concave structure, and the inner wall of the plate body is an inclined surface, which can increase the contact surface of casting and improve the force effect.

[0013] Preferably, an exhaust hole is opened at the bottom center of the plate body, through which the seepage water in the concrete can leak out, while better achieving the ventilation effect of the poured concrete, accelerating the solidification speed of the concrete, avoiding water accumulation in the holding tank during construction in the rainy season, and improving construction convenience.

[0014] Preferably, the upper and lower notches of the shear teeth are in an open state, and the upper and lower sides of the plate body are provided with U-shaped surrounding ribs, which pass through the upper and lower ends of the shear teeth respectively. Surrounding ribs are provided at the bottom of the plate body, which can improve the strength of the plate body, and the surrounding ribs intersect with the upper and lower notches of the shear teeth 8, which can better facilitate the auxiliary steel bars on the side and the bottom plate to be better tied and connected through wire during pouring, which is more convenient for subsequent concrete pouring.

[0015] The utility model is beneficial in that:

[0016] The utility model increases the surface area of ​​the side wall of the plate body by arranging shear teeth, and the concrete poured later can contact the side wall of the plate body more, thereby increasing the bonding strength; the shear teeth are a concave structure, which has little effect on the strength of the precast plate body, and the structure of the side wall of the plate body is retained between adjacent shear teeth, thereby maintaining the vertical supporting capacity of the precast base plate, and can effectively transmit and disperse the shear force, prevent the precast plate and the post-cast concrete from being separated or cracked, and solve the problems of weak concrete bonding strength, cumbersome processing and high cost of the current precast base plate. At the same time, a penetrating connection hole is arranged on the groove wall of the shear teeth, which can better facilitate the auxiliary steel bars on the side and the base plate to be better tied and connected through the wire during pouring, which is more convenient for subsequent concrete pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of Embodiment 1;

[0019] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the second embodiment;

[0020] Figure 3 This is a bottom-up structural diagram of Embodiment 2;

[0021] In the figure: 1. longitudinal rib beam, 2. transverse rib beam, 3. rib beam longitudinal reinforcement, 4. rib beam stirrups, 5. plate body, 6. exhaust hole, 7. connection hole, 8. shear tooth, 9. beard reinforcement, 10. surrounding rib reinforcement. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] See also Figure 1 As shown, a prefabricated bottom plate comprises: a longitudinal rib beam 1 and a transverse rib beam 2, wherein the longitudinal rib beam 1 and the transverse rib beam 2 are arranged in a cross-shaped structure;

[0025] The plate body 5 is located in the intersection of the longitudinal rib beam 1 and the transverse rib beam 2, and the two adjacent sides of the plate body 5 are respectively fixed to the side of the longitudinal rib beam 1 and the side of the transverse rib beam 2. The outer side of the plate body 5 is provided with a shearing tooth 8, and the upper groove of the shearing tooth 8 is provided with a penetrating connection hole 7. By providing the shearing tooth 8, the surface area of ​​the side wall of the plate body 5 is increased, and the concrete poured later can contact more with the side wall of the plate body, thereby increasing the bonding strength; the shearing tooth 8 is a concave structure, which has little effect on the strength of the prefabricated plate body, and the adjacent The structure of the side wall of the plate body 5 is retained between the shear teeth 8, so as to maintain the vertical support capacity of the precast base plate, effectively transmit and disperse the shear force, prevent the precast plate from being separated or cracked from the post-cast concrete, and solve the problems of weak concrete bonding strength, complicated processing and high cost of the current precast base plate. At the same time, a penetrating connection hole 7 is set on the groove wall of the shear teeth 8, which can better facilitate the auxiliary steel bars on the side and the base plate to be better tied and connected through wire during pouring, which is more convenient for subsequent concrete pouring.

[0026] The interior of the transverse rib beam 2 is laterally penetrated by rib longitudinal reinforcement 3, and the interior of the longitudinal rib beam 1 is also penetrated by rib longitudinal reinforcement 3. The top side surfaces of the longitudinal rib beam 1 and the transverse rib beam 2 are provided with gate-type rib stirrups 4, and the two ends of the rib stirrups 4 are respectively cast in the longitudinal rib beam 1 and the transverse rib beam 2. The longitudinal rib beam 1 and the transverse rib beam 2 are cross-shaped, so that the prefabricated bottom plate has higher strength and can be used as the prefabricated bottom plate of the bidirectional dense-rib composite floor to realize the corresponding floor construction.

[0027] The bottom of the plate body 5 is provided with ribs 9, and the ends of the ribs 9 are cast in the bottom of the plate body 5. The ribs 9 are located below the shear teeth 8. The ribs 9 are located between two adjacent shear teeth 8, which can facilitate the connection with other modules in the later casting, ensure the connection support effect, and be better used in subsequent casting operations.

[0028] The plate body 5 is a concave structure, and the inner wall of the plate body 5 is an inclined surface, which can increase the contact surface of casting and improve the force effect.

[0029] An exhaust hole 6 is provided at the bottom center of the plate body 5, through which water seepage in the concrete can be leaked out, thereby better achieving the ventilation effect on the poured concrete, accelerating the solidification speed of the concrete, avoiding water accumulation in the receiving tank during construction in the rainy season, and improving construction convenience.

[0030] Embodiment 2

[0031] See also Figure 2-3 As shown, the upper and lower notches of the shear teeth 8 are in an open state, and the upper and lower sides of the plate body 5 are provided with U-shaped surrounding ribs 10, and the surrounding ribs 10 pass through the upper and lower ends of the shear teeth 8 respectively. The upper and lower notches of the shear teeth 8 are in an open state, which effectively transmits and disperses the shear force, prevents the precast plate from being separated or cracked from the post-cast concrete, and better demoulding during casting. Surrounding ribs 10 are provided at the bottom of the plate body 5, which can improve the strength of the plate body 5, and the surrounding ribs 10 intersect with the upper and lower notches of the shear teeth 8, which can better facilitate the auxiliary steel bars on the side and the bottom plate to be better tied and connected through wire during casting, which is more convenient for subsequent concrete casting.

[0032] In the description of this specification, the basic principles, main features and advantages of the utility model are shown and described above. For those skilled in the art, they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model shall fall within the scope of the utility model claimed for protection.

Claims

1. A prefabricated base plate, characterized in that: include: A longitudinal rib beam (1), wherein the longitudinal rib beam (1) and the transverse rib beam (2) are arranged in a cross-shaped structure; A plate body (5), the plate body (5) being located in the intersection of the longitudinal rib beam (1) and the transverse rib beam (2), and two adjacent side edges of the plate body (5) being respectively fixed to the side edge of the longitudinal rib beam (1) and the side edge of the transverse rib beam (2); Shear teeth (8), the outer side of the plate body (5) is provided with a shear tooth (8), and the upper groove of the shear tooth (8) is provided with a penetrating connection hole (7); The upper and lower notches of the shear teeth (8) are in an open state, and the upper and lower sides of the plate body (5) are provided with U-shaped surrounding ribs (10), and the surrounding ribs (10) pass through the upper and lower ends of the shear teeth (8) respectively.

2. A prefabricated base plate according to claim 1, characterized in that: Rib longitudinal ribs (3) are arranged transversely through the interior of the transverse rib (2), and rib longitudinal ribs (3) are also arranged transversely through the interior of the longitudinal rib (1).

3. The prefabricated base plate according to claim 1, characterized in that: Gate-shaped rib stirrups (4) are provided on the top side surfaces of the longitudinal rib beam (1) and the transverse rib beam (2), and two ends of the rib stirrups (4) are cast inside the longitudinal rib beam (1) and the transverse rib beam (2), respectively.

4. The prefabricated base plate according to claim 1, characterized in that: The bottom of the plate body (5) is provided with a beard rib (9), and the end of the beard rib (9) is cast in the bottom of the plate body (5), the beard rib (9) is located below the shear teeth (8), and the beard rib (9) is located between two adjacent shear teeth (8).

5. The prefabricated base plate according to claim 4, characterized in that: The plate body (5) is a concave structure, and the inner wall of the plate body (5) is an inclined surface.

6. The prefabricated base plate according to claim 1, characterized in that: An exhaust hole (6) is provided at the center of the bottom of the plate body (5).

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