Prefabricated composite floor slab construction structure

Abstract

The utility model relates to a prefabricated composite floor slab construction structure, which belongs to the technical field of fabricated buildings and comprises a composite slab prefabricated layer, a composite slab cast-in-place layer, a cast-in-place beam belt wall and a cast-in-place wall. The laminated slab cast-in-place layer is poured on the laminated slab prefabricated layer; a first steel bar, a second steel bar, a third steel bar and a fourth steel bar are arranged in the laminated slab prefabricated layer, the first steel bar is horizontally arranged on the lower portion of the laminated slab prefabricated layer, and the two ends of the first steel bar extend into a beam body of the cast-in-place beam belt wall and a wall body of the cast-in-place wall correspondingly. The second steel bars are shorter than the laminated slab prefabricated layer; the third steel bar is vertically welded between the first steel bar and the second steel bar; the fourth reinforcing steel bars are broken line reinforcing steel bars and are poured between the laminated slab prefabricated layer and the laminated slab cast-in-place layer; fifth reinforcing steel bars, sixth reinforcing steel bars and seventh reinforcing steel bars are arranged in the laminated slab cast-in-place layer, and the fifth reinforcing steel bars are horizontally welded to the vertexes of all fold lines of the fourth reinforcing steel bars; the two ends of the seventh steel bar extend into the beam body of the cast-in-place beam belt wall and the wall body of the cast-in-place wall correspondingly, and the sixth steel bar is perpendicularly welded between the fifth steel bar and the seventh steel bar. The strength of the composite floor slab can be improved, and the connecting strength of the composite floor slab, the cast-in-place wall and the beam belt wall can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of assembled buildings, and specifically relates to a prefabricated composite floor slab construction structure. Background Art

[0002] Prefabricated buildings refer to buildings that transfer on-site operations in traditional construction methods to factories, where prefabricated parts are processed and manufactured in factories and then transported to construction sites for assembly and construction on site. The drop-down connection structure in prefabricated buildings is realized through prefabricated composite floor slabs. Prefabricated composite floor slabs include a lower prefabricated layer of composite slabs and a cast-in-place layer of composite slabs cast on the prefabricated layer of composite slabs.

[0003] During construction, the end faces of the precast layers of the composite slabs are in contact with the cast-in-place beams and beam-band walls, and the steel bars at both ends of the precast layers of the composite slabs extend into the cast-in-place walls and beam-band walls. The connection between the precast slabs and the cast-in-place walls and beam-band walls is achieved through the extended steel bars. Usually, the precast slabs are thin and have limited supporting strength. At the same time, the connection with the walls or beam-band walls is mainly achieved by the extended steel bars, resulting in a low connection strength between the composite floor slabs and the cast-in-place walls and beam-band walls. Utility Model Content

[0004] In order to overcome the problems existing in the background technology, the utility model provides a prefabricated composite floor construction structure, which can improve the strength of the composite floor and improve the connection strength between the composite floor and the cast-in-place wall and the beam-belt wall.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] The prefabricated composite floor construction structure comprises a composite slab prefabricated layer, a composite slab cast-in-place layer, a cast-in-place beam with wall, and a cast-in-place wall; the composite slab prefabricated layer is arranged between the cast-in-place beam with wall and the cast-in-place wall; the composite slab cast-in-place layer is cast on the composite slab prefabricated layer.

[0007] The prefabricated layer of the composite slab is provided with a first steel bar, a second steel bar, a third steel bar and a fourth steel bar. The first steel bar is horizontally arranged at the lower part of the prefabricated layer of the composite slab, and its two ends extend into the beam body of the cast-in-place beam-wall and the wall body of the cast-in-place wall respectively; the second steel bar is horizontally arranged, and its length is shorter than the prefabricated layer of the composite slab; the third steel bar is welded between the first steel bar and the second steel bar, and is perpendicular to the first steel bar and the second steel bar; the fourth steel bar is a broken line steel bar, the lower part of which is in the prefabricated layer of the composite slab, and the upper part is cast in the cast-in-place layer of the composite slab.

[0008] The fifth, sixth and seventh steel bars are arranged in the cast-in-place layer of the composite slab. The fifth steel bar is horizontally welded at the vertices of each fold line of the fourth steel bar, and its length is shorter than the prefabricated layer of the composite slab; both ends of the seventh steel bar are respectively provided with the beam body of the cast-in-place beam-wall and the wall body of the cast-in-place wall, and the end is provided with a bending head; the sixth steel bar is welded between the fifth and seventh steel bars, and is vertically welded to the fifth and seventh steel bars.

[0009] Preferably, the extension length of the first steel bar is not shorter than the center line of the cast-in-place beam-wall and the cast-in-place wall.

[0010] Preferably, the extension length of the seventh steel bar is not shorter than 2 / 3 of the cast-in-place beam-wall and the cast-in-place wall.

[0011] Preferably, the first steel bar is welded to the main reinforcement of the beam body of the cast-in-place beam-wall.

[0012] Preferably, the bending head of the first steel bar is an upward 90-degree bending head, and the bending head is welded to the main reinforcement of the beam body of the cast-in-place beam-with-wall.

[0013] Preferably, the cast-in-place beam-belt wall is divided into a lower first-casting section and an upper later-casting section; the cast-in-place wall includes a lower first-casting section and an upper later-casting section; the prefabricated layer of the composite slab is arranged at the bottom of the upper later-casting section.

[0014] Beneficial effects of the utility model:

[0015] The utility model can increase the strength of the composite floor slab by designing the steel bar structure in the prefabricated layer and the cast-in-place layer of the composite slab; in addition, by partially arranging the fold line steel bars in the prefabricated layer of the composite slab and partially arranging them in the cast-in-place layer of the composite slab, and respectively welding the third steel bar and the fifth steel bar to the upper and lower vertices of the fold line steel bars, the deformation resistance of the composite slab is increased, and it also has a certain earthquake resistance.

[0016] The utility model increases the connection strength between the composite floor slab and the cast-in-place beam belt wall and the cast-in-place wall by designing the structure and length of the first steel bar of the composite slab prefabricated layer and the seventh steel bar in the composite slab cast-in-place layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the rigid structure of the utility model;

[0019] In the figure, 1-precast layer of composite slab, 2-cast-in-place layer of composite slab, 3-cast-in-place beam with wall, 4-cast-in-place wall, 5-first steel bar, 6-second steel bar, 7-third steel bar, 8-fourth steel bar, 9-fifth steel bar, 10-sixth steel bar, 11-seventh steel bar. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technicians.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0022] like Figure 1-2 As shown, the prefabricated composite floor construction structure includes a composite slab prefabricated layer 1, a composite slab cast-in-place layer 2, a cast-in-place beam-belt wall 3 and a cast-in-place wall 4.

[0023] The precast layer 1 of the composite slab is provided with a first steel bar 5, a second steel bar 6, a third steel bar 7 and a fourth steel bar 8. The first steel bar 5 is horizontally arranged at the lower part of the precast layer 1 of the composite slab, and its two ends extend to the beam body of the cast-in-place beam with wall 3 and the wall body of the cast-in-place wall 4 respectively, and the extension length is not shorter than the center line of the beam body of the cast-in-place beam with wall 3 and the wall body of the cast-in-place wall 4. The second steel bar 6 is horizontally arranged, and its length is shorter than the precast layer 1 of the composite slab; the third steel bar 7 is welded between the first steel bar 5 and the second steel bar 6, and is welded vertically to the first steel bar 5 and the second steel bar 6. The fourth steel bar 8 is a broken line steel bar, the lower part of which is in the precast layer 1 of the composite slab, and the upper part is cast in the cast-in-place layer 2 of the composite slab.

[0024] The cast-in-place layer 2 of the composite slab is provided with a fifth steel bar 9, a sixth steel bar 10 and a seventh steel bar 11. The fifth steel bar 9 is horizontally welded to the vertices of each fold line of the fourth steel bar 8, and its length is shorter than the prefabricated layer 1 of the composite slab. Both ends of the seventh steel bar 11 are provided with extensions to the beam body of the cast-in-place beam with wall 3 and the wall body of the cast-in-place wall 4, respectively, and the extension length is not shorter than 2 / 3 of the beam body of the cast-in-place beam with wall 3 and the wall body of the cast-in-place wall 4. Both ends of the seventh steel bar 11 are provided with 90-degree bending heads bent upward. The sixth steel bar 10 is welded between the fifth steel bar 9 and the seventh steel bar 11, and is vertically welded to the fifth steel bar 9 and the seventh steel bar 11.

[0025] The third steel bar 7 and the sixth steel bar 10 are staggered up and down, the fifth steel bar 9 and the second steel bar 6 are welded to the vertices of each fold line of the fourth steel bar 8, and the fourth steel bar 8 is connected between the prefabricated layer 1 of the composite board and the cast-in-place layer 2 of the composite board. Its fold line structure can increase the length of the steel bar in the prefabricated layer 1 of the composite board and the cast-in-place layer 2 of the composite board, increase the connection firmness between the two, and have a certain earthquake resistance. The fifth steel bar 9 and the second steel bar 6 are welded to the vertices of each fold line of the fourth steel bar 8, and the welding relationship between the second steel bar 6, the third steel bar 7 and the first steel bar 5, and the welding relationship between the fifth steel bar 9, the sixth steel bar 10 and the seventh steel bar 11, increase the strength of the composite board as a whole.

[0026] The structure and length design of the first steel bar 5 and the seventh steel bar 11 in the cast-in-place layer 2 of the composite slab increase the connection strength between the composite slab and the cast-in-place beam belt wall 3 and the cast-in-place wall 4. The vertical staggered design of the third steel bar 7 and the sixth steel bar 10 can increase the horizontal and vertical force bearing capacity of the entire composite slab and increase its strength.

[0027] The cast-in-place beam-with-wall 3 and the cast-in-place wall 4 are divided into a lower first-casting section and an upper later-casting section, that is, the cast-in-place beam-with-wall 3 and the cast-in-place wall 4 are cast in sections. The lower first-casting section is cast first. After the lower first-casting section has been cast for 5 days and hardened and has good strength and hardness, the construction of the composite floor slab and the upper later-casting section is carried out.

[0028] The end portions of both ends of the precast layer 1 of the composite slab are respectively supported on the upper end surface of the lower first casting section, and then a formwork is set below the precast layer 1 of the composite slab. The formwork plays the role of supporting the precast layer 1 of the composite slab, and it needs to be removed after construction (the formwork is not shown in the attached figure). After the precast layer 1 of the composite slab is firmly supported, the steel bars in the cast-in-place layer 2 of the composite slab are welded: first weld the fifth steel bar 9 to the vertices of each fold line of the fourth steel bar 8, and then weld the sixth steel bar 10 vertically between the fifth steel bars 9 parallel to each other, and then weld the seventh steel bar 11. When welding the seventh steel bar 11, the bending head needs to face upward. After the steel bar welding is completed, the casting of the cast-in-place layer 2 of the composite slab and the upper post-casting section of the cast-in-place beam with wall 3 and cast-in-place wall 4 is carried out simultaneously.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A prefabricated composite floor construction structure, characterized in that: It includes a prefabricated layer of a composite slab, a cast-in-place layer of a composite slab, a cast-in-place beam with wall, and a cast-in-place wall; the prefabricated layer of the composite slab is arranged between the cast-in-place beam with wall and the cast-in-place wall; the cast-in-place layer of the composite slab is cast on the prefabricated layer of the composite slab; The prefabricated layer of the composite slab is provided with a first steel bar, a second steel bar, a third steel bar and a fourth steel bar. The first steel bar is horizontally arranged at the lower part of the prefabricated layer of the composite slab, and the two ends extend to the beam body of the cast-in-place beam-with-wall and the wall body of the cast-in-place wall respectively; the second steel bar is horizontally arranged, and the length is shorter than the prefabricated layer of the composite slab; the third steel bar is welded between the first steel bar and the second steel bar, and is perpendicular to the first steel bar and the second steel bar; the fourth steel bar is a broken line steel bar, the lower part of which is in the prefabricated layer of the composite slab, and the upper part is cast in the cast-in-place layer of the composite slab; The fifth, sixth and seventh steel bars are arranged in the cast-in-place layer of the composite slab. The fifth steel bar is horizontally welded at the vertices of each fold line of the fourth steel bar, and its length is shorter than the prefabricated layer of the composite slab; both ends of the seventh steel bar are respectively provided with the beam body of the cast-in-place beam-wall and the wall body of the cast-in-place wall, and the end is provided with a bending head; the sixth steel bar is welded between the fifth and seventh steel bars, and is vertically welded to the fifth and seventh steel bars.

2. The prefabricated composite floor construction structure according to claim 1, characterized in that: The extension length of the first steel bar is not shorter than the center line of the cast-in-place beam-wall and the cast-in-place wall.

3. The prefabricated composite floor construction structure according to claim 1, characterized in that: The extension length of the seventh steel bar is not shorter than 2 / 3 of the cast-in-place beam-wall and the cast-in-place wall.

4. The prefabricated composite floor construction structure according to claim 1, characterized in that: The first steel bar is welded to the main reinforcement of the beam body of the cast-in-place beam-with-wall.

5. The prefabricated composite floor construction structure according to claim 1, characterized in that: The bending head of the first steel bar is an upward 90-degree bending head, and the bending head is welded to the main reinforcement of the beam body of the cast-in-place beam with wall.

6. The prefabricated composite floor construction structure according to claim 1, characterized in that: The cast-in-place beam-belt wall is divided into a lower first-casting section and an upper later-casting section; the cast-in-place wall includes a lower first-casting section and an upper later-casting section; the prefabricated layer of the composite slab is arranged at the bottom of the upper later-casting section.

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