Sandwich heat preservation recycled concrete composite floor slab structure

Abstract

The utility model relates to the technical field of concrete floor slab structures, in particular to a sandwich heat preservation recycled concrete composite floor slab structure which comprises a prefabricated composite slab, a cast-in-place concrete layer is poured on the top of the prefabricated composite slab, and a functional layer is fixedly arranged on the top of the cast-in-place concrete layer. A heat preservation layer is arranged in the prefabricated laminated slab, and a connection reinforcing assembly is arranged among the prefabricated laminated slab, the heat preservation layer and the cast-in-place concrete layer. The connection reinforcing assembly comprises fixing steel bars embedded in the heat preservation layer and the cast-in-place concrete layer, and fixing steel pipes of hollow structures are welded to the tops of the fixing steel bars. A steel wire mesh is embedded in the bottom of the heat preservation layer. The connection strength between the cast-in-place concrete layer and the prefabricated laminated slab is enhanced through the arranged fixing steel pipes and the fixing steel bars, and meanwhile the integrity of the heat preservation layer is guaranteed while the connection strength between the prefabricated laminated slab and the heat preservation layer is enhanced through the steel wire meshes and the fixing steel bars.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete floor slab structures, in particular to a sandwich thermal insulation recycled concrete composite floor slab structure. Background Art

[0002] Composite floor slabs are assembled monolithic slabs made of precast panels and cast-in-place reinforced concrete layers. To improve the functionality of the composite floor slab, an insulation layer made of high-efficiency insulation materials such as polystyrene foam, polyurethane foam, or rock wool is used between the precast panels and the cast-in-place reinforced concrete layer. The precast panels and the cast-in-place reinforced concrete layer can be made of recycled concrete materials, improving the environmental protection and energy saving effects of the composite floor slab.

[0003] The public technical solution with the current announcement number CN214461609U discloses a sandwich insulation recycled concrete composite floor structure, which includes a cast-in-place recycled concrete slab, a precast recycled concrete slab, a lightweight aggregate filling layer, a modified polypropylene insulation layer, a polyurethane waterproof coating waterproof layer, a fine stone concrete leveling layer, and a cement mortar plaster layer. The modified polypropylene insulation layer is placed between the cast-in-place recycled concrete slab and the precast recycled concrete slab, and the cast-in-place recycled concrete slab and the precast recycled concrete slab are connected by truss steel bars.

[0004] When the above technical solution is actually implemented, the modified polypropylene insulation layer is usually a plate-like structure, and the truss steel bars with an inverted V-shaped structure are directly inserted into the modified polypropylene insulation layer. When the ends of the truss steel bars are inserted into the modified polypropylene insulation layer, the failure surface is a long strip structure. The truss steel bars may move inside the modified polypropylene insulation layer, and the connection is not stable. In addition, the cast-in-place recycled concrete slab is only connected through the ends of the truss steel bars, and the connection strength is average. Summary of the Invention

[0005] The purpose of the present utility model is to provide a sandwich insulated recycled concrete composite floor structure, which can increase the connection strength between the cast-in-place concrete layer and the prefabricated composite slab by setting fixed steel pipes and fixed steel bars, and at the same time strengthen the connection strength between the prefabricated composite slab and the insulation layer by steel wire mesh and fixed steel bars, while ensuring the integrity of the insulation layer, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sandwich insulated recycled concrete composite floor structure, comprising a prefabricated composite slab, a cast-in-place concrete layer cast on top of the prefabricated composite slab, a functional layer fixedly provided on top of the cast-in-place concrete layer, an insulation layer provided inside the prefabricated composite slab, and connection reinforcement components provided between the prefabricated composite slab, the insulation layer, and the cast-in-place concrete layer;

[0007] The connection reinforcement assembly includes fixed steel bars embedded in the insulation layer and the cast-in-place concrete layer, and a fixed steel pipe with a hollow structure is welded to the top of the fixed steel bars;

[0008] A steel mesh is embedded in the bottom of the thermal insulation layer, and the steel mesh is fixed inside the prefabricated composite board.

[0009] Preferably, a placement groove is provided on the top of the prefabricated composite plate, and the placement groove and the prefabricated composite plate are integrally formed by a mold.

[0010] Preferably, the steel mesh is embedded and fixed inside the placement groove, and the placement groove is adapted to the outer dimensions of the thermal insulation layer.

[0011] Preferably, the contact surface between the prefabricated composite slab and the cast-in-place concrete layer is set to be a rough surface.

[0012] Preferably, the connection reinforcement assembly further comprises two groups of steel bar supports welded to the bottom of the fixed steel bar, and the steel bar supports and the fixed steel bar form a triangular structure.

[0013] Preferably, a hook is provided at the end of the steel bar support, and a longitudinal steel bar running through the interior of the prefabricated composite plate is welded above the hook.

[0014] Preferably, a reinforcing steel bar is welded below the fixed steel bar, and transverse steel bars are welded on the left and right sides of the reinforcing steel bar, and the ends of the transverse steel bars are fixedly welded to the longitudinal steel bars.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The fixed steel pipes and fixed steel bars are used to increase the connection strength between the cast-in-place concrete layer and the precast composite slab. Since the contact surface between the precast composite slab and the cast-in-place concrete layer is rough, the adhesion between the cast-in-place concrete layer and the precast composite slab can be increased and strengthened.

[0017] 2. The wire mesh and fixed steel bars can strengthen the connection strength between the prefabricated composite panel and the insulation layer while ensuring the integrity of the insulation layer. At the same time, the fixed steel bars directly penetrate the insulation layer, and the contact surface with the insulation layer is a circular hole structure. The fixed steel pipes are welded on the surface of the fixed steel bars to perform secondary positioning of the insulation layer, further preventing the sandwiched insulation layer from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the prefabricated composite panel of the present invention;

[0021] Figure 3 This is a schematic structural diagram of the wire mesh of the present utility model;

[0022] Figure 4 It is a structural schematic diagram of the connection reinforcement component of the present utility model.

[0023] Description of reference numerals:

[0024] 1. Functional layer; 2. Cast-in-place concrete layer; 3. Precast composite slab; 4. Connection reinforcement components; 401. Fixed steel pipe; 402. Fixed steel bars; 403. Steel bar bracket; 404. Longitudinal steel bars; 405. Reinforcement steel bars; 406. Transverse steel bars; 5. Insulation layer; 6. Placement groove; 7. Wire mesh. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The utility model provides a technical solution:

[0027] See also Figures 1 to 4 A sandwich insulated recycled concrete composite floor structure includes a prefabricated composite panel 3, a cast-in-place concrete layer 2 is cast on the top of the prefabricated composite panel 3, and a functional layer 1 is fixedly arranged on the top of the cast-in-place concrete layer 2, an insulation layer 5 is arranged inside the prefabricated composite panel 3, and a connection reinforcement component 4 is provided between the prefabricated composite panel 3, the insulation layer 5 and the cast-in-place concrete layer 2;

[0028] The connection reinforcement assembly 4 includes a fixed steel bar 402 embedded in the insulation layer 5 and the cast-in-place concrete layer 2, and a fixed steel pipe 401 with a hollow structure is welded to the top of the fixed steel bar 402;

[0029] A steel mesh 7 is embedded in the bottom of the thermal insulation layer 5 , and the steel mesh 7 is fixed inside the prefabricated composite panel 3 .

[0030] By adopting the above technical solution, a prefabricated composite panel 3 is manufactured in a factory, and after the prefabricated composite panel 3 is hoisted to a designated position, recycled concrete is poured on the top of the prefabricated composite panel 3 to form a cast-in-place concrete layer 2. During pouring, the recycled concrete is simultaneously poured into the interior of the fixed steel pipe 401. Finally, a functional layer 1 is set on the top of the cast-in-place concrete layer 2. The functional layer 1 can be selected from waterproof layer, fireproof layer and thermal insulation layer according to needs, and can refer to the construction standards of existing functional walls. Since a steel mesh 7 is set between the thermal insulation layer 5 and the prefabricated composite panel 3, the steel mesh 7 can be completely embedded in the interior of the prefabricated composite panel 3 as a whole, thereby improving the thermal insulation effect of the prefabricated composite panel 3.

[0031] Specifically, such as Figure 3 As shown, a placement groove 6 is provided on the top of the prefabricated composite panel 3, and the placement groove 6 and the prefabricated composite panel 3 are integrally formed by a mold, a steel mesh 7 is embedded and fixed inside the placement groove 6, and the placement groove 6 is adapted to the outer dimensions of the insulation layer 5, and the contact surface between the prefabricated composite panel 3 and the cast-in-place concrete layer 2 is set to a rough surface.

[0032] By adopting the above technical solution, the placement groove 6 is made through a mold to form a prefabricated composite panel 3, and the fixed steel pipe 401 is passed through the inside of the cast-in-place concrete layer 2, thereby strengthening the connection strength between the cast-in-place concrete layer 2 and the prefabricated composite panel 3. Since the contact surface between the prefabricated composite panel 3 and the cast-in-place concrete layer 2 is a rough surface, the adhesion between the cast-in-place concrete layer 2 and the prefabricated composite panel 3 is increased and strengthened.

[0033] Specifically, such as Figure 4 As shown, the contact surface between the prefabricated composite slab 3 and the cast-in-place concrete layer 2 is set to a rough surface, and the connection reinforcement component 4 also includes two groups of steel bar supports 403 welded to the bottom of the fixed steel bar 402, and the steel bar supports 403 and the fixed steel bar 402 form a triangular structure, and the end of the steel bar support 403 is provided with a hook, and the upper part of the hook is welded with a longitudinal steel bar 404 running through the inside of the prefabricated composite slab 3, and the bottom of the fixed steel bar 402 is welded with a reinforcing steel bar 405, and the left and right sides of the reinforcing steel bar 405 are welded with transverse steel bars 406, and the end of the transverse steel bar 406 is fixedly welded to the longitudinal steel bar 404.

[0034] By adopting the above technical solution, during the production, the longitudinal steel bars 404, the transverse steel bars 406, the steel bar supports 403 and the fixed steel bars 402 are first welded together to form a steel truss, and the steel truss is placed in a mold, and recycled concrete is poured into the mold. After defoaming, an upper mold slightly deeper than the placement groove 6 is set on the top of the concrete, and a slot hole adapted to the position of the fixed steel bars 402 is opened on the top plate of the upper mold to form a groove for the prefabricated composite plate 3. Subsequently, the wire mesh 7 is placed in the groove, and a certain amount of recycled concrete is poured into the groove. After solidification, the placement groove 6 is formed. At this time, the wire mesh 7 can be fixed inside the placement groove 6, and the surface is higher than the wire mesh 7, which is convenient for connecting the insulation layer 5, and the steel pipe 401 is welded and fixed on the top of the insulation layer 5.

[0035] Working principle: first weld the longitudinal steel bars 404, the transverse steel bars 406, the steel bar supports 403 and the fixed steel bars 402 to form a steel truss, and place the steel truss in a mold, use recycled concrete to pour into the mold, after defoaming, set an upper mold slightly deeper than the placement groove 6 on the top of the concrete, and open a slot hole on the top plate of the upper mold that matches the position of the fixed steel bars 402 to form a groove for the prefabricated composite plate 3. Subsequently, place the wire mesh 7 in the groove, and then pour a certain amount of recycled concrete into the groove. After solidification, a placement groove 6 is formed. At this time, the wire mesh 7 can be fixed inside the placement groove 6, and the surface The surface is higher than the wire mesh 7, the insulation layer 5 passes through the fixed steel bars 402 and presses the insulation layer 5, so that the wire mesh 7 is completely embedded in the insulation layer 5, and the fixed steel pipe 401 is welded on the top of the insulation layer 5 to form a complete prefabricated composite board 3. After the prefabricated composite board 3 is hoisted to the designated position, recycled concrete is poured on the top of the prefabricated composite board 3 to form a cast-in-place concrete layer 2. During pouring, the recycled concrete is simultaneously poured into the inside of the fixed steel pipe 401. Finally, a functional layer 1 is set on the top of the cast-in-place concrete layer 2. The functional layer 1 can be selected from a waterproof layer, a fireproof layer and an insulation layer as needed, and can refer to the construction standards of existing functional walls.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sandwich thermal insulation recycled concrete composite floor structure, comprising a prefabricated composite slab (3), characterized in that: A cast-in-situ concrete layer (2) is cast on the top of the prefabricated composite panel (3), and a functional layer (1) is fixedly provided on the top of the cast-in-situ concrete layer (2); a thermal insulation layer (5) is provided inside the prefabricated composite panel (3), and a connection reinforcement component (4) is provided between the prefabricated composite panel (3), the thermal insulation layer (5) and the cast-in-situ concrete layer (2); The connection reinforcement assembly (4) includes a fixed steel bar (402) embedded in the insulation layer (5) and the cast-in-place concrete layer (2), and a fixed steel pipe (401) with a hollow structure is welded to the top of the fixed steel bar (402); A steel mesh (7) is embedded in the bottom of the thermal insulation layer (5), and the steel mesh (7) is fixed inside the prefabricated composite panel (3).

2. The sandwich thermal insulation recycled concrete composite floor structure according to claim 1, characterized in that: A placement groove (6) is provided on the top of the prefabricated composite plate (3), and the placement groove (6) and the prefabricated composite plate (3) are integrally formed by a mold.

3. The sandwich insulation recycled concrete composite floor structure according to claim 2, characterized in that: The steel wire mesh (7) is embedded and fixed inside the placement groove (6), and the placement groove (6) is adapted to the outer dimensions of the thermal insulation layer (5).

4. The sandwich thermal insulation recycled concrete composite floor structure according to claim 3, characterized in that: The contact surface between the prefabricated composite slab (3) and the cast-in-situ concrete layer (2) is set as a rough surface.

5. The sandwich thermal insulation recycled concrete composite floor structure according to claim 4, characterized in that: The connection reinforcement assembly (4) further comprises two sets of steel bar brackets (403) welded to the bottom of the fixed steel bar (402), and the steel bar brackets (403) and the fixed steel bar (402) form a triangular structure.

6. The sandwich thermal insulation recycled concrete composite floor structure according to claim 5, characterized in that: A hook is provided at the end of the steel bar support (403), and a longitudinal steel bar (404) is welded above the hook and passes through the interior of the prefabricated composite plate (3).

7. The sandwich thermal insulation recycled concrete composite floor structure according to claim 6, characterized in that: A reinforcing steel bar (405) is welded below the fixed steel bar (402), and transverse steel bars (406) are welded on the left and right sides of the reinforcing steel bar (405). The ends of the transverse steel bars (406) are fixedly welded to the longitudinal steel bars (404).

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