Combined cast-in-place hollow box core mold

Abstract

The utility model relates to the technical field of combined mandrels, in particular to a combined cast-in-place hollow box mandrel which comprises longitudinal steel bars, transverse steel bars, box assemblies, concrete cushion blocks and plastic strips, each box assembly is of a square box structure and is hollow, and the side walls of the two box assemblies can be attached to each other to form a box combination. The longitudinal reinforcing steel bars and the transverse reinforcing steel bars are evenly distributed on the upper side and the lower side of the box body assembly, the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are perpendicular to each other, and the shorter one of the longitudinal reinforcing steel bars and the transverse reinforcing steel bars is arranged close to the box body assembly. According to the core mold, the hollow box body is arranged, the plastic strips are laid on the hollow box body, the stress area is increased, the pressing effect on the hollow box body is reduced, additional stirrup and rib gaps are formed in the rib distribution space, and the structural strength of the core mold in the gaps of the hollow box body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of combined core molds, in particular to a combined cast-in-situ hollow box core mold. Background Art

[0002] Box core molds are widely used in the construction of cast-in-place concrete floors, walls, and other structures. Their use improves construction efficiency while ensuring the quality of the finished product. The box components in the box core mold are usually designed with a hollow structure to reduce weight. They can also be designed into different geometric shapes according to specific needs, such as rectangles, circles, or polygons. However, existing box core mold technology has the following disadvantages:

[0003] During the construction of the hollow box core mold, steel bars and concrete pads are placed on the upper side of the box components. Operators step on the steel bars during construction, often causing the precast concrete pads to sink deep into the box, reducing the contact area between the steel bars and the concrete, and lowering their bond strength. At the same time, the gaps between the box components are not additionally reinforced, affecting the quality of the project entity.

[0004] Chinese patent publication CN206635811U discloses an adjustable core-pulling formwork for pipe gallery construction. The formwork is adjusted in height by rotating an adjustment screw with a socket wrench. However, the document does not disclose how to address the issues of precast concrete pads sinking deep into the box, reducing their grip, and the lack of additional reinforcement in the gaps between box components, which affects the quality of the project.

[0005] In summary, how to design a modular cast-in-place hollow box core mold that can solve the problem of precast concrete pads sinking deep into the box and provide additional reinforcement for the gaps between box components has become a problem that needs to be solved at present. Utility Model Content

[0006] The purpose of the utility model is to provide a combined cast-in-situ hollow box core mold to solve the above problems.

[0007] In order to achieve the above objectives, the following technical solutions are provided:

[0008] The utility model provides a kind of combined cast-in-place hollow box core mould, including: longitudinal reinforcement, transverse reinforcement, box assembly, concrete cushion and plastic strip, the box assembly is square box structure, wherein empty setting, the side wall of two box assembly can be mutually adhering configuration, to form box combination in turn, the longitudinal reinforcement and transverse reinforcement are evenly arranged in the upper and lower sides of box assembly, the longitudinal reinforcement and transverse reinforcement are arranged perpendicular to each other, and the shorter one of the longitudinal reinforcement and transverse reinforcement is close to box assembly, the longer one of the shorter one is set outside, the plastic strip is symmetrically arranged on the top and bottom of box assembly, the concrete cushion is set along the arrangement direction of plastic strip, part of the longitudinal reinforcement and transverse reinforcement are arranged on the top and bottom of box assembly.

[0009] Preferably, the longitudinal reinforcement and transverse reinforcement are fixedly connected, and the hollow box core mould further comprises an additional stirrup, both ends of the additional stirrup are bent and fixedly connected with the shorter one of the longitudinal reinforcement and transverse reinforcement.

[0010] Preferably, the longitudinal reinforcement is arranged along the transverse direction, the transverse reinforcement is arranged along the longitudinal direction, and a space for arranging reinforcement is formed between the box assemblies that are not in close contact.

[0011] Preferably, the hollow box core mould further comprises a rib, and the rib is arranged in the space for arranging reinforcement.

[0012] Preferably, the concrete cushion is provided with a groove on the top and a through hole.

[0013] Preferably, a binding wire is arranged in the through hole of the concrete cushion, the shorter one of the longitudinal reinforcement and transverse reinforcement arranged on the top and bottom of the box assembly is arranged on the groove and fixedly connected with the concrete cushion by the binding wire.

[0014] The utility model has the advantages that:

[0015] 1. By arranging the longitudinal reinforcement and transverse reinforcement, the shorter one of the longitudinal reinforcement and transverse reinforcement is adhered to the concrete cushion, and a plastic strip is laid on the hollow box, so as to increase the stress area and reduce the compression effect on the hollow box.

[0016] 2. The utility model is provided with a through hole in the concrete cushion, so as to facilitate the binding wire to pass through the through hole and be tightly fastened on the reinforcement, so that the concrete cushion can ensure the thickness of the reinforcement protective layer, and the weight of the concrete cushion is reduced, the extrusion effect of the concrete cushion on the hollow box is reduced, and the deformation of the hollow box is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structural schematic view of the utility model;

[0018] Fig. 2 It is a matching schematic view of the box assembly and the space for arranging steel bars;

[0019] Fig. 3 It is a structural schematic view of the concrete cushion block;

[0020] In the drawing:

[0021] 1-longitudinal steel bar, 2-transverse steel bar, 3-box assembly, 4-concrete cushion block, 5-plastic strip, 6-additional stirrup, 7-space for arranging steel bars, 8-rib, 9-groove, 10-through hole. DETAILED DESCRIPTION

[0022] The technical solutions of the schematic views in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] As shown in the drawing, Figs. 1-3 A combined cast-in-situ hollow box core mold comprises longitudinal steel bars 1, transverse steel bars 2, box assemblies 3, concrete cushion blocks 4 and plastic strips 5. The box assemblies 3 are square box structures with spaces arranged therein. The side walls of two box assemblies 3 can be arranged to abut against each other, thereby forming a box assembly. The longitudinal steel bars 1 and the transverse steel bars 2 are arranged on the upper and lower sides of the box assemblies 3. The longitudinal steel bars 1 and the transverse steel bars 2 are arranged perpendicularly to each other. The shorter one of the two is arranged close to the box assembly 3, and the longer one is arranged outside the shorter one. The plastic strips 5 are symmetrically arranged on the top and bottom surfaces of the box assemblies 3. The concrete cushion blocks 4 are arranged along the arrangement direction of the plastic strips 5. Part of the longitudinal steel bars 1 and the transverse steel bars 2 are arranged on the top and bottom surfaces of the box assemblies 3.

[0024] In some embodiments, the longitudinal steel bars 1 and the transverse steel bars 2 are fixedly connected. The hollow box core mold further comprises additional stirrups 6. The two ends of the additional stirrups 6 are bent and fixedly connected to the shorter one of the longitudinal steel bars 1 and the transverse steel bars 2.

[0025] In some embodiments, the longitudinal steel bars 1 are arranged along the transverse direction, and the transverse steel bars 2 are arranged along the longitudinal direction. The space for arranging steel bars 7 is formed between the box assemblies 3 arranged not to abut against each other. Part of the longitudinal steel bars 1 and the transverse steel bars 2 are arranged at the space for arranging steel bars 7.

[0026] In some embodiments, the hollow box core mold further comprises a rib 8 arranged in the space 7; by arranging the longitudinal steel bars 1 and the transverse steel bars 2, using the shorter one of the two to adhere to the concrete cushion 4, and laying the plastic strip 5 on the hollow box, the stress area is increased, the pressing effect on the hollow box is reduced, and the additional hoop 6 and the rib 8 gap are arranged at the space 7, thereby improving the structural strength of the core mold at the hollow box gap;

[0027] In some embodiments, the concrete cushion 4 is provided with a groove 9 at the top and a through hole 10;

[0028] In some embodiments, the through hole 10 of the concrete cushion 4 is provided with a binding wire, the shorter one of the longitudinal steel bars 1 and the transverse steel bars 2 arranged on the top and bottom surfaces of the box assembly 3 is arranged on the groove 9, and is fixedly connected with the concrete cushion 4 through the binding wire; the through hole 10 is prearranged on the concrete cushion 4, which facilitates the binding wire to pass through the through hole 10, thereby being tightly bound on the steel bar, so that the concrete cushion 4 plays a role in ensuring the thickness of the steel bar protective layer, and the weight of the concrete cushion 4 is reduced, the extrusion effect of the concrete cushion 4 on the hollow box is reduced, and the deformation of the hollow box is prevented.

Claims

1. A combined cast-in-place hollow box core mold, characterized in that: include: A longitudinal steel bar (1), a transverse steel bar (2), a box assembly (3), a concrete pad (4) and a plastic strip (5), wherein the box assembly (3) is a square box structure with a hollow arrangement, and the side walls of the two box assemblies (3) can be fitted together to form a box assembly, wherein the longitudinal steel bar (1) and the transverse steel bar (2) are arranged on the upper and lower sides of the box assembly (3), wherein the longitudinal steel bar (1) and the transverse steel bar (2) are arranged perpendicular to each other, and the shorter of the longitudinal steel bar (1) and the transverse steel bar (2) is arranged close to the box assembly (3), and the longer of the two is arranged outside the shorter one, wherein the plastic strip (5) is symmetrically arranged on the top and bottom surfaces of the box assembly (3), wherein the concrete pad (4) is arranged along the arrangement direction of the plastic strip (5), and wherein part of the longitudinal steel bar (1) and the transverse steel bar (2) are arranged on the top and bottom surfaces of the box assembly (3).

2. The combined cast-in-situ hollow box core mold according to claim 1, characterized in that: The longitudinal steel bars (1) are fixedly connected to the transverse steel bars (2), and the hollow box core mold further comprises additional stirrups (6). Both ends of the additional stirrups (6) are bent and fixedly connected to the shorter of the longitudinal steel bars (1) and the transverse steel bars (2).

3. The combined cast-in-situ hollow box core mold according to claim 2, characterized in that: The longitudinal steel bars (1) are arranged in the transverse direction, and the transverse steel bars (2) are arranged in the longitudinal direction. A reinforcement space (7) is formed between the box components (3) that are not arranged in contact with each other, and part of the longitudinal steel bars (1) and the transverse steel bars (2) are arranged in the reinforcement space (7).

4. The combined cast-in-situ hollow box core mold according to claim 3, characterized in that: The hollow box core mold further comprises ribs (8), and the ribs (8) are arranged in the reinforcement space (7).

5. The combined cast-in-situ hollow box core mold according to claim 4, characterized in that: The top of the concrete pad (4) is provided with a groove (9) and a through hole (10).

6. The combined cast-in-situ hollow box core mold according to claim 5, characterized in that: A binding wire is passed through the through hole (10) of the concrete pad (4), and the shorter of the longitudinal steel bars (1) and the transverse steel bars (2) arranged on the top and bottom surfaces of the box assembly (3) is set on the groove (9) and fixedly connected to the concrete pad (4) via the binding wire.

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