Anti-floating device for foam core mold of hollow slab beam

Abstract

The utility model belongs to the technical field of bridge construction, and relates to an anti-floating device for a hollow slab beam foam core mold, which is characterized by comprising a top pressure lever, an upper limiting structure and a left-right limiting structure, an upper limiting structure extending into the pouring formwork is arranged in the middle of the top pressing lever, and a left-right limiting structure is arranged in the pouring formwork. According to the utility model, the foam core mold is bidirectionally positioned in the up-down direction and the left-right direction, so that the effect of preventing the foam core mold from moving is good, the construction is convenient, the construction efficiency is improved, and the quality of a hollow slab beam is effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and relates to an anti-floating device, in particular to an anti-floating device for a foam core mold of a hollow slab beam. Background Technique

[0002] The prefabrication of hollow slab beams, as an energy-saving, environment-friendly and efficient road and bridge construction technology, is currently widely used in small-span bridge structure projects. Among them, the foam core mold technology in hollow slab beams is the key point to ensure its light structure, reduce the overall self-weight of the bridge and reduce foundation settlement.

[0003] The foam core mold is embedded in the steel bar framework before the concrete of the beam slab is poured. It is easy to cause the foam core mold to float or move left and right due to the pouring of concrete, thus causing problems such as insufficient thickness of the top slab or web or even exposed steel bars in the structure, affecting the stress and durability of the hollow slab beam after forming in the later stage.

[0004] In order to avoid the floating of the foam core mold, the existing method is usually to install longitudinal pressure bars on the top of the foam core mold. This kind of limiting method cannot limit the left and right directions of the foam core mold. Therefore, during pouring, special attention needs to be paid, that is, when the concrete is fed, it is necessary to ensure uniform symmetry, and when vibrating, it is also necessary to be uniform and symmetric, and try to avoid over-vibrating and oblique insertion. The construction is relatively inconvenient, which greatly affects the pouring efficiency of the hollow slab beam. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-floating device for a foam core mold of a hollow slab beam with a scientific and reasonable structural design, stable limiting, convenient construction, improved pouring efficiency and easy implementation.

[0006] The utility model solves its technical problems through the following technical solutions:

[0007] An anti-floating device for a foam core mold of a hollow slab beam, characterized in that: it includes a top pressure bar, an upper limiting structure and a left and right limiting structure. The top pressure bar is connected at intervals through the cooperation of connecting screws and nuts at the upper end of the pouring formwork. An upper limiting structure extending into the pouring formwork is arranged in the middle of the top pressure bar, and a left and right limiting structure is arranged inside the pouring formwork;

[0008] The left and right limiting structure includes U-shaped reinforcing bars and guide steel pipes. Two relatively installed guide steel pipes are evenly distributed at intervals at the lower end of the top pressure bar. The two guide steel pipes are adapted to the width of the foam core mold. U-shaped reinforcing bars are evenly distributed at intervals in the length direction of the bottom of the foam core mold, and the vertical steel bars of the U-shaped reinforcing bars are inserted into the guide steel pipes.

[0009] Moreover, it further includes a reinforcement structure, and the reinforcement structure includes U-shaped reinforcing bars. The U-shaped reinforcing bars are arranged at intervals along the length direction of the foam core mold, and the bottom of the U-shaped reinforcing bars is connected to the bottom web steel bar framework located at the bottom of the casting formwork.

[0010] Moreover, the casting formwork includes a bottom formwork and side formworks. Vertical side formworks are arranged around the bottom formwork, and connecting eaves that are horizontally folded outward are provided at the upper ends of the side formworks. Both ends of the top pressing bar are connected to the connecting eaves through the cooperation of connecting screws and nuts.

[0011] Moreover, the upper limit structure includes an adjusting screw. A perforation is provided in the middle of the top pressing bar, and an adjusting nut fixed on the top pressing bar is provided at the lower end of the perforation. The adjusting screw passes through the perforation and is threadedly installed on the adjusting nut.

[0012] Moreover, the U-shaped reinforcing bar includes a horizontal steel bar and vertical steel bars vertically welded to both ends of the horizontal steel bar. The foam core mold is placed between the two vertical steel bars, and the upper parts of the two vertical steel bars are inserted into the guiding steel pipes.

[0013] Moreover, the U-shaped reinforcing bar is a structure integrally formed by bending steel bars, and includes a first horizontal section, a first vertical section and a hook section. First vertical sections are vertically bent downward at both ends of the first horizontal section, and a hook section is bent inward at the bottom of the two first vertical sections, and the hook section is hooked on the bottom web steel bar framework.

[0014] The advantages and beneficial effects of the present utility model are as follows:

[0015] The anti-floating device for the foam core mold of the present hollow slab beam avoids the problems of unqualified structures caused by the floating of the foam core mold, rework, and the scrapping of the slab beam. And this device can be reused, avoiding unnecessary waste, and greatly improving the product quality and economic benefits.

[0016] Furthermore, the present utility model performs two-way positioning on the foam core mold in the up-down and left-right directions, so that during pouring, the effect of preventing the foam core mold from moving is good, which is convenient for construction, improves the construction efficiency, and effectively guarantees the quality of the hollow slab beam. Description of the Drawings

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a structural schematic diagram of the U-shaped reinforcing bar of the present utility model;

[0019] Figure 3 is a structural schematic diagram of the U-shaped reinforcing bar of the present utility model.

[0020] Reference Signs

[0021] 1 - Top pressure bar, 2 - Guide steel pipe, 3 - Portal reinforcement bar, 4 - Adjusting screw, 5 - Adjusting nut, 6 - Foam core mold, 7 - Connecting screw, 8 - Connecting eaves, 9 - Side formwork, 10 - Spacer block, 11 - U-shaped reinforcement bar, 12 - Bottom and web steel bar skeleton, 13 - Bottom formwork, 14 - Vertical steel bar, 15 - Horizontal steel bar, 16 - First horizontal section, 17 - First vertical section, 18 - Hook section. Specific implementation mode

[0022] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not restrictive, and the protection scope of the present invention cannot be limited thereby.

[0023] A floating prevention device for the foam core mold of a hollow slab beam. The present invention is used during the forming and pouring of a hollow slab beam. The pouring formwork for forming the hollow slab beam includes a bottom formwork 13 and side formworks 9. Vertical side formworks are provided around the bottom formwork. A bottom and web steel bar skeleton 12 is laid on the bottom formwork through spacer blocks 10, and the bottom and web steel bar skeleton is formed by binding bottom steel bars arranged horizontally and vertically.

[0024] The innovation of the present invention lies in: including a top pressure bar 1, an upper limit structure and a left and right limit structure. The top pressure bar is connected at intervals through the cooperation of connecting screws 7 and nuts at the upper end of the pouring formwork. The pouring formwork includes a bottom formwork and side formworks. Vertical side formworks are provided around the bottom formwork. At the upper end of each side formwork, there is a connecting eaves 8 that turns horizontally outward. Both ends of the top pressure bar are connected to the connecting eaves through the cooperation of connecting screws and nuts.

[0025] An upper limit structure extending into the pouring formwork is provided in the middle of the top pressure bar:

[0026] The upper limit structure includes an adjusting screw 4. A perforation is provided in the middle of the top pressure bar, and an adjusting nut 5 fixed on the top pressure bar is provided at the lower end of the perforation. The adjusting screw passes through the perforation and is threadedly installed on the adjusting nut. The floating amount of the foam core mold 6 is adjusted by the length of the adjusting screw extending out of the adjusting nut.

[0027] A left and right limit structure is provided inside the pouring formwork:

[0028] The left and right limit structure includes a U-shaped reinforcement bar 11 and a guide steel pipe 2. Two oppositely installed guide steel pipes are evenly distributed at intervals at the lower end of the top pressure bar. The two guide steel pipes are adapted to the width of the foam core mold. U-shaped reinforcement bars are evenly distributed at intervals in the length direction of the bottom of the foam core mold, and the vertical steel bars of the U-shaped reinforcement bars are inserted into the guide steel pipes.

[0029] The U-shaped reinforcement bar mentioned above includes a horizontal steel bar 15 and vertical steel bars 14 vertically welded at both ends of the horizontal steel bar. The foam core mold is placed between the two vertical steel bars, and the upper parts of the two vertical steel bars are inserted into the guiding steel pipes.

[0030] In order to further limit and reinforce the foam core mold, the utility model also provides a reinforcement structure. The reinforcement structure includes a portal-shaped reinforcement bar 3. The portal-shaped reinforcement bars are arranged at intervals along the length direction of the foam core mold, and the bottom of the portal-shaped reinforcement bar is connected to the bottom web steel bar framework located at the bottom of the casting formwork; the portal-shaped reinforcement bar is a structure integrally formed by bending steel bars, and includes a first horizontal section 16, a first vertical section 17 and a hook section 18. At both ends of the first horizontal section, it is vertically bent downward to form a first vertical section, and at the bottom of the two first vertical sections, it is bent inward to form a hook section, and the hook section is hooked on the bottom web steel bar framework.

[0031] The utility model can ensure that the polystyrene foam core mold does not move left and right during the process of pouring concrete, and finally, a downward pressure is applied to it through the adjusting screw rod extending downward in the middle, so as to control the floating of the foam core mold.

[0032] Working process:

[0033] 1. Placement of the non-removable polystyrene foam core mold

[0034] During the construction of the hollow slab beam, first place the U-shaped reinforcement bars in the well-bound bottom web steel bar framework, and then place the non-removable polystyrene foam core mold. The U-shaped reinforcement bars are arranged at intervals of 2 meters in the length direction of the polystyrene foam core mold and are inserted into the guiding steel pipes on the top pressing bar.

[0035] 2. Reinforcement of the non-removable polystyrene foam core mold

[0036] Use the portal-shaped reinforcement bar to carry out the first reinforcement work: set up the top plate steel bar framework on the top of the polystyrene foam core mold. After the top plate steel bar framework is well-bound, bind the portal-shaped reinforcement bar for preventing the core mold from floating to the top plate steel bar framework to provide a higher anti-floating measure for the polystyrene foam core mold. The portal-shaped reinforcement bars are arranged at intervals of 30 cm in the length direction of the polystyrene foam core mold. After covering the polystyrene foam core mold, hook the bottom web steel bar framework and bind it firmly.

[0037] 3. Installation of the utility model

[0038] Before pouring concrete, use this device to apply a downward pressure to the core mold to prevent the foam core mold from floating. The adjusting screw rods are arranged at intervals of 2 m in the length direction of the polystyrene foam core mold. It is simple to disassemble, easy to operate, and can be reused.

[0039] The utility model has been used on the first-piece hollow slab beam in the precast beam yard of the hollow slab beam in the Dongxing Project Department, and the anti-floating effect is good.

[0040] Although embodiments and drawings of the utility model are disclosed for illustrative purposes, those skilled in the art can understand that various substitutions, changes, and modifications are possible without departing from the spirit and scope of the utility model and the appended claims. Therefore, the scope of the utility model is not limited to the content disclosed in the embodiments and drawings.

Claims

1. A device for preventing the floating of a hollow slab beam foam core mold, characterized in that: It includes a top pressing bar, an upper limit structure and left and right limit structures. The top pressing bar is connected at intervals by the cooperation of connecting screws and nuts at the upper end of the casting formwork. An upper limit structure extending into the casting formwork is provided in the middle of the top pressing bar, and left and right limit structures are provided inside the casting formwork; The left and right limit structures include U-shaped reinforcing bars and guiding steel pipes. Two oppositely installed guiding steel pipes are evenly distributed at intervals at the lower end of the top pressing bar. The two guiding steel pipes are adapted to the width of the foam core mold. U-shaped reinforcing bars are evenly distributed at intervals in the length direction of the bottom of the foam core mold. The vertical reinforcing bars of the U-shaped reinforcing bars are inserted into the guiding steel pipes.

2. The anti-floating device for the foam core mold of the hollow slab beam according to claim 1, characterized in that: It also includes a reinforcement structure. The reinforcement structure includes portal-shaped reinforcing bars. Portal-shaped reinforcing bars are arranged at intervals along the length direction on the foam core mold. The bottom of the portal-shaped reinforcing bars is connected to the bottom web steel bar skeleton located at the bottom of the casting formwork.

3. The anti-floating device for the hollow slab beam foam core mold according to claim 1, characterized in that: The casting formwork includes a bottom formwork and side formworks. Vertical side formworks are provided around the bottom formwork. Connecting eaves that are horizontally folded outwards are provided at the upper ends of the side formworks. Both ends of the top pressing bar are connected to the connecting eaves by the cooperation of connecting screws and nuts.

4. The anti-floating device for the hollow slab beam foam core mold according to claim 1, characterized in that: The upper limit structure includes an adjusting screw. A perforation is provided in the middle of the top pressing bar. An adjusting nut fixed on the top pressing bar is provided at the lower end of the perforation. The adjusting screw passes through the perforation and is threadedly installed on the adjusting nut.

5. The anti-floating device for the foam core mold of the hollow slab beam according to claim 1, characterized in that: The U-shaped reinforcing bar includes a transverse reinforcing bar and vertical reinforcing bars vertically welded to both ends of the transverse reinforcing bar. The foam core mold is placed between the two vertical reinforcing bars. The upper parts of the two vertical reinforcing bars are inserted into the guiding steel pipes.

6. The anti-floating device for the hollow slab beam foam core mold according to claim 2, characterized in that: The portal-shaped reinforcing bar is a structure formed by bending a steel bar integrally, including a first horizontal section, a first vertical section and a hook section. First vertical sections are vertically bent downwards at both ends of the first horizontal section. Hook sections are bent inwards at the bottoms of the two first vertical sections. The hook sections are hooked on the bottom web steel bar skeleton.

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