CN107939047A - Anti-floating device and method for formwork shell in hollow floor slab - Google Patents

Abstract

The invention provides a formwork anti-floating device and a formwork anti-floating method in a hollow floor slab. The method comprises the steps of placing a formwork in a hollow floor formwork, installing the formwork anti-floating device in the hollow floor formwork, and then pouring. The device and the method can effectively prevent the formwork from floating upwards in the hollow floor slab pouring process to influence the construction quality, and the device has the advantages of simple structure, easy material taking and simple and convenient manufacture.

Description

Anti-floating device and method for formwork shell in hollow floor slab

technical field

The invention belongs to the technical field of concrete pouring, and in particular relates to an anti-floating device and method for formwork in hollow floor slabs.

Background technique

Reinforced concrete structures require large building materials and are heavy in weight, while for floor slabs, the middle part is generally suspended, so the strength of the floor slab is low. For this reason, the country advocates the use of cast-in-place hollow slab technology to realize the construction of the slab. In this way, not only can the consumption materials be reduced, but also the weight of the slab can be reduced. The construction method of hollow-core slabs is generally to add a mandrel into the concrete. The construction process is to build the formwork, lay the steel mesh, put the mandrel, and pour the concrete to get the hollow floor.

However, during the construction of cast-in-situ concrete hollow slabs, due to the large buoyancy generated by concrete pouring, the mandrel in the hollow slab usually floats up, resulting in the thickness of the concrete at the upper and lower parts of the mandrel after pouring does not match the design, affecting the quality of the project, and thus affecting Structural security.

Contents of the invention

The problem to be solved by the present invention is to provide an anti-floating device and method for form shells in hollow slabs, which can effectively prevent the form shells from floating up during the pouring process of hollow slabs and affect the construction quality.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a formwork anti-floating device in hollow floor slabs, including a top limiting structure, a vertical pole and a bottom fixing structure, and the top limiting structure is arranged on the top of the formwork , the upper end of the vertical pole passes through the bottom formwork and formwork of the hollow floor slab and is connected to the top limiting structure, and the lower end of the vertical pole is fixed with the bottom formwork through the bottom fixing structure.

In the technical solution, preferably, a sleeve is also included, the sleeve is sleeved on the outside of the vertical pole, the top of the sleeve is not lower than the bottom of the formwork, and the bottom of the sleeve is not higher than the height of the plate bottom template.

In the technical solution, preferably, the vertical rod is a screw, the screw is screwed to the top limiting structure, and the screw is screwed to the bottom fixing structure.

In the technical solution, preferably, the top limiting structure is a steel bar, the steel bar is welded to the first nut through the first backing plate, and the screw rod is connected to the top limiting structure through the first nut.

In the technical solution, preferably, the bottom fixing structure is a backing plate, and the screw rod is fixed to the backing plate through a second nut.

Another object of the present invention is to provide a method for anti-floating formwork in hollow floor slabs, which includes installing the above-mentioned anti-floating device for formwork in hollow floor slabs after placing the formwork in the formwork of hollow slabs, and then pouring.

In the technical solution, preferably, installing the formwork anti-floating device in the hollow floor slab includes: drilling holes in the bottom formwork, the bottom surface of the formwork and the top surface of the formwork; The hole on the top surface passes through; the top of the vertical pole is fixed to the top limit structure arranged on the top of the formwork; the bottom of the vertical pole is fixed to the plate bottom formwork through the bottom fixing structure.

In the technical solution, preferably, it also includes setting the sleeve between the formwork and the bottom template before passing the vertical rod through the hole, and then passing the vertical rod through the sleeve and passing it through the hole. Overmolded.

The advantages and positive effects that the present invention has are:

1. It can effectively limit the floating of the formwork during the pouring process of the hollow slab, and ensure the construction quality of the hollow slab;

2. The cost of materials used in the manufacture of the device is low, easy to obtain materials, simple to manufacture, easy to use, and less capital investment;

3. In this device, after the concrete construction of the hollow floor slab is completed, the screw rod, the lower backing plate and the nut can be removed and recycled to save materials;

4. This method advances the fixed formwork from one side, followed by binding the upper layer of steel bars to form a flow operation, and the construction progress and efficiency are significantly improved.

Description of drawings

Fig. 1 is a structural schematic diagram of a formwork anti-floating device in a hollow floor slab according to an embodiment of the present invention.

Fig. 2 is a schematic view of the formwork anti-floating device installed on the formwork in the hollow floor slab of the embodiment of the present invention.

In the picture:

1. Top limit structure 2. Vertical pole 3. Bottom fixed structure

4. Formwork 5. Bottom formwork 6. Pads

7. Sleeve 8. Backing plate 9. Nut

10. Backing plate 11. Nut

Detailed ways

Embodiments of the invention are further described below in conjunction with the accompanying drawings:

As shown in Fig. 1 and Fig. 2, a formwork anti-floating device in a hollow floor slab described in this embodiment includes a top limiting structure 1, a vertical pole 2 and a bottom fixing structure 3, and the top limiting structure 1 is designed On the top of the formwork 4, the upper end of the vertical pole 2 passes through the bottom template 5 of the hollow floor slab and the formwork 4 is connected to the top limit structure 1, and the lower end of the vertical pole 2 is connected to the bottom of the slab through the bottom fixing structure 3. Template 5 fixed. After adjusting the position of the formwork 4 in the hollow slab formwork, the cushion block 6 below the hollow slab formwork will lift the formwork 4 to a certain height, and then use the formwork anti-floating device to lift the formwork 4 in the vertical direction. The position is fixed. During the pouring process, the buoyancy generated by the concrete on the formwork makes the formwork tend to move upwards. However, the top position of the formwork is fixed by the top limit structure 1, which prevents the formwork from moving upward or downward during pouring. The lower displacement ensures the construction quality of the hollow floor slab; and the anti-floating device has a simple structure, convenient materials and simple manufacture.

Wherein, the vertical pole 2 can be a pole of various materials or shapes, for example, steel or iron can be used to make a cylindrical pole or a rectangular parallelepiped pole, or directly use the remaining steel bars on the construction site as a vertical pole. Rod, preferably, the vertical rod 2 uses a threaded screw rod, such as an M12 screw rod, and the screw rod is threaded to the top limiting structure 1, and is also threaded to the bottom fixing structure 3. The use of screw rods can make the anti-floating device easy to install, no need to use tools for welding, and threaded connection can be realized, and after the floor is poured, the bottom fixing structure 3 and the vertical pole 2 can be removed for recycling, which greatly saves material, which simplifies the installation process.

The top limiting structure 1 can be a horizontally placed plate-shaped structure or a column-shaped structure, can be a plate-shaped or column-shaped structure, or can be a plurality of plate-shaped or column-shaped structures with different angles arranged horizontally, as long as the formwork can be adjusted The limit of the top and the size and structure of the floor formwork can be used to realize the invention of the present invention. The top limiting structure 1 is preferably made of hard material. Preferably, the top limiting structure 1 is a steel bar arranged horizontally. The diameter and length of the reinforcing bar can be adjusted according to the size of the actual formwork 4. The reinforcing bar passes through the backing plate 8 and the nut. 9 is welded, and the screw rod is connected with the top limiting structure 1 through a nut 9. Steel bars, backing plate 8 and nut 9 can all be obtained from the remaining materials on the construction site. For example, backing plate 8 can use 40*40*4 flat iron, and nut 9 can use M12 nuts. The above parts are easy to obtain, cheap and easy to make .

The bottom fixing structure 3 can also be of various shapes and materials, as long as it can fix the position of the bottom of the vertical pole 2 in the vertical direction, the invention can be realized. Preferably, the bottom fixing structure 3 is a backing plate 10. The screw rod is fixed with the backing plate 10 through the nut 11, and the backing plate 10 is arranged between the nut 11 and the plate bottom formwork 5. On the plate bottom formwork 5, a wooden frame can be arranged between the plate bottom formwork 5 and the backing plate. By tightening The nut 11 fixes the screw rod and the backing plate 10, thereby fixing the position of the screw rod in the vertical direction. The backing plate and nuts are common simple components on the construction site. For example, the backing plate can be a 150*150*6 steel backing plate, and the nuts can be M12 nuts, which are easy to obtain and easy to manufacture.

Preferably, the device also includes a casing 7, which is sleeved on the outside of the vertical pole 2, the top of the casing 7 is not lower than the bottom of the formwork 4, and the bottom of the casing 7 is not higher than the bottom formwork 5 in height. After the casing is set, the screw rod can be separated from the area where the concrete is poured, so as to prevent the concrete from solidifying and fixing the screw rod in the floor slab after pouring the concrete, which cannot be removed. The sleeve can be made of various materials, preferably PVC.

Another object of the present invention is to provide a method for anti-floating formwork in hollow floor slabs, which includes installing the anti-floating device for formwork in hollow floor slabs after placing the formwork in the formwork of hollow floor slabs, and then pouring. The above-mentioned anti-floating device for the formwork can well prevent the formwork from being displaced in the vertical direction by buoyancy during the pouring process, which affects the construction quality.

Preferably, installing the formwork anti-floating device in the hollow floor slab includes: drilling holes in the bottom formwork 5, the bottom surface of the formwork 4 and the top surface of the formwork 4; The hole on the top surface of the formwork 4 passes through; the top of the vertical pole 2 is fixed to the top limit structure 1 arranged on the top of the formwork 4; the bottom of the vertical pole 2 is passed through the bottom fixing structure 1 and the bottom of the plate Template 5 fixed.

More preferably, before the vertical pole 2 is passed through the hole, the sleeve 7 is arranged between the formwork 4 and the bottom template 5, and then the vertical pole 2 is passed through the sleeve 7 , and pass through formwork 4. Preventing the vertical pole 2 from contacting the poured concrete facilitates subsequent dismantling of the vertical pole 2 for recycling.

The anti-floating method of the formwork in the hollow floor slab described in this embodiment specifically includes the following steps:

1. According to the size of the formwork, use 40*40*4 flat iron, M12 nuts, and make a suitable length of steel bar with a diameter of 12mm according to the actual size of the formwork to make the top limit structure 1;

2. Push the formwork 4 into a suitable position from the side of the floor formwork, and after adjusting the position, use a drill bit with a diameter of 16mm to drill a hole at the center of the formwork 4 from top to bottom, and the bottom part drills through the bottom formwork 5 ;

3. From the drilling position on the bottom formwork 5, penetrate the PVC casing upwards to the lower surface of the formwork 4, and use the M12 screw to pass through the bottom formwork 5, the PVC sleeve, the formwork 4 and connect with the formwork 4 in sequence. The upper and top limit structure 1 is tightened by bolt connection, and the bottom is connected with the bottom formwork 5 by using 150*150*6 steel backing plate and M12 nuts, so as to form a formwork anti-floating system from top to bottom;

4. Complete the concrete pouring of the hollow floor slab;

5. After the construction is completed, remove the screw rod and the lower backing plate 10 and nut 11 for turnover.

A formwork anti-floating device and method in a hollow floor slab described in this embodiment:

It can effectively limit the floating of the formwork during the pouring process of the hollow slab and ensure the construction quality of the hollow slab; the cost of materials used in the production of the device is low, easy to obtain materials, simple to make, easy to use, and less capital investment; in this device, the hollow After the concrete construction of the floor slab is completed, the screws, lower backing plates, and nuts can be removed for recycling and save materials; this method advances the fixed formwork from one side, and then follows the upper layer of steel bars to bind, forming a flow operation, and the construction progress and efficiency are significantly improved.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (8)

1. A kind of 1. formwork anti-floating system in cassette ceiling, it is characterised in that：Consolidate including upper limit structure, vertical upright bar and bottom Determine structure, the upper limit structure is arranged on the top of formwork, and the upper end of the vertical upright bar passes through the plate bed die of cassette ceiling Plate and the formwork are connected with the upper limit structure, and the lower end of the vertical upright bar passes through bottom fixing structure and the plate End template is fixed.
2. 2. formwork anti-floating system in cassette ceiling according to claim 1, it is characterised in that：Further include casing, the set Pipe sleeve is arranged on the outside of the vertical upright bar, and the top of described sleeve pipe is not less than the bottom of the formwork, and the bottom of described sleeve pipe is not Higher than the height of the plate bed die plate.
3. 3. formwork anti-floating system in cassette ceiling according to claim 1 or 2, it is characterised in that：The vertical upright bar is Screw rod, the screw rod are threadedly coupled with the upper limit structure, and the screw rod is threadedly coupled with the bottom fixing structure.
4. 4. formwork anti-floating system in cassette ceiling according to claim 3, it is characterised in that：The upper limit structure is Reinforcing bar, the reinforcing bar are limited by the first backing plate and the first nut-welding, the screw rod by first nut and the top Bit architecture connects.
5. 5. formwork anti-floating system in the cassette ceiling according to claim 3 or 4, it is characterised in that：The bottom fixed knot Structure is backing plate, and the screw rod is fixed by the second nut and the backing plate.
6. 6. a kind of method of formwork anti-floating in cassette ceiling, it is characterised in that：It is included in after placing formwork in cassette ceiling template Formwork anti-floating system in cassette ceiling as described in claim 1-5 is any is installed, is then poured into a mould.
7. 7. the method for formwork anti-floating in cassette ceiling according to claim 6, it is characterised in that：The installation is described hollow Formwork anti-floating system includes in floor：Drill in plate bed die plate, formwork bottom surface and formwork top surface；By the vertical upright bar from described The hole of plate bed die plate, the formwork bottom surface and the formwork top surface passes through；By the top of the vertical upright bar and it is arranged on described The upper limit structure at the top of formwork is fixed；The bottom of the vertical upright bar is passed through into the bottom fixing structure and the plate End template is fixed.
8. 8. the method for formwork anti-floating in cassette ceiling according to claim 7, it is characterised in that：Being additionally included in will be described perpendicular Before up-and-down rod is passed through from the hole, casing is arranged between the formwork and the plate bed die plate, then will be described vertical vertical Bar is pierced by from described sleeve pipe, and passes through the formwork.