KR20020047433A - Opening form and opening construction established to the slab and the filling method using the same - Google Patents

Abstract

PURPOSE: Provided are a cast for forming temporary opening-part and a method for mounting the opening-part and for re-filling the same by using the same without alternative introduction of concrete for forming bottom panel and to solve a structural problem such as Shear punching. CONSTITUTION: The process comprises a number of steps of mounting bottom panel cast(40) of a building simultaneously with another cast for forming opening-part; introducing bottom concrete into both of the cast(40) and the cast for opening-part then curing the same; detaching the cast for opening-part charged with the bottom concrete from the bottom panel(60) to form the opening part(70); forming a conical opening-part concrete(80) after extracting opening part from the cast; and inserting the conical opening-part concrete(80) into the pre-formed opening part(70).

Description

Opening form and opening construction established to the slab and the filling method using the same}

The present invention relates to an opening formwork and an opening and backfilling method using the same. More specifically, when installing the slab formwork of the building, the overall shape is conical and the opening formwork with the handle is installed together, and then the bottom plate concrete is poured and cured, and the opening formwork is placed and cured inside the formwork. The present invention relates to a method of forming a conical opening on a bottom plate by separating the (conical shape) and the opening formwork together, and using the above-mentioned conical opening concrete when refilling the opening.

Temporary small openings are installed to reach the upper floors for temporary cables, etc., required when constructing the floor plates of each floor of the building, and small openings are installed for high-rise buildings for reference point verification.

Conventionally, in order to install a temporary small opening to be installed in the bottom plate, a temporary opening mold using plywood or a box is installed together with the bottom plate formwork, and then the opening is installed by curing the bottom plate concrete around the opening mold. . After the opening is used according to the above purpose, the backfill is again used.In this case, after the backfill formwork is installed, the concrete for filling the opening is poured and the backfilling form is dismantled, or the method of backfilling the opening is used.

Once the bottom plate formwork is installed, the bottom plate is completed by pouring the bottom plate concrete to cure, and the required opening is formed by drilling the bottom plate using a perforator at the position where the opening is to be installed. After using the opening in accordance with the above purpose, the backfill must be again, and at this time, after the backfill formwork is installed, the concrete for pouring the opening is filled, and the method for filling the opening by dismantling the backfill formwork is used.

The conventional methods all use a method of pouring a separate backfill concrete to fill the openings installed in the bottom plate. Therefore, the process of filling the openings is cumbersome and expensive, as well as shear punching on the inner surface of the backfilled openings since the openings are formed through the bottom plate vertically to form the openings and then backfilled with concrete. The same structural weakness may occur, and when the preformed bottom plate is drilled to install the opening, various reinforcing bars in the bottom plate are damaged.

Therefore, the present inventor simplifies the work process by filling the openings without using additional concrete to fill the openings, and additionally does not incur additional costs for filling the openings, and it is structural such as shear punching. Opening formwork and opening installation and backfill method using the same to overcome the disadvantages have been developed.

The purpose of the present invention is to use the opening formwork with a handle to install a temporary small opening formed in the floor plate of the building, so the bottom plate construction because there is no need to overlap the separate floor plate concrete to fill the opening The process can be simplified and it is economical because a large number of openings does not require additional floor concrete, and because the cross section of the opening is not formed vertically but is formed as a deformation cross section or inclined surface, structural problems such as shear punching are eliminated. It can be solved, it is possible to recycle the opening formwork because it uses plywood or iron plate as the opening formwork, and it is possible to change the size of the opening formwork by dismantling the opening formwork within a certain limit and remanufacturing.

1A and 1B are separate perspective and combined perspective views of the opening formwork of the present invention.

2a is a partial detail of a slab in which an opening formwork of the present invention is installed in a slab formwork.

Figure 2b is a partial detail of the bottom plate integrated by placing the bottom plate concrete in the opening formwork installed in the bottom plate formwork.

FIG. 2C is a partial detail view of the bottom plate in which the opening is formed by separating the opening formwork filled with the bottom plate concrete from the bottom plate.

2d is a perspective view of the opening formwork filled with the bottom plate concrete and the opening concrete formed by deserting the opening formwork.

FIG. 2E is a partial detail view of the bottom plate in which the opening concrete is inserted into the bottom plate in which the opening is already formed.

<Description of Major Codes in Drawings>

10: mold of the opening die 20: handle of the opening die

30: Opening formwork 40: Bottom plate formwork

50: opening formwork filled with floor concrete

60: bottom plate 70: opening

80: opening concrete

The present invention will be explained with reference to the drawings.

1 is an exploded perspective view and a combined perspective view of the opening formwork 30 of the present invention, the opening formwork 30 is composed of a mold 10 and a handle 20.

The mold 10 is manufactured by forming a plywood or iron plate in a fan shape to connect the two sides to each other to form a conical shape.

The handle 20 is made of reinforcement or plastic, and is attached to the mold 10 so as to protrude above the mold 10. In FIG. 1A, two handles are shown in an inverse 'c' shape, but the opening 70 is shown. Depending on the size of 1) may be formed one or a plurality of triangles or circles.

After the bottom plate concrete is poured and cured in the opening formwork 30, when the opening formwork 30 is separated upward as shown in FIG. 2C, the bottom plate concrete formed therein is also separated, thereby opening the bottom plate 60. ) Is formed.

2 shows the steps of a method for forming an opening in the bottom plate 70 using the opening formwork 30,

Installing the bottom formwork 40 of the building and at the same time installing the opening formwork 30; Curing after pouring the bottom concrete on the bottom plate formwork 40 and the opening formwork 30; Separating the opening formwork (50) filled with the bottom concrete from the bottom plate (60) to form an opening (70); Deserting the opening formwork (30) from the opening formwork (50) filled with the bottom concrete to form a conical opening concrete (80); And inserting the conical opening concrete 80 into the pre-formed opening 70 and finishing it.

Referring to Figures 2a to 2e as follows.

FIG. 2A is a partial detail view of the bottom plate in which the opening formwork 30 of the present invention is installed in the bottom plate formwork 40 to form a floor plate of a building. The position of the opening formwork 30 is selected as the position where the opening 70 is required, and only one opening formwork 30 is shown in FIG. 2A, but a plurality of the opening formworks 30 may be installed as necessary.

FIG. 2B is a partial detail view of the bottom plate in which the bottom plate formwork 40 and the opening formwork 30 are installed, and then the bottom plate concrete is poured and the opening formwork 30 and the bottom plate concrete are integrated and cured. When the bottom plate concrete is poured into the opening formwork 30, and then the opening formwork 30 is separated upward using a manpower or a small lifter, the conical opening concrete 80 hardened inside the opening formwork 30 together. Since the bottom plate 60, the opening 70 is formed as shown in Figure 2c.

FIG. 2C is a partial detailed view of the bottom plate in which the opening formwork 50 filled with the bottom plate concrete is separated from the bottom plate 60 and the opening 70 having the same shape as the opening concrete 80 is installed. The opening 70 serves as a passage through which various temporary wires of the building pass and serves as a reference point check passage for inspecting the verticality of the building. Therefore, when the use of the opening 70 is achieved, the bottom plate 60 is finished by filling the opening again.

FIG. 2D is a perspective view of the opening formwork 50 filled with the bottom plate concrete from the bottom plate 60 and a perspective view of the conical opening concrete 80 formed by the opening formwork 30 being deserted. Since the opening concrete 80 has the same shape as the opening 70 formed in the bottom plate 60, the opening is filled back by being inserted into the opening 70.

2E shows the state in which the opening 70 is filled by reinserting the opening formwork 30 from the opening formwork 50 filled with the bottom plate concrete and inserting the conical opening concrete 80 into the preformed opening 70. Bottom plate partial detail view. Therefore, by using the conical opening concrete 80, it is not necessary to pour the bottom plate concrete separately to backfill the opening 70, and the deserted opening formwork 30 needs to install another opening 70. It is possible to make exclusive use and to manufacture the opening formwork of small size as needed. After the opening concrete 80 is inserted into the bottom plate 60, cement paste or the like may be added to the contact surface of the bottom plate 60 and the opening concrete 80 to increase adhesion and prevent leakage.

According to the present invention, since a separate bottom plate concrete is not required for backfilling after the opening is formed in the bottom plate, it is possible to simplify the bottom plate construction work, reduce the cost, and interfere with other work by the opening backfilling work. There is no disconnection of the work process because it can be avoided, and since the opening formwork uses plywood or iron plate, it is possible to convert the installation to other openings, thereby enabling economical installation of the openings.

Claims (3)

A mold 10 having a conical shape by connecting both sides of a fan-shaped plate; And A plurality of handles 20 attached to the inner surface of the mold 10; Opening formwork comprising a. 2. The formwork of claim 1, wherein the plurality of handles (20) are any one of an inverted 'cu' or a semicircular or inverted triangle. Installing the bottom formwork 40 of the building and installing the opening formwork 30 of claim 1; Curing after pouring the bottom concrete on the bottom plate formwork 40 and the opening formwork 30; Separating the opening formwork (50) filled with the bottom concrete from the bottom plate (60) to form an opening (70); Forming a conical opening concrete (80) by deserting the opening formwork (30) from the opening formwork (50) filled with the bottom concrete; Inserting the conical opening concrete 80 into the preformed opening 70 and then closing the opening 70 to backfill the opening 70; Opening 70 installation and backfill method using the opening formwork of claim 1, characterized in that it comprises a.