KR19980015826A - Construction of reinforced concrete beams - Google Patents

Abstract

The present invention relates to a reinforced concrete structure for reinforcing a reinforced concrete beam of a building structure, in which reinforced concrete beams of a building structure are previously laid in the joint portion, A step of installing a flexible tube (2) between the reinforcing reinforcing bars (1) at a portion of the joint (A) to be cut off, and a step of attaching the flexible tube (2) Air is injected into the flexible tube 2 to inflate the flexible tube 2 so as to eliminate a gap between the reinforcing bars 1 and to close the injection port 3 so that the air blocking plate 4 (5a) is placed in a line section (5) partitioned by the air shutoff plate (4) and paved with concrete, and a pouring step The flexible tube 2 is removed by discharging the air filled in the flexible tube 2 by opening the injection port 3 after the concrete 5a of the airtight container 5 is cured to remove the airtight plate 4 And removing the air blocking plate to remove the air blocking plate and installing the rear section concrete 6a so as to connect the concrete section of the line section 5 with the concrete section 6a.

Description

Construction of reinforced concrete beams

FIG. 1 shows a construction step of the present invention,

(a) is a cross-sectional view showing a state in which a flexible tube without air is provided in a joint portion

(b) is a plan view of (a)

(c) is a cross-sectional view showing that the airtight plate is formed by injecting air into the flexible tube

(d) and (b)

(e) is a cross-sectional view showing that concrete is laid in the line section

(f) and (e)

(g) is a cross-sectional view showing removal of the air shielding plate in the joint portion

(h) is a cross-sectional view showing that concrete is laid in a later section

FIG. 2 is a cross-sectional view showing completion of the reinforced concrete beam of the present invention

Description of the Related Art [0002]

A: joint 1: reinforcing steel reinforcement 2: flexible tube

3: Inlet port 4: Air shutoff plate 5: Line section

5a: Line section concrete 6: After section 6a: After section concrete

7:

[Industrial Applications]

The present invention relates to a reinforced concrete structure for reinforcing a reinforced concrete beam of a building structure, in which reinforced concrete beams of a building structure are previously laid in the joint portion, The present invention relates to a method of constructing a concrete beam.

Generally, it is ideal to avoid the striking because it is the structural part which receives the heavy load of the reinforced concrete.

However, when the installation space is wide, it is impossible to complete the pouring work in one day, and the amount of unhardened concrete to be supplied in one day is limited.

Therefore, when the concrete is to be connected, a joint form is installed at the part of the construction joint which is a partitioned boundary part of the line piling section and the rear piling section, and the concrete is laid at the time interval between the line section and the rear section respectively .

However, since the reinforced concrete reinforcement inside the formwork is complicated in the case of conducting the concrete, it is not easy to install the formwork to block the following joint parts.

Because slabs have few rebar bars, they can be easily cut off with slabs, but it is difficult to block slabs because they have a large number of complicated rebar bars.

Therefore, when the reinforcement concrete beams are to be inevitably struck, it is required to first divide the line section and the rear section, and to block the following joint portions so that the uncured concrete placed in the line section does not leak to the rear section.

[Prior Art and Problems]

In the conventional method of constructing the reinforced concrete beams, the joint sections of the inserted line section and the later-laid-back section are cut by interposing elongated panel pieces between the reinforcement bars, and thereafter, the unhardened concrete is laid in the line section, The concrete pieces are removed and the non-cured concrete is laid in the later section to complete the connection.

Since the conventional method of constructing the conventional reinforced concrete beam to be completed in this way is to insert the panel pieces between the reinforcing bars of the reinforcing bars, a gap has to be formed.

Therefore, there is a problem that unhardened concrete leaks out between the gaps.

[Object of the invention]

An object of the present invention is to provide a method of constructing a reinforced concrete beam connecting structure that effectively blocks an unhardened concrete from leaking into a joint which becomes a boundary between a line section to be laid first and a later- .

SUMMARY OF THE INVENTION [

Hereinafter, the technical structure of the present invention will be described in detail.

A method of constructing a reinforced concrete beam of the present invention comprises: First, as shown in Figs. 1 (a) and 1 (b), the flexible tubes 2 are installed vertically between the reinforcing bars 1 in the portion of the joint A where the bars are cut off A step of installing a flexible tube in which the air inlet 3 is exposed to the outside of the mold 7 on the upper part of the flexible tube 2 and a step of installing a flexible tube as shown in the diagrams (c) and Air is injected into the inside of the flexible tube 2 to inflate the flexible tube 2 so as to eliminate a gap between the reinforcing bars 1 and to close the injection port 3, As shown in Figs. 1 (e) and 1 (f) of the first drawing, the air blocking plate 4 is divided into the air blocking plate 4, , And a fourth step (g) of FIG. 1 (a), in which a concrete line 5a is laid in a line section 5, After the concrete 5a of the line section 5 is cured, the inlet 3 is opened to discharge the air filled in the flexible tube 2 to remove the reduced-volume flexible tube 2, The concrete block 6a is laid in the rear section 6 to remove the air blocking plate for removing the blocking plate 4 and the fifth step And a post-interval concrete (6a) to be connected to the concrete (5a).

The flexible tube 2 exemplifies the vertical installation of several tubes with an air inlet 3 at the top, as shown in FIGS. 1 (a) and 1 (b).

Therefore, air is injected through each air inlet 3 until the tube expands to a certain size. The flexible tube 2 is made of a rubber material, and the bicycle tire tube can be cut and used for a predetermined length.

That is, the flexible tube 2 is fixed by the fixed iron wire 8 to the partial reinforcing bar 1 of the joint A which cuts off the flexible tubes 2, and is installed vertically up and down to inject air into the flexible tube through the inlet 3 So that one air shutoff plate 4 is formed.

Therefore, the unhardened concrete placed in the line section 5 is prevented from leaking to the rear section 6 by being blocked by the air blocking plate 4 formed by the expansion of the air.

On the other hand, even if the air cushioning plate 4 according to the present invention blocks the unhardened concrete in the line section, a slight cement flake leaks into the section 6 and the gravel is exposed on the surface of the joint A so that it can be uneven.

This is because it acts as a key rather than a smooth surface of the joint A, so that the adhesion strength with the posterior section concrete 6a is increased. If the surface of the joint (A) is made smooth, it is necessary to perform the breaking work to increase the adhesion force.

[Effects of the Invention]

The present invention, which is constructed through such steps, is characterized in that a flexible tube 2 is provided in a portion of a joint A to be broken and air is introduced into the flexible tube 2 to form an air shield plate 4, (6).

Therefore, the unhardened concrete placed in the line section 5 can be prevented from leaking to the rear section 6. [

As described above, according to the present invention, the method for constructing the reinforced concrete beam is provided in the joint portion where the flexible tube is cut, thereby effectively blocking the unhardened concrete placed in the line section. Thus, It is very useful that the structural strength of the joint portion between the concrete pushed into the concrete is firmly maintained.

Claims (1)

A step of installing a flexible tube for installing a flexible tube 2 between the reinforcing bars 1 in the part of the joint A to be broken and the step of injecting air into the inside of the flexible tube 2, Forming an air shutoff plate 4 by expanding the joint between the reinforcing bar reinforcement 1 and the joint reinforcing bars 1 and removing the gap between the reinforcing bar reinforcement 1 and the injection port 3 to form an air shutoff plate 4 at the joint A, The method of claim 1, further comprising the step of placing the line section concrete that is laid on the line section (5) partitioned by the air shutoff plate (4) and pouring the concrete (5a) (6) for removing the airtight plate (4) by removing the flexible tube (2) having a reduced volume by opening the flexible tube (3) to discharge the air filled in the flexible tube (2) The concrete section 6a is laid on the concrete section of the line section 5, After the method after stroke construction of reinforced concrete beams are cast-in-place construction through the steps in the concrete section (6a).