JPS58218555A - Casting joint method of concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete splicing method used in the construction of concrete structures.

Normally, in concrete work such as RO or 8RO structures, joints occur on horizontal or vertical surfaces.
Like cracks, joints often become defects in the design and structure of buildings. In particular, water leakage accidents are likely to occur in vertical joints of underground external walls, and the construction is complicated and requires a great deal of labor.

BACKGROUND ART Conventionally, various methods have been devised to vertically join the outer walls of structures, including loose board joints and lath joints.

Figure 1 shows the conventional method of splicing separate boards, and the construction process using this method is: ■ Attaching the splicing frame, ■ Placing concrete, ■ Dismantling the splicing formwork, ■ The joint area The order will be cleaning, ■ reinforcing bar restoration and minor repairs, and ■ formwork restoration and minor repairs.

In the figure, a is a loose plate as a formwork for the joint surface, b is a weir plate for forming the RO wall surface, C is a form tie, d is a habata pipe, e is a square tightening chain for tightening the habata pipe, It is. In addition, a vinyl chloride water stop plate f (bending type) is attached in advance to the joining part using mounting hardware g, and is designed to be raised after the formwork is dismantled.

However, although this method can achieve relatively good results compared to conventional construction methods in terms of construction accuracy and material cost, it requires a considerable amount of effort in the series of operations mentioned above and has poor workability. In the end, there will be potential costs.

In addition, the lath joint method, which uses lath for the joint surface, has good workability, but it has advantages and disadvantages, such as water leakage due to gas rust, and is inferior in construction accuracy and cost, and neither method is necessarily satisfactory.

Therefore, it is an object of the present invention to provide a concrete splicing method that has excellent workability and economical efficiency while ensuring sufficient water-stopping properties particularly at the spliced joints.

Hereinafter, the construction method of the present invention will be explained based on illustrated embodiments.

FIGS. 2 and 3 show a joint section in this concrete joint method, in which air hoses 1 are lined up at the joint surface, and air is press-fitted into them to be used as a formwork. The embodiment shown in the figure has two air hoses 1a with a large diameter in the center.
A total of 4 pieces are attached: a main and two small-diameter air hoses 1b on both sides, but it is sufficient to prepare the required number of pipes with the necessary diameter according to the spacing of the reinforcing bars 2, etc. . Also, a water stop plate 3 is inserted between the central air hoses 1a and Ia. If air is forced in in this state, the reinforcing bars 2, the water stop plate 3, etc. can be inserted to close the entire or almost the entire joint surface.

FIG. 4 shows a specific example of the air hose 1, in which the upper and lower ends of the hose are attached to end fittings 9 with hose bands 1. Further, a valve 10 is attached to the upper end metal fitting 9, through which air is pressurized.

Although the illustrated embodiment shows an example of application to a vertical wall, it can also be used for slab jointing by arranging the air hoses horizontally.

Concrete pressure during concrete placement is also counteracted by holding down the air hose 1 with a receiving separator 8 (5). In this case, the receiving separator 8 may be tensioned with form ties if necessary.

Next, the construction procedure will be explained.

First, the air hose 1 is attached and air is pressurized into the air hose 1. In the figure, 5 is a flap pipe, 6 is a separator, and 7 is a form tie 4. When the concrete is poured and reaches a predetermined strength, the valve 10 of the air hose 1 is opened to remove air. After disassembling the air hose 1, clean and tidy up the spliced part. Finally, the formwork is restored and reworked to complete the -th piecing work.

Note that at this time, the reinforcing bars 2 can be worked on as they are, so there is no need to repair the reinforcing bars 2.

The present invention has the above configuration and has the following advantages and features.

(Re) By using an air hose filled with air as a formwork for the joint surface, leakage of concrete is eliminated.
The joint surface becomes clean. Furthermore, since the water stop plate is easy to install and can be placed in a predetermined position, a high water stop property can be obtained in addition to a clean joint surface.

(2) Installation and disassembly of the air hose is easy and the work is simplified, so it has excellent workability.

(3) Since it can be constructed without disturbing the reinforcing bars, there is no need to modify the reinforcing bars, which not only improves workability and does not waste materials, but also reduces costs.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a conventional example, Fig. 2 is a front view of a joint in the construction method of the present invention, Fig. 3 is a cross-sectional view thereof, and Fig. 4 is a cross-sectional view of a conventional example.
The figure is a longitudinal sectional view of the air hose. 1.1a, 1'b--Air hose, 2...Reinforcing bar, 3.
・Water stop plate, 4.・Weir plate, 5.・Butter pipe, 6.・Separator, 7.・Form tie, 8φ・Receptacle separator, 9.・End metal fittings, 10.−Valve, 11.・Hose band .

Claims (2)

[Claims] (1) Attach one or more air hoses as formwork substitutes to the entire or almost the entire concrete joint surface position, close the joint surface by pressurizing air into these air hoses, and then A concrete joint method characterized by removing the air hose by removing the air from the air hose, and then jointing the concrete in the adjacent area. (2) The air hose is made of rubber. Claim 1
Concrete pouring method described in section.