JPH0257631B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a concrete wall scooping method, and more particularly to a concrete wall scooping method that allows concrete walls to be scooped easily.

[Technical background of the invention and its problems]

BACKGROUND ART Conventionally, concrete walls have been cut out and the cut-out portions have been used to support various structures and devices. This method of cutting concrete walls involves placing a pick on the wall surface and using the vibration of the pick to shake up the concrete. However, due to the problem of burrow disease caused by the vibration of the pick, work could only be done for two hours a day, and The work requires a considerable number of days and a specialized worker.

[Purpose of the invention]

An object of the present invention is to provide a method for scooping a concrete wall that can be easily done by anyone and is easy to do.

[Summary of the invention]

The present invention relates to a concrete wall scooping method for cutting a concrete wall surface to a predetermined size and depth in order to install a new structure, device, etc. on the concrete wall surface. 80 to 150 in a position avoiding the reinforcing steel inside.
After drilling multiple guide holes with a diameter of mmφ and a depth of 100 to 150 mm using an air drill, a pick or pickle is placed inside each guide hole and drilled from the inner peripheral surface of the guide hole. By using a pick or a pickaxe to remove cracks, it is easy to make cracks in the concrete wall, improving work efficiency and making it easy for anyone to do the work.

[Embodiments of the invention]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the concrete wall cutting method according to the present invention will be described below with reference to the accompanying drawings.

In Figure 1, 1 is an existing concrete wall, such as a concrete building or a wall inside a concrete tank at a sewage treatment plant, and a new structure or device is to be installed on the concrete wall 1. .

In this case, as shown in FIG. 2, a cutting portion 2 is drawn on the concrete wall surface 1a in advance as shown by a two-dot chain line so that the position and size of the cutting should be known. Next, make an appropriate number of guide holes 3 in this cutting part 2.
to be drilled. This guide hole 3 is the concrete wall 1
In order to avoid the reinforcing bars 4 inside, the position of the reinforcing bars 4 is checked in advance using, for example, a metal detector (not shown) before drilling. The guide hole 3 is drilled manually using an electric hammer drill 6 having an air drill 5 attached to its tip, as shown in FIG. 3, for example. The diameter of the guide hole 3 to be drilled is approximately 80 to 150 mmφ, and its depth is
Something about 100 to 150 mm is good. In this case, if the diameter of the guide hole 3 is 80 mmφ or less, it will be difficult for a pick, etc., which will be described later, to enter the guide hole 3, and if the diameter of the guide hole 3 is 80 mmφ or less,
In this case, the drilling work requires a lot of time, which is not preferable in terms of work efficiency.

After drilling an appropriate number of guide holes 3,
Apply a pick or pickle (not shown) inside the
After scooping out the concrete in guide hole 3,
A pick is applied to the inner peripheral surface of the guide hole 3 to scrape the concrete wall 1. In this case, since the pick is to be removed from the inner circumferential surface of the guide hole 3, cracks can easily enter the concrete wall 1, making the removal operation easier.

Next, when the digging work in one guide hole 3 is completed, the other guide holes 3 are dug in order, and as shown in FIG. form 2.

If an appropriate number of guide holes 3 are provided in the scooping part 2 at intervals of about 2 to 4 times the hole diameter, cracks from each guide hole 3 will propagate better and the scooping work will be easier. This makes it possible to improve work efficiency by 30 to 50%.

〔Effect of the invention〕

As is clear from the above detailed description, the present invention exhibits the following excellent effects.

(1) Since multiple guide holes are drilled in the concrete wall surface to be scraped and the concrete wall is scraped using the guide holes, the work efficiency is increased by 30% compared to the conventional method of scraping the concrete wall directly with a pick. ~
This can be improved by 50% and the number of man-hours can be significantly reduced.

(2) Since even an amateur can perform the drilling work, anyone can easily perform the drilling work.

(3) Since the vibrating pick does not directly scrape the concrete wall, and the scraping work can be done in a short time, problems such as owl disease do not occur, and the working environment is improved.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a concrete wall to be scraped in the concrete wall scraping method according to the present invention, Figure 2 is a left side view of Figure 1, and Figure 3 is a concrete wall scraping method according to the present invention. FIG. 4 is a cross-sectional view showing the state in which the concrete wall has been bored in the concrete wall digging method according to the present invention. In the diagram, 1 is a concrete wall, 2 is a cutout, and 3
is a guide hole.

Claims (1)

[Claims] 1. In a concrete wall scooping method for cutting down a concrete wall to a predetermined size and depth in order to install new structures, equipment, etc. on the concrete wall, reinforcing bars within the wall are added to the concrete wall to be cut. After drilling multiple guide holes with a diameter of 80 to 150 mm and a depth of 100 to 150 mm in a position that avoids the A distinctive concrete wall construction method.