JP6151589B2 - Concrete compaction management device and management method - Google Patents

Description

  The present invention relates to a compaction management device and a management method for concrete, embankment, a CSG dam body, etc. that have not yet solidified immediately after placement.

In concrete construction, concrete compaction work plays an important role.
However, the concrete compaction method is to some extent described in the concrete standard specifications of the Japan Society of Civil Engineers and JASS5 of the Architectural Institute of Japan as “does vibration compaction for about 10 seconds”. The actual situation is left to the intuition and experience of the person in charge and the workers.
As a result, there is a possibility that a place where aggregates are gathered or forgetting compaction may occur. In this case, compaction may be insufficient and the quality of concrete may not be ensured.
In addition, the fact that construction specifications are not quantitatively shown for the properties and structural design of concrete, and that it is difficult to confirm the lack of compaction inside the formwork are also the cause of construction failure.
In order to solve such a problem, an invention as described in Patent Document 1 is known.

JP 2013-53492 A

The apparatus described in Patent Document 1 has a structure in which information from cameras arranged around the site is processed by analysis software to determine the position in order to specify the position of the vibrator.
Therefore, in a civil engineering work or a building with a complicated shape, the field of view of the camera is not always ensured, and versatility is low.
In addition, complicated operations such as resetting the positions of surrounding cameras according to changes in the site are required.
In addition to photographing with a camera, a structure using a GPS receiver attached to a vibrator is also shown, but the site is not necessarily limited to a place where the sky is open, so the versatility is low.

In order to solve the above problems, compaction management device such as concrete of the present invention includes a vibrator to be inserted into the interior of the compaction object, a receiver for receiving a signal from the vibrator, signals from receiver The vibrator is a vibrator with a built-in transmitter inside, and the transmitter sends a signal at the start of the vibration of the vibrator and ends the vibration of the vibrator. A function that sometimes stops the transmission of signals, and the receiver obtains the transmission position of the transmitter in the vibrator and the duration of the transmission based on the distance to the transmitter and the signal received from the transmitter The display device has a function of displaying the transmission position of the transmitter in the vibrator sent from the receiver and the duration of the transmission on the screen.
In addition, the concrete compaction management method of the present invention uses the concrete compaction management device described above, and in the figure showing the placement range of concrete etc. displayed on the screen of the display device, the position and duration of the outgoing, is obtained by the display means displays by changing the like colors or symbols in accordance with the position or value.

Since the concrete compaction management device and management method of the present invention are as described above, the following effects can be obtained.
<1> As described above, the compaction of the concrete is entrusted to the rough management of the supervisor and the worker. However, according to the apparatus and method of the present invention, quantitative management can be performed.
<2> Especially when placing concrete in a large area, there is a possibility that a place where the compaction position is skipped and the compaction is forgotten may occur. However, according to the apparatus and method of the present invention, the compaction position is set. Since it can be displayed, it is possible to prevent such construction troubles from occurring.
<3> Since the compaction time at that position can be displayed as well as the compacted position, it is possible to display a position where the compaction time is insufficient and prompt additional compaction.
<4> Since it is a structure that obtains information on the compaction position and duration by sending a signal from the vibrator itself, it is highly reliable even at sites where there are obstacles around it or where the sky is not open. It is possible to know the compacted state accurately.

Explanatory drawing of the Example of the vibrator used for compaction of the concrete of this invention. Explanatory drawing of the Example which is compacting concrete with a vibrator. Explanatory drawing of the Example of the system which pinpoints the position of a transmitter. The figure which shows the relationship between a slump and the influence range of compaction.

  Hereinafter, preferred embodiments of a concrete compaction management apparatus and management method of the present invention will be described in detail with reference to the drawings.

<1> Overall Configuration The compaction management device of the present invention is a screen for processing a vibrator 1 inserted into an object to be compacted, a receiver 2 receiving a signal from the vibrator 1, and a signal from the receiver 2. And a display device for displaying on the screen.

<2> Vibrator The vibrator 1 is a commercially available device that applies vibration to concrete or the like to improve fluidity.
However, the vibrator 1 of the present invention uses the vibrator 1 with the transmitter 12 built in the head 11 to link the operation of the vibrator 1 and the start of the signal from the transmitter 12.
For this purpose, for example, a structure is adopted in which a power line from the vibrator 1 to the vibration motor at the tip is branched and connected to the transmitter 12 to supply power.
By adopting such a structure, ON / OFF of vibrator 1 and ON / OFF of transmitter 12 can be linked.

<3> Transmitter As described above, the transmitter 12 is housed inside the vibrator 1, for example, the head 11.
The transmitter 12 is a device that transmits a signal when the vibration of the vibrator 1 starts and stops transmitting the signal when the vibration of the vibrator 1 ends.
As will be described later, even if only the location of the transmitter 12 is known, it is unknown whether the vibrator 1 is vibrating.
However, it is clear that the transmitter 12 of the present invention is in operation because it transmits a signal only when the vibrator 1 is activated.
Further, since the transmission of the signal from the transmitter 12 is stopped when the vibration of the vibrator 1 is finished, the duration of the vibration applied to the object such as concrete by the vibrator 1 is also clear.

<4> Receiver In the field, as shown in FIG. 2, concrete 4 is placed in the mold 3, and the vibrator 1 is inserted therein.
Then, as shown in FIG. 3, the signal transmitted simultaneously with the vibration is received by the receiver 2 from the transmitter 12 in the vibrator 1.
In order to obtain the position of the vibrator 1 and the duration of vibration using this signal, a MUSIC (multiple signal classification) algorithm, which is a technique for estimating the direction of arrival, is used.

<5> Identification of vibrator position This algorithm is an estimation technique mainly using a phase difference.
For this purpose, the receiver 2 uses a plurality of antennas arranged in an array called an array antenna 21 as shown in FIG. 3, and measures the phase and amplitude for each antenna.
Then, an estimation result called a spectrum is obtained for each arrival angle, and a peak in the arrival direction is obtained therefrom.
By searching for the peak, the direction of arrival of the transmitter 12 in the vibrator 1 can be estimated.
The distance between the transmitter 12 and the receiver 2 is directly measured with a measure or the like without using an estimation technique.
Thus, if the direction and distance are known, the position of the transmission source can be easily specified.

<6> Display The position information specified by the above system is displayed in real time on a personal computer display.
On the display screen, a placement range such as concrete is input and displayed in advance, and the result of the signal from the vibrator 1 is displayed at a corresponding position.
Although the position and compaction time are displayed on the screen of the display device, it is easier to see if they are displayed by changing their colors or using symbols.
By looking at this display screen, it is possible to immediately know where the compaction has been forgotten and where the compaction time is insufficient, so that compaction can be instructed promptly.
However, this display cannot display the depth direction of the wall.
However, the management method of the present invention targets a thin wall having a thickness of about 20 cm to 40 cm.
Therefore, only by knowing the position, the influence range of the compaction can be sufficiently grasped.

<7> Relationship between Compaction and Slump The relationship between the slump of concrete and the influence range of compaction is known from past studies of the applicant of the present case, for example, as shown in FIG.
Therefore, it is possible to adopt a system that changes the influence range of compaction by slump.

1: Vibrator 11: Head 12: Transmitter 2: Receiver 21: Array antenna

Claims (2)

Constitute a vibrator to be inserted into the interior of the compaction object, a receiver for receiving a signal from the vibrator, the display device and to be displayed on a screen by processing the signals from the receiver,
The vibrator is a vibrator with a transmitter inside.
The transmitter has a function of transmitting a signal at the start of the vibration of the vibrator and stopping the transmission of the signal at the end of the vibration of the vibrator.
Based on the distance to the transmitter and the signal received from the transmitter, the receiver has a function for obtaining the transmission position of the transmitter in the vibrator and the duration of the transmission ,
The display device has a function of displaying the transmission position of the transmitter in the vibrator sent from the receiver and the duration of the transmission on the screen,
Concrete compaction management device. Using the device of claim 1,
In the figure showing the placement range of concrete etc. displayed on the screen of the display device ,
Outgoing position of the transmitter and outgoing duration was characterized by displaying changing and color and symbols according to their position and value,
Concrete compaction management method.

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