JP7443179B2 - Vertical slit material construction inspection method, vertical slit material, vertical slit structure, and vertical slit material construction method - Google Patents

Description

The present invention relates to a method for inspecting the construction of a vertical slit material, and particularly to a method of inspecting the construction of a vertical slit material using an RFID (Radio Frequency Identification) tag, and the vertical slit material.

In concrete structures such as reinforced concrete and steel-framed reinforced concrete, various seismic slit materials are used between structural columns or structural beams and non-structural walls in order to form mechanical discontinuities against interlayer displacement when earthquakes occur. is interposed between. For example, a vertical slit material is installed near the boundary between a non-structural wall such as a waist wall, a hanging wall, a wing wall, and a column connected thereto. To bury the vertical slit material in a concrete structure, place the vertical slit material between formworks erected facing each other in order to construct the vicinity of the connection between the wall and columns/beams, and bury the vertical slit material in the formwork. The concrete is fixed, then concrete is poured between the forms, and after the concrete has cured for a predetermined period of time, the forms are removed.

In concrete structures in which seismic slit material is embedded, large-scale repairs after construction may result in forgetting to insert the seismic slit material, or bending of seismic slit material, especially vertical slit material, due to lateral pressure during concrete placement. Examples of such defects have been discovered, and some of them have become social problems. If such a problem occurs, not only is there a risk that the function as an earthquake-resistant slit may not be exhibited, but there is also a risk that water leakage may occur due to deviation from the original installation position (designed position).

Therefore, in recent years, in order to prevent construction defects of seismic slit materials as described above, we have thoroughly confirmed the installation status of seismic slit materials during formwork assembly and concrete pouring, and dismantled formwork. Countermeasures have been taken, such as strengthening visual inspections and photographic recording of misalignment of later seismic slit materials, especially vertical slit materials that are subject to lateral pressure during concrete pouring.
However, the above-mentioned measures are based on human eyes and hands, and include problems such as the occurrence of human error and the need for a huge amount of human effort to organize the test results.

On the other hand, as an inspection technology related to construction materials, Patent Document 1 describes a technique for attaching RFID tags to construction materials for the purpose of detecting whether construction materials such as fillers and fireproof materials have been installed without forgetting. A technique has been disclosed for inspecting whether or not the construction material is installed on a structure by reading ID information stored in the RFID tag using a reading means. In addition, Patent Document 2 describes an IC tag that is attached to a building material, assuming that the building material is mainly reused, such as formwork, and for the purpose of determining the number of years of service life and history. a reader/writer for writing and reading data, and a building material management data record in which management data of at least one of performance data, history data, and arrangement data of the building material is written to and read from the IC tag. system is disclosed.

Japanese Patent Application Publication No. 2020-026649 Japanese Patent Application Publication No. 2014-169543

The technology of Patent Document 1 mentioned above targets auxiliary materials, especially fillers and fireproof materials, which are members that do not directly affect the structural strength of structures among building materials. The building materials to be used, specifically the formwork, are seismic slit materials buried in the above-mentioned structures, especially vertical slit materials that are concerned about problems such as bending due to lateral pressure during concrete pouring. However, it was not possible to easily and reliably confirm construction defects such as misalignment due to the above-mentioned curvature, which is a problem specific to vertical slit materials.

Therefore, the present invention specializes in the construction inspection of vertical slit materials, and specifically provides a construction inspection method for vertical slit materials that can easily and reliably confirm construction defects such as misalignment due to curvature of the vertical slit materials. An object of the present invention is to provide a construction method for a slit structure and a vertical slit material.

In order to solve the above-mentioned problems, the present invention provides a construction inspection method for a vertical slit material, a vertical slit material, etc. described in the following [1] to [11].
[1] A construction inspection method for a vertical slit material interposed between a non-structural wall and a structural column of a concrete structure,
The above vertical slit material is equipped with an RFID tag,
The RFID tag is installed at a height within 50% from the bottom end of the vertical slit material,
The construction status of the vertical slit material is confirmed by reading the ID information stored in the RFID tag from the side surface of the vertical slit material using an RFID reader that reads the ID information stored in the RFID tag. do,
Construction inspection method for vertical slit materials.
[2] After covering a part of the non-structural wall side adjacent to the designed position of the RFID tag with a shielding material, the ID information stored in the RFID tag is read by the RFID reader from the side surface of the vertical slit material. The method for inspecting the construction of a vertical slit material according to item [1] above, which comprises confirming the presence or absence of a positional shift in the vertical slit material.
[3] The vertical slit material is made up of a plate-shaped slit core material and a strength aggregate that covers at least one side surface of the slit core material, and the RFID tag is attached to the side surface of the slit core material and the strength bone material. The method for inspecting the construction of a vertical slit material according to item [1] or [2] above, characterized in that the vertical slit is provided between the material and the material.
[4] The method for inspecting the construction of a vertical slit material according to [3] above, wherein the RFID tag is attached to a side surface of the slit core material.
[5] The vertical slit material according to any one of [1] to [4] above, further comprising an RFID tag provided at a height within 50% from the upper end of the vertical slit material. construction inspection method.
[6] The method for inspecting the construction of a vertical slit material according to any one of [1] to [5] above, wherein the RFID tag is of a passive type.
[7] The method for inspecting the construction of a vertical slit material according to any one of [1] to [6] above, wherein the RFID tag is waterproofed.
[8] A vertical slit material, characterized in that the RFID tag used in the method for inspecting the construction of a vertical slit material according to any one of [1] to [7] above is provided at a height within 50% from the bottom end. .
[9] A vertical slit material interposed between a non-structural wall and a structural column of a concrete structure,
The above vertical slit material is equipped with an RFID tag,
The RFID tag is provided on the side surface of the vertical slit material at a height within 50% from the bottom end thereof.
Vertical slit material.
[10] A vertical slit structure in which a vertical slit material is interposed between a nonstructural wall and a structural column of a concrete structure,
The above vertical slit material is equipped with an RFID tag,
The RFID tag is provided on the side surface of the vertical slit material at a height within 50% from the bottom end thereof.
Vertical slit structure.
[11] A method for constructing a vertical slit material for forming a vertical slit structure in which the vertical slit material is interposed between a nonstructural wall and a structural column of a concrete structure, the method comprising:
The above vertical slit material is equipped with an RFID tag,
The RFID tag is arranged between opposing formworks so as to be located on the side surface at a height within 50% from the bottom end of the vertical slit material.
Construction method of vertical slit material.

According to the present invention described above, the RFID tag is provided at a height within 50% from the bottom end of the vertical slit material, and the ID information stored in the RFID tag is read from the side surface of the vertical slit material by the RFID reader. Since it can be read or read, construction defects such as misalignment due to curvature of the vertical slit material can be easily and reliably confirmed.

1 is a diagram schematically showing a construction inspection method for a vertical slit material according to the present invention. It is a perspective view showing one embodiment of a vertical slit material. FIG. 3 is a perspective view showing a state in which the vertical slit material is attached to the formwork. It is a perspective view after pouring concrete into a formwork and dismantling the formwork. It is a figure showing the outline of the construction inspection method of the vertical slit material using a shielding material. FIG. 2 is a conceptual front view showing a test specimen of a reinforced concrete structure used in an experiment.

EMBODIMENT OF THE INVENTION Hereinafter, the construction inspection method of the vertical slit material, the vertical slit material, etc. which concern on this invention are demonstrated in detail, referring drawings.

FIG. 1 is a diagram schematically showing the construction inspection method for vertical slit material according to the present invention.
The construction inspection method of the present invention uses an RFID tag 10 attached to the vertical slit material 1 and an RFID reader 20.

As shown in FIG. 2, for example, the vertical slit material 1 includes a plate-shaped slit core material 2 and a strength aggregate 3 that covers the side surface of the slit core material 2.
The material constituting the slit core material 2 is not particularly limited, but may be made of foam, fiber, metal plate, plastic plate, etc. Examples of foams include plate-shaped inorganic foams such as calcium carbonate foams, and plate-shaped resin foams such as foamed polystyrene, foamed urethane, foamed polyethylene, foamed polycarbonate, foamed polyvinyl chloride, and foamed phenol. Examples of the fiber include rock wool and glass wool. Examples of the plastic plate include molded plates made from magnetic tape and the like. Among these, it is preferably made of foam or fibers such as glass wool, and more preferably made of foam, because it is lightweight and has excellent workability, rust prevention, and the like.

The size of the slit core material is not particularly limited, but is, for example, about 1000 to 2500 mm in the longitudinal direction (height direction during construction), 100 to 300 mm in the transverse direction, and 20 to 50 mm in thickness. Alternatively, it may be constructed by joining two or more slit core materials together. Furthermore, in the illustrated embodiment, the left and right pair of force aggregates 3, 3 are formed to have substantially the same shape, and each force aggregate 3 has a groove 3a having a substantially U-shaped cross section formed at its inner end, where the above-described groove 3a is formed. The side ends of the slit core material 2 are fitted into each other, and a fixing member fitting groove 3b having a substantially trapezoidal cross section is formed at the outer end. The strength aggregate 3 is manufactured, for example, by extrusion molding of synthetic resin such as hard vinyl or polypropylene, but is not limited thereto. Further, in the illustrated embodiment, the strength aggregates 3 are provided on both sides of the slit core material 2, but it is sufficient that they are provided on at least one side surface, or they may be formed as a continuous member on both sides of the slit core material 2. Although it is preferable to cover substantially the entire surface, it may be constructed by joining two or more members together.

As the RFID tag 10, a wide variety of known RFID tags can be used.
Typically, an RFID tag includes an IC chip and an antenna. The IC chip is equipped with a microcomputer, EEPROM, RAM, etc., and functions as a recording medium for storing ID information. The antenna is made of a metal material wound into a loop shape, and transmits ID information written on the IC chip to the outside through the antenna. The antenna can also receive various information from the outside, and the RFID tag can also write ID information based on the received information.

The communication frequency bands of RFID tags are LF band (below 135 kHz), HF band (near 13.56 MHz), UHF band (near 900 MHz), and microwave band (near 2.45 GHz), and each has its own communication characteristics and The influence of communication, communication methods, etc. are different. Among these, RFID tags that communicate in the UHF band, specifically in the frequency band of 880 to 920 MHz, are preferably used. An RFID tag that communicates in the UHF frequency band can be read when the distance between the RFID tag and the RFID reader is from several cm to about 1 meter, making inspection easier at the construction site.

Furthermore, there are two types of RFID tags: passive type (type that operates by obtaining power from radio waves from the reader) and active type (type that operates by obtaining power from built-in battery). A passive type is preferably used because it is inexpensive and can be used for a long period of time. In addition, RFID tags come in various shapes such as label, card, coin, and stick shapes, but a label type that can be pasted is preferred from the viewpoint of ease of attachment to vertical slit material and stability of reading. .

The RFID tag 10 used in the present invention is preferably waterproofed from the viewpoint of more reliably protecting the tag from moisture during concrete placement. Examples of waterproofing include packaging with a waterproof bag, coating with a waterproof sheet, film, or tape, and rubber coating by chemical reaction treatment. According to this configuration, since the RFID tag is waterproofed, it is possible to prevent it from breaking down due to moisture during concrete pouring.

The ID information stored in the RFID tag 10 is information for specifying the vertical slit material 1 to which the RFID tag is attached, and includes, for example, the type, size, shape, weight, material, identification number, performance, etc. of the vertical slit material. Examples include manufacturing company, price, etc., and one or more of these pieces of information are stored in the RFID tag as ID information. In addition, by combining the above ID information with structural slit information as design data of a building designed using BIM, it is possible to check the consistency of the design data and the information on the actually constructed structural slits, and to perform repairs, etc. You can check information on the constructed structural slits.

In the present invention, the RFID tag 10 is attached at a height within 50% from the lower end of the vertical slit material 1. Thereby, construction defects such as misalignment of the lower part due to concrete side pressure when the vertical slit material 1 is buried in a structure can be easily and reliably confirmed from the position of the RFID tag. From this point of view, the mounting position of the RFID tag 10 is more preferably within 30% of the lower end of the vertical slit material 1, particularly preferably within 20% of the lower end; Most preferably, the height is within 10% of the height.
Note that within 50% from the lower end of the vertical slit material 1 refers to the ratio of the height from the lower end of the slit material to the maximum height of the entire vertical slit material.
Specifically, the RFID tag 10 is preferably attached at a height within 500 mm from the bottom end of the vertical slit material 1, more preferably within 300 mm from the bottom end, and within 200 mm from the bottom end. It is further preferable that the device be installed at a height of .

Moreover, it is preferable that the RFID tag 10 be attached at a height position within 50% from the upper end of the vertical slit material 1. This is because the vertical slit material 1 is not only susceptible to misalignment of the lower part due to concrete side pressure when buried in the structure mentioned above, but also due to improper installation of the vertical slit material to the formwork, and to improve the filling performance of concrete. Misalignment may occur due to various reasons such as contact with a vibrator, and even if such misalignment occurs, the position of the RFID tag 10 attached above and below the vertical slit material will be This is preferable because the positional deviation can be detected with high accuracy. In this case, the mounting position of the RFID tag 10 is more preferably within 30% of the height from the top of the vertical slit material 1, and particularly preferably within 20% of the height from the top of the vertical slit material 1. Most preferably, the height is within 10% of the top.
Note that within 50% from the upper end of the vertical slit material 1 refers to the ratio of the height from the upper end of the slit material to the maximum height of the entire vertical slit material.

Specifically, the method for attaching the RFID tag 10 to the vertical slit material 1 is as follows: 1. 2. Directly attaching (using tape or adhesive) to the side surface of the slit core material; 2. 3. How to attach it to the back side of the strength aggregate; 4. A method of physically holding the slit core material by fitting the slit core material to the force aggregate; 4. 5. A method of placing a fireproof material such as rock wool between the slit core material and the aggregate and embedding it therein; 5. 6. A method of making cuts or the like in the slit core material and embedding it. There is a method of pasting the slit core material on the plate surface, but in the present invention, the ID information stored in the RFID tag 10 can be easily read from the side by the RFID reader 20 after construction, and In order to reliably prevent the RFID tag from coming into direct contact with concrete, the RFID tag 10 is attached to the side of the vertical slit material 1 between the side surface of the slit core material and the strength aggregate. Becoming something 1. ~4. The method described in 1. is preferable, and furthermore, from the viewpoint of being able to cope with misalignment of the slit core material in the case where the slit core material has separated from the strength aggregate. Particularly preferred is a method in which it is directly attached to the side surface of the slit core material.

The timing of attaching the RFID tag 10 to the vertical slit material 1 is not particularly limited, and may be attached before the vertical slit material is delivered to the construction site, or may be attached at the construction site. Further, the ID information may be written to the RFID tag 10 at any timing; for example, the ID information may be written by a supplier or the like before the vertical slit material is delivered to the construction site; may be written by a contractor who installs the vertical slit material after it has been delivered to the construction site. Note that writing and reading of ID information is usually performed by one device, and it is preferable that writing is also performed by the RFID reader 20. That is, the RFID reader 20 may also be used as an RFID writer.

The RFID reader 20 reads ID information stored in the RFID tag 10 by receiving radio waves emitted by the RFID tag 10.
An RFID reader is usually provided with an information processing unit composed of a CPU, MPU, and the like. The information processing unit specifies the vertical slit material to which the RFID tag is attached based on the read ID information. This allows the RFID reader to detect that a predetermined vertical slit material is installed on the structure. The RFID reader notifies the user of the detected information by, for example, emitting light from a lamp of the RFID reader, emitting a warning sound, or displaying the information on a display device provided in the RFID reader. Note that the configuration of the RFID reader is not limited to the above configuration; for example, the RFID reader is not provided with an information processing unit, and uses wired or wireless communication to process external processing such as a smartphone, a mobile terminal such as a tablet terminal, or a computer system. It is also possible to transmit read ID information to the device.

The vertical slit material 1 to which the RFID tag 10 is attached is vertically spanned and buried between a non-structural wall and a structural column of a concrete structure.
When burying the vertical slit material 1 in a structure, the exception is that after burying, the RFID tag is placed between opposing formworks so that it is located on the side of the vertical slit material at a height within 50% from the bottom end. In this case, a conventional known method may be used. For example, when constructing the formwork 50 that forms the column part X and the wall part Y shown in FIG. The fixing member fitting grooves 3b of the strength aggregate 3 provided on one side of the vertical slit material 1 are engaged, and the vertical slit material 1 is made to stand between the column part X and the wall part Y. Next, a fixing member 54 is fixed to the inner wall surface of the inner formwork 53 with nails or the like, and while the inner formwork 53 is erected, a force provided on the other side of the vertical slit material 1 in which the fixing member 54 is erected is applied. It is fitted into the fixing member fitting groove 3b of the aggregate 3. As a result, both sides of the vertical slit material 1 are held and fixed by the fixing members 51 and 54 fixed to the formwork 50. If concrete is placed between the formwork 50 in this state and the formwork 50 is removed after the concrete has cured for a predetermined period of time, as shown in FIG. A vertical slit structure 60 in which the slit material 1 is embedded is constructed. Note that when removing the formwork 50, the fixing members 51 and 54 are pulled out from the fitting groove 3b of the strength aggregate 3, forming a recess 60a. It is then filled with caulking material to prevent water leakage, etc. Thereafter, interior materials, exterior materials, etc. are installed and finished on the inner and outer surfaces of the constructed structural columns 61 and non-structural walls 62.

Here, after embedding the vertical slit material 1, the RFID tag 10 is placed between the opposing formworks 51 and 53 so that it is located on the side surface at a height within 50% from the bottom end of the vertical slit material. A vertical slit structure 60 in which a vertical slit material 1 is interposed between a non-structural wall 62 and a structural column 61 of a concrete structure, and the RFID tag 10 is located at a height within 50% from the bottom end of the vertical slit material 1. A vertical slit structure 60 provided on the side surface is formed.

The method for inspecting the construction of vertical slit material 1 according to the present invention is to check the construction status of vertical slit material 1 by reading ID information stored in RFID tag 10 from the side surface of vertical slit material 1 using RFID reader 20. It is something.
When reading RFID tags using an RFID reader, it has the following characteristics: it can read multiple tags at once by simply holding the reader over the tags, it can read even from a certain distance, it can read tags that cannot be seen with the naked eye, and it can read even if the surface is dirty. There is. Therefore, the RFID reader 20 may be brought close to the location where the vertical slit material 1 is installed so that the RFID reader 20 can receive radio waves from the antenna of the RFID tag 10. As a result, the ID information stored in the RFID tag 10 is read by the RFID reader 20, and the construction status of the vertical slit material 1 can be determined, for example, whether the vertical slit material 1 is being constructed, and in which position the vertical slit material is being constructed. This makes it possible to easily, reliably, and even safely check whether the position of the image is correct (whether there is any positional deviation), etc. Note that the RFID reader 20 may be carried by the user inside the structure, but it is also possible to install the RFID reader 20 on an unmanned moving object such as a drone and move it inside and outside the structure to construct the vertical slit material 1. You can check the situation.

Inspections based on reading by the RFID reader 20 are performed after the vertical slit material 1 is attached to the formwork 50, after concrete is poured, after construction is completed, during periodic inspections after construction, and when repairs are made to the structure. .
In particular, by performing this after the vertical slit material 1 is attached to the formwork 50 and before concrete is poured, it is possible to check if the vertical slit material 1 has been forgotten to be inserted at an early stage before concrete is poured. This makes it easy to deal with forgetting to put in the material 1. In addition, by performing this after the concrete is poured and before the concrete hardens, it is possible to check for misalignment of the lower part of the vertical slit material 1 due to lateral pressure during concrete pouring before the concrete hardens. It becomes possible to redo the construction of material 1 easily.

In the vertical slit material construction inspection method according to the present invention, from the viewpoint of detecting positional deviation defects of the vertical slit material 1 due to lateral pressure during concrete placement, the RFID tag 10 (that is, the vertical slit material to which the RFID tag 10 is attached) is used. 1) The position needs to be detected. Here, the position information of the RFID tag 10 can be obtained, for example, by analyzing the radio wave intensity generated from the RFID tag 10 that is received by the RFID reader 20. In this case, the position information of the RFID tag 10 relative to the RFID reader 20 Detected as relative position information. In the present invention, in order to easily confirm the positional deviation of the vertical slit material 1 due to the lateral pressure during concrete placement from the relative position information of the RFID tag 10 with respect to the RFID reader 20, the lateral pressure during concrete placement is The lower part of the vertical slit material 1 where the positional shift is noticeable due to The RFID tag 10 is attached at a height within 20% of the lower end, most preferably at a height of 10% from the lower end.
Note that "within 50% from the lower end of the vertical slit material 1" refers to the ratio of the height from the lower end of the slit material to the maximum height of the entire vertical slit material arranged.
Specifically, the RFID tag 10 is preferably attached at a height within 500 mm from the lower end of the arranged vertical slit material 1, and more preferably at a height within 300 mm from the lower end. It is more preferable that the height position be within 200 mm from

In addition, in the present invention, from the viewpoint of more reliably detecting misalignment of the vertical slit material 1 due to lateral pressure during concrete placement, as conceptually shown in FIG. It is preferable that the ID information stored in the RFID tag 10 be read by the RFID reader 20 from the side surface of the vertical slit material 1 after covering a part of the non-structural wall side with the shielding material 70. At this time, the designed position of the RFID tag is not covered with a shielding material. In this case, by attaching the RFID tag 10 to the lower part of the vertical slit material 1 where misalignment due to lateral pressure during concrete placement is noticeable, if misalignment occurs, see Figure 5. As illustrated, the attached RFID tag 10 is hidden by the shield material 70 and is not detected by the RFID reader 20, so that it can be clearly confirmed.
Note that the above-mentioned design position of the RFID tag means the position of the RFID tag that is assumed to exist based on the design of the vertical slit material.

The above-mentioned shielding material is not particularly limited as long as it shields radio waves, but steel plates made of iron, aluminum, stainless steel, etc., and resin plates laminated with aluminum film, etc. are used because they are easy to handle at construction sites. Preferred examples include tape and tape.
It is sufficient that the shielding material covers a part of the non-structural wall side adjacent to the designed position of the RFID tag, and the shielding material is on the non-structural wall side adjacent to the designed position of the RFID tag and is substantially the same as the RFID tag. Preferably, the height portion is covered. In addition, from the viewpoint of detecting positional deviation more reliably, it is preferable that the part on the adjacent non-structural wall side within at least 20 mm in the horizontal direction from the designed position of the RFID tag is covered, and the adjacent non-structural wall within 10 mm is covered. More preferably, the side portions are coated. Further, a part of the structural column adjacent to the designed position of the RFID tag may be covered.
The shape and size of the shield material are not particularly limited, but from the viewpoint of workability, it is preferably rectangular with a length of 200 to 1250 mm and a width of 30 to 500 mm, more preferably a rectangle of 300 to 1000 mm in length and 50 to 300 mm in width. preferred.

Although the embodiments of the vertical slit material construction inspection method and vertical slit material according to the present invention have been described above, the present invention is not limited to the embodiments described above, and is described in the claims. It goes without saying that various modifications and changes can be made within the scope of the technical idea of the present invention.

The experiment was conducted using a quasi-full-scale test specimen that reproduced the reinforced concrete structure consisting of columns, beams, and walls shown in Figure 6. Before assembling the formwork, an RFID tag was placed on the side of each seismic slit material (vertical slit material, horizontal slit material) (1 for the vertical slit material, 2 short tags for the horizontal slit material because the wall is divided by columns) One long book.The RFID tags were attached at both ends of one vertical slit, at both ends of two short horizontal slits, and at both ends and the center of one long horizontal slit, for a total of nine locations. Each seismic slit material with an RFID tag attached was set in a formwork using a known normal formwork assembly procedure. As the slit core material, a foam made of vinyl chloride foam in which a large amount of calcium carbonate was dispersed was used.
The RFID tag used in this verification experiment was a passive type, UHF band general-purpose tag (manufactured by Toppan Forms: 0890 Waterproof Label). The shape of the RFID tag is a label type (105 mm long x 25 mm wide x 0.25 mm thick). In addition, to prevent moisture in the concrete during pouring, we used a waterproof label type (which can be easily attached to seismic slit material). In the vertical slit material, the RFID tags were attached to the lower end and the upper end of the side surfaces of the vertical slit material, respectively. Although not shown, the RFID tag was attached directly to the side surface of each slit core material, and was further covered with a strength aggregate.
An identification number identifying the seismic slit material was written in advance as ID information on the RFID tag, and this ID information was read with an RFID reader (ATID880, manufactured by ATID).

Inspection during formwork assembly: RFID tags during formwork assembly (before concrete pouring) were read with an RFID reader.
As a result of reading the RFID tag from a position approximately 3 meters away from the structure with the radio wave output of the RFID reader set to maximum, it was confirmed that all nine locations could be read simultaneously. In other words, it was found that by reading the RFID tag before pouring concrete, it was possible to confirm the quantity of seismic slit material set in the formwork, and to detect if the seismic slit material had been forgotten.

Inspection after concrete placement: RFID tags after concrete placement (before concrete hardening) were read with an RFID reader.
Reading was performed by fixing the distance from the RFID tag to the RFID reader at approximately 50 cm, and setting the radio wave output of the RFID reader as small as possible within the readable range. This is to specify the position of the read RFID tag by reading only a specific RFID tag, and it was confirmed that only the RFID tag at this target location can be read (determined based on ID information).
Furthermore, we took advantage of the fact that RFID tags become unreadable when shielded with a steel plate, etc., to verify the detection of bending defects in vertical slit materials. As shown in Figure 5 above, the part of the non-structural wall adjacent to the designed position, which is not the original design position of the RFID tag, is covered with a shielding material (a steel plate measuring 1000 mm long x 200 mm wide), and the RFID tag is We confirmed that the presence or absence of curvature can be detected by reading the tag. In other words, an RFID tag whose vertical slit material is not curved and is in its original position can be read, and an RFID tag whose vertical slit material is curved and has shifted from its original position is hidden by the shielding material and cannot be read. there were. Therefore, it was confirmed that by combining the RFID tag and the shielding material, the presence or absence of curvature in the vertical slit material can be detected more reliably.

The present invention described above can easily and reliably confirm construction defects caused by misalignment due to curvature of vertical slit materials, etc. This method can be widely used as a construction inspection method for slit materials.

1 Vertical slit material 2 Slit core material 3 Strength aggregate 3a Groove 3b Fixing member fitting groove 10 RFID tag 20 RFID reader 50 Formwork 51 Outer formwork 52 Fixing member 53 Inner formwork 54 Fixing member 60 Vertical slit structure 61 Structure Column 62 Nonstructural wall 70 Shield material

Claims (11)

A construction inspection method for a vertical slit material interposed between a non-structural wall and a structural column of a concrete structure, wherein the vertical slit material is provided with an RFID tag, and the RFID tag is within 50% of the lower end of the vertical slit material. An RFID reader installed at a height of A construction inspection method for vertical slit materials, which is characterized by checking the construction status of vertical slit materials. After covering a part of the non-structural wall side adjacent to the designed position of the RFID tag with a shielding material, the ID information stored in the RFID tag is read by the RFID reader from the side surface of the vertical slit material. 2. The vertical slit material construction inspection method according to claim 1, further comprising the step of confirming the presence or absence of positional deviation of the slit material. The vertical slit material includes a plate-shaped slit core material and a power aggregate that covers at least one side surface of the slit core material, and the RFID tag is configured to connect the side surface of the slit core material and the power aggregate. 3. The method for inspecting the construction of a vertical slit material according to claim 1 or 2, wherein the vertical slit material is provided between the vertical slits. 4. The method for inspecting the construction of a vertical slit material according to claim 3, wherein the RFID tag is attached to a side surface of the slit core material. 5. The method for inspecting the construction of a vertical slit material according to claim 1, further comprising an RFID tag provided at a height within 50% of the upper end of the vertical slit material. 6. The method for inspecting the construction of vertical slit materials according to claim 1, wherein the RFID tag is of a passive type. 7. The method for inspecting the construction of a vertical slit material according to claim 1, wherein the RFID tag is waterproofed. A vertical slit material, characterized in that the RFID tag used in the method for inspecting the construction of a vertical slit material according to any one of claims 1 to 7 is provided at a height within 50% from the lower end. A vertical slit material interposed between a non-structural wall and a structural column of a concrete structure, wherein the vertical slit material is provided with an RFID tag, and the RFID tag is located at a height within 50% from the lower end of the vertical slit material. A vertical slit material characterized by being provided on the side of the. A vertical slit structure in which a vertical slit material is interposed between a non-structural wall and a structural column of a concrete structure, wherein the vertical slit material is provided with an RFID tag, and the RFID tag is located 50% from the bottom end of the vertical slit material. A vertical slit structure, characterized in that the vertical slit structure is provided on the side surface at a height within A method for constructing a vertical slit material for forming a vertical slit structure in which a vertical slit material is interposed between a non-structural wall and a structural column of a concrete structure, the vertical slit material being equipped with an RFID tag, A method for constructing a vertical slit material, the method comprising placing the vertical slit material between opposing formworks so that the RFID tag is located on the side surface at a height within 50% from the bottom end of the vertical slit material.

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