JP6931569B2 - Removal method - Google Patents

Description

The present invention relates to a method for removing an object.

When removing asbestos-containing materials adhering to beams and columns when dismantling an existing building, in order to prevent dust from scattering, the work area is cured with a curing material such as a sheet so that it is isolated from the outside, and then the removal work is performed. I do.

In the outer peripheral part of the building, there is often only a slight gap between the beam or the like on the outer peripheral part and the exterior material on the outside thereof. Therefore, when removing asbestos-containing materials on the outside such as beams in the gap in such a case, a curing material is installed outside the building, and the exterior material is removed to secure a work space before removal. It is common to do the work.

On the other hand, in Patent Document 1, an acidic liquid injection jig is inserted into a narrow space between the beam and the curtain wall, and the asbestos-containing material is dissolved by the acidic liquid injected from the injection needle of the acidic liquid injection jig. It is described that the asbestos-containing material is peeled off from the beam.

Japanese Unexamined Patent Publication No. 2012-12890

However, when removing the asbestos-containing material in the slight gap as described above, the conventional method of removing the exterior material to secure a work space provides a large-scale curing that also serves as a scaffolding on the outside of the building. In addition to being necessary, the construction period is lengthened because the asbestos-containing material must be removed after the exterior material has been removed.

Further, in the method of Patent Document 1, the asbestos-containing material can be removed without removing the exterior material, but a special jig is required, and it is difficult to insert the jig into a narrow space for operation.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a removing method capable of easily removing an object in a slight gap of a structure.

The present invention for solving the above-mentioned problems is a removing method for removing an object in a gap between the member and the exterior material of the structure, which is provided so as to be in contact with a member of the structure. , the member, and boring to continuously a plurality of holes from the inner side of said member, forming a through hole disconnects the portion surrounded by the hole, the through hole from the inside of said member The removal method is characterized by comprising a step of removing the object through the process.

In the present invention, a through hole is formed in the member from the opposite side of the object to be removed such as an asbestos-containing material, and the object can be removed from the opposite side through the through hole. Therefore, even when there is only a slight gap on the object side of the member and a sufficient working space cannot be secured, the object can be easily removed in a short time, and a special jig does not need to be used.

The object includes, for example, asbestos.
The fact that the object can be easily removed as described above is particularly effective when removing the asbestos-containing material, which conventionally requires time-consuming work.

Further , according to the present invention, even when there is an object in a slight gap between a member such as a steel beam located on the outer peripheral portion of the structure and the exterior material on the outside thereof, the object is not removed without removing the exterior material. Objects can be removed and the construction period is shortened.
When removing the object, the object is crushed with a tool inserted through the through hole, and the object is taken out from the through hole, or a hand or a tool is passed through the through hole, and the object is hand or a tool. It is desirable to scrape and remove.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a removing method capable of easily removing an object in a slight gap of a structure.

The figure which shows the structure which performs the removal of asbestos-containing material 9. The figure explaining the method of removing the asbestos-containing material 9. The figure which shows the formation of the through hole 19. An example in which asbestos-containing materials 27 and 37 are provided on the steel frame column 21 and the floor portion 31.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(1. Structure for removing asbestos-containing material 9)
FIG. 1 is a diagram showing an outline of an outer peripheral portion of a structure for removing asbestos-containing material 9 by the removal method according to the embodiment of the present invention. This structure has a steel beam 1, a floor portion 3, an exterior finishing material 5 such as a curtain wall, a glass material 7, a column (not shown), and the like. The structure is, for example, a building such as a building, but the structure is not limited to this.

The steel beam 1 is a member located on the outer peripheral portion of the structure. In this embodiment, an H-section steel composed of a flange 13 and a web 15 is used as the steel beam 1.

The floor portion 3 is provided on the steel frame beam 1 and is composed of a concrete slab or a deck plate.

The exterior finishing material 5 and the glass material 7 are exterior materials of the structure, and are provided apart from the outside of the steel frame beam 1. Here, the outside means the side of the structure facing the outside, and corresponds to the left side of FIG. Further, the inside is the opposite side (indoor side), and corresponds to the right side in FIG.

An asbestos-containing material 9 is arranged as a refractory material around the steel frame beam 1. The asbestos-containing material 9 is an object to be removed by the removal method according to the present embodiment, and contains asbestos.

In FIG. 1, only the asbestos-containing material 9 outside the steel frame beam 1 is shown, and the other asbestos-containing materials around the steel frame beam 1 have already been removed. The illustrated asbestos-containing material 9 is provided so as to be in contact with the steel frame beam 1, and is arranged in a slight gap between the steel frame beam 1 and the exterior finishing material 5 on the outside thereof.

In the example of FIG. 1, a molded plate 9a and a coma material 9b are used as the asbestos-containing material 9, and the coma material 9b is in contact with the outer surface of the web 15 of the steel frame beam 1. The molded plate 9a is in contact with the upper and lower flanges 13 on the outside of the coma material 9b.

In the present embodiment, when removing the asbestos-containing material 9, a work section is set inside the structure, and the work section is isolated from the outside by a curing material.

FIG. 1 shows a curing sheet 11 provided inside the glass material 7 on the work floor as a curing material, and the curing sheet 11 reaches the upper surface of the floor portion 3 on the work floor. The curing material and its arrangement are not particularly limited, but in any case, it is not necessary to install a large-scale curing material outside the structure.

(2. Method of removing asbestos-containing material 9)
In the removing method of the present embodiment, first, the asbestos-containing material 9 around the steel frame beam 1 is removed except for the asbestos-containing material 9 outside the steel frame beam 1, and as shown in FIG. 1, the web 15 of the steel frame beam 1 is removed. Expose the inner surface of the.

Then, as shown in FIG. 2A, a through hole 19 is formed in the web 15 from the inside of the steel frame beam 1 (opposite side of the asbestos-containing material 9). The through hole 19 can be opened in a size corresponding to the beam of the steel frame beam 1, and has a diameter of, for example, about 300 mm.

At the time of forming the through hole 19, as shown in FIG. 3A, a plurality of small holes 17 (holes) are continuously drilled along the outer edge 191 of the portion to be formed of the through hole 19 to be small. The portion 192 surrounded by the hole 17 is separated from the web 15. As a result, the through hole 19 is formed as shown in FIG. 3 (b) without using fire.

After forming the through hole 19 in this way, a tool is inserted into the through hole 19 from the inside of the steel frame beam 1, the asbestos-containing material 9 outside the steel frame beam 1 is crushed with the tool, and the asbestos-containing material 9 outside the steel frame beam 1 is removed by taking it out from the through hole 19. .. FIG. 2B shows a state in which the asbestos-containing material 9 on the outside of the steel frame beam 1 is removed.

When removing the asbestos-containing material 9, in order to prevent the scattering of dust, if necessary, the asbestos-containing material 9 is moistened by watering, the dust is sucked by vacuum, and the asbestos fiber solidifying agent is sprayed. Work such as coating is performed in parallel.

As described above, in the present embodiment, the through hole 19 is formed in the web 15 from the inside of the steel frame beam 1, and the asbestos-containing material 9 outside the steel frame beam 1 is removed from the inside of the steel frame beam 1 through the through hole 19. can. Therefore, even when a sufficient working space cannot be secured due to a slight gap on the outside of the steel frame beam 1, the asbestos-containing material 9 can be easily removed in a short time without using a special jig. ..

In the present embodiment, the asbestos-containing material 9 is present in a slight gap between the steel beam 1 located on the outer peripheral portion of the structure and the exterior finishing material 5 on the outside thereof, but the asbestos-containing material 9 is contained without removing the exterior finishing material 5. Since the material 9 can be removed, the construction period is shortened. Further, since the asbestos-containing material 9 inside the exterior finishing material 5 is removed while leaving the exterior finishing material 5, it is not necessary to prevent dust from scattering to the outside of the structure and to perform a large-scale curing on the outside of the structure. Further, if the method for removing the asbestos-containing material 9 of the present embodiment is applied at the time of dismantling the structure, the asbestos-containing material 9 can be removed prior to the dismantling of the structure, so that the entire dismantling work period can be shortened.

In the present embodiment, the exterior finishing material 5 is provided on the outside of the steel frame beam 1, but the same effect as described above can be said when there is another exterior material such as the glass material 7. Here, the exterior material refers to all members provided on the outer edge of the structure, and includes the outer wall and the like.

Further, in the present embodiment, the through hole 19 of the web 15 of the steel frame beam 1 can be easily formed without using fire by removing the portion 192 surrounded by the plurality of small holes 17 drilled by a drill or the like. It can eliminate the risk of fire.

Further, the fact that the removal work can be easily performed by the method of the present embodiment is particularly effective at the time of removing the asbestos-containing material 9, which conventionally required a time-consuming work.

However, the present invention is not limited to this. For example, in the present embodiment, the case where the molded plate 9a and the coma material 9b are removed as the asbestos-containing material 9 has been described, but the removal method of the present invention can also be applied to the case where the sprayed material is removed as the asbestos-containing material 9. It can also be applied to the removal of objects containing harmful substances other than asbestos, which are stipulated by various laws and regulations, and objects that do not contain harmful substances such as asbestos.

Further, in the present embodiment, the asbestos-containing material 9 is crushed and removed by passing a tool through the through hole 19, but the present invention is not limited to this. For example, in the case of a sprayed material, the asbestos-containing material 9 may be removed by passing a hand or a tool through the through hole 19 and scraping the asbestos-containing material 9 with the hand or the tool. Further, although it may be difficult to see the sprayed material or the like from the inside of the steel frame beam 1, a camera attached to the head of the worker or the tip of the keren rod is inserted into the through hole 19 to remove the asbestos-containing material 9. It is also possible to confirm by visual inspection or the like and surely remove the asbestos-containing material 9.

Further, in the present embodiment, an example of removing the asbestos-containing material 9 provided on the steel beam 1 on the outer periphery of the structure has been described, but the same applies to the asbestos-containing material 9 provided on the steel beam 1 inside the structure. The asbestos-containing material 9 can be applied even when the asbestos-containing material 9 is present in a slight gap between the steel beam 1 and another member (object) or the like provided apart from the steel beam 1. 9 can be easily removed.

Further, in the present embodiment, the case of removing the asbestos-containing material 9 adhering to the steel frame beam 1 which is an H-shaped steel has been described, but the removal method of the present invention is a case of removing an object adhering to another member. Can also be applied to. For example, as shown in FIG. 4A, when the asbestos-containing material 27 is provided on the steel frame column 21 made of H-shaped steel composed of the flange 23 and the web 25, the web 25 is provided from the opposite side of the asbestos-containing material 27. A through hole 29 is formed, and the asbestos-containing material 27 can be removed by using the through hole 29 in the same manner as described above. The member is not limited to H-shaped steel, but may be L-shaped steel or I-shaped steel.

Further, the member is not limited to a steel material, and may be made of concrete, or may be various panel materials or the like. Further, the member is not limited to a beam or a column, and may be a floor portion such as a slab. For example, as shown in FIG. 4B, when the asbestos-containing material 37 is provided under the floor portion 31 made of concrete or the like, a through hole 39 is formed in the floor portion 31 from the upper side of the floor portion 31 and penetrates through the floor portion 31. The asbestos-containing material 37 can be removed in the same manner as described above by using the holes 39.

In the case of FIGS. 4 (a) and 4 (b), the exterior finishing material 5 and obstacles 35 (curing sheet) such as various machines, generators, and water tanks are on the asbestos-containing materials 27 and 37 of the steel column 21 and the floor 31. 33 is covered), and there is only a slight gap, but asbestos-containing materials 27 and 37 can be easily removed by forming through holes 29 and 39 in the steel frame column 21 and the floor 31 by the method of the present invention. can do.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1: Steel beam 3, 31: Floor 5: Exterior finishing material 7: Glass material 9, 27, 37: Asbestos-containing material 11, 33: Curing sheet 13, 23: Flange 15, 25: Web 17: Small hole 19, 29, 39: Through hole 21: Steel column 35: Obstacle

Claims (3)

A removal method that is provided so as to come into contact with a member of a structure and removes an object in a gap between the member and the exterior material of the structure.
It said member, and boring to continuously a plurality of holes from the inner side of said member, forming a through hole disconnects the portion surrounded by the bore,
A step of removing the object from the inside of the member through the through hole, and
A removal method comprising. The removal method according to claim 1, wherein the object contains asbestos. When removing the object
The object is crushed with a tool inserted through the through hole, and the object is taken out from the through hole.
Pass the hand or tool through the through hole and scrape off the object with the hand or tool.
The removal method according to claim 1 or 2, wherein the removal method is characterized by the above.

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