JP5764073B2 - Scatter prevention structure and method of removing external spray - Google Patents

Description

  The present invention relates to a scattering prevention structure and a method for removing an external spray when building demolition, particularly when asbestos is removed.

  Asbestos (asbestos) may be contained in fireproof materials, heat insulating materials, soundproofing materials, etc. installed or sprayed on wall surfaces, top plates (ceilings), floor slabs, beams, pillars, and the like.

When dismantling an existing building containing asbestos, it is necessary to consider that dust containing asbestos fibers does not scatter in the work site or the surrounding area.
For this reason, a number of technologies have been developed to prevent dust scattering during the dismantling of existing buildings.

  For example, in Patent Document 1 and Patent Document 2, in the asbestos removal work of an existing building containing asbestos or secondary asbestos products, the entire building is covered with a tent, and the inside of the tent is made a negative pressure space, so that dust is exposed to the outside. An asbestos removal method for preventing the dust from scattering is disclosed.

Utility Model Registration No. 3116813 JP 2007-247367 A

When the asbestos removal method is adopted in a large-scale existing building, it takes time and effort to cover it with a tent.
In addition, dust may be scattered inside the tent, and dust may be scattered throughout the building. Therefore, it is necessary to separately handle dust scattered in the building.
Furthermore, it is necessary to secure a temporary storage place for the removed asbestos, and it is also necessary to sufficiently consider the prevention of scattering at the temporary storage place.

  An object of the present invention is to solve the above-described problems, and can be easily configured, and can further improve the efficiency of the sprayed object removal work and It is an object to provide a method for removing an external spray.

In order to solve the above-mentioned problems, the scattering prevention structure of the present invention is installed inside the building, the first scattering prevention material covering the outer wall of the building, the temporary support material installed along the outer surface of the outer wall, and and a second scatter preventing member, and the outer wall, said upper end to the outer wall, the first working space bottom and both ends are sealed by said first scatter preventing member joined along the outer surface of the building An opening that is formed so as to cover from the upper part of the building to the ground part , the second working space covered with the second anti-scattering material is formed inside the building, and penetrates a part of the outer wall The first work space and the second work space communicate with each other via an opening, and an entrance is formed in the second work space.

According to such a scattering prevention structure, since the first work space is formed using the outer wall, it is possible to cure only the necessary part, and the configuration is simple and inexpensive regardless of the size of the existing building. be able to.
Moreover, if the second work space formed in the building is used as a temporary storage place for waste generated during work, dust can be prevented from scattering outside the second work space.

The first scattering prevention material may be separated for each temporary scaffolding over a plurality of stages constituting the temporary support material and may cover the temporary scaffolds .

Another scattering prevention structure of the present invention for solving the above-mentioned problem is provided with a building and a scattering prevention material that covers the inner surface of the building, and is sealed between the inner surface of the building and the scattering prevention material. A space is formed below the ceiling surface of the building and along a temporary support material arranged away from the wall surface of the building, and the work space is formed in a part of the scattering prevention material. It is characterized by being able to enter and exit only from the entrance.

This scattering prevention structure also uses the inner surface of the building (the surfaces of walls, ceilings, floor slabs, beams, pillars, etc.) to form work spaces, so it is possible to cure only the necessary parts. Regardless of the size of the building, it can be configured simply and inexpensively.
Further, if the work space formed in the building is used as a temporary storage place for waste generated during work, dust can be prevented from scattering outside the work space.

Further, the method for removing an external sprayed article of the present invention is a method for removing an external sprayed article sprayed on the outer wall of an existing building, wherein the first scattering prevention material is joined to the outer wall at its upper end, lower end and both ends. the covers from the top of the outer wall to the ground portion, and forming a first working space which is sealed enclose with the first scatter preventing member and an outer wall, a second scatter preventing member installed inside the building by A step of forming a second work space, a step of bringing the first work space and the second work space into a negative pressure state, and a step of removing the external sprayed material in the first work space; It is characterized by having.

  According to such a method for removing external spray, since a negative pressure space is formed using a part of the building, the external spray can be easily and inexpensively removed regardless of the scale of the existing building. Is possible. It is also possible to prevent dust and the like from scattering into the building.

  According to the anti-scattering structure and the method for removing external sprays of the present invention, it is possible to carry out the spray removal work for buildings easily and inexpensively and more efficiently.

It is sectional drawing which shows the outline | summary of the scattering prevention structure which concerns on 1st embodiment. It is the elements on larger scale of FIG. It is sectional drawing which shows the construction condition of the fall prevention member. (A) And (b) is sectional drawing which shows each work condition of a spraying thing removal work. It is sectional drawing which shows the outline | summary of the scattering prevention structure which concerns on 2nd embodiment. It is AA sectional drawing of FIG. It is sectional drawing which shows the outline | summary of the scattering prevention structure which concerns on another form.

<First embodiment>
The scattering prevention structure of the first embodiment will be described with reference to the drawings.
This embodiment demonstrates the case where the external spraying thing sprayed on the outer wall of a building is removed using the scattering prevention structure 1. FIG.

  As shown in FIG. 1, the scattering prevention structure 1 includes an outer wall 2 of a building B, a temporary support member 3, a first scattering prevention member 4, and a second scattering prevention member 5.

As shown in FIG. 2, the outer wall 2 includes an outer wall panel 21, an external spray 22 sprayed on the outer surface of the outer wall panel 21, and an exterior plate 23 installed so as to cover the surface of the external spray 22. And are stacked.
The configuration of the outer wall 2 is not limited.

As shown in FIG. 1, the temporary support member 3 is installed outside the outer wall 2 and supports the first scattering prevention member 4.
In the present embodiment, the temporary support member 3 is configured by a temporary scaffold assembled along the outer wall 2, but the structural material forming the temporary support member 3 is not limited.

  The temporary support member 3 is connected to the outer wall 2 via a fall prevention member 31 (see FIG. 3) fixed to the beam of the building B so as not to fall. In addition, the temporary support material 3 does not necessarily need to be fixed to the beam, and may be fixed to another housing such as a column or a structural wall.

  The first scattering prevention material 4 covers the outer surface of the outer wall 2 by covering the outer side of the temporary support material 3 (the side opposite to the outer wall 2).

The upper end of the first scattering prevention material 4 is sealed at the upper part of the building B. Further, the lower end of the first scattering prevention material 4 is sealed at the lower part of the building B. Further, both ends of the first scattering prevention member 4 are sealed at the end of the outer wall of the building B, although illustration is omitted.
By doing in this way, the 1st scattering prevention material 4 forms the sealed 1st working space S1 between the outer walls 2.
In addition, if the installation method of the 1st scattering prevention material 4 can form sealed space (1st working space S1) between the outer walls 2, it will not be limited. For example, when the first scattering prevention material 4 makes a round around the building B, the ends of the first scattering prevention material 4 may be joined to each other.
In this embodiment, the roof is formed by disposing the panel material across the roof of the building B and the upper end portion of the temporary support member 3, but the roof may be formed as necessary.

The first work space S1 is formed along the outer surface of the building B. In the present embodiment, a negative pressure dust suction machine (not shown) is used to place the first work space S1 in a negative pressure state.
In addition, arrangement | positioning and the number of installation locations of a negative pressure dust collector are determined with the required ventilation volume per time with respect to the volume of isolation space (1st working space S1).

  The second anti-scattering material 5 is installed inside the building B (inside the room), and divides the inside of the building B into a second work space S2 and a non-work space S3.

The second work space S2 is a space sealed by the second anti-scattering material 5, and is formed so that dust generated during the work is not discharged into the non-work space S3.
The non-working space S3 is a space that does not face the external sprayed object 22, and is a space outside the second scattering prevention material 5.

  The 2nd scattering prevention material 5 of this embodiment is formed in the cylinder shape or the gate shape as shown in FIG. The end of the second scattering prevention material 5 is in close contact with the inner surface of the outer wall 2. The second work space S2 is in a negative pressure state using a negative pressure dust collector (not shown). In addition, arrangement | positioning and the number of installation locations of a negative pressure dust collector are determined with the required ventilation volume per time with respect to the volume of isolation space (2nd work space S2).

In the second scattering prevention material 5 (second work space S2), an entrance / exit 51 for entering and exiting the second work space S2 is formed at the end on the opposite side of the outer wall 2.
The entrance / exit 51 leads to the clean booth 6.

In this embodiment, three clean booths 6, 6 and 6 are continuously arranged.
The clean booth 6 is a space (security zone) that uses an air shower or the like to remove dust and the like attached to a worker who goes outside (non-work space S3) from the entrance / exit 51 of the second work space S2. Dust generated with the operation of removing the sprayed object 22 is prevented from being discharged outside the work space (the first work space S1 and the second work space S2).
The configuration of the clean booth 6 is not limited. Further, the number of clean booths 6 is not limited and may be set as appropriate. Furthermore, the clean booth 6 may be installed as necessary and may be omitted.

The first work space S1 and the second work space S2 communicate with each other through an opening 7 formed so as to penetrate a part of the outer wall 2.
The first work space S <b> 1 is configured to be accessible only from the opening 7. That is, in order to perform work in the first work space S1, after passing through the clean booths 6, 6 and 6 and entering the second work space S2 from the entrance 51, the first work space passes through the opening 7. It is necessary to move to S1.

Next, the removal method of the external spraying thing using the scattering prevention structure 1 of this embodiment is demonstrated.
The method for removing the external spray includes a first work space forming process, a second work space forming process, a work space negative pressure process, an opening forming process, and a spray product removing process.

  In the first work space forming step, after assembling the temporary support material 3 along the outer surface of the outer wall 2, the outer wall 2 is covered with the first scattering prevention material 4 so that the first scattering prevention material 4 and the outer wall 2 are surrounded. This is a step of forming the first working space S1.

As the temporary support member 3 is assembled, as shown in FIG. 3, the fall prevention member 31 is installed on a building frame (beam or the like).
The fall prevention member 31 is attached by cutting out the outer wall 2 at every predetermined height. The outer wall 2 is cut away in a state in which the periphery of the cut portion is covered with the curing sheet 8 so that dust is not scattered around.

In this embodiment, a so-called glove back method is employed. That is, a part of the excision is covered with a curing sheet 8 partially formed in a glove shape, a hand is inserted into the glove part 81 from the outside of the curing sheet 8, and a tool or the like is operated inside the curing sheet 8. Do work. The anti-scattering material 32 is applied to the external spray 22 exposed by excision, and the cover is cured.
In addition, the curing method at the time of excision of the outer wall 2 is not limited.

  When the installation of the fall prevention member 31 is completed, the curing sheet 8 is removed. At this time, using a vacuum cleaner (not shown), dust generated due to the drilling, fragments of the outer wall 2 and the like are removed.

  When there is a crack or the like in the outer wall 2, a weathering curing is performed from the inside of the building B as necessary. The weathering is performed by closing (sticking) cracks or the like of the outer wall 2 with the weathering material 24. In addition, the structure of the weathering material 24 is not limited, For example, it can also carry out by sticking a poly sheet along a crack etc.

When the temporary support material 3 is formed, the first scattering prevention material 4 is installed outside the temporary support material 3 to cover the outer wall 2.
In the present embodiment, the first scattering prevention material 4 covers the building B from the roof to the ground .

  The second work space forming step is a step of forming the second work space S1 by installing the second scattering prevention material 5 inside the building B.

One end of the second scattering prevention material 5 is brought into close contact with the inner surface of the outer wall 2 so as to cover the periphery of the place where the opening 7 is to be formed.
A clean booth 6 is connected to the other end (entrance / exit 51) of the second scattering prevention member 5.

  The work space negative pressure step is a step of bringing the first work space S1 and the second work space S2 into a negative pressure state.

  In the first work space S1 and the second work space S2, negative pressure dust collectors (not shown) are respectively installed at predetermined positions. By operating the negative pressure dust collectors, the first work space S1 and the second work space. The inside of S2 is set to a negative pressure state.

The opening forming step is a step of forming the opening 7 in a part of the outer wall 2.
The work for forming the opening 7 is performed from the second work space S2 (inside the building B).
Waste generated with the formation of the opening 7 is stored in the second work space S2.

In the present embodiment, the opening 7 is formed on each floor so that the movement from each floor to the work location (first work space S1) is possible.
The arrangement of the openings 7 is not limited. Moreover, you may perform formation of the opening part 7 from the 1st work space S1 side (outside of the building B). Moreover, you may utilize the existing window, an entrance, etc. as the opening part 7. As shown in FIG.

  The sprayed object removal step is a step of performing a removal operation of the external sprayed material 22 (see FIG. 2) sprayed on the outer wall 2.

In the sprayed object removal step, first, as shown in FIG. 4A, the exterior material 23 installed on the outer surface of the outer wall 2 is removed in the first work space S1.
Next, as shown in FIG. 4B, the external spray 22 is peeled off from the upper part using a keren rod or the like.
The peeled external spray 22 is received by a spill prevention material (not shown) installed in advance at a predetermined height.

  The external spray 22 received by the spill prevention material is temporarily stored in the second work space S2.

  When the removal work of the external spray 22 is completed, the waste in the second work space S2 is removed, the first scattering prevention material 4 and the second scattering prevention material 5 are removed, and the temporary support material 3 is removed.

As described above, according to the scattering prevention structure and the external sprayed object removal method of the present embodiment, since the first work space S1 is formed using the outer wall 2, the amount of the first scattering prevention material 4 used is reduced. can do.
Also, the volume of the work space (first work space S1) is minimized by covering not only the entire building B but only the work location.

  Further, since it is possible to move from the inside of the building B to the first working space S1 through the second working space S2, the work location (first working space S1) is accessed at the shortest distance from the inside of the building B. can do. Therefore, the labor of movement can be omitted and the workability is excellent.

  Since the waste generated by the work is stored in the second work space S2, which is a negative pressure sealed space, it is not necessary to secure a separate storage place outside, and the labor of transportation to the storage place is omitted. Can do. Therefore, it is excellent in workability and economy.

  Since the openings 7 (entrance / exit 51) are provided on a plurality of floors, parallel work can be performed at a plurality of locations, and the construction period can be shortened.

  Even if a part of the first anti-scattering material 4 or the second anti-scattering material 5 is damaged by keeping the first working space S1 and the second working space S2 in a negative pressure state, dust is externally generated. Etc. are prevented from leaking out.

  Since the second work space S2 is also formed inside the building B, dust is prevented from being scattered inside the building B other than the second work space S2.

<Second Embodiment>
The scattering prevention structure of 2nd embodiment is demonstrated with reference to drawings.
This embodiment demonstrates the case where the spraying thing sprayed on the ceiling slab 9a and wall member 9b, 9b (surface material) inside the building B is removed using a scattering prevention structure.

  As shown in FIG. 5, the scattering prevention structure 1 includes a ceiling plate 9 a and wall members 9 b and 9 b of the building B, a temporary support member 3, and a scattering prevention member 4.

The face material 9 (ceiling slab 9a and wall members 9b and 9b) includes a main body 91, a spray 92 sprayed on the surface of the main body 91, and a makeup installed so as to cover the surface of the spray 92. A plate 93 is laminated.
In addition, the structure of the face material 9 (ceiling slab 9a and wall members 9b and 9b) is not limited. Further, the scattering prevention structure 1 is not limited to the case including the ceiling plate 9a and the wall member 9b, and may include, for example, a floor slab, a beam, a column, and the like.

As shown in FIG. 5, the temporary support material 3 is installed along the inner surface of the face material 9 and supports the scattering prevention material 4.
In the present embodiment, the temporary scaffolding is assembled by the temporary scaffolds assembled along the inner surfaces of the wall members 9b and 9b and the temporary beam members 3a and the scaffold plates 3b that are horizontally mounted on the left and right temporary scaffolds along the lower surface of the ceiling slab 9a. However, the structure of the temporary support material 3 is not limited.

  The scattering prevention material 4 covers the temporary scaffold, the temporary beam material 3a, and the scaffold plate 3b.

  Both ends of the scattering prevention material 4 are sealed at the floor surface 9c. By doing in this way, the sealed work space S1 is formed between the ceiling slab 9a and the wall members 9b and 9b.

  The work space S1 is formed along the inner surfaces of the ceiling plate 9a and the wall members 9b and 9b. In the present embodiment, the working space S1 is in a negative pressure state using a negative pressure dust suction machine (not shown).

  A part of the scattering prevention material 4 is formed with a doorway (not shown) so as to be able to enter and leave the work space S1 from the non-work space S3.

The doorway leads to a clean booth (not shown).
Since the configuration of the clean booth is the same as that shown in the first embodiment, a detailed description is omitted.

As mentioned above, according to the scattering prevention structure 1 of this embodiment, since the work space S1 is formed using the inner surface of a building, the usage-amount of the scattering prevention material 4 can be reduced.
Moreover, the volume of work space S1 is suppressed to the minimum by covering not only the whole building B but only the work location.

  Since the waste generated during the work can be stored in the work space S1, which is a negative pressure sealed space, it is not necessary to secure a separate storage place outside, and there is no need for transportation to the storage place. Can be omitted. Therefore, it is excellent in workability and economy.

  The embodiment according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and the above-described components can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the case where the scattering prevention material 4 is installed along the temporary support material 3 has been described. However, if it is possible to seal the work space S1, the installation method of the scattering prevention material 4 is the same. It is not limited. For example, as shown in FIG. 7, the temporary support material 3 may be configured not to contact dust or the like by being disposed so as to cover each material constituting the temporary support material 3. By doing so, when the temporary support material 3 is reused, the work of removing dust and the like adhering to the temporary support material 3 can be omitted. In addition, the temporary support material 3 does not necessarily need to be covered with the scattering prevention material 4, and the poly film curing 41 etc. may be given.

In addition, the temporary support material may be installed as necessary, and is not necessarily installed.
Further, at the time of construction, the outer periphery is covered with a soundproof panel 10 as necessary (see FIG. 7).

1 scattering prevention structure 2 outer wall 3 temporary support material 4 first scattering prevention material (scattering prevention material)
5 Second scattering prevention material 51 Entrance / exit 6 Clean booth 7 Opening S1 First work space (work space)
S2 Second workspace

Claims (4)

The outer wall of the building,
A first anti-scattering material covering a temporary support material installed along the outer surface of the outer wall;
A second anti-scattering material installed inside the building, and a anti-scattering structure comprising:
A first work space sealed by the outer wall and the first anti-scattering material having an upper end, a lower end, and both ends joined to the outer wall so as to cover from the upper part of the building to the ground part along the outer surface of the building. Formed,
A second work space covered with the second scattering prevention material is formed inside the building,
The first working space and the second working space communicate with each other through an opening that penetrates a part of the outer wall,
An anti-scattering structure, wherein an entrance is formed in the second work space. 2. The scattering according to claim 1, wherein the first scattering prevention material is separated for each temporary scaffolding over a plurality of stages constituting the temporary support material and covers each temporary scaffolding. Prevention structure. The building,
A scattering prevention structure comprising a scattering prevention material that covers the inner surface of the building,
The work space sealed between the inner surface of the building and the anti-scattering material is formed below the ceiling surface of the building and along the temporary support material arranged away from the wall surface of the building. ,
The scattering prevention structure according to claim 1, wherein the working space is accessible only from an entrance / exit formed in a part of the scattering prevention material. A method of removing an external spray sprayed on an outer wall of an existing building,
Upper end the outer wall covers the from the top of the outer wall by a first scatter preventing member lower end and both ends are joined to the ground portion, to form a first working space which is sealed enclose with the first scatter preventing member and the outer wall Process,
A step of forming a second working space by installing a second anti-scattering material inside the building;
Bringing the first work space and the second work space into a negative pressure state;
A step of removing the external sprayed material in the first work space, and a method of removing the external sprayed product.

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