JP2006029001A - Interior installation protective structure in cylindrical demolition structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To demolish a cylindrical structure having an interior structure such as piping equipment under use while protecting the structure from demolished pieces or the like falling down from above. <P>SOLUTION: A floor 3 is formed on the interior installation structure (steam pipes 2) in the inside of a cylindrical structure (chimney 1) to be demolished. An opening 5 is provided at the upper side of a zone where no installation structure exists and a wall 4 is constructed at the side of the opening 5 of the interior installation structure. The floor 3 is inclined downward toward the opening 5. The interior installation structure is protected from the demolished pieces 7 or the like falling down at the floor 3 and the wall 4 and these pieces are rolled toward the opening on the floor 3 and naturally dropped. Accordingly, the interior installation structures 7 or the like are protected from the demolished pieces 7 or the like and the cylindrical structure can be demolished. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, when disassembling a cylindrical structure having an internal object such as piping equipment in use, the internal object is prevented from being damaged by a dismantling piece falling from above. The present invention relates to a built-in structure protection structure in structure dismantling.

  Conventionally, when a cylindrical structure such as a chimney is crushed from the upper part and disassembled, the dismantled piece may fall from above through the inside of the cylindrical structure. There is also a dismantling method in which the cylindrical structure is crushed and the crushed block piece is dropped through the hollow portion of the cylindrical structure and removed from the lower opening provided in the bottom (see, for example, Patent Document 1). .)

By the way, when an internal installation exists in the inside of a cylindrical structure, for example, piping facilities etc. may be installed using the internal space of the chimney which has deteriorated and is not used.
JP 2003-184320 A

  As described above, when there is a piping facility or the like in use inside the chimney, the chimney cannot be simply crushed and disassembled as in the prior art. This is because if the piping equipment in use is damaged, the facility such as the factory may be stopped suddenly or may lead to a major accident.

  An object of the present invention is to dismantle a cylindrical structure having an internal object such as a piping facility in use while protecting the internal object from a dismantling piece falling from above.

  In order to solve the above-described problems, the internal object protection structure in the tubular structure disassembly of the invention described in claim 1 is, for example, as shown in FIG. 1, the interior of the tubular structure (chimney 1) to be disassembled. The floor part 3 provided above the internal structure (steam pipe 2) is provided, and the floor 5 is provided with an opening 5 above a region where the internal structure is not present.

  In this way, when the dismantled cylindrical structure has an internal object to be protected, the floor part 3 falls from above by providing the floor part 3 above the internal object. Block the dismantling piece 7 etc. coming. Further, by providing the opening 5 above the area of the floor 3 where there is no internal object, the dismantling piece 7 or the like falls through the opening 5 to the bottom of the cylindrical structure. Therefore, the internal structure can be protected from the dismantling piece 7 and the like, and the cylindrical structure can be dismantled.

  According to a second aspect of the present invention, in the internal object protection structure in the tubular structure disassembly according to the first aspect, for example, as shown in FIG. It is provided with the wall part 4 provided.

  In this way, by providing the wall 4 on the side of the opening 5 side of the internal object, the wall 4 blocks the dismantling piece 7 and the like falling through the opening 5 in an oblique direction, An object can be protected from the dismantling piece 7 or the like.

  According to a third aspect of the present invention, in the internal object protection structure in the tubular structure disassembly according to the first or second aspect, for example, as shown in FIG. 1, the floor 3 faces the opening 5. And is inclined downward.

  In this way, by tilting the floor 3 downward toward the opening 5, the dismantling piece 7 falling on the floor 3 is rolled toward the opening 5 without staying and dropped naturally. Can do.

  According to a fourth aspect of the present invention, in the internal object protection structure in the tubular structure dismantling according to any one of the first to third aspects, for example, as shown in FIG. And a steel frame base 6 fixed to the inner wall surface of the cylindrical structure. The floor part 3 and the wall part 4 are attached to the steel frame base 6.

  In this way, the steel frame 6 is assembled so as to surround the internal structure, fixed to the inner wall surface of the tubular structure, and the floor 3 and the wall 4 are attached to the steel frame 6 so as to fall from above. The impact of the piece 7 or the like can be supported by the cylindrical structure, and the internal object can be firmly protected.

  According to a fifth aspect of the present invention, in the internal structure protection structure in the tubular structure dismantling according to any one of the first to fourth aspects, for example, as shown in FIG. The wall portion 4 is an iron plate.

  In this way, by forming the floor portion 3 with a concrete slab and forming the wall portion 4 with an iron plate, a high-strength member is used for the floor portion 3 that receives a large impact, compared with the wall portion 4 with a relatively low impact. By using a member with low mechanical strength, it is possible to efficiently protect the internal objects and to reduce the labor and cost of construction.

  According to the first aspect of the present invention, when disassembling the tubular structure, the floor portion is provided above the internal structure inside the tubular structure to be disassembled, Since the opening is provided above the area where there is no internal object, the dismantling pieces that fall from above are blocked by the floor, fall through the opening to the bottom of the cylindrical structure, The structure is protected from demolition pieces.

  According to the second aspect of the present invention, since the wall portion provided on the side of the opening of the internal object is provided, the dismantling pieces that fall through the opening in an oblique direction are dropped by the wall. It is blocked and the internal objects are protected from dismantling pieces.

  According to the invention described in claim 3, since the floor portion is inclined downward toward the opening portion, the dismantling pieces falling on the floor portion roll toward the opening portion without staying and are naturally dropped. The

  According to the fourth aspect of the present invention, the steel frame is assembled so as to surround the internal structure and is fixed to the inner wall surface of the cylindrical structure, and the floor and the wall are attached to the steel frame. Therefore, the impact of the dismantling pieces falling from above is received by the cylindrical structure, and the internal object is firmly protected.

  According to the invention described in claim 5, since the floor portion is a concrete slab and the wall portion is an iron plate, a member having a high strength is used for the floor portion receiving a large impact, and a member having a relatively low strength is compared. It is used for the wall part with little impact, so that the internal objects are efficiently protected, and the labor and cost can be reduced.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the cylindrical structure is a chimney 1 that is hollow and constructed of reinforced concrete. The chimney 1 has a diameter that is enlarged from the top to the bottom. The chimney 1 is not used because it is old, and is located inside the factory 11 which is a building at a height where the chimney 1 is located.

  Here, a steam pipe 2 (internal object) having a diameter of 900 mm is installed inside the chimney 1 by using the space. The steam pipe 2 requires expansion and contraction bends at regular intervals to absorb the expansion and contraction, and the expansion and contraction bends are installed inside the chimney 1 along the inner wall surface of the chimney 1. If the steam pipe 2 is damaged by the falling demolition piece 7 or the like when the chimney 1 is dismantled, the factory 11 will be completely shut down, causing tremendous noise in the vicinity, which may lead to personal injury. Become.

  Therefore, the internal structure protection structure in the tubular structure dismantling of the present embodiment includes a floor portion 3 provided above the steam pipe 2 inside the chimney 1 to be dismantled as shown in FIGS. I have. The floor 3 is provided with an opening 5 formed in a circular shape in a region where the steam pipe 2 is not provided, that is, in the center of the cross section of the chimney 1. Moreover, the wall part 4 provided in the side by the side of the opening part 5 of the steam piping 2 is provided. Further, the steel frame 6 is assembled so as to surround the steam pipe 2 and is fixed to the inner wall surface of the chimney 1, and the floor 3 and the wall 4 are attached to the steel frame 6.

  Since the floor portion 3 receives a large impact, the floor portion 3 is a concrete slab having a vertical thickness of 300 mm and is inclined downward toward the opening 5. The wall 4 is made of an iron plate having a thickness of 12 mm because of relatively little impact. Further, the protective structure is constructed without a gap so that the dismantling pieces do not enter the boundary between the inner wall surface and the floor portion 3 of the chimney 1 and the floor portion 3 and the wall portion 4.

  The floor 3 blocks the dismantling pieces 7 and the like falling from above, and the wall 4 blocks the disassembling pieces 7 passing through the opening 5 in an oblique direction and drops, and the dismantling pieces 7 and the like through the opening 5 Since it is dropped, the chimney 1 can be dismantled while protecting the steam pipe 2 from the dismantling piece 7 and the like. Further, the dismantling piece 7 falling on the floor portion 3 by tilting the floor portion 3 can be rolled toward the opening portion 5 without staying and can be dropped naturally.

  The steel frame 6 is made of a steel material such as H-shaped steel. Specifically, an upper steel material 6a disposed in an oblique direction supporting the floor portion 3, a side steel material 6b disposed substantially vertically to which the wall portion 4 is attached, and a lower steel material 6c disposed in a substantially horizontal direction. Become. One end portions of the upper steel material 6a and the lower steel material 6c are joined and fixed via a chemical anchor 6d or the like driven into the cylinder of the chimney 1, and the other end portions thereof are respectively connected to the upper end portions of the side steel materials 6b, One set is joined to the lower end and assembled at a predetermined interval from the steam pipe 2, and a plurality of sets are arranged radially around the opening 5.

  As described above, the steel frame 6 is assembled by surrounding the steam pipe 2, and the upper part is efficiently protected by the floor part 3 of the concrete slab and the side part 4 of the steel plate so that the labor and cost are reduced. it can.

  Next, a method for disassembling the chimney 1 while protecting the steam pipe 2 with the protective structure having the above configuration will be described. The part higher than the rooftop of the factory 11 of the chimney 1 is to be dismantled. First, as shown in FIG. 1, a single pipe scaffold 8 (main scaffold) is assembled from the roof of the factory 11 to the vicinity of the top of the chimney 1 along the outer periphery of the chimney 1. Between the single pipe scaffold and the chimney 1, wall connections are appropriately provided and connected at predetermined intervals in the circumference and vertical direction of the chimney 1. In addition, the single-tube scaffold 8 is provided with an elevating staircase 9 for ascending and descending workers at appropriate positions along the outer periphery of the chimney 1. The scaffold may be a frame scaffold, a bracket scaffold, a steel pipe pipe scaffold, or the like, or a combination thereof.

  The scaffold material on the outer periphery of the single-tube scaffold 8 is protruded by a predetermined height from the height of the top of the chimney 1, and the curing sheet 10 covers the vicinity of the upper part of the scaffold, for example, the outer periphery of the four-stage scaffold. Thereby, scattering of the dust etc. which arise by dismantling work to the circumference | surroundings can be prevented.

  Further, in the chimney 1, the steel frame 6 is assembled so as to surround the steam pipe 2 and fixed to the inner wall surface of the chimney 1. And the concrete slab which is the floor part 3 is formed in the upper part of this steel frame stand 6, and the iron plate which is the wall part 4 is attached to the side part by the side of the opening part 5. FIG.

  Next, the chimney 1 which is a reinforced concrete structure is crushed with a concrete cutter or the like, and the exposed steel material is cut and disassembled. These crushed concrete block pieces and cut pieces of steel pieces 7 fall through the hollow portion of the chimney 1. In the middle of the fall, the vapor pipe 2 passes through the opening 5 and deposits on the bottom of the chimney 1 while hitting the floor 3 and the wall 4 at the place where the steam pipe 2 is arranged. The accumulated dismantling pieces 7 are appropriately removed from the lower opening (not shown).

  The size and the cutting length of the concrete and steel material are set to a block piece and a steel material piece that are large and long enough not to be caught in the opening 5 when falling in the chimney 1.

  In this way, a hopper-shaped curing floor is provided around the steam pipe 2 and the steam pipe 2 is not damaged by the falling dismantling piece 7 or the like, that is, the factory 11 is not stopped and an accident occurs. The chimney 1 can be dismantled without it.

In the above embodiment, the object to be disassembled is a reinforced concrete chimney, but the present invention is not limited to this, and may be a steel chimney or other tubular structure that can be disassembled.
In addition, the shape of the floor, wall, or steel frame can be changed as appropriate according to the shape of the internal structure to be protected, and other details such as the detailed structure can be changed as appropriate. Of course.

It is whole sectional drawing which shows the mode of a chimney dismantling in one embodiment to which this invention is applied. It is a top view which shows the piping protection structure in the chimney of one Embodiment to which this invention is applied. It is sectional drawing which shows the piping protection structure in the chimney of one Embodiment to which this invention is applied.

Explanation of symbols

1 Chimney (tubular structure)
2 Steam piping (internal)
3 Floor 4 Wall 5 Opening 6 Steel frame 6a Upper steel 6b Side steel 6c Lower steel 6d Chemical anchor 7 Demolition piece 8 Single pipe scaffold 9 Lifting staircase 10 Curing sheet 11 Factory

Claims (5)

Comprising a floor provided above the internal structure inside the tubular structure to be dismantled;
An internal object protection structure in a tubular structure dismantling characterized in that an opening is provided above the area where no internal object is present on the floor.   The in-object protection structure for disassembling a cylindrical structure according to claim 1, further comprising a wall provided on a side of the in-installation on the opening side.   The internal structure protection structure in a tubular structure dismantling according to claim 1 or 2, wherein the floor portion is inclined downward toward the opening. The steel frame is assembled so as to surround the inner structure, and is fixed to the inner wall surface of the cylindrical structure.
The internal structure protection structure in the tubular structure dismantling according to any one of claims 1 to 3, wherein the floor portion and the wall portion are attached to the steel frame mount.   5. The internal structure protection structure in the dismantling of the cylindrical structure according to claim 1, wherein the floor portion is a concrete slab, and the wall portion is an iron plate.

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