JP6474151B2 - Dismantling system and dismantling method - Google Patents

Description

  The present invention relates to a dismantling system that dismantles an existing building and a dismantling method using the dismantling system, for example.

Traditionally, high-rise buildings have been dismantled due to the aging of facilities and structures.
There are the following methods for dismantling a building.
For example, there is a method in which a mast is installed from the ground surface along an existing building, and the demolition material is unloaded with a tower crane attached to the mast. In this case, the mast is temporarily fixed to the structure of the existing building, and is lowered along with the dismantling of the building (see Patent Document 1).

  However, when a tower crane is used along the existing building from the ground surface, it is necessary to construct a large mast up to the top floor, so there is a problem that the dismantling work becomes large and construction costs increase. It was.

In order to solve this problem, for example, a crane is installed on the existing floor on the top floor of an existing building, and a part of the existing floor where the crane is installed is lifted down along an existing pillar, Proposed a dismantling method for dismantling existing buildings.
Here, there is a case where a temporary scaffold is constructed so as to surround the uppermost floor which is a dismantling space, and the temporary scaffold is slid downward along with the lift down of the floor where the crane is installed.
According to this disassembling method, a large mast is not required, so that construction costs can be reduced. Moreover, since the demolition space is surrounded by a temporary scaffold, scattering of demolition materials and noise can be prevented.

JP 2010-255374 A

  However, in the above dismantling method, since the temporary scaffold cannot be supported from the structure in the dismantling space, there is a problem of how to support the temporary scaffold from the existing building.

  An object of the present invention is to provide a dismantling system and a dismantling method that can reliably support a temporary scaffold surrounding a dismantling space from an existing building.

  The dismantling system according to claim 1 is a dismantling system (for example, a dismantling system 2 to be described later) for dismantling an existing structure (for example, an existing building 1 to be described later), and a predetermined floor (for example, a dismantling system to be described later) A crane installation floor (for example, a crane installation floor 20 to be described later) including a part of an existing floor (for example, an existing floor 14 to be described later) on a roof floor (to be described later), and a support column that is an existing column that supports the crane installation floor. (For example, a support column 11A described later), a crane (for example, a crane 30 described later) installed on the crane installation floor, and a lifting device (for example, described later) for lowering the crane installation floor along the support column Elevating device 40) and a temporary scaffold (for example, an external scaffold 50 described later) provided along the outer periphery of the existing structure, and the temporary scaffold surrounds a portion to be dismantled For example, an upper part 50A described later and a lower part (e.g., described later) having a locking member (e.g., a telescopic bracket 56 described later) which is provided below the upper part and engages a lower floor of the part to be disassembled. A lower portion 50B), and the locking member can project and retract toward the existing structure.

  According to the present invention, the dismantling space is surrounded by the upper part of the temporary scaffolding, and the lower part of the temporary scaffolding is locked to the lower floor of the dismantling space so that the temporary scaffolding is supported by the existing structure. Therefore, even if the demolished space is demolished, the upper part of the temporary scaffold surrounding the demolished space can be reliably supported from the existing building.

In the dismantling system according to claim 1 , a gondola guide (for example, a later-described gondola guide 16) extending substantially vertically is provided on an outer wall surface (for example, an outer wall surface 15 described later) of the existing structure. The temporary scaffold is disposed on both sides of the movable wall joint (for example, a movable wall joint 57 described later) that engages with the gondola guide and is movable along the gondola guide, and is disposed on both sides of the movable wall joint. And a pressing member (for example, a jack 58 described later) that presses the outer wall surface of the existing structure.

  According to this invention, since the outer wall surface of the existing structure is pressed by the pressing member, a tensile force acts on the moving wall connection. Thereby, since the space | interval of a temporary scaffold and the outer wall surface of the existing structure can be hold | maintained, even if wind blows on a temporary scaffold, the attitude | position of this temporary scaffold can be maintained stably.

The dismantling method according to claim 2 is a dismantling method for disassembling an existing structure using the dismantling system described above, including a part of the existing floor in a predetermined floor of the existing structure as a crane installation floor, A first step (for example, Steps S1 and S2 described later) for installing the crane on the crane installation floor and attaching the lifting device and the temporary scaffold, using the existing column supporting the crane installation floor as a support column, A second step (for example, step 3 to be described later) of disassembling a portion of the predetermined floor excluding the crane installation floor and the support pillar using the crane, and driving the lifting device to install the crane The floor is lowered along the support column, the upper part of the support column is removed, the lock by the locking member of the temporary scaffold is released, and the temporary scaffold is moved downward. Then, again, a third step (for example, steps S4 to S6 described later) for locking the locking member of the temporary scaffold to the existing structure, and a fourth step (for example, the second step and the third step) are repeated. Steps S7 to S9) to be described later.

  According to the present invention, the dismantling space is surrounded by the upper part of the temporary scaffolding, and the lower part of the temporary scaffolding is locked to the lower floor of the dismantling space, and the temporary scaffolding is supported by the existing structure. Therefore, even if the dismantling space is dismantled, the upper part of the temporary scaffold surrounding the dismantling space can be reliably supported from the existing building.

It is a top view of the existing building to which the demolition system concerning one embodiment of the present invention is applied. It is a longitudinal cross-sectional view of the existing building which concerns on the said embodiment. It is an enlarged plan view of the dismantling system according to the embodiment. It is an expansion longitudinal cross-sectional view of the dismantling system which concerns on the said embodiment. It is a front view of the external scaffold which concerns on the said embodiment. It is a side view of the external scaffold which concerns on the said embodiment. It is a top view of the external scaffold which concerns on the said embodiment. It is AA sectional drawing of FIG. It is the partially expanded side view of the external scaffold which concerns on the said embodiment. It is a flowchart of the procedure which demolishes the existing building by the demolishing system which concerns on the said embodiment. It is FIG. (1) for demonstrating the procedure which demolishes the existing building by the demolishing system which concerns on the said embodiment. It is FIG. (2) for demonstrating the procedure which demolishes the existing building by the demolition system which concerns on the said embodiment. It is FIG. (The 3) for demonstrating the procedure which demolishes the existing building by the demolition system which concerns on the said embodiment. It is FIG. (4) for demonstrating the procedure of demolishing the existing building by the demolishing system which concerns on the said embodiment. It is FIG. (5) for demonstrating the procedure which demolishes the existing building by the demolition system which concerns on the said embodiment. It is FIG. (6) for demonstrating the procedure which demolishes the existing building by the demolishing system which concerns on the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2 are a plan view and a longitudinal sectional view of an existing building 1 as an existing structure to which a dismantling system 2 according to an embodiment of the present invention is applied.
The existing building 1 is a building of n (n is a natural number) floor and has a square shape in plan view. Hereinafter, a direction along one side surface of the existing building 1 is defined as an X direction, and a direction substantially orthogonal to the X direction is defined as a Y direction.

The existing building 1 has a ramen structure, and includes a plurality of existing steel-framed columns 11, a plurality of steel-framed existing beams 12, a plurality of steel-framed existing beams 13 and a reinforced concrete existing floor 14. Prepare.
Further, gondola guides 16 extending in the vertical direction are formed on the outer wall surface 15 of the existing building 1 at predetermined intervals. The gondola guide 16 has a cylindrical shape with slits (see FIG. 7).
This existing building 1 is demolished using the following demolishing system 2.

3 and 4 are an enlarged plan view and an enlarged sectional view of the dismantling system 2. FIG.
The dismantling system 2 includes a crane installation floor 20 including a part of the existing floor 14 on the roof floor of the existing building 1, a support pillar 11 </ b> A that is an existing pillar 11 that supports the crane installation floor 20, and the crane installation floor 20. The crane 30 installed, the raising / lowering apparatus 40 which descends the crane installation floor 20 along the support pillar 11A, and the external scaffold 50 as a temporary scaffold constructed along the outer periphery of the existing building 1 are provided.

The crane installation floor 20 is a portion having a size of 2 spans × 2 spans in the central portion of the rooftop floor of the existing building 1.
Specifically, the crane installation floor 20 has an existing floor 14A having a size of 2 spans × 2 spans, an existing beam 12A that supports the existing floor 14A, and extends from the existing beam 12A to support the existing floor 14A. And an existing beam 13A.

  The support pillar 11 </ b> A is a part of the existing pillar 11 and supports the crane installation floor 20. Specifically, the support pillars 11 </ b> A are located at the four corners of the crane installation floor 20.

The crane 30 includes a base 31, a crane main body 32 supported by the base 31 so as to be pivotable, a jib 33 supported by the crane main body 32 so as to be raised and lowered, and a hook supported by being suspended from the tip of the jib 33. 34 and a hoisting device 35 provided on the crane main body 32 to raise and lower the hook 34 (see FIG. 1).
The entire existing building 1 is accommodated in the working radius of the crane 30 (indicated by the solid line P in FIG. 1).

On the crane installation floor 20, a pair of large-drawn members 21, which are H-shaped steels, are placed, and between these pair of large-drawn members 21, a pair of joists 22 are placed substantially orthogonal to them. Is placed.
Specifically, the pair of large pulling members 21 extend substantially parallel to each other along the X direction, and are installed between the existing beams 12A connecting the support columns 11A.

The pair of joists 22 extend substantially parallel to each other along the Y direction, and are laid between the pair of large draw members 21. The pair of joist members 22 can travel in the X direction along the pair of large pull members 21.
The base 31 of the crane 30 is installed on the pair of joists 22 and the base 31 of the crane 30 can travel along the joists 22 in the Y direction.

  In this way, the base 31 of the crane 30 can move in the Y direction along the joist member 22 and the pair of joist members 22 can travel in the X direction along the pair of large pull members 21. The crane 30 is movable on the crane installation floor 20 in the X direction and the Y direction.

  As shown in FIG. 4, the lifting device 40 is provided on the reaction force member 41 attached to the upper end of the support column 11 </ b> A, the suspension member 42 attached to the reaction force member 41, and the crane installation floor 20. A locking device 43 that locks to the support column 11 </ b> A and a lifting jack 44 that is provided on the locking device 43 and pulls the suspension member 42 are provided.

A through hole 23 is formed around the support column 11A (panel zone) of the existing floor 14A of the crane installation floor 20.
The locking device 43 is provided in the through hole 23 of the crane installation floor 20 and has a rectangular frame shape surrounding the support pillar 11A. The locking device 43 includes a loading beam 45 positioned on the upper side of the existing beam 12 </ b> A that contacts the support column 11 </ b> A, and a hollow beam 46 that is positioned on the lower side of the existing beam 12 </ b> A that contacts the supporting column 11 </ b> A and connected to the loading beam 45. And comprising.

  Thus, the locking device 43 is fixed to the crane installation floor 20 by sandwiching the existing beam 12A of the crane installation floor 20 between the loading beam 45 and the piercing beam 46.

  According to the lifting device 40 described above, the lifting jack 44 is driven and the suspension member 42 is pulled with a predetermined force, so that the crane installation floor 20 is supported by being suspended from the supporting column 11A. Can move up and down.

FIG. 5 is a front view of the external scaffold 50, and FIG. 6 is a side view of the external scaffold 50. 7 is a plan view of the external scaffold 50, and FIG. 8 is a cross-sectional view taken along the line AA of FIG. FIG. 9 is a partially enlarged side view of the external scaffold 50.
5 to 9, t (t is a natural number) rising is shown as a dismantling object.

The external scaffold 50 is locked to the upper floor 50A surrounding the rise of the t floor to be dismantled and the lower floors (t-1) and (t-2) which are lower floors of the upper section 50A. A lower portion 50B.
The external scaffold 50 is provided along the outer wall surface 15 of the existing building 1. The external scaffold 50 is obtained by connecting a plurality of scaffold units 51 in the horizontal direction.

  The scaffold unit 51 includes a frame scaffold 52 constructed with seven steps in the height direction and 3.5 spans in the horizontal direction, and horizontal reinforcing members 53A, 53B, and 53C made of square steel pipes provided in the frame scaffold 52 in the horizontal direction. A soundproof panel 54 provided over the entire surface of the frame scaffold 52, a reinforcing brace 55 provided at a predetermined position of the frame scaffold 52, and a telescope that is provided on the frame scaffold 52 and is locked to the existing building 1. A bracket 56, a moving wall joint 57 provided on the frame scaffold 52 to engage the gondola guide 16 of the existing building 1, a jack 58 provided on the frame scaffold 52 to press the outer wall 15 of the existing building 1, and a frame A gap closing stage 59 for closing between the scaffold 52 and the outer wall surface 15 of the existing building 1.

The scaffold unit 51 is supported from the existing building 1 by using a push-pull piece 60, a push-pull support 61, a secondary fall prevention wire 62, a height adjusting member 63, a lever block 64, and a support 65.
Among these, the push-pull pieces 60 are fixed with anchors at predetermined intervals along the outer peripheral portion of the existing floor 14 of each floor of the existing building 1.

  The frame scaffold 52 includes a plurality of building frames 70 arranged at predetermined intervals, a cloth plate 71 that connects upper ends of the building frame 70, and braces 72 that connect both side ends of the building frame 70. Prepare.

  As shown in FIG. 9, the building frame 70 includes a pair of cylindrical main pipes 701 extending in a substantially vertical direction, a cylindrical connection pipe 702 extending substantially horizontally and connecting the upper portions of the main pipes 701, and the main pipe 701. A truss is provided between the cylindrical secondary pipe 703 that extends in a substantially vertical direction and is connected to the connecting pipe 702, and one of the pair of main pipes 701 (existing building 1 side) and the secondary pipe 703. And a reinforcing tube 704 to be configured.

The cloth board 71 is a flat plate-like member and is installed between the connecting pipes 702 of the adjacent building frames 70.
The brace 72 is attached between main pipes 701 of adjacent building frames 70.
The reinforcing brace 55 is disposed below the frame scaffold 52 and connects the upper end of the outer main pipe 701 and the lower end of the sub pipe 703.

The horizontal reinforcing member 53 </ b> A is provided in two upper and lower stages above the frame scaffold 52. The push / pull support 61 connects the lower horizontal reinforcing member 53 </ b> A and the t-push push piece 60.
Further, the horizontal reinforcing member 53 </ b> B is provided at the center of the frame scaffold 52. The secondary fall prevention wire 62 connects the horizontal reinforcing member 53B and the lower flange of the existing outer beam 12 on the t floor.

As shown in FIG. 9, the telescopic bracket 56 is provided at the center and the lower part of the frame scaffold 52 in two upper and lower stages, a bracket 80 as a locking member, and a cylindrical storage portion 81 for storing the bracket 80. And comprising.
The bracket 80 can project and retract substantially horizontally toward the existing building 1. A through hole 801 is formed at the tip of the bracket 80.
The horizontal reinforcing member 53C is disposed on the upper surface on the inner end side of the storage portion 81, and the horizontal reinforcing member 53D is disposed on the lower surface on the outer end side of the storage portion 81. The storage portion 81 is fixed to the horizontal reinforcing members 53C and 53D.

As shown in FIG. 9, the height adjusting member 63 is an H-shaped steel, and is disposed along the outer periphery of the existing floor 14 on the (t−1) floor and the (t−2) floor. The bracket 80 of the telescopic bracket 56 protrudes into the existing building 1 and is placed on the height adjusting member 63 and is locked to the existing building 1. The hole 801 is connected by a lever block (registered trademark) 64. Further, a support 65 is built substantially vertically on the upper surface of the bracket 80, and this support 65 takes a reaction force on the upper surface of the bracket 80 and presses the lower surface of the existing beam 12 on the outer periphery of the upper floor. .

  The moving wall joint 57 is provided in two upper and lower stages at the central part and the lower part of the frame scaffold 52, extends substantially horizontally toward the inside and engages with the gondola guide 16. Therefore, the moving wall joint 57 can move up and down along the gondola guide 16 and the movement of the outer wall surface 15 in the out-of-plane direction is restricted.

The jacks 58 are jack bases provided on both sides of the moving wall connection 57 in the horizontal direction, and can protrude substantially horizontally toward the outer wall surface 15 of the existing building 1.
The jack 58 protrudes toward the outer wall surface 15 and presses the outer wall surface 15 of the existing building 1.

  The horizontal reinforcing member 53E is disposed on the upper surface on the inner end side of the moving wall joint 57 and the jack 58, and the horizontal reinforcing member 53F is disposed on the upper and lower surfaces on the outer end side of the moving wall joint 57 and the jack 58. The moving wall joint 57 and the jack 58 are fixed to the horizontal reinforcing members 53E and 53F.

The gap closing stage 59 is provided in the middle stage and the lower stage of the frame scaffold 52, and includes a stage member 591 rotatably attached to the building frame 70 of the frame scaffold 52, and the stage member 591 and the horizontal reinforcing member 53G. A chain 592 to be connected.
When the stage member 591 is opened to the outer wall surface 15 side, the stage member 591 is suspended and supported from the horizontal reinforcing member 53G by the chain 592 so that the level can be maintained.
A mesh sheet 541 is attached to the lower surface of the frame scaffold 52.

Hereinafter, the procedure for dismantling the existing building 1 will be described with reference to the flowchart of FIG.
In step S1, as shown in FIG. 11, the crane 30 is installed on the rooftop floor.
Specifically, first, an external scaffold 50 is installed around the existing building 1. Next, the existing penthouse 3 on the roof floor of the existing building 1 is dismantled, and the large-drawn material 21 and the joist 22 are placed on the existing floor 14 on the roof, and the crane is placed on the joist 22. 30 is installed.

In step S2, as shown in FIGS. 12 and 13, the lifting device 40 is attached to the rooftop floor. Specifically, the through-hole 23 is formed in the existing floor 14 around the existing pillar 11 that becomes the support pillar 11A, and the locking device 43 and the lifting jack 44 are attached thereto.
Further, a temporary column 47 having a predetermined height is installed immediately above the existing column 11 serving as the support column 11A, and a reaction force member 41 is mounted thereon, and the reaction force member 41 and the lifting jack 44 are connected to the suspension member 42. Connect with

In step S3, as shown in FIG. 13, the existing building 1 is disassembled from the roof floor for two layers, except for the crane installation floor 20 and the support pillar 11A.
Specifically, the dismantling machine 48 is lifted on the rooftop floor, and the dismantling material is unloaded by the crane 30 while disassembling it. At this time, the beam joint portion 18 protruding from the support pillar 11A on the n-th floor is left.
Further, the external scaffold 50 is slid downward as appropriate according to the progress of the dismantling work. This procedure will be described in detail later.

In step S4, the crane installation floor 20 is supported by the support pillar 11A.
Specifically, the existing beam 12A of the crane installation floor 20 that contacts the support column 11A is cut, and the edge between the crane installation floor 20 and the support column 11A is cut. As a result, the crane installation floor 20 is supported by being suspended from the support pillar 11 </ b> A via the lifting device 40.

  In step S5, as shown in FIG. 14, the crane installation floor 20 is lifted down. Specifically, the lifting jack 44 of the lifting device 40 is driven to lower the crane installation floor 20 along the support pillar 11A, and the locking device 43 is engaged with the beam joint portion 18 on the n-th floor of the support pillar 11A. Stop. Thereby, the crane installation floor 20 is supported by the n-th floor level of the support pillar 11A.

In step S6, as shown in FIG. 15, the reaction force member 41 is moved downward by one layer.
Specifically, the reaction force member 41 is lifted and removed by the crane 30, and then the upper portions of the temporary pillar 47 and the support pillar 11 </ b> A are cut and removed, and then the reaction force member 41 remains on the support pillar 11 </ b> A. Install on top.

In step S7, as shown in FIG. 16, the existing building 1 is decomposed into one layer except for the support pillar 11A. Specifically, the dismantled material is unloaded by the crane 30 while being dismantled by the dismantling machine 48. At this time, the beam joint portion 18 protruding from the support column 11A on the (n-1) floor is left.
Further, the external scaffold 50 is slid downward as appropriate according to the progress of the dismantling work. This procedure will be described in detail later.

In step S8, as shown in FIG. 16, the crane installation floor 20 is supported by the support pillar 11A. Specifically, the lifting jack 44 is driven, the crane installation floor 20 is slightly raised along the support pillar 11A, and the crane installation floor 20 is suspended and supported from the support pillar 11A. In this state, the locking of the locking device 43 with respect to the beam joint portion 18 is released.
In step S9, steps S5 to S8 are repeated.

Next, a procedure for sliding the external scaffold 50 downward will be described.
Specifically, the external scaffold 50 is divided into scaffold units 51, moved downward for each scaffold unit 51, and then the scaffold units 51 are connected again.

First, the scaffold unit 51 to be moved is disconnected from the adjacent scaffold unit 51, and the scaffold unit 51 to be moved is suspended and supported by the crane 30.
Next, the push / pull support 61, the secondary fall prevention wire 62, the lever block 64, and the support 65 are removed.

Next, the bracket 80 of the telescopic bracket 56 is retracted and stored in the storage portion 81, and the jack 58 is retracted and pulled away from the outer wall surface 15. In this state, the moving wall joint 57 is engaged with the gondola guide 16. Further, the stage member 591 of the gap closing stage 59 is closed.
Next, the scaffold unit 51 is moved downward while the moving wall joint 57 is moved along the gondola guide 16 by the crane 30.

Next, the bracket 80 of the telescopic bracket 56 is protruded into the existing building 1 and the jack 58 is protruded to press the outer wall surface 15. Further, the stage member 591 of the gap closing stage 59 is opened.
Next, the push / pull support 61, the secondary fall prevention wire 62, the height adjusting member 63, the lever block 64, and the support 65 are attached.
Next, the suspension support of the scaffold unit 51 by the crane 30 is released and connected to the adjacent scaffold unit 51.

According to this embodiment, there are the following effects.
(1) The dismantling space to be dismantled is surrounded by the upper part of the external scaffold 50, and the lower part of the external scaffold 50 is locked to the lower floor of the dismantling space so that the existing building 1 is supported. Therefore, even if the dismantling space is dismantled, the upper part of the external scaffold 50 surrounding the dismantling space can be reliably supported from the existing building.

  (2) Since the outer wall surface 15 of the existing building 1 is pressed by the jack 58, a tensile force acts on the moving wall joint 57. Thereby, since the space | interval of the external scaffold 50 and the outer wall surface 15 of the existing building 1 can be hold | maintained, the attitude | position of this external scaffold 50 can be maintained stably also under a strong wind.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

  Moreover, in this embodiment, in step S3, the existing building 1 was disassembled from the rooftop for two layers, and in step S4, the crane installation floor 20 was supported by the support pillar 11A, but this is not restrictive. For example, in step S3, one layer of the existing building 1 may be disassembled from the roof floor, the crane installation floor 20 may be supported by the support pillar 11A in step S4, and the existing building 1 may be disassembled by one layer. Alternatively, in step S3, the crane installation floor 20 may be supported by the support pillar 11A, and in step S4, the existing building 1 may be dismantled from the roof floor for two layers.

DESCRIPTION OF SYMBOLS 1 ... Existing building (existing structure), 2 ... Demolition system, 3 ... Penthouse 11 ... Existing column, 11A ... Supporting column 12, 12A ... Existing beam 13, 13A ... Existing beam 14, 14A ... Existing floor 15 ... Outer wall surface , 16 ... Gondola guide, 18 ... Beam joint,
DESCRIPTION OF SYMBOLS 20 ... Crane installation floor, 21 ... Large drawing material, 22 ... joist material, 23 ... Through-hole 30 ... Crane, 31 ... Base, 32 ... Crane body 33 ... Jib, 34 ... Hook, 35 ... Hoisting device 40 ... Lifting device , 41 ... Reaction member, 42 ... Suspension material 43 ... Locking device, 44 ... Elevating jack, 45 ... Loading beam 46 ... Cantilever beam, 47 ... Temporary pillar, 48 ... Weight-removing machine 50 ... External scaffolding (temporary scaffolding), 50A ... Upper part, 50B ... Lower part 51 ... Scaffolding unit, 52 ... Framed scaffolding 53A, 53B, 53C, 53D, 53E, 53F, 53G ... Horizontal reinforcement member 54 ... Soundproof panel, 55 ... Reinforcement brace, 56 ... Telescopic bracket 57 ... Moving wall 58, jack (pressing member), 59, stage 60, push-pull piece, 61, push-pull support, 62, secondary fall prevention wire 63, height adjusting member, 64, lever Lock, 65 ... Support 70 ... Building frame, 71 ... Fabric board, 72 ... Brace 80 ... Bracket (locking member), 81 ... Storage section 541 ... Mesh sheet 591 ... Receiving metal, 592 ... Stage member, 593 ... Chain 701 ... Main pipe, 702 ... Connecting pipe 703 ... Sub pipe, 704 ... Reinforcement pipe 801 ... Through hole

Claims (2)

A dismantling system for dismantling existing structures,
A crane installation floor including a part of the existing floor in a predetermined floor of the existing structure;
A supporting column that is an existing column that supports the crane installation floor;
A crane installed on the crane installation floor;
A lifting device for lowering the crane installation floor along the support pillar;
A temporary scaffold provided along the outer periphery of the existing structure,
The temporary scaffold includes an upper part surrounding a dismantling target of the existing structure, and a lower part provided below the upper part and positioned on a lower floor of the dismantling target,
The outer wall surface of the existing structure is provided with a gondola guide extending substantially vertically,
At the bottom of the temporary scaffold, a locking member that protrudes and sinks toward the existing structure and engages with the existing structure, a movable wall that engages with the gondola guide and is movable along the gondola guide A dismantling system comprising a connecting member and a pressing member that is disposed on both sides of the moving wall connecting member in a horizontal direction and presses an outer wall surface of the existing structure . A dismantling method for dismantling an existing structure using the dismantling system according to claim 1 ,
The crane installation floor includes a part of the existing floor in a predetermined floor of the existing structure, the existing pillar supporting the crane installation floor is used as a support pillar, the crane is installed on the crane installation floor, and the lifting device and A first step of attaching the temporary scaffold;
Using the crane, a second step of disassembling a portion of the predetermined floor excluding the crane installation floor and the support pillar;
Driving the lifting device, lowering the crane installation floor along the support pillar, removing the upper part of the support pillar, releasing the locking by the locking member of the temporary scaffold, A third step of moving downward, and again locking the locking member of the temporary scaffold to the existing structure;
A disassembly method comprising: a fourth step of repeating the second step and the third step.

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