JP6132349B2 - Structure reconstruction method - Google Patents

Description

  The present invention relates to a structure reconstruction method. Specifically, the present invention relates to a structure reconstructing method for remodeling an existing structure.

Conventionally, in a high-rise building, there is a case where a building is dismantled and a new building is constructed due to the aging of facilities and structures.
As a method of demolishing a building, for example, a temporary roof made of a hat truss is provided on the top floor, and a space surrounded by the temporary roof is used as a dismantling work space. And methods for preventing noise have been proposed.

Japanese Patent No. 3218519

However, the conventional method has a problem that the construction period is prolonged and the cost is increased because a new building is constructed after the dismantling of the existing building is completed.
Moreover, in order to completely dismantle existing buildings, there was a problem that a huge amount of dismantling material was generated and a large load was placed on the environment.

  It is an object of the present invention to provide a structure reconstructing method that can reduce the cost of remodeling while reducing the load on the environment.

The structure reconstructing method according to claim 1 is a structure reconstructing method for reconstructing an existing structure (for example, an existing building 1 described later), and a floor slab (for example, described later) on a predetermined floor of the existing structure. The m-floor existing floor slab 13) is used as a moving floor (for example, a moving floor 21 described later), and a temporary wall (for example, the outer floor of the existing structure above and below the moving floor supported by the moving floor (for example, In an initial step (for example, steps S1 to S3 to be described later) for laying a lower temporary wall 23 and an upper temporary wall 24, which will be described later, and at least a part of the space surrounded by the temporary wall on the lower side of the moving floor The existing pillar (for example, the later-described existing pillar 11A) is used as a reuse structure (for example, the later-described reuse structure 41), the existing structure is dismantled except for the reuse structure, and the moving bed In the space surrounded by the temporary wall above New structures contain body (e.g., new buildings 2 below) renovation constructing a (e.g., step S4 will be described later) and, alternating with the renovation process and the moving of the lower of the moving bed and the temporary wall A repeating process (for example, steps S5 and S6 described later).

The structure remodeling method of the present invention is a structure remodeling method for remodeling an existing structure, including a floor slab of a predetermined floor of the existing structure as a moving floor, and the work space is partitioned vertically by the moving floor. Then, in the lower work space (for example, a dismantling work space 40 described later), the existing work structure is disassembled leaving at least a part of the existing pillars, and the upper work space (for example, a new work space 50 described later). Then, it is preferable to construct a new structure (for example, a new building 2 described later) using the remaining existing pillar.

According to this invention, it is set as a movable floor including the floor slab of the predetermined floor of the existing building. The moving floor divides the work space into two upper and lower work spaces, that is, a work space above the moving floor and a work space surrounded by a temporary wall below the moving floor.
Next, in the work space surrounded by the temporary wall on the lower side of the moving floor, at least a part of the existing pillars are left and dismantled, and in the work space on the upper side of the moving floor, the existing existing pillars are included and newly constructed. Build a structure. Then, the dismantling work of the existing building and the construction work of the new structure are repeated while moving the moving floor and the temporary wall together.

In this way, the work space is divided up and down by the moving floor, and in the lower space surrounded by one work space, that is, the temporary wall, the existing structure is dismantled and surrounded by the other work space, that is, the temporary wall. In the upper space, a new structure will be newly constructed. Therefore, the dismantling work of the existing structure and the construction work of the new structure can be performed simultaneously in different work areas, and work efficiency can be improved. In addition, the safety of the worker can be ensured, and the flying and dropping of materials and tools can be reliably prevented.
Also, at the layer (floor) where the construction work for the new structure is performed, the dismantling work for the existing structure has already been completed, so that the dismantling material for the existing structure comes into contact with the new structure and the new structure is damaged. There is nothing.

In addition, since the new structure is constructed while dismantling the existing structure, it can be reconstructed in a shorter period of time compared to the case where the new structure is constructed after the dismantling of the existing structure is completed as in the past. Cost can be reduced.
In addition, because the demolition work area is surrounded by a moving floor and temporary walls, dust can be prevented from scattering around the existing structure when it is demolished, noise can be reduced, and demolishing material can be prevented from falling. it can. Thus, the load on the surrounding environment can be reduced.

In addition, since a new structure is constructed by reusing a part of the existing structure, the amount of dismantling material can be reduced, and the load on the environment can be reduced.
In addition, when dismantling or newly constructing a high-rise part of a structure, if a tower crane or a jib crane is used, the work efficiency is reduced due to the influence of the wind, but it is not affected by the wind due to the temporary wall, so that the work can be performed efficiently.

  According to the present invention, the work space is divided up and down by the moving floor, and in the lower space surrounded by one work space, that is, the temporary wall, the existing structure is dismantled while the other work space, that is, the temporary wall, is disassembled. In the enclosed upper space, a new structure is newly constructed. Therefore, the dismantling work of the existing structure and the construction work of the new structure can be performed simultaneously in different work areas, and work efficiency can be improved. In addition, the safety of the worker can be ensured, and the flying and dropping of materials and tools can be reliably prevented. Also, at the layer (floor) where the construction work for the new structure is performed, the dismantling work for the existing structure has already been completed, so that the dismantling material for the existing structure comes into contact with the new structure and the new structure is damaged. There is nothing. In addition, since the new structure is constructed while dismantling the existing structure, it can be reconstructed in a shorter period of time compared to the case where the new structure is constructed after the dismantling of the existing structure is completed as in the past. Cost can be reduced. In addition, because the demolition work area is surrounded by a moving floor and temporary walls, dust can be prevented from scattering around the existing structure when it is demolished, noise can be reduced, and demolishing material can be prevented from falling. it can. Thus, the load on the surrounding environment can be reduced. In addition, since a new structure is constructed by reusing a part of the existing structure, the amount of dismantling material can be reduced, and the load on the environment can be reduced. In addition, when dismantling or newly constructing a high-rise part of an existing structure, if a tower crane or a jib crane is used, the work efficiency is reduced due to the influence of the wind, but it is not affected by the wind due to the temporary wall, so that the work can be performed efficiently.

It is sectional drawing of the existing structure to which the structure reconstruction method which concerns on one Embodiment of this invention is applied. It is a flowchart of the procedure which rebuilds an existing structure by the structure rebuilding method which concerns on the said embodiment. It is FIG. (1) for demonstrating the procedure which rebuilds an existing structure by the structure rebuilding method which concerns on the said embodiment. It is a top view of the rooftop floor of the existing structure to which the structure reconstruction method which concerns on the said embodiment is applied. It is a top view of the movable floor of the structure reconstruction method which concerns on the said embodiment. It is sectional drawing of the movable floor and temporary wall of the structure reconstruction method which concerns on the said embodiment. It is FIG. (2) for demonstrating the procedure which rebuilds an existing structure by the structure rebuilding method which concerns on the said embodiment. It is FIG. (3) for demonstrating the procedure which rebuilds an existing structure by the structure rebuilding method which concerns on the said embodiment. It is FIG. (4) for demonstrating the procedure which rebuilds an existing structure by the structure rebuilding method which concerns on the said embodiment. It is sectional drawing of the movable floor and temporary wall of the structure reconstruction method which concerns on the modification of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of an existing building 1 as an existing structure to which a structure reconstructing method according to an embodiment of the present invention is applied.
The existing building 1 is a high-rise building with m (m is a natural number) floors. This existing building 1 includes a plurality of existing columns 11 and a plurality of existing beams 12 that connect these existing columns 11 as a framework, that is, a structure. Moreover, this existing building 1 is provided with the existing floor slab 13, the existing outer wall 14, the existing partition wall 15, etc. as a non-structural body.

  The structure reconstruction method of the present invention is to reconstruct the existing building 1. Specifically, only a part of the existing pillars 11A of the existing building 1 are left and dismantled, and a new building 2 is constructed as a new structure using these part of the existing pillars 11A (see FIG. 8, see FIG.

  Hereinafter, the procedure for renovating the existing building 1 will be described with reference to the flowchart of FIG.

In step S1, the outer periphery scaffolding 20 is constructed as shown in FIG.
The outer periphery scaffold 20 is provided to project outward from the existing beam 12 and the existing floor slab 13 on the m floor of the existing building 1 and has a rectangular frame-like extension portion 22 surrounding the existing building 1, and the extension portion. A lower temporary wall 23 provided below the existing building 1 and covering the outer peripheral surface of the existing building 1, and an upper temporary wall 24 provided above the extending portion 22 and covering the outer peripheral surface of the existing building 1.

  The lower temporary wall 23 has a height corresponding to two layers of the existing building 1 and is configured by stacking, for example, six stages of frame scaffolds. Specifically, the lower temporary wall 23 is constructed by stacking downward from the lower surface of the extending portion 22 while suspending and supporting the frame scaffold.

  The upper temporary wall 24 has a height corresponding to one layer of the existing building 1 and is configured by stacking, for example, three stages of frame scaffolds. Specifically, the upper temporary wall 24 is constructed by laminating a frame scaffold on the extending portion 22 upward.

The outer peripheral surface of the lower temporary wall 23 is covered with a soundproof panel 25. However, the present invention is not limited thereto, and the outer peripheral surface of the lower temporary wall 23 may be covered with a mesh sheet.
The outer peripheral surface of the upper temporary wall 24 is covered with a mesh sheet 26. However, the present invention is not limited thereto, and the outer peripheral surface of the upper temporary wall 24 may be covered with a soundproof panel.

FIG. 4 is a plan view of the rooftop floor of the existing building 1.
As shown in FIGS. 3 and 4, the outer peripheral scaffold 20 is suspended and supported by a support device 30 provided on the top of some existing pillars 11 </ b> A of the existing building 1.
Here, the existing building 1 is a building having three spans in the longitudinal direction and two spans in the short direction in plan view, and the support device 30 includes four existing pillars 11 </ b> A located at the four corners of the existing building 1, Are provided on two existing pillars 11A.

  Specifically, these supporting devices 30 are used to suspend and support the existing floor slab 13 of the m-th floor (that is, a movable floor 21 described later) or the outer edge of the extending portion 22 of the outer periphery scaffold 20. These support devices 30 are provided at the top of the existing pillar 11A and project outward, a hydraulic jack 32 provided at the tip of the support 31, and a hydraulic jack 32 supported by the hydraulic jack 32 so as to be movable up and down. The m floor existing floor slab 13 (that is, a movable floor 21 described later) or a suspension member 33 connected to the outer periphery scaffold 20 is provided.

In step S2, the moving floor 21 is constructed as shown in FIG.
FIG. 5 is a plan view of the moving floor 21. In FIG. 5, the moving floor 21 is indicated by diagonal lines.
That is, the existing beam 12 and the existing floor slab 13 of the m floor of the existing building 1 are used as the moving floor 21, and the existing beam 12 and the existing floor slab constituting the moving floor are cut by cutting along the outer peripheral surface of the existing column 11A. 13 is cut off from the existing pillar 11A.

  As a result, as shown in FIG. 6, the outer periphery scaffold 20 and the movable floor 21 are integrated and can be moved up and down by the support device 30. In FIG. 6, the outer periphery scaffold 20 and the movable floor 21 are indicated by hatching.

Hereinafter, a space surrounded by the movable floor 21 and the upper temporary wall 24 is referred to as a new work space 50. Then, the new work space 50 is located on the m floor.
A space surrounded by the movable floor 21 and the lower temporary wall 23 is defined as a dismantling work space 40. Then, the dismantling work space 40 is located on the (m-1) floor and the (m-2) floor.

In step S3, as shown in FIG. 7, the existing building 1 is dismantled except for some structures in the new work space 50.
Specifically, first, the existing pillar 11 </ b> A of the existing building 1 is a reuse structure 41. Then, the parts excluding the movable floor 21 and the reuse structure 41, that is, the existing floor slab 13, the existing beam 12, the existing outer wall 14, the existing partition wall 15, an existing facility device (not shown), and the like are dismantled.

  In the dismantling work, a carry-out port (not shown) is provided inside or on the outer periphery of the existing building 1, and a dismantling material is moved to the carry-out port using a traveling crane or the like, and conveyed from the carry-out port to the lower floor. . The demolished material transported to the lower floor is separated from recyclable materials and industrial waste, and is taken out of the venue.

In step S4, as shown in FIG. 8, in the dismantling work space 40, dismantling is performed except for the reuse structure 41 of the existing building 1, that is, the existing pillar 11A, as in step S3.
In step S4, the new building 2 is constructed using the reuse structure 41 in the new work space 50, as shown in FIG. Specifically, a new beam 51, a new floor slab 52, a new outer wall 53, and new equipment (not shown) are installed in the new work space 50.

In step S5, as shown in FIG. 9, the outer periphery scaffold 20 and the movable floor 21 are moved downward by one layer. At this time, the outer periphery scaffold 20 and the movable floor 21 are moved downward by driving the hydraulic jack 32 of the support device 30 and lowering the suspension member 33.
Accordingly, the new work space 50 is located on the (m−1) floor, and the dismantling work space 40 is located on the (m−2) floor and the (m−3) floor.

  In step S6, steps S4 and S5 are repeated as one set, and the reconstruction work is performed from the upper floor to the lower floor.

According to this embodiment, there are the following effects.
(1) The work space is partitioned up and down by the moving floor 21, and in the lower space surrounded by the lower temporary wall 23, that is, in the dismantling work space 40, the upper temporary wall 24 is dismantled while leaving the existing pillars 11 apart. A new beam 51, a new floor slab 52, and a new outer wall 53 are newly attached in the upper space surrounded by, that is, in the new work space 50. Therefore, the dismantling work of the existing building 1 and the construction work of the new building 2 can be performed simultaneously in different work areas, and work efficiency can be improved. In addition, the safety of the worker can be ensured, and the flying and dropping of materials and tools can be reliably prevented.
Further, in the layer (floor) where the construction work of the new building 2 is performed, the dismantling work of the existing building 1 has already been completed, so that the dismantling material of the existing building 1 comes into contact with the new building 2 and the new building 2 is damaged. There is nothing.

In addition, since the new building 2 is constructed while dismantling the existing building 1, it can be renovated in a shorter period of time compared to the case where the new building is constructed after the dismantling of the existing building is completed as before, and the renovation is required. Cost can be reduced.
Since the demolition work area is surrounded by the moving floor 21 and the lower temporary wall 23, when the existing building 1 is demolished, dust can be prevented from scattering to the surroundings, noise can be reduced, and the demolition material can be dropped. Can also be prevented. Thus, the load on the surrounding environment can be reduced.

Moreover, since the new building 2 was constructed by reusing the existing pillar 11 that is a part of the existing building 1, the amount of dismantling material can be reduced, and the load on the environment can be reduced.
In addition, when dismantling or newly constructing a high-rise building, if a tower crane or jib crane is used, work efficiency is reduced due to the effect of wind, but the lower temporary wall 23 and upper temporary wall 24 are not affected by the wind. , Work efficiently.

(2) Since the lower temporary wall 23 is configured by stacking frame scaffolds, the depth of the lower temporary wall 23 from the extended portion 22 (that is, from the extended portion 22 to the lower end of the lower temporary wall 23). The disassembly work space 40 can be set to an arbitrary size by appropriately adjusting the distance.
Further, since the upper temporary wall 24 is configured by laminating frame scaffolds, the height of the upper temporary wall 24 from the extending portion 22 can be appropriately adjusted to set the new work space 50 to an arbitrary size.
Further, the height (depth) of the temporary walls 23 and 24 can be freely adjusted later by further stacking the frame scaffolds or removing some of the frame scaffolds.

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.
Further, in the present embodiment, the lower temporary wall 23 is configured by stacking six stages of frame scaffolds, and the upper temporary wall 24 is configured by stacking three stages of frame scaffolds. The number of stages may be set as appropriate.

  In the present embodiment, some existing pillars 11A, that is, four existing pillars 11A located at the four corners of the existing building 1 and two existing pillars 11A located inside are dismantled. Not limited to this. For example, all the existing pillars may be left and disassembled, and the positions and number of the existing pillars to be left may be appropriately determined based on the weight of the outer periphery scaffold 20 borne through the support device 30.

  Moreover, in this embodiment, although the movable floor 21 was comprised with the existing beam 12 and the existing floor slab 13 of 1 layer, ie, m floor, it is not restricted to this. For example, the moving floor 21 may be composed of two layers. Specifically, in addition to the existing beam 12 on the m-th floor, the existing floor slab 13 on the m-th floor, the existing beam 12 on the (m−1) -th floor, and the existing floor slab 13 on the (m−1) -th floor shown in FIG. And you may comprise with the existing pillar 11 of the (m-1) floor which is not illustrated in FIG.

  In this embodiment, only the existing pillar 11A is reused as the reuse structure 41. However, the present invention is not limited to this, and the existing outer wall 14 and the existing partition wall 15 are reused as the reuse structure 41 in addition to the existing pillar 11. May be used.

1 ... Existing building (existing structure)
2 ... New building (new structure)
DESCRIPTION OF SYMBOLS 11, 11A ... Existing pillar 12 ... Existing beam 13 ... Existing floor slab 14 ... Existing outer wall 15 ... Existing partition wall 20 ... Peripheral scaffold 21 ... Moving floor 22 ... Extension part 23 ... Lower temporary wall 24 ... Upper temporary wall 25 ... Soundproof panel 26 ... Mesh sheet 30 ... Support device 31 ... Support part 32 ... Hydraulic jack 33 ... Suspension material 40 ... Dismantling work space 41 ... Reuse structure 50 ... New work space 51 ... New beam 52 ... New floor slab 53 ... New outer wall

Claims (1)

A method for reconstructing a structure that remodels an existing structure,
An initial step of constructing a moving floor including a floor slab of a predetermined floor of the existing structure and constructing a temporary wall supported by the moving floor and covering the outer peripheral surface of the existing structure above and below the moving floor;
In the space surrounded by the temporary wall under the moving floor, at least a part of the existing pillars is used as a reuse structure, and the existing structure is dismantled except for the reuse structure, and the moving floor In a space surrounded by the upper temporary wall, a remodeling process for constructing a new structure including the reuse structure;
Structure renovation method characterized by and a repeating step of repeating alternating movement and said renovation process below said moving bed and the temporary wall.

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