JP5694468B2 - Disassembly method using girder support device and girder support device - Google Patents

Description

  The present invention uses a girder-type support device that dismantles a building while dispersing the weight of the excavator machine with a girder-type support device that spans the beam when demolishing a concrete building using a shovel machine The dismantling method and the girder support device.

  For the demolition work of buildings such as RC structures and SRC structures, a rooftop demolition method is generally performed in which an excavator machine is lifted by a crane on the roof and the dismantling work from the upper floor to the lower floor is performed. At this time, if the weight of the excavator used for the dismantling construction is applied to the slabs or the like of each floor, the strength of the slabs may not be able to endure and may fall off. For this reason, work is being done to dismantle the slabs on each floor with support reinforcement from below so that the slabs do not fall out of the load of the excavator machine.

  In this dismantling work, iron plates are laid out so that the slabs will not fall out, and support devices and reinforcing posts are installed between the slabs on the lower floors and the slabs on the upper floors. To unload. However, in this method, since a large amount of support is installed between the slabs on each floor, there is an inconvenience that the construction period and the cost burden increase. In addition, if the arrangement positions of the support device and the reinforcing posts are not accurate, there is a possibility that the support device may be loosened or detached due to vibrations or the like generated during the operation of the shovel machine.

  Patent Document 1 proposes a girder-type support device that disperses the weight of the excavator for dismantling on the beam instead of using such a support device. According to this girder-type support device, a girder-type support device using H-shaped steel is bridged on a beam that is relatively stronger than the slab, and the excavator is placed on this girder-type support device while moving and dismantling work It is comprised so that it may perform.

JP 2002-371713 A

  However, all of the dismantling work using conventional support devices and girder-type support devices is to lift the excavator machine with a crane on the roof and perform the dismantling work from the upper layer to the lower layer. There was an inconvenience that dismantling work could not be performed when there was no installation space for the crane to lift the machine.

  In addition, the conventional girder type support device uses one side of the H-shaped steel web as a mounting surface, welds the reinforcing device to both ends of the web, and tightens the reinforcing device with long bolts connecting the reinforcing device. Tension was generated in the web to increase the support strength of the girder support device.

  Although it was possible to increase the strength of the girder frame by this tension, the strength of the longitudinal center portion of the girder frame was lower than the strength of both longitudinal end portions, and the strength varied depending on the position. For this reason, when the shovel machine is mounted on the girder frame, there is a safety problem that the girder frame may bend from the longitudinal center portion and the reinforcing device may come off.

  Therefore, the present invention was created to solve the above-mentioned problems, and even when there is no space for using a crane around the building, it can be dismantled from the rooftop, and even if an excavator is mounted, it is a girder type An object of the present invention is to provide a disassembly method using a girder-type support device and a girder-type support device that can be safely constructed with little deformation in the support device.

In order to achieve the above-mentioned object, the first means in the present invention is to move the excavator machine S on the girder-type support device on which the excavator machine S for the dismantling work is placed on the beam P of the building. In the dismantling method using the girder support device 100 that performs dismantling work while
A locking part 11 and an inclined plate 12 are provided at one end of the girder support device 100 to be locked on the beam P on the upper floor. The inclined plate 12 increases the strength of the locking part 11 and the inclined plate 12. The excavator S is configured to move to the upper floor from
Forming a moving opening R for moving the shovel machine S from the lower surface of the slab Q on the upper floor with the shovel machine S arranged on the slab Q on the lower floor;
A step in which the girder support device 100 is obliquely bridged from the lower floor to the position of the beam P of the moving opening R on the upper floor, and the excavator S moves from the moving opening R to the upper floor through the girder support device 100; ,
And a step of moving freely through the girder-type support device 100 spanned between the beams P of the slab Q on the upper floor, and a dismantling method for moving the excavator S to the rooftop.

The second means is used in the dismantling method that is carried over the beam P of the building and dismantling while moving the excavator machine S on the girder support device on which the excavator machine S for dismantling work is placed. In the girder-type support device 100,
While the web side of the H-shaped steel is used as a mounting surface , the locking part 11 that is locked to the upper surface of the beam P on the upper floor at the flange end of the H-shaped steel, and the strength of the locking part 11 are increased, A girder frame 10 including an inclined plate 12 formed so that the excavator S moves on the upper floor ;
Auxiliary frame 20 made of H-shaped steel fixed to the back side of the longitudinal center portion of the girder frame 10 along the longitudinal direction;
A tie rod rod 30 that passes through a pair of fixed flat bars 31 fixed to both longitudinal ends of the auxiliary frame 20 and is fixed by a fixing nut 32;
The girder-type support device is configured to tighten the tie rod rod 30 to generate tension in the girder frame 10 and the auxiliary frame 20.

  In the third means, the tie rod rod 30 is a girder type support device in which the tie rod rod 30 is disposed between the auxiliary frames 20, and a reinforcing plate 40 covering the entire lower surface of the auxiliary frame 20 is fixed to the auxiliary frame 20.

According to claim 1 of the present invention, dismantling work is performed from the roof even when there is no space to use a crane around the building by the dismantling method of performing the dismantling work with the excavator S moved to the roof in the upper floor moving process. It can be performed. In addition, since the locking portion 11 to be locked to the upper surface of the beam P on the upper floor and the inclined plate 12 formed to increase the strength of the locking portion 11 and to move the shovel machine S to the upper floor are formed. Since the girder frame 10 can be reliably locked on the beam P of the slab Q, the excavator machine S can be moved safely.

  The tie rod rod 30 is tightened as described in claim 2 so that tension is generated in the girder frame 10 and the auxiliary frame 20, so that the girder support device can be safely constructed with little deformation even when an excavator is mounted. Succeeded in providing.

  As in claim 3, the tie rod bars 30 are disposed between each other along the longitudinal direction of the auxiliary frame 20, and the reinforcing plate 40 is fixed so as to cover each lower surface of the auxiliary frame 20. The rod 30 does not have to be exposed, and the tie rod rod 30 can be prevented from being broken or dropped even when used for rough work such as dismantling work.

In the method of this invention, it is a schematic side view which shows the process in which an excavator machine moves to an upper floor. In the method of this invention, it is a schematic plan view which shows the state which an excavator machine moves on a slab. In the method of this invention, it is the schematic which shows the path | route which an excavator machine moves to a rooftop. It is a disassembled perspective view which shows one Example of this invention apparatus. It is a partially notched side view which shows one Example of this invention apparatus. It is a bottom view which shows one Example of this invention apparatus. It is principal part side sectional drawing which shows the tie rod rod and reinforcement plate of this invention apparatus. It is a cross-sectional view which shows the auxiliary | assistant flame | frame and tie rod rod of this invention apparatus. It is principal part side sectional drawing which shows the engagement protrusion and inclined board of this invention apparatus. It is principal part side sectional drawing which shows the reinforcement board of this invention apparatus. It is a schematic front view which shows the state which mounted the shovel machine in the girder frame of this invention apparatus.

  According to the present invention, even if there is no space for using a crane around the building, dismantling work can be performed from the roof, and even if an excavator is mounted, the girder-type support device is less deformed and can be safely constructed. The initial objectives such as were achieved.

  Examples of the present invention will be described below. The disassembly method of the present invention is a disassembly method using the girder support device 100 (see FIGS. 1 to 3). The basic structure of the girder support device 100 is such that one side of the H-shaped steel web is used as a mounting surface. The girder support device 100 is bridged between the beams P of the building. Is a dismantling method in which the excavator machine S is placed and moved while being disassembled (see FIG. 2).

  In the conventional dismantling method using the girder support device, the excavator S and the girder support device are transported to the roof by a crane. However, in the present invention, the conventional dismantling method is improved and the excavator S is installed on the roof. So that you can move on your own.

  That is, the excavator S is disposed on the lowermost slab Q (see FIG. 1). In this case, the entrance (not shown) of the excavator machine S is opened by the excavator machine S, and the excavator machine S moves on the slab Q by itself. And the moving opening R for excavator machine S movement is formed in the slab Q of the upper floor with the moved shovel machine S (refer FIG. 3).

  The moving opening R opens to a size that allows the excavator machine S to move, and the girder support device 100 is bridged obliquely from the lower floor to the upper surface of the moving opening R (see FIG. 1). At this time, the girder support device 100 is bridged to the position of the beam P having a relatively high strength even in the slab Q.

  Next, the excavator S is moved from the moving opening R to the upper floor across the girder support device 100 (see FIG. 1). Thus, the shovel machine S that has reached the slab Q on the upper floor can freely move along the girder support device 100 spanned between the beams P (see FIG. 2).

  And the excavator S can be finally moved to the rooftop by repeating the process of opening the moving opening R from the lower floor to the slab Q of the upper floor and moving the excavator S (see FIG. 3). . After this, the dismantling work is proceeded sequentially by the conventional rooftop dismantling method.

  Next, the basic configuration of the girder-type support device 100 used in the present invention includes a girder frame 10, an auxiliary frame 20, a tie rod rod 30, and a reinforcing plate 40 (see FIGS. 4 to 10).

  The girder frame 10 uses H-shaped steel, and a web surface of the H-shaped steel is used as a mounting surface, and the shovel machine S is mounted on the girder frame 10 spanned on the beam P ( FIG. 11). A large number of steel bars 14 are welded to the mounting surface to ensure the movement of the shovel machine S (see FIG. 4). However, since only the H-shaped steel has insufficient strength to support the shovel machine S, the support strength of the girder frame 10 is increased by the auxiliary frame 20, the tie rod rod 30 and the reinforcing plate 40.

  The auxiliary frame 20 uses a plurality of H-beams. The auxiliary frame 20 is fixed along the longitudinal direction on the back side of the longitudinal center portion of the girder frame 10 (see FIG. 6). In the illustrated example, three auxiliary frames 20 are welded to the girder frame 10.

  On the other hand, the tie rod rod 30 is a member that generates tension in the beam frame 10 and the auxiliary frame 20. That is, the fixed flat bar 31 is fixed to both longitudinal ends of the auxiliary frame 20 (see FIG. 6). Then, the tie rod rod 30 is passed through the fixed flat bar 31 and fixed with a fixing nut 32 (see FIG. 5).

  As the fixing nut 32 is tightened, the tie rod rod 30 is tightened between the fixed flat bars 31, and this tightening force applies tension to the girder frame 10 and the auxiliary frame 20. Two tie rod rods 30 shown in the figure are arranged between the auxiliary frames 20 (see FIG. 8). However, the number and length of the auxiliary frames 20 and the tie rod rods 30 are not limited to the illustrated examples.

  The reinforcing plate 40 is a steel plate fixed so as to cover each lower surface of the auxiliary frame 20 (see FIG. 6). Guide plates 41 are provided at both ends of the reinforcing plate 40, and the above-described tie rod rods 30 are inserted and supported. By fixing the reinforcing plate 40 to the auxiliary frame 20, the auxiliary frame 20 and the tie rod rod 30 can be integrated with the beam frame 10 (see FIGS. 7 and 8).

  In order to lock the girder frame 10 to the moving opening R opened in the slab Q on the upper floor, a locking portion 11 is provided at one end of the girder frame 10 (see FIG. 9). This locking portion 11 is a portion formed at the flange end portion of the H-shaped steel constituting the girder frame 10 and is formed in a notch shape. The slab Q is locked on the high-strength beam P. The locking portion 11 is increased in strength by the inclined plate 12, and the excavator S moves from the inclined plate 12 to the upper floor.

  On the other hand, a reinforcing plate 13 is provided at the other end of the girder frame 10 (see FIG. 10). This reinforcement board 13 reinforces the edge part of the girder frame 10 installed in the slab Q of a lower floor.

  Note that the configurations of the girder frame 10, the auxiliary frame 20, the tie rod rod 30, the reinforcing plate 40, and the like are not limited to the illustrated examples, and may be changed to other shapes unless the configuration changes the gist of the present invention. Is possible.

P Beam Q Slab R Moving opening S Excavator 10 Girder frame 11 Locking portion 12 Inclined plate 13 Reinforcement plate 14 Steel bar 20 Auxiliary frame 30 Tie rod rod 31 Fixed flat bar 32 Fixed nut 40 Reinforcement plate 41 Guide plate

Claims (3)

In the dismantling method using the girder support device that crosses over the beam of the building and places the excavator machine on the girder support device on which the excavator machine for demolition work is placed and moves,
The girder-type support device is provided with a locking portion and an inclined plate that are locked on the upper floor beam at one end of the girder support device, and the inclined plate increases the strength of the locking portion, and an excavator machine from the inclined plate to the upper floor. Configured to move ,
Forming a moving opening for excavator machine movement from the lower surface of the slab on the upper floor with an excavator machine arranged on the lower floor slab;
A process in which the excavator machine crosses the girder-type support device obliquely over the beam-type support device from the lower-level floor to the beam position of the upper-level moving opening, and moves from the moving opening to the upper-level floor;
Dismantling method using a girder-type support device, comprising: a step of freely moving along a girder-type support device bridged between beams of slabs on an upper floor, wherein the excavator is moved to the rooftop . In the girder-type support device used for the demolition method of carrying out the demolition work while moving the excavator machine on the girder-type support device that crosses over the beams of the building and places the excavator machine for demolition work,
One side of the H-shaped steel web is used as a mounting surface, and a locking portion that is locked to the upper surface of the beam on the upper floor at the flange end of the H-shaped steel; A girder frame with an inclined plate formed to move the excavator ,
An auxiliary frame of H-shaped steel fixed to the back side of the longitudinal central portion of the girder frame along the longitudinal direction;
A tie rod rod that penetrates a pair of fixed flat bars fixed to both longitudinal ends of the auxiliary frame and is fixed with a fixing nut;
A girder-type support device, wherein the tie rod bar is tightened to generate tension in the girder frame and the auxiliary frame.   The girder-type support device according to claim 2, wherein the tie rod bar is disposed between the auxiliary frames, and a reinforcing plate that covers the entire lower surface of the auxiliary frame is fixed to the auxiliary frame.

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