JP6950041B1 - Structure dismantling system and structure dismantling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure dismantling system capable of smooth jacking down work. A structure dismantling system 2 includes a crane installation floor 20, support columns 11A, and an elevating device 22. The lifting device 22 includes a reaction force member 50 attached to the upper end of the support column 11A, a suspension member 51 wound around a pulley 612 of the reaction force member 50 and one end connected to the crane installation floor 20, and a crane installation floor 20. The strand jack 52 is provided in the above and pulls the other end side of the hanging member 51. The reaction force member 50 is provided on the upper end of the support column 11A, the box member 60, the reaction force beam 61 provided on the box member 60 and extending substantially horizontally, and the inner wall surface of the box member 60 to support the reaction member 50. It includes an air jack 62 for temporary fixing that can come into contact with the side surface of the pillar 11A, and a take-up drum 64 that is provided on the side surface of the box member 60 and on which the air hose 63 of the air jack 62 is wound. [Selection diagram] Fig. 2

Description

The present invention relates to a structure dismantling system for dismantling a structure, and a structure dismantling method using this structure dismantling system.

Conventionally, there are the following methods as a method of disassembling an existing structure (see Patent Document 1).
In Patent Document 1, a predetermined existing pillar of an existing structure is used as a support pillar, and a crane installation floor on which a crane is installed is constructed by temporarily supporting the support pillar, and each floor is dismantled by this crane. , A method of dismantling an existing structure from the upper layer to the lower layer by lowering the crane installation floor along the support column is shown.
In this dismantling method, when the crane installation floor is lowered (jack down), a reaction force member is fixed to the upper end of the support column, and the reaction force member is used to lower the crane installation floor by an elevating jack. On the other hand, when the upper end of the support column is cut and removed, it is necessary to remove the reaction force member once.
Therefore, a temporary fixing jack is provided on the inner wall surface of the reaction force member, and the reaction force member is temporarily fixed to the upper end of the support column by pressing the side surface of the support column with the temporary fixing jack. The thickness of this temporary fixing jack can be changed by rotating the screw, and a chain is wound around the tip of the screw. Therefore, by pulling this chain, the screw is rotated and the side surface of the support column is pressed by the temporary fixing jack.

In the above-mentioned dismantling method, the long chain of the temporarily fixed jack became an obstacle during jacking down, and the jacking down work could not be performed smoothly.

Japanese Unexamined Patent Publication No. 2019-15151

The present invention has a structure capable of smoothly jacking down the crane installation floor when the structure is dismantled from the upper floor to the lower floor while jacking down the crane installation floor covering the floor to be demolished. An object of the present invention is to provide a material dismantling system and a structure dismantling method.

The structure dismantling system of the first invention (for example, the structure dismantling system 2 described later) is a dismantling system for dismantling a structure (for example, an existing building 1 described later) on a predetermined floor of the structure. A constructed temporary roof (for example, a crane installation floor 20 described later), a support pillar (for example, a support pillar 11A described later) which is an existing pillar supporting the temporary roof, and the temporary roof along the support pillar. A pair of cranes provided with an elevating device (for example, an elevating device 22 described later) for lowering the elevating device, which is attached to the upper end of the support column, extends substantially horizontally, and is rotatably provided on both end sides. A reaction force member (for example, a reaction force member 50 described later) having (for example, a crane 612 described later) and a hanging member wound around the pulley of the reaction force member and one end connected to the temporary roof (for example, described later). 51) and an elevating jack (for example, a strand jack 52 described later) provided on the temporary roof and provided on the other end side of the suspension member, and the reaction force member is the support pillar. A rectangular tubular box member (for example, a box member 60 described later) which is covered on the upper end of the box member and whose upper end is closed, and a reaction beam (for example, a reaction force beam described later) provided on the box member and extending substantially horizontally. The reaction beam 61), an air jack for temporary fixing (for example, an air jack 62 described later) provided on the inner wall surface of the box member and capable of contacting the side surface of the support column, and the side surface of the box member. It is characterized by including a provided take-up drum (for example, a take-up drum 64 described later).

According to the present invention, the reaction force member is temporarily fixed to the support column by the following procedure. That is, the box member of the reaction force member is put on the upper end of the support column, and in this state, the tip of the air hose is pulled out from the take-up drum to the floor where the crane is installed. Then, the tip of the drawn air hose is connected to the compressor, the compressor is driven, and compressed air is injected into the air jack through the air hose. As a result, the air jack is extended, loaded on the outer surface of the support column by the air jack, and the reaction force member is temporarily fixed to the support column. After that, the valve of the air jack is closed to hold the load by the air jack, and then the air hose is removed from the compressor and stored in the take-up drum.
Therefore, when the temporary roof is lowered (jacked down) by the elevating jack, the air hose is wound up and stored in the drum, so that the air hose does not get in the way and the jacking down work can be smoothly performed.
Further, by driving the compressor, the axial force can be quickly introduced into the air jack, so that the construction period can be shortened as compared with the conventional case.

The structure dismantling method of the second invention is a dismantling method of dismantling a structure using the above-mentioned structure dismantling system, in which a predetermined existing pillar of the structure is used as a support pillar and provisionally supported by the support pillar. The first step of constructing the temporary roof on the predetermined floor of the structure (for example, step S1 described later) and the second step of disassembling one layer from the predetermined floor while leaving at least the support pillars. (For example, in step S2 described later), the temporary support of the temporary roof by the support pillars is released, the temporary roof is lowered by one layer along the support pillars, and then the temporary roof is lowered by the support pillars. In the third step (for example, steps S3 to S5 described later) of temporarily supporting the support column again, the reaction force member is removed from the support column, the upper part of the support column is removed, and then the top of the support column is covered with the above. A fourth step (for example, step S6 described later) in which the reaction force member is re-covered and the reaction force member is temporarily fixed to the support column, and a fifth step (for example, step S6) in which the second step to the fourth step are repeated are repeated. When the reaction force member is temporarily fixed to the top of the support column, the reaction force member is placed on the top of the support column, and in this state, the winding is performed. The tip of an air hose (for example, an air hose 63 described later) is pulled out from a drum onto the temporary roof and connected to a compressor (for example, a compressor 65 described later), and compressed air is supplied from the compressor to the air jack. The reaction force member is temporarily fixed to the top of the support column, and then the air hose is removed from the compressor and stored in the take-up drum.

According to the present invention, the same effect as that of the first invention is obtained.

According to the present invention, when the structure is dismantled from the upper floor to the lower floor while the crane installation floor covering the dismantling target floor is jacked down, the crane installation floor can be smoothly jacked down. , Structure dismantling systems and structure dismantling methods can be provided.

It is a side view of the existing building provided with the structure demolition system which concerns on one Embodiment of this invention. It is an enlarged view of the part surrounded by the broken line A of the structure dismantling system of FIG. It is a vertical cross-sectional view of the box member which constitutes the reaction force member of the structure dismantling system. It is explanatory drawing of the procedure of temporarily fixing a reaction force member to a support column. It is a flowchart of the procedure of dismantling an existing building using a structure dismantling system. It is explanatory drawing of the dismantling procedure of an existing building (No. 1, the state where the existing building was disassembled into two layers from the rooftop floor). It is an explanatory view of the dismantling procedure of an existing building (No. 2, the state where the crane installation floor is lowered by one layer). It is explanatory drawing (3, the state which cut the upper part of the support pillar) of the dismantling procedure of an existing building.

According to the present invention, when the structure is dismantled from the upper floor to the lower floor while the crane installation floor covering the floor to be dismantled is jacked down, the support pillars supporting the crane installation floor and the crane installation floor are lowered. A structure dismantling system and structure dismantling that can smoothly jack down the crane installation floor by arranging an air jack between the device and the air jack and temporarily fixing the lifting device to the support column by this air jack. The method.
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of an existing building 1 as a structure provided with a structure dismantling system 2 according to an embodiment of the present invention.
The existing building 1 is an n (n is a natural number) building with a rigid frame structure, and has a rectangular shape in a plan view. The existing building 1 includes a plurality of existing columns 11 made of H-shaped steel, a plurality of existing steel-framed beams 12, and an existing reinforced concrete floor 13. Here, a part of the existing pillar 11 is a support pillar 11A that supports the crane installation floor 20.

The existing building 1 is demolished using the following structure demolition system 2.
The structure dismantling system 2 includes a crane installation floor 20 as a temporary roof constructed on the roof floor of the existing building 1, a crane 21 installed on the crane installation floor 20, and a crane installation floor attached to a support column 11A. An elevating device 22 that lowers 20 along the support column 11A, a locking device 23 that is provided on the crane installation floor 20 and can be locked to the upper surface of the joint portion 14 (see FIG. 7) of the support column 11A, and an existing building. An outer peripheral scaffold 24 installed along the outer circumference of 1 and a slide mechanism 25 for moving the crane installation floor 20 along the outer peripheral scaffold 24 are provided.

The crane installation floor 20 is constructed on the rooftop floor of the existing building 1 to cover the upper surface of the floor to be demolished of the existing building 1.
The locking device 23 includes a perforated beam 30 and a pair of opening / closing mechanisms 31 that move substantially horizontally in a direction in which the perforated beams 30 approach or separate from each other. A joint portion 14 extends laterally on the side surface of the support column 11A, and the locking device 23 can move the through beam 30 to the upper surface of the joint portion 14 to lock it.
The outer peripheral scaffold 24 is a multi-stage framework scaffold constructed on the ground surface.
The slide mechanism 25 includes a guide member 40 provided on the crane installation floor 20 and extending vertically, and a moving wall connecting 41 provided on the outer peripheral scaffold 24 in a plurality of stages and slidable in a state of being locked to the guide member 40. ..

FIG. 2 is an enlarged view of a portion of the structure dismantling system 2 of FIG. 1 surrounded by a broken line A.
The lifting device 22 includes a reaction force member 50 attached to the upper end of the support column 11A and extending substantially horizontally, a suspension member 51 wound around the reaction force member 50 and one end connected to the crane installation floor 20, and a crane installation floor. A strand jack 52 as an elevating jack provided on the 20 and pulling the other end side of the hanging member 51 is provided.
A gate-shaped jack support portion 53 is rotatably provided on the upper surface of the crane installation floor 20, and the strand jack 52 is provided on the jack support portion 53.
Further, a gantry-shaped suspension member support portion 54 is rotatably provided on the upper surface of the crane installation floor 20 and at a position opposite to the jack support portion 53 with the support pillar 11A interposed therebetween. One end of the suspension member is connected to the suspension member support portion 54.

The reaction force member 50 includes a rectangular tubular box member 60 that is placed over the upper end of the support column 11A and the upper end is closed, a reaction force beam 61 that is provided on the box member 60 and extends substantially horizontally, and a box. A pair of air jacks 62 provided on the inner wall surface of the member 60 and capable of contacting the outer surface of the support column 11A made of H-shaped steel, and an air hose 63 of the air jack 62 provided on the side surface of the box member 60 are wound up. It also includes a take-up drum 64.

The reaction beam 61 includes a pair of horizontal members 611 that are substantially parallel to each other, and a pair of pulleys 612 that are rotatably supported between both ends of the pair of horizontal members 611.
The suspension member 51 is wound around a pair of pulleys 612, one end of which is connected to the suspension member support portion 54, and the other end side of which is connected to a strand jack 52 fixed to the jack support portion 53.

In the above elevating device 22, when the strand jack 52 pulls the suspension member 51, the crane installation floor 20 rises with respect to the support pillar 11A. On the other hand, when the strand jack 52 sends out the suspension member 51, the crane installation floor 20 descends with respect to the support pillar 11A (see FIG. 7).

FIG. 3 is a vertical cross-sectional view of the box member 60 of the reaction force member 50.
The thickness t of the air jack 62 can be changed by injecting compressed air from the compressor 65 (see FIG. 4) through the air hose 63.
An air hose 63 is wound around the take-up drum 64 by an urging force. One end side of the air hose 63 is connected to the air jack 62 through a through hole formed on the side surface of the box member 60. A rope 66 is connected to the other end side of the air hose 63, and by pulling the rope 66 from below, the other end side of the air hose 63 can be pulled out downward.

Therefore, when the reaction force member 50 is temporarily fixed to the support column 11A, as shown in FIG. 4, the reaction force member 50 is placed on the upper end of the support column 11A, and in this state, the rope 66 is pulled from below. Pull out the tip of the air hose 63 from the take-up drum 64 to the crane installation floor 20. Then, the tip of the drawn air hose 63 is connected to the compressor 65, the compressor 65 is driven, and compressed air is supplied to the air jack 62 through the air hose 63. As a result, the air jack 62 is extended and loaded on the outer surface of the support column 11A, and the reaction force member 50 is temporarily fixed to the support column 11A. After that, the valve of the air jack 62 is closed to hold the load by the air jack 62, and then the air hose 63 is removed from the compressor 65 and released from the hand, so that the air hose 63 is automatically driven by the urging force of the take-up drum 64. It is wound up and stored.
On the other hand, when the temporary fixing of the reaction force member 50 is released, the valve of the air jack 62 is opened to release the air. As a result, the air jack 62 is shortened, and the reaction force member 50 can be removed from the support column 11A.

Hereinafter, the procedure for dismantling the existing building 1 using the structure dismantling system 2 will be described with reference to the flowchart of FIG.
In step S1, as shown in FIG. 1, the structure demolition system 2 is constructed in the existing building 1.
That is, a crane installation floor 20, a crane 21, an elevating device 22, a locking device 23, and a slide mechanism 25 are constructed on the rooftop floor of the existing building 1. In addition, an outer peripheral scaffold 24 will be installed around the existing building 1.
Here, since the support pillar 11A does not exist on the rooftop floor, a temporary pillar 15 is attached to the rooftop floor instead of the support pillar 11A, and the reaction force member 50 is temporarily fixed to the top of the temporary pillar 15. Further, the crane installation floor 20 is temporarily supported by the support pillar 11A by placing the crane beam 30 of the locking device 23 on the support pillar 11A at the rooftop floor level.

In step S2, as shown in FIG. 6, a crane 21 is used to disassemble the existing building 1 into two layers from the rooftop floor, leaving the support columns 11A. At this time, the joint portion 14 of the support column 11A is left.
When step S2 is repeated in step S7 described later, the existing building 1 is disassembled into one layer instead of two layers.

In step S3, the temporary support of the crane installation floor 20 by the support pillar 11A is released. Specifically, tension is introduced into the suspension member 51 by the strand jack 52, and the crane installation floor 20 is lifted slightly upward to cut the ground. In this state, the opening / closing mechanism 31 of the locking device 23 is driven to retract the pair of punching beams 30 from above the joint portion 14 of the support column 11A, and the temporary support by the support column 11A is released.

In step S4, as shown in FIG. 7, the strand jack 52 is driven to lower the crane installation floor 20 by one layer along the support pillar 11A. At this time, the guide member 40 descends along the moving wall connection 41 and slides in a state where the moving wall connection 41 is horizontally locked to the guide member 40.
In step S5, as shown in FIG. 7, the crane installation floor 20 is temporarily supported by the support pillar 11A again. That is, the opening / closing mechanism 31 of the locking device 23 is driven to position the through beam 30 on the joint portion 14 of the support column 11A. Next, the crane installation floor 20 is lowered by the strand jack 52, and the piercing beam 30 is locked to the upper surface of the joint portion 14 of the support column 11A.

In step S6, as shown in FIG. 8, the upper part of the support column 11A is cut and removed. Specifically, the temporary fixing of the reaction force member 50 is released, and the reaction force member 50 is lifted by the crane 21 and removed from the support column 11A. Next, the upper part of the support column 11A is cut and removed. After that, the reaction force member 50 is lifted by the crane 21 and put on the top of the support pillar 11A again, and the reaction force member 50 is temporarily fixed to the top of the support pillar 11A again. Further, the upper part of the outer peripheral scaffold 24, that is, the portion protruding above the crane installation floor 20, is disassembled, and the removed moving wall connecting 41 is replaced with the lower part of the guide member 40.
In step S7, steps S2 to S6 are repeated to dismantle the existing building 1 from the rooftop floor to the lower floor.

According to this embodiment, there are the following effects.
(1) When the crane installation floor 20 is lowered (jacked down) by the strand jack 52, the air hose 63 of the air jack 62 is wound up and stored in the drum 64 by an urging force, so that the air hose 63 does not get in the way and the jack is used. Down work can be performed smoothly.
Further, by driving the compressor 65, the axial force can be quickly introduced into the air jack 62, so that the construction period can be shortened as compared with the conventional case.
Since the air jack 62 is used, the thickness is thinner than that of the temporary fixing jack whose thickness can be changed with a screw such as a uniblock, and when the reaction force member 50 is attached to the support column 11A, the air jack 62 is used. It is possible to prevent the support pillar 11A from being caught. Further, since the thickness of the air jack 62 is reduced, it is possible to easily follow the change in the column shape of the support column.
(2) Since the air jack 62 is provided between the support pillar 11A and the inner wall surface of the lifting device 22, the crane installation floor 20 can be temporarily fixed to the support pillar 11A in a relatively short time, and the existing building 1 can be temporarily fixed in a short construction period. Can be disassembled.

The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the range in which the object of the present invention can be achieved are included in the present invention.

1 ... Existing building (structure) 2 ... Structure dismantling system 11 ... Existing pillar 11A ... Support pillar 12 ... Existing beam 13 ... Existing floor 14 ... Joint 15 ... Temporary pillar 20 ... Crane installation floor (temporary roof) 21 ... Crane 22 ... Elevating device 23 ... Locking device 24 ... Outer scaffolding 25 ... Slide mechanism 30 ... Crane beam 31 ... Opening and closing mechanism 40 ... Guide member 41 ... Moving wall connection 50 ... Reaction force member 51 ... Suspension material 52 ... Strand jack (elevating jack) )
53 ... Jack support 54 ... Suspension material support 60 ... Box member 61 ... Reaction beam 62 ... Air jack 63 ... Air hose 64 ... Drum 65 ... Compressor 66 ... Rope 611 ... Horizontal member 612 ... Pulley

Claims (2)

A dismantling system that dismantles structures
A temporary roof constructed on a predetermined floor of the structure, a support pillar which is an existing pillar supporting the temporary roof, and an elevating device for lowering the temporary roof along the support pillar are provided.
The elevating device includes a reaction force member having a pair of pulleys attached to the upper end of the support column, extending substantially horizontally and rotatably provided on both ends, and one end wound around the pulleys of the reaction force member. A suspension material whose side is connected to the temporary roof and an elevating jack provided on the temporary roof and provided on the other end side of the suspension material are provided.
The reaction force member includes a rectangular tubular box member that is placed over the upper end of the support column and the upper end is closed, a reaction force beam that is provided on the box member and extends substantially horizontally, and the box member. A structure dismantling system including an air jack for temporary fixing provided on the inner wall surface of the box member and capable of contacting the side surface of the support column, and a take-up drum provided on the side surface of the box member. .. A dismantling method for dismantling a structure using the structure dismantling system according to claim 1.
The first step of constructing the temporary roof on the predetermined floor of the structure by using the predetermined existing pillar of the structure as a support pillar and temporarily supporting the support pillar.
The second step of dismantling one layer from the predetermined floor while leaving at least the support pillar,
A third step of releasing the temporary support of the temporary roof by the support pillars, lowering the temporary roof by one layer along the support pillars, and then temporarily supporting the temporary roof to the support pillars again.
The reaction force member is removed from the support column, the upper part of the support column is removed, and then the reaction force member is re-covered on the top of the support column, and the reaction force member is temporarily fixed to the support column again. 4th step to do
The fifth step, which repeats the second step to the fourth step, is provided.
When the reaction force member is temporarily fixed to the top of the support column, the reaction force member is placed on the top of the support column, and in this state, the tip of the air hose from the take-up drum is placed on the temporary roof. By pulling out and connecting to the compressor and supplying compressed air from the compressor to the air jack, the reaction force member is temporarily fixed to the top of the support column, and then the air hose is removed from the compressor and the winding is performed. A structure dismantling method characterized by being stored in a drum.

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