JP6920118B2 - Demolition system for existing structures - Google Patents

Description

The present invention relates to a dismantling system for dismantling an existing structure.

Conventionally, existing buildings have been demolished due to the deterioration of equipment and skeletons. There are the following methods for demolishing existing buildings.
For example, there is a method in which a mast is installed from the ground surface along an existing building, a tower crane is attached to the mast, and the demolition material is unloaded by the tower crane. In this case, the mast is temporarily fixed to the structure of the existing building and lifted down as the building is demolished (see Patent Document 1).

However, when a tower crane is used from the ground surface to the existing building, it is necessary to build a large mast from the ground surface to the top floor, so the demolition work becomes large and the construction cost increases. There was a problem.

In order to solve this problem, a dismantling method as described in Patent Document 2 below has been proposed. That is, a part of the existing floor on the rooftop floor of the existing building is included as the crane installation floor, the crane is installed on the crane installation floor, and the crane installation floor is temporarily supported by the support pillar which is the existing pillar. Then, while dismantling the existing building using a crane, the crane installation floor is lowered along the support columns.

JP-A-2010-255374 Japanese Unexamined Patent Publication No. 2016-17291

However, since a crane installation floor is constructed using a part of the existing floor, there is a problem that large-scale reinforcement is required and the construction cost increases.

An object of the present invention is to provide a dismantling system for an existing structure that can reduce construction costs.

The dismantling system for an existing structure according to claims 1 and 2 is a dismantling system (for example, a dismantling system 2 described later) for dismantling an existing structure (for example, an existing building 1 described later), and is an existing structure. A crane installation floor constructed on a predetermined floor (for example, the crane installation floor 20 described later), a support pillar (for example, a support pillar 11A described later) which is an existing pillar supporting the crane installation floor, and the crane. The elevating device includes a crane installed on the installation floor (for example, a crane 21 described later) and an elevating device (for example, an elevating device 22 described later) for lowering the crane installation floor along the support pillar. A rectangular frame-shaped frame (for example, a frame 40 described later) provided around the support pillar is provided, and the crane installation floor is a beam member (for example, a beam member described later) for connecting the frames of the elevating device to each other. 30) and a plate-shaped floor member (for example, a floor member 31 described later) provided on the beam member are provided.

According to the present invention, the dismantling system is configured to include a support column, a crane installation floor, a crane, and an elevating device, and while dismantling an existing structure with a crane, the elevating device raises the crane installation floor along the support column. It was lowered. Therefore, unlike the conventional case, a part of the existing floor is not used for the crane installation floor, so that large-scale reinforcement is not required and the construction cost can be reduced.
Further, the frames of the lifting device were connected to each other by a beam member, and a floor member was provided on the beam member to form a crane installation floor. Therefore, the crane installation floor can be easily constructed with an arbitrary size by appropriately selecting the size and length of the beam member. Further, since the elevating device can be easily diverted by removing the beam member from the frame, the construction cost can be reduced.

In the dismantling system of the existing structure according to claims 1 and 2, the lifting device is attached to the upper end of the support column, extends substantially horizontally, and is rotatably provided on both ends (for example,). , A reaction force member having a pulley 64 described later (for example, a reaction force member 41 described later) and a suspension member wound around the pulley of the reaction force member and one end connected to the frame (for example, a suspension member described later). and 42), the lifting jack to pull the other end of the suspension member provided on the frame (e.g., a strand jack 43) described below, you further comprising a.

According to the present invention, the elevating device includes a frame, a reaction force member, a suspension member, and an elevating jack, the suspension member is wound around a pulley of the reaction force member, and one end side of the suspension member is connected to the frame. Then, the other end side of the hanging material was connected to the elevating jack. Therefore, by pulling the suspension material with the elevating jack, the crane installation floor rises with respect to the support pillar, and by sending out the suspension material with the elevating jack, the crane installation floor descends with respect to the support pillar. Therefore, by using the pulley of the reaction force member, the crane installation floor can be raised and lowered with a single lifting jack, so that the construction cost can be reduced.

In the dismantling system of the existing structure according to claim 1 , the elevating jack is a strand jack capable of pulling a plurality of strands, and the suspending material is a straight line among the plurality of strands of the strand jack. It is composed of a predetermined number of strands arranged on a line, and the pulley is characterized in that the pulleys having the same diameter are stacked by the predetermined number of strands.

According to the present invention, the suspending material is composed of a predetermined number of strands arranged in a straight line among the plurality of strands of the elevating jack. Further, the pulley was constructed by stacking a predetermined number of pulleys having the same diameter. Therefore, since pulleys having the same shape can be used, the pulley can be easily manufactured.

In the dismantling system of the existing structure according to claim 2 , the reaction force member is a rectangular tubular box member (for example, a box member 60 described later) in which the upper end is covered with the upper end of the support column and the upper end is closed. A reaction beam (for example, a reaction beam 61 described later) provided on the box member and extending substantially horizontally, and a reaction beam 61 provided on the inner wall surface of the box member and capable of contacting the side surface of the support column. It is characterized by including a temporary fixing jack (for example, a temporary fixing jack 62 described later).

According to the present invention, since the reaction force member is configured to include the box member, the reaction force beam, and the temporary fixing jack, the box member is put on the support column and the temporary fixing jack inside the box member is expanded and contracted. By contacting the side surface of the support column, the reaction force member can be easily temporarily fixed to the support column.

In the dismantling system of the existing structure according to claim 2 , the temporary fixing jack can be changed in length by rotating a screw (for example, a screw 66 described later), and the side surface of the box member can be changed. A long hole (for example, a long hole 67 described later) through which the screw penetrates is formed, and a chain (for example, a chain 69 described later) is wound around the tip of the screw. ..

According to the present invention, an elongated hole through which the screw of the temporary fixing jack penetrates is formed on the side surface of the box member. Therefore, when the screw is rotated to change the length dimension of the temporary fixing jack, even if the position of the screw moves a little, the screw does not get caught in the elongated hole.
Moreover, since the chain is wound around the tip of the screw, the temporary fixing jack can be easily operated by simply pulling the chain from below.

According to the present invention, large-scale reinforcement is not required, and the construction cost can be reduced.

It is a side view of the demolition system of the existing structure which concerns on one Embodiment of this invention, and the existing building to which this demolition system is applied. It is a top view of the demolition system and the existing building which concerns on the said Embodiment. FIG. 1 is a cross-sectional view taken along the line II of FIG. It is an image diagram (No. 1) of the dismantling system according to the said embodiment. It is an image diagram (No. 2) of the dismantling system according to the said embodiment. It is a top view of the part surrounded by the broken line A of FIG. FIG. 6 is a view taken along the line II-II of FIG. FIG. 6 is a view taken along the line III-III in FIG. FIG. 7 is a sectional view taken along line VI-VI of FIGS. 7 and 8. It is a VV cross-sectional view of FIG. 7 and FIG. It is an image figure of the part surrounded by the broken line A of FIG. It is a schematic diagram which shows the operation of the lifting device of the dismantling system used in the dismantling method which concerns on the said Embodiment. It is a top view of the tip surface and the pulley of the strand jack of the dismantling system which concerns on the said embodiment. It is a vertical cross-sectional view in two different directions of the box member of the dismantling system which concerns on the said embodiment. It is a figure which shows the operation of the temporary fixing jack of the dismantling system which concerns on the said embodiment. It is a schematic diagram (the 1) which shows the operation of the locking device of the dismantling system which concerns on the said embodiment. It is a schematic diagram (No. 2) which shows the operation of the locking device of the dismantling system which concerns on the said embodiment. It is a top view of the steady rest device of the dismantling system which concerns on the said embodiment. It is an enlarged plan sectional view of the steady rest device of the dismantling system which concerns on the said embodiment. It is a flowchart of the procedure of dismantling an existing building by the dismantling method which concerns on the said Embodiment. It is explanatory drawing (the 1) of the dismantling procedure of the existing building which concerns on the said embodiment. It is explanatory drawing (the 2) of the dismantling procedure of the existing building which concerns on the said embodiment. It is explanatory drawing (the 3) of the dismantling procedure of the existing building which concerns on the said embodiment. It is explanatory drawing (the 4) of the dismantling procedure of the existing building which concerns on the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of an existing structure dismantling system 2 according to an embodiment of the present invention and an existing building 1 as an existing structure to which the dismantling system 2 is applied. FIG. 2 is a plan view of the demolition system 2 and the existing building 1. FIG. 3 is a cross-sectional view taken along the line II of FIG. 4 and 5 are image diagrams of the dismantling system 2.
The existing building 1 is a building with n (n is a natural number) floor, and has a rectangular shape in a plan view. Hereinafter, the longitudinal direction of the existing building 1 will be referred to as the X direction, and the lateral direction substantially orthogonal to the X direction will be referred to as the Y direction.

The existing building 1 has a rigid frame structure and 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 dismantled using the dismantling system 2 which is the following temporary structure.
The dismantling system 2 includes a crane installation floor 20 constructed on the core portion 3 of the rooftop floor of the existing building 1, a crane 21 installed on the crane installation floor 20, and a crane installation floor 20 attached to a support column 11A. A lifting device 22 that lowers the crane 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 of the support column 11A, and the crane installation floor 20 in the horizontal direction. A steady rest device 24 for preventing shaking is provided.

The crane installation floor 20 is constructed in the central part of the rooftop floor of the existing building 1. Specifically, the crane installation floor 20 has a beam member 30 which is a plurality of H-shaped steels connecting the elevating devices 22 to each other, and a plate-shaped lining plate which is placed on the beam member 30. A floor member 31 is provided.

A pair of traveling rails 32 made of H-shaped steel extending in the X direction are placed on the crane installation floor 20.
The crane 21 includes a traveling bogie 33 traveling on a traveling rail 32, a crane main body 34 rotatably supported by the traveling bogie 33, a jib 35 undulatingly supported by the crane main body 34, and the jib. A hook (not shown) suspended and supported at the tip of the 35, and a hoisting device 36 provided on the crane main body 34 for raising and lowering the hook are provided.

The support pillar 11A is a part of the existing pillar 11, and two rows of existing pillars 11 constituting the core portion 3 of the existing building 1 are selected every two pillars.
The flange of the support column 11A extends in the X direction, and the web of the support column 11A extends in the Y direction.

FIG. 6 is a plan view of the portion surrounded by the broken line A in FIG. FIG. 7 is a view taken along the line II-II of FIG. 6, and FIG. 8 is a view taken along the line III-III of FIG. 9 is a VI-VI cross-sectional view of FIGS. 7 and 8, and FIG. 10 is a V-V cross-sectional view of FIGS. 7 and 8. FIG. 11 is an image diagram of a portion surrounded by a broken line A in FIG.

The elevating device 22 includes a rectangular frame-shaped frame 40 that surrounds the support column 11A and becomes a part of the crane installation floor 20, a reaction force member 41 that is attached to the upper end of the support column 11A and extends substantially horizontally, and a reaction force member. A suspension member 42 wound around a 41 and one end side connected to a frame 40, and a strand jack 43 as an elevating jack provided on the frame 40 and pulling the other end side of the suspension member 42 are provided.

The frame 40 is located at a position opposite to the rectangular frame-shaped base portion 50, the gate-shaped jack support portion 51 rotatably provided on the base portion 50, and the jack support portion 51 with the support pillar 11A of the base portion 50 interposed therebetween. The gate-shaped suspension member support portion 52 provided so as to be rotatable is provided.

The base 50 includes a pair of beam members 53A made of H-shaped steel extending substantially in parallel in the X direction, and a pair of beam members 53B made of H-shaped steel extending substantially parallel in the Y direction by connecting the beam members 53A to each other. , Equipped with. The beam member 30 of the crane installation floor 20 connects the frames 40 of the elevating device 22 to each other, and the beam member 30 of the crane installation floor 20 is connected to the joint between the beam members 53A and 53B of the elevating device 22. Has been done.

The jack support portion 51 is rotatably supported on the upper surface of one beam member 53A, and the suspension member support portion 52 is rotatably supported on the upper surface of the other beam member 53A.
The strand jack 43 is fixed upward to the jack support portion 51.
An insertion hole 54 extending in the length direction of the beam member 53A is formed in the lower portion of the pair of beam members 53A. On the lower surface of the insertion hole 54, a plurality of bolt insertion holes 55 are formed side by side in the length direction of the beam member 53A (see FIG. 18).

The reaction force member 41 includes a rectangular tubular box member 60 that covers 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 temporary fixing jack (uniblock) 62 (see FIG. 14) provided on the inner wall surface of the member 60 and capable of contacting the outer surface of the flange of the support column 11A made of H-shaped steel is provided.

The reaction beam 61 includes a pair of horizontal members 63 that are substantially parallel to each other, and a pair of pulleys 64 that are rotatably supported between both ends of the pair of horizontal members 63.
The suspension member 42 is wound around a pair of pulleys 64, one end side of which is connected to the suspension member support portion 52, and the other end side of which is connected to a strand jack 43 fixed to the jack support portion 51.

In the above elevating device 22, when the strand jack 43 pulls the suspension member 42, the crane installation floor 20 rises with respect to the support pillar 11A, as shown in FIG. 12A. On the other hand, as shown in FIG. 12B, when the strand jack 43 sends out the suspension member 42, the crane installation floor 20 descends with respect to the support pillar 11A.

FIG. 13A is a plan view of the tip end surface (upper end surface) of the strand jack 43. FIG. 13B is a plan view of the pulley 64.
The strand jack 43 has a circular tip surface, and can pull, for example, seven strands. In the present embodiment, as shown in FIG. 13A, of the seven strands, only three strands aligned in a straight line passing through the center of the tip surface of the strand jack 43 are used as the suspending member 42.
The pulley 64 is formed by stacking three pulleys 65 having the same diameter, and a suspension member 42 as three strands of the strand jack 43 is wound around the pulley 64.

FIG. 14 is a vertical cross-sectional view of the box member 60 in two different directions. FIG. 15 is a diagram showing the operation of the temporary fixing jack 62.
The temporary fixing jack 62 expands and contracts by rotating the screw 66, and the length dimension l ₁ in the horizontal direction can be changed. In the temporary fixing jack 62, the screw 66 has a structure located at the center of the temporary fixing jack 62 in the length direction.

An elongated hole 67 extending in the horizontal direction is formed on the side surface of the box member 60, and the screw 66 penetrates the elongated hole 67 and projects to the outside. As described above, since the screw 66 is located at the center of the temporary fixing jack 62 in the length direction, it is possible to respond to a change in the length dimension of the temporary fixing jack 62 by forming the elongated hole 67 in the horizontal direction. It has become.

A disk-shaped handle 68 is provided at the tip of the screw 66. A chain 69 is wound around the handle 68 and hangs downward. Therefore, by pulling the chain 69 from below the box member 60 and rotating the screw 66, the length dimension of the temporary fixing jack 62 can be appropriately adjusted. As a result, the temporary fixing jack 62 comes into contact with the outer surface of the flange of the support pillar 11A, and the box member 60 can be temporarily fixed to the support pillar 11A.

16 and 17 are schematic views showing the operation of the locking device 23.
As shown in FIGS. 7 to 10, the locking device 23 is a pair of opening / closing mechanisms 71A and 71B that move substantially horizontally in the direction of approaching or separating the pair of piercing beams 70 and the pair of piercing beams 70 from each other. And.
A pair of joint portions 14 extend sideways on the back-to-back side surfaces of the support columns 11A, and the locking device 23 places a pair of through beams 70 on the upper surfaces of the pair of joint portions 14 to lock the support columns 11A. ..

The opening / closing mechanism 71A is provided on one beam member 53B of the base 50, and the pair of support portions 72 that support one end side of the pair of piercing beams 70 from below and the pair of support portions 72 are substantially horizontal. A moving mechanism 73 for moving is provided.

The support portion 72 includes a horizontal piece 721 that supports the bottom surface of the punching beam 70 from below, and a pair of vertical pieces 722 that extend vertically from both ends of the horizontal piece 721 and abut on both side surfaces of the punching beam 70. ..
_{As shown in FIGS. 16 and 17, the distance h 1} from the upper surface of the horizontal piece 721 of the support portion 72 to the lower surface of the beam member 53B is slightly higher than the height dimension h _{2 of the beam 70.} ..

The moving mechanism 73 includes a motor 74, a pulley 75 rotatably provided at a position horizontally separated from the motor 74, and a chain 76 wound between the motor 74 and the pulley 75. One support portion 72 is fixed to the upper portion of the chain 76, and the other support portion 72 is fixed to the lower portion of the chain 76. Further, by rotating the screw 77, the pulley 75 approaches or separates from the motor 74, whereby the tension of the chain 76 can be adjusted.

The opening / closing mechanism 71B is provided on the other beam member 53B of the base 50, and the pair of support portions 72 that support the other end side of the pair of piercing beams 70 from below and the pair of support portions 72 are substantially horizontal. It is provided with a moving mechanism 73 that moves to. The support portion 72 and the moving mechanism 73 of the opening / closing mechanism 71B have the same configuration as the supporting portion 72 and the moving mechanism 73 of the opening / closing mechanism 71A.

In the locking device 23, the crane installation floor 20 is locked to the upper surface of the joint portion 14 projecting laterally from the support column 11A as follows.
That is, by driving the motors 74 of the opening / closing mechanisms 71A and 71B and rotating the chain 76 in the direction of the arrow in FIG. 70 is positioned on the joint portion 14 of the support column 11A.

In this state, when the crane installation floor 20 is lowered by the lifting device 22, the crane beam 70 is locked to the upper surface of the joint portion 14 of the support column 11A, and the beam member 53A of the crane installation floor 20 is engaged with the crane beam 70. Stop (see FIGS. 7 and 8). As a result, the crane installation floor 20 is supported by the support pillar 11A.
At this time, the perforated beam 70 moves upward relative to the support portion 72, but since the pair of vertical pieces of the support portion 72 are in contact with both side surfaces of the perforated beam 70, the perforated beam 70 moves upward. However, it is possible to prevent the plumb bob beam 70 from falling off.

On the other hand, in the locking device 23, the locked state of the joint portion 14 of the crane installation floor 20 is released as follows.
That is, the crane installation floor 20 is slightly raised by the elevating device 22, the beam 70 is moved downward relative to the support portion 72, and is placed on the horizontal piece 721 of the support portion 72. As a result, a gap is formed between the upper surface of the beam 70 and the lower surface of the beam member 53B.
In this state, the motors 74 of the opening / closing mechanisms 71A and 71B are driven to rotate the chain 76 in the direction of the arrow in FIG. 17, so that the pair of through-beams 70 supported by the support portion 72 are separated from each other. The pair of piercing beams 70 are retracted from above the joint portion 14 of the support column 11A. As a result, the beam 70 can be smoothly moved horizontally without the beam 70 and the beam member 53B coming into contact with each other.

FIG. 18 is a plan view of the steady rest device 24. FIG. 19 is an enlarged plan sectional view of the steady rest device 24.
The steady rest device 24 is supported by the crane installation floor 20 and abuts on the flange surface on the side surface of the support pillar 11A to hold it down.
The steady rest device 24 is erected between the beam members 53A of the crane installation floor 20 so as to be horizontally movable in the X direction and extends in the Y direction, and a pair of first support members 80 and a pair of Y on each of the first support members 80. A second support member 81 provided so as to be horizontally movable in the direction, a bolt 82 screwed into each second support member 81 to adjust the protrusion dimension in the Y direction from the second support member, and each second support. A sliding member 83 provided on the member 81 and having a smooth surface is provided.

The first support member 80 is erected with the support column 11A sandwiched between the pair of beam members 53A from the X direction. Both ends of the first support member 80 are inserted into the insertion holes 54 of the beam member 53A, and are selectively bolted to the plurality of bolt insertion holes 55. As a result, the first support member 80 can be temporarily fixed at an arbitrary position in the X direction of the beam member 53A.

The second support member 81 is provided at a position where the support pillar 11A is sandwiched between the first support members 80 from the Y direction. The first support member 80 is formed with a plurality of bolt insertion holes 84 arranged side by side in the length direction of the second support member 81. The second support member 81 is selectively bolted to a plurality of bolt insertion holes 84. As a result, the second support member 81 can be temporarily fixed at an arbitrary position in the Y direction of the first support member 80.

The sliding member 83 is located near the edge of the flange of the support column 11A. When the crane installation floor 20 is lowered, the sliding member 83 slides on the support pillar 11A to ensure smooth ascent and descent of the crane installation floor 20.

In the steady rest device 24, the bolt 82 is rotated to move forward, and the head of the bolt 82 is brought into contact with the flange surface of the support pillar 11A to prevent the crane installation floor 20 from being steady in the Y direction. On the other hand, by rotating the bolt 82 to retract it, the steady rest of the crane installation floor 20 in the Y direction can be released.
Further, as shown in FIG. 19, a wedge 85 is driven between the sliding member 83 and the edge of the flange of the support column 11A to prevent the crane installation floor 20 from being swayed in the X direction. On the other hand, by removing the wedge 85, the steady rest of the crane installation floor 20 in the X direction can be released.

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. 1, the demolition system 2 is constructed on the rooftop floor of the existing building 1.
That is, a crane installation floor 20, a crane 21, an elevating device 22, a locking device 23, and a steady rest device 24 are constructed on the rooftop floor of the existing building 1.

Here, for the portion where the crane installation floor 20 is constructed, the temporary pillar 15 is mounted on the predetermined existing pillar 11, and the reaction force member 41 of the lifting device 22 is attached to the support pillar 11A of the existing pillar 11 as a temporary pillar. Attach to the top of 15. At this time, the temporary fixing jack 62 of the reaction force member 41 is driven to temporarily fix the reaction force member 41 to the support column 11A.
Further, the crane installation floor 20 is temporarily supported on the support pillar 11A by mounting the crane beam 70 of the locking device 23 on the joint portion 14 of the support pillar 11A at the rooftop floor level via the temporary piece 16. Let me.
Further, the bolt 82 of the steady rest device 24 is used to hold the crane installation floor 20 in the Y direction, and the wedge 85 of the steady rest device 24 is attached to hold the crane installation floor 20 in the X direction.

In step S2, as shown in FIG. 21, the existing building 1 is disassembled into two layers from the rooftop floor by using the crane 21 and leaving the support pillar 11A and the existing pillar 11 adjacent to the support pillar 11A. At this time, the joint portion 14 of the support column 11A is left.
When step S2 is repeated in step S9 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.
That is, the steady rest of the crane installation floor 20 by the support pillar 11A is released. Specifically, the bolt 82 of the steady rest device 24 is retracted, and the wedge 85 of the steady rest device 24 is removed.
Next, tension is introduced into the suspension material 42 by the strand jack 43, and the crane installation floor 20 is lifted slightly upward to cut the ground. In this state, the opening / closing mechanisms 71A and 71B of the locking device 23 are driven to retract the pair of punching beams 70 from above the joint portion 14 of the support column 11A.

In step S4, as shown in FIG. 22, the strand jack 43 is driven to lower the crane installation floor 20 by one layer along the support pillar 11A. At this time, the sliding member 83 of the steady rest device 24 guides the descent of the crane installation floor 20.

In step S5, the crane installation floor 20 is temporarily supported by the support pillar 11A again.
That is, the opening / closing mechanisms 71A and 71B of the locking device 23 are driven to position the pair of punching beams 70 on the joint portion 14 of the support column 11A. Next, the crane installation floor 20 is lowered by the strand jack 43, and the piercing beam 70 is locked to the upper surface of the joint portion 14 of the support column 11A. Next, the bolt 82 of the steady rest device 24 is used to hold the crane installation floor 20 in the Y direction, and the wedge 85 of the steady rest device 24 is attached to hold the crane installation floor 20 in the X direction.

In step S6, as shown in FIG. 23, the upper part of the existing pillar 11 is cut and removed, the reaction force member 41 of the elevating device 22 is removed from the support pillar 11A, and the existing pillar 11 is temporarily placed on the top of the other existing pillar 11. ..
That is, by pulling the chain 69 from the crane installation floor 20, the temporary fixing jack 62 of the reaction force member 41 is driven to release the temporary fixing of the reaction force member 41. Next, the reaction force member 41 is lifted by the crane 21 and temporarily placed on the top of the existing pillar 11 adjacent to the support pillar 11A.
In step S7, the upper part of the support column 11A is cut and removed. In this way, the upper part of all the existing pillars 11 including the support pillar 11A is removed.

In step S8, as shown in FIG. 24, the reaction force member 41 temporarily placed on the top of the other existing pillar 11 is temporarily fixed to the top of the support pillar 11A again.
That is, the temporarily placed reaction force member 41 is lifted by the crane 21 and rearranged on the top of the support column 11A. Next, by pulling the chain 69 from above the crane installation floor 20, the temporary fixing jack 62 of the reaction force member 41 is driven to temporarily fix the reaction force member 41 to the support pillar 11A.
Step S9 repeats steps S2 to S8.

According to this embodiment, there are the following effects.
(1) The dismantling system 2 includes a support column 11A, a crane installation floor 20, a crane 21, an elevating device 22, and a locking device 23, and the elevating device 22 dismantles the existing building 1 with the crane 21. The crane installation floor 20 was lowered along the support column 11A. Therefore, unlike the conventional case, a part of the existing floor is not used for the crane installation floor, so that large-scale reinforcement is not required and the construction cost can be reduced.
Further, the frames 40 of the elevating device 22 are connected to each other by a beam member 30, and a plate-shaped floor member 31 is provided on the beam member 30 to form a crane installation floor 20. Therefore, the crane installation floor 20 can be easily constructed with an arbitrary size by appropriately selecting the size and length of the beam member 30. Further, by removing the beam member 30 from the frame 40 of the elevating device 22, the elevating device 22 can be easily diverted, so that the construction cost can be reduced.

(2) The lifting device 22 includes a frame 40, a reaction force member 41, a suspending member 42, and a strand jack 43. Further, the suspension material 42 is wound around the pulley 64 of the reaction force member 41, one end side of the suspension material 42 is connected to the suspension material support portion 52 of the frame 40, and the other end side of the suspension material 42 is connected to the strand jack 43. bottom. Therefore, by pulling the suspension material 42 by the strand jack 43, the crane installation floor 20 rises with respect to the support pillar 11A, and by sending out the suspension material 42 by the strand jack 43, the crane installation floor 20 with respect to the support pillar 11A. And descend. Therefore, by using the pulley 64 of the reaction force member 41, the crane installation floor 20 can be raised and lowered by a single strand jack 43, so that the construction cost can be reduced.

(3) The suspension member 42 was composed of three strands arranged in a straight line among the seven strands of the strand jack 43, and the pulley 64 was constructed by stacking three pulleys 65 having the same diameter. Therefore, since the pulley 65 having the same shape can be used, the pulley 64 can be easily manufactured.

(4) Since the reaction force member 41 is configured to include the box member 60, the reaction force beam 61, and the temporary fixing jack 62, the box member 60 is put on the support column 11A and the temporary fixing jack inside the box member 60 is covered. By expanding and contracting the 62 and bringing it into contact with the side surface of the support column 11A, the reaction force member 41 can be easily temporarily fixed to the support column 11A.

(5) An elongated hole 67 through which the screw 66 of the temporary fixing jack 62 penetrates is formed on the side surface of the box member 60. Therefore, when the screw 66 is rotated to change the length dimension of the temporary fixing jack 62, the screw 66 does not get caught in the elongated hole 67 even if the position of the screw 66 moves slightly.
Further, since the chain 69 is wound around the handle 68 at the tip of the screw 66, the temporary fixing jack 62 can be easily operated by simply pulling the chain 69 from below.

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 (existing structure) 2 ... Dismantling system 3 ... Core part 11 ... Existing pillar 11A ... Support pillar 12 ... Existing beam 13 ... Existing floor 14 ... Support pillar joint part 15 ... Temporary pillar 16 ... Temporary piece 20 ... Crane installation floor 21 ... Crane 22 ... Lifting device 23 ... Locking device 24 ... Steering device 30 ... Beam member 31 ... Floor member 32 ... Travel rail 33 ... Traveling carriage 34 ... Crane body 35 ... Jib 36 ... Hoisting device 40 ... Frame 41 ... Reaction force member 42 ... Hanging material 43 ... Strand jack (elevating jack)
50 ... Base 51 ... Jack support 52 ... Suspension support 53A, 53B ... Beam member 54 ... Insertion hole 55 ... Bolt insertion hole 60 ... Box member 61 ... Reaction beam 62 ... Temporary fixing jack 63 ... Horizontal member 64 ... Pulley 65 ... Pulley 66 ... Screw 67 ... Long hole 68 ... Handle 69 ... Chain 70 ... Jack beam 71A, 71B ... Opening and closing mechanism 72 ... Support 73 ... Moving mechanism 74 ... Motor 75 ... Pulley 76 ... Chain 721 ... Horizontal piece 722 ... Vertical Piece 80 ... 1st support member 81 ... 2nd support member 82 ... Bolt 83 ... Sliding material 84 ... Bolt insertion hole 85 ... Wedge

Claims (2)

A dismantling system that dismantles existing structures
The crane installation floor constructed on a predetermined floor of the existing structure, the support pillars which are the existing pillars supporting the crane installation floor, the crane installed on the crane installation floor, and the crane installation floor are described as described above. Equipped with an elevating device that lowers along the support pillar,
The elevating device includes a rectangular frame-shaped frame provided so as to surround the support pillar.
The crane installation floor includes a beam member that connects the frames of the elevating device to each other, and a plate-shaped floor member provided on the beam member .
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 hanging member whose side is connected to the frame and an elevating jack provided on the frame and pulling the other end side of the hanging member are further provided.
The elevating jack is a strand jack capable of pulling a plurality of strands.
The suspending material is composed of a predetermined number of strands arranged in a straight line among a plurality of strands of the strand jack.
The pulley is a dismantling system for an existing structure, characterized in that a predetermined number of pulleys having the same diameter are stacked. A dismantling system that dismantles existing structures
The crane installation floor constructed on a predetermined floor of the existing structure, the support pillars which are the existing pillars supporting the crane installation floor, the crane installed on the crane installation floor, and the crane installation floor are described as described above. Equipped with an elevating device that lowers along the support pillar,
The elevating device includes a rectangular frame-shaped frame provided so as to surround the support pillar.
The crane installation floor includes a beam member that connects the frames of the elevating device to each other, and a plate-shaped floor member provided on the beam member .
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 hanging member whose side is connected to the frame and an elevating jack provided on the frame and pulling the other end side of the hanging member are further provided.
The reaction force member includes a rectangular tubular box member that is covered on the upper end of the support column and the upper end is closed.
A reaction beam provided on the box member and extending substantially horizontally,
A temporary fixing jack provided on the inner wall surface of the box member and capable of contacting the side surface of the support column is provided.
The length of the temporary fixing jack can be changed by rotating the screw.
An elongated hole through which the screw penetrates is formed on the side surface of the box member.
A dismantling system for existing structures, characterized in that a chain is wound around the tip of the screw.

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