JP2014201935A - Method of demolishing building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of demolishing a building that can efficiently demolish an RC-structured and/or SRC-structured building while suppressing generation of noise and vibration and scattering of dust.SOLUTION: Building constitution members 4 and 6 are cut in a push-cutting manner of making a wire saw 16 cut into the building constitution members 4 and 6 from the front side to the inner side, anchor bolts 33 are fixed to the separation-side building constitution members 4 and 6 and the non-separation-side building constitution members 4 and 6 respectively across a cutting groove 27 to be formed by making the wire saw 16 cut, and the cutting groove 27 is formed and while a plurality of anchor bolts 33 are inserted into bolt insertion holes of a fixation plate 31, nuts are fastened so as to install the fixation plate 31. Consequently, the separation-side building constitution members 4 and 6 and the non-separation-side building constitution members 4 and 6 are connected together detachably and held with the fixation plate 31.

Description

  The present invention relates to a building demolition method, and more particularly, to a method for demolishing a building constructed with RC and / or SRC building components.

  For example, when a building such as an office building is dismantled, if the building is an S structure (steel structure), building components such as floors, beams, columns, walls, etc. are broken down into pieces or broken into individual pieces and crushed. Garbage and waste materials are dropped from the opening to the ground floor using a crusher, and then transported and dismantled. For example, when the site is small or the building is high-rise, a tower crane is used as a lifting machine, and the building is dismantled sequentially from the upper floor.

  More specifically, when dismantling an S structure building, steel beams and columns such as H-shaped steel are preliminarily supported by supporting works and plates, and a cutting machine such as a gas burner or a hydraulic excavator is used. The steel member is disassembled by cutting using a dismantling work machine in which the attachment is changed from the bucket to the cutter. Alternatively, when the steel member is cut with a gas burner or the like, the steel member to be cut and disassembled is supported with a lifting machine such as a tower crane, and the remaining steel portion is completely cut and separated in this state. A steel member is suspended on the ground by a lifting machine (see, for example, Patent Document 1).

  On the other hand, when dismantling RC (reinforced concrete) and / or SRC (steel reinforced concrete) buildings, generally, a dismantling machine (crusher) in which the excavator attachment is replaced from a bucket to a breaker is used. Concrete is crushed, and the internal steel frames and reinforcing bars are cut with a cutting machine such as a gas burner, or the attachment is replaced with a cutter and cut.

  However, when an RC or SRC building is crushed or cut using a breaker or cutter, there will be significant noise and vibrations, and dust will be scattered, which will adversely affect the environment in the vicinity and at the work site. Is big. For this reason, depending on the situation around the dismantling site, it may be required to interrupt the work or to shorten the work time. Furthermore, there are cases in which pillars and walls collapse during the dismantling operation, and the RC and SRC dismantling work requires special attention in terms of safety.

  Moreover, in order to fracture | rupture a large sized steel frame member, a large sized dismantling work machine (crusher) is needed. Furthermore, it is often necessary to reinforce the work floor to withstand the weight of this large heavy machine. In this case, for example, the floor is reinforced by temporary support work from the lower floor, and then the target floor is dismantled. I need it. Also, when breaking a large steel frame, the cutter blade of the demolition work machine is often missing, and in the RC and SRC demolition work, attachments are frequently replaced, which is also a high cost. Become.

  On the other hand, the method of cutting | disconnecting concrete, a steel frame, and a reinforcing bar simultaneously using a wire saw (wire saw apparatus), and demolishing building components, such as RC structure, SRC structure beam, a pillar, and a wall, is put into practical use. . In the wire saw device, an endless wire saw is wound around a plurality of pulleys, and the wire saw is sequentially rotated in one direction by driving of a drive pulley. Then, by cutting this rotating wire saw, it is possible to cut and cut RC and SRC building components, and to suppress the generation of noise and vibration, dust scattering, etc. Can proceed.

  In general, when a building component member is cut with a wire saw device, the wire saw is wound around the member to be cut in advance, and the rotating wire saw is cut from the back side of the member. The member is cut while pulling on (while pulling). That is, it is easy to adjust the cutting force of the wire saw at the time of cutting, and it is possible to easily obtain a desired cutting force. To cut off.

JP 2012-1902 A

  However, when the RC or SRC building components are cut and disassembled with the wire saw device of the pulling method, the member to be cut is arranged inside the endless wire saw during the cutting operation. In addition, it is necessary to perform an apparatus installation operation in which a wire saw is wound around a member to be cut and set in advance. And the apparatus installation work around which this wire saw is wound, including the setup change during the work, took a lot of time and labor, which was one factor that deteriorated the work efficiency.

  Moreover, since the member is cut while attracting the wire saw, a reaction force for attracting the wire saw is required. For this reason, for example, a setup such as fixing the main body portion of the wire saw device to a member to be cut with an anchor is necessary, and this setup work is also a factor that deteriorates the work efficiency. Furthermore, the wire saw is cut and cut from the back side of the member to be cut by the operator on the side of the wire saw device operation, so during the setup and work such as cooling water supply and adjustment of the water discharge direction It also takes a lot of effort to adjust.

  Furthermore, when a wire saw is wound around a member to perform a cutting operation, the long wire saw is rotated in an open environment during the cutting operation. For this reason, a great deal of labor is required for measures to ensure the safety of the work, such as securing the stability of the wire saw and requiring measures for regulating the entry and exit of others around the cutting work.

  In addition, when a wire saw is wound around a member to perform cutting work, at least two workers are required, and it is possible to perform cutting work by one worker, which improves work efficiency. From the point of cost reduction, it was desired.

  Furthermore, when transporting and removing the cut block-shaped member with a lifting machine such as a tower crane, it is immediately and easily put on the stake at the stage of cutting (cutting) the member so as to leave a part during the cutting operation. Unlike the S structure, which is completely cut with a cutting machine such as a gas burner, and the members are suspended by a lifting machine, when cutting the RC structure or SRC structure with a wire saw device, the weight of the member is large. Therefore, it is necessary to support the material securely, and it is not possible to adopt a suspension system as in the case of cutting and dismantling the S-shaped member. For this reason, it is necessary to provide a temporary support work separately to support the member to be cut, or to perform the cutting operation in a state where the member to be cut is always suspended and supported from the start of cutting by a crane. . In particular, when the cutting work is performed with the crane always suspended from the start of cutting, the crane stop time becomes long, and the working efficiency is remarkably deteriorated.

  In addition, it is necessary to consider the occurrence of an earthquake at the time of dismantling work, and development of a method for holding a member to be cut reliably and efficiently has been strongly desired.

  In view of the above circumstances, the present invention provides a building dismantling method that enables an RC and / or SRC building to be efficiently dismantled while suppressing generation of noise and vibration and dust scattering. With the goal.

  In order to achieve the above object, the present invention provides the following means.

  The building dismantling method of the present invention is a method of dismantling a building constructed with RC and / or SRC building components, using a wire saw device, and using a wire saw before the building components. The building component is cut by a push-cut method that cuts from the back to the back side, and the building component on the separation side and the building configuration on the non-separation side with a cutting groove formed by cutting the wire saw in between Anchor bolts are fixed to the members, the wire saw is cut to form the cutting grooves, and a plurality of the anchor bolts are inserted into the bolt insertion holes of the fixing plate, and nuts are fastened to fix the fixing plates. The separation-side building component and the non-separation-side building component are detachably connected and held by the fixing plate. That.

  In this invention, a building component on the separation side and a building structure on the non-separation side are formed with a cutting groove formed sequentially by cutting the wire saw into the building component such as a column member or a beam member by a push-cut method. By inserting the anchor bolts fixed to the members through the bolt insertion holes and fastening the nuts, a fixed plate can be installed on the outer surface of the building component. These building components can be temporarily connected and held. Thereby, it is not necessary to hold | maintain the building structural member of cutting object with a crane, and it becomes possible to hold | maintain the building structural member cut and separated in the stable state until conveyance removal.

  Further, in the building dismantling method of the present invention, each of the plurality of bolt insertion holes of the fixed plate is formed in a slit shape with a long hole extending in one direction and opening at one end of the fixed plate. The fixing plate is inserted between the wire saw and the outer surface of the building component in which the cutting groove is formed, and the anchor bolt is inserted into the bolt insertion hole by sliding and moving in the one direction. It is desirable to install a fixed plate.

  In this invention, when the building component is cut by the push-off method using the wire saw device, when there is no sufficient gap between the wire saw of the wire saw device and the outer surface of the building component. The plurality of bolt insertion holes of the fixed plate are each formed in a slit shape with a long hole shape opened at one end of the fixed plate. Thereby, an anchor bolt can be inserted in each bolt insertion hole by inserting a fixed plate into a small gap between the wire saw device and the outer surface of the building component and sliding it in one direction. Therefore, the fixing plate can be installed by fastening the nut to the anchor bolt, and even if there is not a sufficiently large gap between the wire saw and the outer surface of the building component, the fixing plate It is possible to temporarily connect and hold the building component and the non-separable building component.

  Further, in the building dismantling method of the present invention, after the fixing plate is installed, the anchor bolt is inserted into the bolt insertion hole of the reinforcing plate, and the nut is fastened with the reinforcing plate being overlapped with the fixing plate. It is more desirable.

  In the present invention, after the fixing plate is installed, the bolt is further inserted into the anchor plate by being inserted into the anchor bolt so as to overlap the fixing plate, so that the bolt insertion hole is formed in the shape of a long hole and slit in the fixing plate. Even in this case, the reinforcing plate can ensure strength (proof strength), and the separated building component and the non-separated building component can be connected and held with sufficient strength.

  Further, in the building dismantling method of the present invention, the wedge member is driven into the cutting groove that is sequentially formed by cutting the wire saw, and the fixing plate is installed in the state where the wedge member is driven. Is more desirable.

  In this invention, when cutting the building component, the width of the cutting groove can be secured by driving the wedge member into the cutting groove formed on the outer surface of the building component as the wire saw advances. . As a result, it is possible to eliminate the possibility of falling due to the dead weight of the building component members depending on the interval between the cutting grooves (cutting surfaces), pinching the wire saw, and causing breakage or the like in the wire saw during cutting work. It becomes possible to perform cutting work.

  In the building dismantling method of the present invention, a building saw such as a pillar member or a beam member is cut into a wire saw by a push-off method, and a cutting groove formed in sequence is interposed between the building constituent member on the separation side and the non-building member. The building component on the separation side can be temporarily connected and held by the fixing plate. Thereby, it is not necessary to hold | maintain the building structural member of cutting object with a crane, and it becomes possible to hold | maintain the building structural member cut and separated in the stable state until conveyance removal.

  Therefore, by being fixed by the fixing plate, even if an earthquake occurs during the cutting operation, it is possible to prevent the building component on the separation side (building component to be cut) from falling down. Moreover, the building component before being separated by cutting and transported and removed by a crane or the like can also be prevented from falling due to being fixed by the fixing plate.

  In the building dismantling method of the present invention, the building component member to be cut is held in a stable state by being fixed with a fixing plate. Building and / or building components such as SRC pillar members and beam members can be cut and separated. This makes it possible to greatly reduce the amount of noise, vibration, and dust scattering, and a suitable environment in the neighborhood or work site where work interruptions and shortening of work time are not required as in the past. Can be maintained, and the dismantling work can be carried out efficiently and smoothly.

  In addition, it is possible to cut and separate building components such as pillar members and beam members with a push-cut type wire saw device in this way, so that a wire saw is wrapped around the building component to be cut during cutting work compared to the pulling method. Or the work of fixing the main body of the wire saw device to the member with an anchor becomes unnecessary, and the member can be cut efficiently.

  Further, by using a push-cut type wire saw device, it becomes possible for one worker to perform a member cutting operation, and it is possible to further improve the working efficiency and reduce the cost.

  In addition, the long wire saw does not rotate in an open environment during the cutting operation as in the case of the wire saw device of the pulling method, so that the stability of the wire saw can be ensured, and other parts around the cutting operation can be secured. It is also possible to reduce measures for restricting the entry and exit of workers, that is, measures for ensuring work safety.

  Therefore, according to the building dismantling method of the present invention, the RC and / or SRC building can be efficiently dismantled while reliably suppressing the generation of noise and vibration, and the scattering of dust. It can be suitably used for dismantling work in the vicinity of schools, schools, and urban areas.

It is a perspective view which shows the state which has demolished the building by the building demolition method which concerns on one Embodiment of this invention. It is a figure which shows the wire saw apparatus used with the building demolition method which concerns on one Embodiment of this invention. FIG. 3 is a view taken along line X1-X1 in FIG. It is a figure which shows the demolition work machine equipped with the wire saw apparatus used with the building demolition method which concerns on one Embodiment of this invention. In the building demolition method which concerns on one Embodiment of this invention, it is a figure which shows the setting state of a part of floor slab member of the one hierarchy to demolish and remove. In the building demolition method which concerns on one Embodiment of this invention, it is a figure which shows the state which disassembled and removed some floor slab members of the one hierarchy. In the building dismantling method according to an embodiment of the present invention, a part of floor slab members in one layer is dismantled and a part of exposed beam members is dismantled and a part of floor slab members of other parts is dismantled. It is a figure which shows the state which removed. In the building dismantling method according to one embodiment of the present invention, a part of the floor slab member in one layer is dismantled and the exposed part of the column member is dismantled and the other part of the floor slab member is dismantled. It is a figure which shows the state which disassembled and removed the beam member exposed by removing. In the building demolition method which concerns on one Embodiment of this invention, a floor slab member, a beam member, and a column member are demolished one by one, and it is a figure which shows the state which has demolished each hierarchy of a building in order from the upper floor. In the building dismantling method which concerns on one Embodiment of this invention, it is a perspective view which shows the dismantling method of a floor slab member. In the building dismantling method which concerns on one Embodiment of this invention, it is a side view which shows the dismantling method of a floor slab member. In the building demolition method which concerns on one Embodiment of this invention, it is a figure which shows the driving | operation procedure of the wedge member at the time of cut | disconnecting the building structural member of a column member or a beam member with a push-off type wire saw apparatus, and the attachment procedure of a fixed plate . It is a figure which shows the fixed plate used with the building demolition method which concerns on one Embodiment of this invention. It is a figure which shows the state which fixed the pillar member cut and separated by the fixing plate. It is a figure which shows the attachment state of a fixed plate. FIG. 16 is a view taken along line X1-X1 in FIG. 15. It is a figure which shows the state which fixed the beam member cut and separated by the fixing plate. In the building demolition method which concerns on one Embodiment of this invention, it is a figure which shows the state which fixed the pillar member cut-separated with the other fixed plate. It is a figure which shows another fixing plate.

  Hereinafter, a building dismantling method according to an embodiment of the present invention will be described with reference to FIGS. Here, in the present embodiment, the column members (and beam members) of the building components are cut and disassembled using the fixed plate according to the present invention, but not only the building components but also the floor slab members of the entire building, An explanation will be given as a method of dismantling building components such as beam members and column members.

  First, the building to be demolished in the present embodiment is a high-rise building such as an office building, for example, a building column or beam, a building component of a wall or floor (floor slab member, beam member, column member, wall member) Etc.) are constructed by RC and / or SRC. The present invention need not be limited to application to high-rise buildings, and can of course be applied to low-rise buildings.

  In the building dismantling method of this embodiment, the building is appropriately covered with a curing material, and the building is sequentially dismantled from the higher floor (upper floor). In addition, as shown in FIG. 1, for example, a tower crane (lifter) 2 for suspending members disassembled in blocks from the higher floor (upper floor) of the building 1 uses the elevator hall of the building 1 or the like. Standing up. Further, in the present embodiment, a dismantling work place for performing further dismantling / crushing processing (split processing) on the block-shaped member suspended by the tower crane 2 is provided in the land adjacent to the building 1.

  In the building dismantling method of the present embodiment, a wire saw device and a blade cutter device are used as means for cutting and dismantling the building components of the floor slab member 3, the beam member 4, the wall member 5, and the column member 6 of the building 1.

  As shown in FIGS. 2 and 3, the wire saw device 10 according to the present embodiment includes a guide rail 12 projecting linearly from an adapter 11 with a tilt mechanism, and a member to be cut attached to the tip of the guide rail 12. A gripping mechanism 13 for gripping (the column member 6 and the beam member 4) and a wire saw 16 wound endlessly around a plurality of pulleys (sheaves) 14 and 15 are rotated in one direction by the drive drive of the drive pulley 15. And a cutting mechanism 17 that is guided by the guide rail 12 and moves a part of the wire saw 16 forward and backward. In addition, at least some of the pulleys 14 provided on the left and right sides between the guide rails 12 are provided so as to be able to advance and retreat independently along the advancing and retreating direction of the cutting mechanism 17.

  In the present embodiment, as shown in FIG. 4, the wire saw device 10 is replaced with an attachment bucket that is detachably attached to the tip of the arm 18 c of the hydraulic excavator, and the dismantling work machine 18 including the wire saw device 10 is provided. Is configured. Further, the dismantling work machine 18 includes a single operator from the driver's seat, a driving operation of the wire saw device 10, a turning operation of the upper turning body 18a of the dismantling work machine 18, a beam 18b provided on the upper turning body 18a, The arm 18c can be laid down and the lower traveling body 18d can be driven (traveling operation).

  Accordingly, the RC member and the RC member 6 and the column member 6 can be operated by appropriately operating the dismantling work machine 18 by freely operating, turning, and arm / beam up / down operation. Any position of the building component can be efficiently cut with the wire saw 16.

  And in the building demolition method of this embodiment, when the building structural member of the building 1 is cut and demolished, the wire saw device 10 is used as much as possible. Further, when the member is cut using the wire saw device 10, the wire saw 16 is wound around the member, the rotating wire saw 16 is attracted to the front, and the drawing method is not cut into the member from the back side. The rotating wire saw 16 is pressed against the member from the near side and cut, and the cut-off method of sequentially cutting to the back side is used as much as possible.

  In this way, in the building dismantling method of the present embodiment, the wire saw device 10 is used in a cut-off manner for cutting and separating the beam member (large beam) 4 inside the building 1 and the column member 6, and the building 1 For cutting and separating the beam member (large beam with wall) 4 and the wall member (entire wall) 5 at the outer peripheral portion, the staircase, etc., a wire saw device of a pulling type is used. Further, for cutting and separating the floor slab member 3, a blade cutter device (road cutter, wall cutter, plunge cutter, etc.) that cuts and rotates a rotating blade is used, and a push-cut method such as a sleeve wall or a descending wall is used. A blade cutter device is used as a member outside the applicable dimensions of the wire saw device 10.

  That is, in the building dismantling method of this embodiment, in the dismantling work of the high-rise building 1, the most time and labor are required for the dismantling, and the beam member 4 and the column member 6 of the building 1 that requires attention are cut. A push-cut wire saw device 10 is applied to the separation.

  In this way, in order to apply the push-saw type wire saw device 10 for cutting and separating the beam member 4 and the column member 6 of the building, the building dismantling method of the present embodiment is shown in FIGS. 1 and 5 to 9. As described above, some floor slab members 3 which are building components of the upper floor (one level) 20 are disassembled in advance, and the lower floor (the other layer immediately below the first layer 20) is disassembled by dismantling these floor slab members 3. A part of the column members 6 and the beam members 4 which are 21 building components are exposed.

  Then, the dismantling work machine 18 equipped with the wire saw device 10 is disposed on the lower floor 21 and the exposed beam member 4 and the column member 6 are cut by the push-off method by removing the floor slab member 3 in advance. To separate. Further, the beam member 4 and the column member 6 are cut and separated by a push-off method, respectively, and conveyed and removed to the outside by a tower crane (lifter) 2.

  Further, the wall member (large beam with wall and the entire wall) 5 and the staircase are cut and separated by a wire saw device of a pulling method, and sequentially conveyed and removed by the tower crane 2. Further, members outside the applicable dimensions of the push-saw type wire saw device 10 such as a sleeve wall and a descending wall are cut and separated by a blade cutter device and removed.

  In this way, after disassembling the exposed beam member 4, the column member 6 is disassembled, and the floor slab member 3, the beam member 4, the column member 6, etc. are sequentially disassembled and conveyed and removed to the outside, Dismantle in order from the upper floor.

  Here, the dismantling method for every building structural member is demonstrated more concretely.

[Dismantling of floor slab members]
First, a method for disassembling the floor slab member 3 will be described.

  Conventionally, when dismantling an S-structured floor slab member, the floor slab member is suspended and supported by a tower crane 2 or the like, and the small beam steel is finally cut and separated by a gas burner and removed. And since the small beam steel frame of this S-structure floor slab member can be cut in a short time by using a gas burner, it is possible to reduce the waiting time for the crane 2 to suspend and support the floor slab member. There are few efficiency problems.

  On the other hand, in the case of the RC and SRC floor slab members 3 as in the present embodiment, it takes time to cut the beam, so if the cutting work is performed with the crane 2 suspended and supported, the waiting time of the crane 2 Will be very long. In addition, the holding method when there is no beam is also a problem. For this reason, it is necessary to install a temporary support base (support work) on the floor slab member 3 on the lower floor to support the floor slab member 3 to be cut on the upper floor. A lot of labor, time, and cost are required for replacement and installation. Furthermore, as a staking method for lifting the floor slab member 3, conventionally, a method of providing a cored hole in the floor slab member 3 and passing a bolt and a wire is often used. It takes a lot of work.

  On the other hand, in the building dismantling method of the present embodiment, as shown in FIGS. 10 and 11, the floor slab member 3 is held at the time of cutting work, and at the time of lifting (hanging) by the crane 2, A floor slab holding / suspending member 23 for connecting the cable body 22 is attached to the floor slab member 3 to be cut (disassembled).

  The floor slab holding / suspending member 23 of the present embodiment is provided with, for example, a grooved steel 24 having a U-shaped cross section, and a pair of side wall portions 24a and a bottom plate portion 24b of the grooved steel 24 connected at the ends. And a suspension plate 25 through which a suspension hole 25a for hanging is formed. A bolt insertion hole 24 c is formed through the bottom plate portion 24 b of the channel steel 24. The floor slab holding / suspending member 23 has a desired strength, and the shape is not particularly limited as long as it has the suspension hole 25a and the bolt insertion hole 24c (each at a predetermined position).

  The floor slab holding / suspending member 23 formed in this way attaches a mounting bolt (anchor bolt) 26 to the floor slab member 3 to be cut with a chemical anchor, a hole-in anchor, or the like, and passes the mounting bolt 26 through the bolt. The nut is fixed on the floor slab member 3 by inserting the nut into the hole 24c and fastening the nut. At this time, when the hole for attaching the mounting bolt 26 is drilled in the floor slab member 3, the mounting hole may be formed through the floor slab member 3. By inserting the mounting bolt 26 and fixing the lower end side of the mounting bolt 26 using a fixing plate and a nut provided on the lower surface side of the floor slab member 3, the floor slab holding / suspending member 23 is fixed to the floor slab member 3. Can be detachably attached.

  Then, the floor slab member 3 is started to be cut by a blade cutter device that cuts a member by cutting a rotating blade such as a wall saw, road cutter, plunge cutter or the like. The suspension member 23 is attached. At this time, as shown in FIG. 11, the floor slab holding / suspending member 23 is installed across the cutting line 27. Thereby, in a state where the floor slab member 3 is separated by cutting, a plurality of floor slab holding / suspending members 23 appropriately disposed at predetermined positions are arranged on the opposite non-separation side across the cutting line 27. It is locked so as to be caught by the member. For this reason, the floor slab member 3 is supported by the plurality of floor slab holding / suspending members 23 and held in a separated state.

  Therefore, it is not necessary to provide a temporary support frame on the floor slab member 3 on the lower floor as in the prior art, and an inexpensive floor slab holding / suspending member 23 is easily attached to the floor slab member 3. The floor slab member 3 that has been cut and separated can be reliably held.

  Further, the rope 22 such as a wire rope can be easily attached to the crane 2 by laying it in the suspension hole 25a of the floor slab holding / suspending member 23 attached to the floor slab member 3 that has been cut and separated. Thus, the floor slab member 3 can be lifted and easily removed.

  Furthermore, when the floor slab member 3 is suspended from the demolition work site by the crane 2, the floor slab holding / suspending member 23 can be removed from the floor slab member 3 by a simple operation of removing the nut. Therefore, the floor slab member 3 can be cut and separated and conveyed and removed while diverting the floor slab holding / suspending member 23.

  On the other hand, a plurality of floor slab holding / suspending members 23 may be attached to predetermined positions of the floor slab member 3 in advance. In this case, for example, as shown in FIGS. 10 and 11, the floor slab holding / suspending member 23 is configured to be rotatable around the axis O1 of the mounting bolt 26. The floor slab holding / suspending member 23 is rotated to adjust its direction so as to be arranged on the floor slab member 3 to be cut. Then, cutting is started by the blade cutter device, and the floor slab holding / suspending member 23 is sequentially rotated from the position where the cutting is completed, and the direction is changed so as to cross the cutting line 27.

Thus, in the same manner as described above, in the state where the floor slab member 3 is separated by cutting, a plurality of floor slab holding / suspending members 23 appropriately disposed at predetermined locations are opposite to each other across the cutting line 27. The floor slab member 3 that has been cut and separated is held by these floor slab holding / suspending members 23. Therefore, even in the case of such a configuration, similarly to the above, it is unnecessary to provide and support a temporary support frame on the floor slab member 3 on the lower floor as in the prior art, and the floor slab member 3 is cut and separated. can do. Further, the rope 22 such as a wire rope can be easily attached to the crane 2 by laying it in the suspension hole 25a of the floor slab holding / suspending member 23 attached to the floor slab member 3 that has been cut and separated. Thus, the floor slab member 3 can be lifted and easily removed.
In addition, the floor slab holding / suspending member 23 and the non-separation side member are detachably fixed using bolts or the like in a state where the floor slab holding / suspending member 23 is disposed across the cutting line 27. You may make it do. In this case, when the cut and separated floor slab member 3 is transported and removed by the crane 2, the joining state of the floor slab holding / suspending member 23 and the non-separating member is released. Since the floor slab holding / suspending member 23 and the non-separation side member are fixed, the floor slab member 3 cut and separated in a more stable state can be held.

[Disassembly of column members and beam members]
Next, a method for disassembling the column member 6 and the beam member 4 will be described.

  Here, conventionally, when dismantling S-structured column members and beam members (large beams, large beams with walls), a gas burner is used to cut the column members and beam members in a way that leaves part of them. At the stage of leaving a part, it is supported by hanging by the crane 2, and finally the remaining part is completely cut by a gas burner to separate the column member and the beam member, and the crane 2 is transported and removed. Accordingly, it is not necessary to suspend and support the crane 2 at all times, and since the steel frame can be cut in a short time by the gas burner, the waiting time of the crane 2 can be shortened, and an S-structured column can be efficiently made. Dismantling work of members and beam members can be performed.

  On the other hand, when the RC or SRC column member 6 or beam member 4 is disassembled, the cutting cannot be performed as easily as in the case of the S structure. Thus, even when the remaining portion is left and supported by two cranes and the remaining portion is finally cut, the waiting time of the crane 2 becomes longer. Moreover, since the column member 6 and the beam member 4 of RC structure and SRC structure are heavier than S structure, especially the column member 6 is heavy, so it is necessary to hold it securely during the cutting operation. Furthermore, it is necessary to consider that an earthquake occurs during cutting.

  On the other hand, first, in the building dismantling method of the present embodiment, as shown in FIG. 12, for the column member 6 and the beam member 4 (hereinafter referred to as building component members 4 and 6), FIG. The operator operates the dismantling work machine 18 by one person so as to press the wire saw 16 shown in FIG. 4B, and the wire saw 16 is cut into the building components 4 and 6 by the push-off method, and the building components 4 and 6 are cut. To do.

  Furthermore, when the building components 4 and 6 are cut and separated by the push-saw type wire saw device 10 as described above, the building components 4 and 6 are tilted by the weight of the building components 4 and 6 as the cutting progresses. In this case, the wedge member 30 is used.

  Furthermore, in order to hold | maintain the building structural members 4 and 6 of the cutting object after a cutting | disconnection in the middle of a cutting | disconnection, the fixed plate 31 is used.

  More specifically, in the building dismantling method of the present embodiment, when the building component members 4 and 6 are cut, the wire saw 16 is formed on the outer surface (side surface) of the building component members 4 and 6 as the wire saw 16 advances. The wedge member 30 is driven into the cutting groove 27 to ensure the width of the cutting groove 27.

  Further, as the wire saw 16 advances, the separation-side building component 4, 6 and the non-separation-side building component 4, between the cutting grooves 27 formed on the outer surfaces (side surfaces) of the building component 4, 6, The fixed plate 31 is installed so that 6 may be connected.

  That is, as shown to Fig.12 (a), the wire saw 16 is cut from the near side of the building structural members 4 and 6, and the building structural members 4 and 6 are cut by a push-off method. 12B, the cutting is temporarily stopped at the stroke end of the wire saw device 10 (cutting mechanism 17), and the wedge member 30 is driven into the formed cutting groove 27 during this time. Furthermore, the fixed plate 31 is installed.

  Here, as shown in FIGS. 13 to 17, for example, the fixed plate 31 of the present embodiment is formed in a rectangular flat plate shape using, for example, a steel plate having a thickness of about 9 mm. In addition, a plurality of bolt insertion holes 32 (see FIG. 13) are formed through the fixing plate 31 at predetermined positions.

  And in the building dismantling method of this embodiment, as shown in FIG.12 (b) and FIG.13, while cutting progresses, the wedge member 30 is driven in order and formed in the outer surface of the building structural members 4 and 6. Anchor bolts 33 such as chemical anchors are arranged in the direction of the material axis on the building component members 4 and 6 on the separation side and the building component members 4 and 6 on the non-separation side with the cutting groove (cutting line) 27 interposed therebetween. A plurality are driven in a predetermined position along the material axis direction with a predetermined interval. Then, during the cutting operation, the fixing plate 31 provided with the bolt insertion holes 32 according to the interval between the plurality of anchor bolts 33 is set so that the anchor bolts 33 are inserted into the bolt insertion holes 32 and straddle the cutting grooves 27, Fasten with nuts.

  Further, as shown in FIG. 12 (c), the cutting operation is temporarily stopped again before the building components 4 and 6 are completely cut, and the newly formed cutting groove 27 is wedged. The member 30 is driven and the fixed plate 31 is installed. Further, as shown in FIG. 12 (d), at the stage where the building components 4 and 6 are completely cut, the wedge member 30 is further driven and the fixing plate 31 is installed.

  The timing at which the cutting work is stopped and the wedge member 30 and the fixing plate 31 are installed may be performed using, for example, the main bar where the wire saw 16 is located at a predetermined position of the building components 4 and 6 as a guide. That is, for example, when the wire saw 16 hits a main muscle that is determined to have a significant decrease in yield strength when cut, the cutting operation is stopped, and the wedge member 30 and the fixing plate 31 are installed before the main bar is cut. do it.

  By sequentially driving the wedge member 30 into the cutting groove 24 in this manner, the building component members 4 and 6 are not inclined due to their own weight with the progress of cutting, and the cutting work can be smoothly performed. It is possible to proceed and to prevent the wire saw 16 from being damaged.

  In addition, during the cutting, the fixed plate 31 is installed at any time on the building components 4 and 6 to be cut, and the separation-side building components 4 and 6 and the non-separation-side building components 4 and 6 are fixed plates. 31 are connected. Thereby, for example, even if an earthquake occurs during the cutting operation or before the building components 4 and 6 that have been cut and separated are transported and removed, the building components 4 and 6 that have been cut and separated may fall or fall. Is prevented.

  When the building components 4 and 6 that have been cut and separated are transported and removed by the crane 2 or the like, the wire rope or the like of the crane 2 is connected to the building components 4 and 6 and supported in a suspended state. The plate 31 may be removed.

  Here, in the fixing plate 31 in which there is no sufficient gap between the wire saw device 10 (wire saw 16) and the outer surfaces of the building components 4 and 6 and the circular bolt insertion holes 32 are formed through the bolt insertion holes. In some cases, the anchor bolt 33 cannot be inserted into the shaft 32 and cannot be installed.

  In this case, as shown in FIGS. 18 and 19, each of the plurality of bolt insertion holes 35 extends in one direction and opens into one side end (one end) of the fixing plate 34 in a slit shape. The formed fixing plate 34 may be used. Accordingly, the fixing plate 34 is inserted into a small gap between the wire saw device 10 and the outer surfaces of the building components 4 and 6, and the fixing plate 34 is slid in one direction, whereby the anchor bolts are inserted into the bolt insertion holes 35. 33 can be inserted, and the fixing plate 34 can be installed by fastening the nut.

  Further, as shown in FIG. 19, it is preferable to install a reinforcing plate 37 having a bolt insertion hole 36 formed therethrough together with the fixing plate 34. The reinforcing plate 37 is installed by inserting the anchor bolt 33 through the bolt insertion hole 36, overlapping the fixing plate 34, and fastening a nut. Thereby, even if the bolt insertion hole 35 of the fixing plate 34 is formed in the shape of a long hole, by providing the reinforcing plate 37, the building component members 4 and 6 on the separation side and the building component members 4 and 6 on the non-separation side are provided. Can be firmly connected.

  Therefore, in the building dismantling method according to the present embodiment, separation is performed with the cutting grooves 27 sequentially formed by cutting the wire saw 16 in a building-cutting member such as the column member 6 and the beam member 4 by a push-off method. The building components 4 and 6 and the building components 4 and 6 on the non-separable side are respectively inserted into the bolt insertion holes 32 and 35, and the nuts are fastened. The fixed plates 31 and 34 can be installed on the outer surface of the, 6, and the separated building component members 4 and 6 and the non-separated building component members 4 and 6 are temporarily connected and held by the fixed plates 31 and 34. It becomes possible. Thereby, it is not necessary to hold | maintain the building structural members 4 and 6 to be cut with the crane 2, and it becomes possible to hold | maintain the building structural members 4 and 6 which were cut-separated in the stable state until conveyance removal. .

  Therefore, by being fixed by the fixing plates 31 and 34, even if an earthquake occurs during the cutting operation, it is possible to prevent the building component members 4 and 6 on the separation side from falling down. Further, the building components 4 and 6 before being cut and separated and transported and removed by the crane 2 or the like can also be prevented from falling due to being fixed by the fixing plates 31 and 34.

  Moreover, in the building dismantling method of the present embodiment, the building component members 4 and 6 to be cut are fixed in a stable state by being fixed by the fixing plates 31 and 34. Building structural members such as RC and / or SRC column members 6 and beam members 4 which are main structural members of the building can be cut and separated. This makes it possible to greatly reduce the amount of noise, vibration, and dust scattering, and a suitable environment in the neighborhood or work site where work interruptions and shortening of work time are not required as in the past. Can be maintained, and the dismantling work can be carried out efficiently and smoothly.

  Further, since the building components such as the column member 6 and the beam member 4 can be cut and separated by the push-saw type wire saw device 10 in this way, the building components 4 and 6 to be cut at the time of cutting work are compared with the drawing method. A setup work such as wrapping the wire saw 16 around the wire saw 16 or fixing the main body portion of the wire saw device 10 to the member with an anchor becomes unnecessary, and the member can be cut efficiently.

  In addition, by using the push-saw type wire saw device 10, it becomes possible for one operator to perform the cutting operation of the member, and it becomes possible to further improve the work efficiency and reduce the cost.

  Furthermore, unlike the wire saw device of the pulling method, since the long wire saw does not rotate in an open environment at the time of cutting work, the stability of the wire saw 16 can be secured, It is also possible to reduce measures for restricting access to others, that is, measures for ensuring work safety.

  Therefore, according to the building dismantling method of the present embodiment, the RC and / or SRC building 1 can be efficiently dismantled while reliably suppressing the generation of noise and vibration, and the scattering of dust. It can be suitably used for dismantling work in hospitals, schools, and urban areas.

  Moreover, in the building dismantling method of this embodiment, when cutting the building structural members 4 and 6 by the push-off method using the wire saw device 10, the wire saw 16 and the building structural member 4 of the wire saw device 10, When there is no sufficiently large gap between the outer surface of the fixing plate 34, the plurality of bolt insertion holes 35 of the fixing plate 34 are each formed in a slit shape with a long hole opening at one end of the fixing plate 34. . Thereby, the anchor plate 33 is inserted into each bolt insertion hole 35 by inserting the fixing plate 34 into a small gap between the wire saw device 10 and the outer surface of the building component 4, 6 and sliding it in one direction. Can do. Therefore, the fixing plate 34 can be installed by fastening the nut to the anchor bolt 33, and there is no sufficient gap between the wire saw 16 and the outer surface of the building components 4, 6. The fixed plate 34 makes it possible to temporarily connect and hold the building components 4 and 6 on the separation side and the building components 4 and 6 on the non-separation side.

  Furthermore, after the fixing plate 34 is installed, the bolts are inserted into the anchor bolts 33 and the reinforcing plate 37 is placed on the fixing plate 34 so as to form the bolt insertion holes 35 in the shape of long holes and slits in the fixing plate 34. However, the reinforcing plate 37 can ensure the strength (proof strength) and can hold the separated building component members 4 and 6 and the non-separated building component members 4 and 6 with sufficient strength. become.

  Further, when cutting the building component members 4 and 6, the wedge members 30 are driven into the cutting grooves 27 formed on the outer surfaces of the building component members 4 and 6 as the wire saw 16 advances, so that the cutting grooves 27 A width can be secured. As a result, the weight of the building component members 4 and 6 causes a fall depending on the interval between the cutting grooves (cutting surfaces) 27, pinching the wire saw 16, and eliminating the possibility that the wire saw 16 breaks during the cutting operation. This makes it possible to perform cutting work efficiently.

  As mentioned above, although one Embodiment of the building demolition method concerning this invention was described, this invention is not limited to said one Embodiment, In the range which does not deviate from the meaning, it can change suitably.

1 Building 2 Tower crane (lifter)
3 Floor slab members (building components)
4 Beam members (building components)
5 Wall members (building components)
5a Falling wall 5b Waist wall 6 Column member (building component)
DESCRIPTION OF SYMBOLS 10 Wire saw apparatus 11 Adapter 12 with a tilt mechanism Guide rail 13 Grip mechanism 14 Pulley 15 Pulley (drive pulley)
16 Wire saw 17 Cutting mechanism 18 Demolition work machine 18a Upper turning body 18b Beam 18c Arm 18d Lower traveling body 20 Upper floor (one level)
21 Lower floor (other levels)
22 Cable body 23 Floor slab holding / suspending member 24 Channel steel 24a Side wall 24b Bottom plate 24c Bolt insertion hole 25 Suspension plate 25a Suspension hole 26 Mounting bolt (anchor bolt)
27 Cutting line (cutting groove)
30 Wedge member 31 Fixing plate 32 Bolt insertion hole 33 Anchor bolt 34 Fixing plate 35 Bolt insertion hole 36 Bolt insertion hole 37 Reinforcement plate T1 Horizontal direction T2 Vertical direction

Claims (4)

A method of dismantling a building built with RC and / or SRC building components,
Using a wire saw device, the building component is cut by a push-cut method in which a wire saw is cut from the front of the building component to the back side,
Anchor bolts are respectively fixed to the building component on the separation side and the building component on the non-separation side with a cutting groove formed by cutting the wire saw,
The wire saw is cut to form the cutting groove, and a plurality of the anchor bolts are inserted into the bolt insertion holes of the fixing plate, and nuts are fastened to install the fixing plate. A building dismantling method, wherein a building constituent member and a non-separable building constituent member are detachably connected and held. The building demolition method according to claim 1,
Each of the plurality of bolt insertion holes of the fixing plate is formed in a slit shape in a long hole shape extending in one direction and opening at one end portion of the fixing plate,
The fixing plate is inserted between the wire saw and the outer surface of the building component in which the cutting groove is formed, and the anchor bolt is inserted through the bolt insertion hole by sliding in the one direction, and the fixing. A method of demolishing a building, characterized by installing a plate. In the building demolition method according to claim 2,
After the fixing plate is installed, the anchor bolt is inserted into the bolt insertion hole of the reinforcing plate, and the nut is tightened in a state where the reinforcing plate is superimposed on the fixing plate. In the demolition method of the building as described in any one of Claims 1-3,
A method for demolishing a building, wherein a wedge member is driven into the cutting grooves sequentially formed by cutting the wire saw, and the fixing plate is installed in the state where the wedge member is driven.