JP2010121394A - Gondola for demolishing tower-like structure and method for demolishing tower structure using the gondola - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gondola and method for demolishing a tower-like structure which can easily cope with a shape of the tower-like structure and enable safe demolishing work. <P>SOLUTION: A truncated cone-shaped smokestack 100 is demolished by: a gondola installing process (step s3) where a smokestack-demolishing gondola 1 equipped with a work corridor 30 having a ring shape in a plane view for cutting the smokestack 100 and a locking frame 10 locked from the top 103 of the smokestack 100 to hang and support the work corridor 30 is hung by a crawler crane 300 and installed on the outer periphery of the smokestack 100 in the vicinity of a cutting line 110; a sling replacement process (step s7) for replacing a sling wire 310 to the smokestack 100 above the cutting line 110; a cutting process (step s9) for cutting the smokestack 100 along the cutting line 110; and a hanging and lowering process (step s12) for hanging the cut smokestack 120 together with the gondola 1 and lowering it to the ground by the crawler crane 300. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a gondola and a dismantling method for safely performing a dismantling operation for dismantling a tower-like structure such as a chimney, for example.

  The dismantling of tower-like structures such as chimneys is relatively tall compared to the dismantling of ordinary buildings that can be collapsed inside the plane of the occupied space, and the surrounding structures are close. This is often difficult due to various restrictions such as, and many dismantling methods have been proposed so far.

  For example, a tower body dismantling unit described in Patent Document 1 includes a ring in a plan view arranged on the outer peripheral side of a tower body to be disassembled, a fixed bracket, a movable bracket movable in the vertical direction, and the movable bracket. It is composed of driving means for driving, and the movable bracket and the fixed bracket are alternately deposited in the tower body, and the tower body demolition unit is lifted up and down along with the dismantling work from the inside of the frame.

However, in the case of the above-mentioned Patent Document 1, since a complicated structure such as a movable bracket and a driving means is required, it is necessary to renovate the tower body dismantling unit on a large scale whenever the tower structure to be disassembled changes. Because of the cost and time required for refurbishment, the users were not satisfied.
JP 2000-145126 A

  Therefore, an object of the present invention is to provide a tower-shaped structure dismantling gondola that can easily correspond to the shape of the tower-shaped structure and can be safely dismantled, and a tower-shaped structure dismantling method.

This invention is arranged on the outer periphery of a tower-like structure, and has a ring-shaped work stage in plan view that constitutes a work space capable of cutting work for cutting the tower-like structure in a cross-sectional direction, and the top of the tower-like structure A tower-like structure dismantling gondola comprising: a locking frame that holds the work stage in a suspended manner; and a position restricting means that restricts the locking position of the locking frame with respect to the tower-like structure. It is characterized by that.
The tower-like structure includes a chimney having a truncated cone shape or a substantially prismatic shape.

Thereby, in a state where the locking position is regulated by the position regulating means, the work capable of cutting work for cutting the tower-like structure in the cross-sectional direction by latching the latching frame on the top of the tower-like structure. The space can be arranged in a ring shape in plan view at an appropriate position on the outer periphery of the tower-like structure.
Therefore, the worker can safely and easily cut and dismantle the tower-like structure in the cross-sectional direction from the tower-like structure dismantling gondola.

As an aspect of the present invention, the position restricting means may be configured by an adjustable position restricting means that attaches the position in the radial direction with respect to the locking frame so as to be adjustable, and restricts the position along the peripheral surface of the tower-like structure. it can.
The said radial direction means that it is a radial direction of the work stage comprised in planar view ring shape.

  The adjustable position restricting means is fixed to a locking frame that is locked to the top of the tower-like structure, and is provided in a plurality in the circumferential direction, with respect to the inner or outer peripheral surface of the top of the tower-like structure. It is a position control means which controls the latching position of the said latching frame with respect to the top part of the said tower-like structure by contacting.

  This facilitates the radial position of the adjustable position restricting means relative to the locking frame so that the tower-shaped structure dismantling gondola is arranged at an appropriate position even at the top of various shapes and diameters. Can be adjusted. Therefore, even if it is a tower-shaped structure which has the top part of any shape by simple adjustment work, since a tower-shaped structure dismantling gondola can be latched safely, a user's satisfaction can be improved.

  In particular, in the case of a frustum-shaped tower structure in which the top diameter of the remaining cutting structure, which is a tower-like structure remaining as an undisassembled part, gradually increases as the dismantling proceeds, the remaining cutting structure is easily obtained. Since the position of the position restricting means relative to the top of the object can be easily adjusted, the convenience for the user is improved.

Further, as an aspect of the present invention, a gap curing means for closing a gap between the inner periphery of the floor of the work stage and the outer periphery of the boarding structure can be provided.
As a result, it is possible to prevent accidents caused by falling accidents from the gaps generated on the floor portion of the work stage and dropping of objects, and safe disassembly work can be performed. In particular, even a frustum-shaped tower structure whose diameter increases as dismantling progresses, the gap between the inner periphery of the floor portion and the outer periphery of the boarding structure can be closed. Satisfaction can be improved.

As an aspect of the present invention, the floor portion of the work stage can be configured with a position adjustment floor capable of adjusting the installation position in the radial direction.
Thereby, since the work stage according to the diameter of the tower-like structure to be dismantled can be set, it is possible to work safely. In particular, even in the case of a frustum-shaped tower structure whose diameter increases as the dismantling progresses, the work stage can be easily set according to the diameter of the boarding structure, so that the satisfaction of the user is improved. Can be improved.

  Further, as an aspect of the present invention, the work stage is configured to allow cutting work by a wet cutting means for cutting the tower-like structure in a cross-sectional direction, and is installed below the cut portion of the tower-like structure. The cutting water drop preventing means for preventing the cutting water from dropping can be provided, and the cutting water drop preventing means can be attached in close contact with the outer peripheral surface below the cut portion of the tower-like structure.

The wet cutting means includes a wet wire saw, a wall saw and the like.
Thereby, it can cut | disconnect with the wet cutting means with little scattering of the cutting powder of a tower-like structure, and the fall of the cutting water from the tower-like structure dismantling gondola of the sky can be prevented. Moreover, the amount of cutting water used in the tower-like structure dismantling gondola in the sky can be reduced by collecting and reusing the cutting water by the cutting water fall prevention means.

  Further, the present invention provides a ring-shaped work stage in plan view that constitutes a work space capable of cutting work for cutting the tower-like structure in the cross-sectional direction from the outer peripheral side of the tower-like structure, and the top of the tower-like structure A tower-shaped structure dismantling gondola comprising: a locking frame that holds and supports the work stage in a suspended manner; and a position restricting means that regulates a locking position of the locking frame with respect to the tower-shaped structure. Lifting by the lifting means, locking the locking frame to the top of the tower-like structure while regulating the locking position by the position-regulating means, and the work stage on the outer periphery of the tower-like structure near the cutting position A stage installation step for installing the lifting means, a lifting means refilling step for replacing the lifting means from the tower-like structure dismantling gondola to a structure to be cut that is a tower-like structure above the cutting location, and the work stage. Equipment A cutting step of cutting the tower-like structure in a cross-sectional direction with the cutting means, and the structure to be cut with the tower-like structure dismantling gondola locked at the top by the lifting means. It is a demolition method for a tower-like structure having a hanging process in which a demolition gondola is hung on the ground.

  The lifting means includes means capable of lifting the tower-like structure dismantling gondola via a sling wire or sling such as a crawler crane, a rough terrain crane, or a helicopter.

  As a result, the tower-shaped structure dismantling gondola is lifted by the lifting means, the locking frame is locked to the top of the tower-shaped structure while the locking position is controlled by the position-controlling means, and the tower-shaped structure is cross-sectioned. Install the tower structure dismantling gondola so that the work stage that can be cut in the direction is located on the outer periphery side of the tower structure, and after installing the gondola, with the lifting means replaced with the tower structure The tower-like structure can be cut with a cutting means, and the structure to be cut above the cutting position by the cutting means is suspended on the ground together with the tower-like structure dismantling gondola to safely dismantle the tower-like structure. it can.

  In addition, in the lifting means replacement process before the cutting process after the stage installation process, the lifting means is replaced from the tower structure dismantling gondola to the structure to be cut that is a tower structure above the cutting position. Therefore, the structure to be cut, to which the tower-like structure dismantling gondola is locked, is prevented from inadvertently falling during dismantling.

  In addition, since the structure to be cut is suspended on the ground in the suspension process, it is possible to perform the subdivision work on the ground to make the work to be dismantled and transportable. The work efficiency is good, and further, there is no danger such as dropping of a small piece of disposal, and it can be safely disassembled.

  As an aspect of the present invention, the stage setting step, the lifting means replacement step, the cutting step, and the hanging step are set as a series of partial decomposition cycle, and the partial decomposition cycle is repeated a plurality of times, and the second and subsequent partial decomposition cycles In the stage installation step, the locking frame can be locked to the top of the remaining cutting structure below the cutting position of the boarding structure cut in the cutting step in the immediately preceding partial disassembly cycle.

Thereby, the tower-like structure which is a demolition object can be disassembled by repeating a series of partial decomposition cycle several times.
In addition, by making a series of steps into a cycle, the work efficiency can be increased by repetition, and the disassembly efficiency can be improved safely.

Also, as an aspect of the present invention, in the hanging step, the structure to be cut is slightly lifted, and a bottom covering that covers the bottom from the gap between the top of the uncut structure and the bottom of the structure to be cut A bottom covering step of inserting means and covering the bottom with the bottom covering means may be provided.
The bottom covering means includes a covering means that can wrap and carry heavy objects such as wire mocco.

  Thereby, it is possible to prevent an object from being accidentally dropped from the bottom of the structure to be cut when the structure to be cut is suspended. In particular, in the case of a frustoconical chimney with a double structure with a brick-stacked cylinder inside, there is a possibility that the inner brick will fall when the structure to be cut is lifted in the hanging-down process, Since the bottom portion of the structure to be cut is covered with the bottom portion covering means, the brick can be prevented from falling, which is safe.

  Further, as an aspect of the present invention, at the latest, before the completion of the cutting in the cutting step, the outer periphery of the top of the remaining cutting structure or the outer periphery of the bottom of the structure to be cut protrudes to the other side so as to straddle the cutting portion. A horizontal movement restriction means installation step for installing a horizontal movement restriction means, and in the suspension step, after the cutting step, the lifting center of gravity when the structure to be cut is lifted by the lifting means, A lifting center-of-gravity adjustment step can be provided in a state where the horizontal movement of the structure to be cut is restricted by the direction movement restriction means.

  As a result, the structure to be cut to which the lifting tension is applied in a state where the lifting center of gravity of the lifting means is shifted is cut off from the remaining cutting structure and moved in the direction of the lifting center of gravity upon completion of cutting in the cutting step. Even in this case, since the horizontal movement of the structure to be cut is restricted by the horizontal movement restricting means, in this state, the lifting center of gravity by the lifting means can be adjusted, and it is safely lifted by the lifting means. A suspension process can be performed.

  In addition, as an aspect of the present invention, before the refilling step, it has a horizontal through hole installation step of providing a horizontal through hole penetrating in the horizontal direction in the vicinity of the cutting portion of the boarding structure. The lifting means can be replaced with the horizontal through-hole on the structure to be cut side, and the cutting position in the cutting step can be set to a position crossing the horizontal through-hole.

  As a result, the lower half of the horizontal through hole provided in the immediately preceding partial decomposition cycle remains at the top of the structure to be cut in the main decomposition cycle, and the upper half of the horizontal through hole provided in the main decomposition cycle is The structure to be cut can be cut so as to be the bottom of the structure to be cut.

  In addition, since the lifting means is replaced by a horizontal through hole whose upper half is the bottom of the structure to be cut, the structure to be cut can be lifted from the bottom of the structure to be cut. It is brittle and can be prevented from being destroyed by a lifting load.

  In addition, when a slinging wire or nylon sling, which is a lifting jig for the lifting means, is used, the lifting jig serving as the bottom of the structure to be cut can be locked to the upper half of the horizontal through hole. It is possible to prevent the latching position from being shifted in the circumferential direction and the lifted gravity center from being shifted and dropped.

  Furthermore, when the lifting jig is loaded with the lifting tension, the lifting jig is locked to the lower half of the horizontal through hole at the top of the structure to be cut, so that the locking position is shifted in the circumferential direction. It is possible to more reliably prevent the lifted center of gravity from shifting and falling.

  Further, as an aspect of the present invention, the position restricting means is configured by an adjustable position restricting means that attaches the position in the radial direction with respect to the locking frame so as to be adjustable, and restricts the position along the peripheral surface of the tower-like structure. Before the stage installation step, the adjustable position restricting means is a position restricting means that adjusts the radial position with respect to the locking frame according to the top of the tower-like structure that locks the locking frame. An adjustment step can be included.

  This facilitates the radial position of the adjustable position restricting means with respect to the locking frame so that the tower structure dismantling gondola is locked at an appropriate position even at the top of various shapes and diameters. Can be adjusted. Therefore, a tower-like structure having any shape of the top can be accommodated by a small-scale adjustment operation, so that user satisfaction can be improved.

  In particular, in the case of a frustum-shaped tower structure in which the diameter of the remaining cutting structure gradually increases as the dismantling progresses, the position of the position regulating means relative to the top of the remaining cutting structure can be easily adjusted. Convenience for the person is improved.

  Further, as an aspect of the present invention, it comprises a gap curing means for closing a gap between the inner periphery of the floor of the work stage and the outer periphery of the boarding structure, and after the stage installation step, with the gap curing means, A clearance curing process for closing a clearance between the inner periphery of the floor portion and the outer periphery of the boarding structure can be provided.

  As a result, it is possible to prevent accidents caused by falling disasters and falling objects, and it is possible to dismantle safely. In particular, even a frustum-shaped tower structure whose diameter increases as dismantling progresses, the gap between the inner periphery of the floor portion and the outer periphery of the boarding structure can be closed. Satisfaction can be improved.

  Further, as an aspect of the present invention, a floor portion of the work stage is configured with a position adjustment floor capable of adjusting a radial installation position, and the boarding structure for installing the work stage is installed before the stage installation process. A floor adjustment step of adjusting a radial installation position of the position adjustment floor according to the outer periphery can be provided.

  Thereby, since the work stage according to the diameter of the tower-like structure to be dismantled can be set, it is possible to work safely. In particular, even in the case of a frustum-shaped tower structure whose diameter increases as the dismantling progresses, the work stage can be easily set according to the diameter of the boarding structure, so that the satisfaction of the user is improved. Can be improved.

  According to the present invention, it is possible to provide a tower-like structure dismantling gondola that can easily correspond to the shape of the tower-like structure and can be safely dismantled, and a tower-like structure dismantling method.

An embodiment of the present invention will be described below in detail with reference to the drawings.
First, the chimney dismantling gondola 1 of the present invention will be described with reference to FIGS.
1 shows a perspective view of the chimney demolition gondola 1, FIG. 2 shows a perspective view of the chimney demolition gondola 1 set on the truncated cone chimney 100 to be disassembled, and FIG. 3 shows an upper chimney 101 of the truncated cone chimney 100 to be disassembled. FIG. 4 shows a side sectional view of the chimney demolition gondola 1 set to (101a, 101b), and FIG. 4 shows the chimney demolition gondola 1 set to the lower chimney 102 (102a, 102b) of the truncated cone chimney 100 to be disassembled. FIG. 5 shows an explanatory view of the work corridor 30 of the chimney demolition gondola 1, and FIG. 6 shows an explanatory view of the structure of the work corridor 30.

  1 and 3, the grating 34 and the curing plate 36 are omitted. 5A shows a plan view of the inner corridor 30a in the upper chimney 101, and FIG. 5B shows a plan view of the outer corridor 30b in the lower chimney 102. More specifically, the left half of FIG. 5A shows the inner corridor 30a in the upper part 101a of the upper chimney 101, and the right half shows the inner corridor 30a in the middle part 101b of the upper chimney 101.

  Similarly, the left half of FIG. 5B shows the outer corridor 30b in the upper part 102a of the lower chimney 102, and the right half shows the outer corridor 30b in the middle part 102b of the lower chimney 102.

  The chimney demolition gondola 1 includes an octagonal locking frame 10 having a plan view cross-shaped roof stage 50 on its upper surface and an octagonal work corridor 30 having a plan view disposed inside the locking frame 10 in a plan view. And a supporting pipe 20 that suspends and supports the work corridor 30 from the locking frame 10, and a position regulating member 40 disposed on the back side of the locking frame 10.

  The locking frame 10 includes a diagonal member 11 in a radial direction, that is, a radial direction that connects the center and each vertex of the octagonal shape in plan view, and an outer octagonal frame 12 in plan view that forms the outer shape of the locking frame 10. The inner octagonal frame 13 has a similar inner octagonal frame 13 inside the outer octagonal frame 12. The diagonal member 11, the outer octagon frame 12, and the inner octagon frame 13 are configured by combining H-shaped steel, I-shaped steel, C-type channel steel, L-shaped angle, and the like.

  The working corridor 30 is configured in the same direction as the diagonal member 11 of the locking frame 10 and an oblique member 31 formed with a predetermined length from each vertex of the octagonal shape in plan view toward the center, and the outer shape of the working corridor 30 An outer octagonal frame 32 having a plan view, a similar inner octagonal frame 33 inside the outer octagonal frame 32, a grating 34, three overhanging frames 35 fixed to the upper surface of the grating 34, and a grating The curing plate 36 closes the gap between the inner peripheral side 34 and the outer periphery of the frustoconical chimney 100.

The diagonal member 31 is composed of two C-type channel members with their backs facing each other.
The grating 34 is disposed across the upper surfaces of the diagonal member 31, the outer octagonal frame 32, and the inner octagonal frame 33.

  The overhanging frame 35 is fixed to the grating 34 so that the position in the radial direction can be adjusted so that the tip of the overhanging frame 35 abuts against the outer periphery of the truncated cone chimney 100. Here, the radial direction means a radial direction centered on the work corridor 30 formed in an octagonal shape in plan view.

  The position adjustment and fixing of the overhanging frame 35 will be described in detail. The position of the grating 34 is adjusted so as to abut the outer periphery of the frustoconical chimney 100, and a plurality of fixing bolt holes 35a provided in the flange portion of the overhanging frame 35 are provided. The overhanging frame 35 whose position has been adjusted is fixed to the grating 34 by bolting together the bolt holes of the fixing ribs 34 a extending upward from the upper surface of the grating 34.

The curing plate 36 has a checker plate formed in a trapezoidal shape with a narrow inner peripheral side, and is placed on the upper surface of the overhanging frame 35 whose radial position is adjusted. The bottom side of the curing plate 36 is pivotally attached to the grating 34 via a hinge 36a.
By configuring in this way, the work corridor 30 is configured in an octagonal shape in plan view having an opening into which the truncated cone chimney 100 enters in the center in plan view.

  The support pipe 20 is a circular pipe having a circular shape in plan view, and connects the bottom surface of the diagonal member 11 and the top surface of the diagonal member 31 to support the work corridor 30 by suspending from the locking frame 10. Note that the outside of the support pipe 20 has an octagonal shape in plan view, and a fall prevention fence 21 is stretched around.

  The position restricting member 40 is fixed to the bottom surface of the diagonal member 11 so as to protrude downward by a predetermined length. Specifically, the bottom surface of the diagonal member 11 is spaced a predetermined distance in the length direction. A plurality of bolt holes are provided, and can be attached to a position corresponding to the diameter of the top 103 of the truncated cone chimney 100 where the chimney disassembly gondola 1 is installed.

  In this embodiment, the position regulating member 40 is attached and regulated at a position where the inner side of the position restricting member 40 is substantially in contact with the outer peripheral surface of the top 103 of the frustoconical chimney 100. You may attach to the position which touches the internal peripheral surface of the top part 103 substantially.

The roof stage 50 includes a floor formed in a cross shape with a checker plate and a handrail composed of a vertical pipe and a horizontal pipe.
In addition, suspension pieces (not shown) for lifting by the crawler crane 300 are provided at four equal circumferential positions on the upper surface of the locking frame 10, and the support pipe 20, the work corridor 30, and the position restriction member 40 are engaged. It is connected to the stop frame 10 by a bolt connection so as to be detachable.

  As shown in FIG. 3, the chimney disassembled gondola 1 configured as described above is equipped with the wire saw unit 200 and the generator 210 on the upper roof stage 50, and the worker M uses the truncated cone chimney 100 in the work corridor 30. Can be dismantled.

  Specifically, the chimney dismantling gondola 1 is arranged on the outer periphery of the truncated cone chimney 100, and has a ring-shaped work corridor 30 in plan view that forms a work space capable of cutting the truncated cone chimney 100 in a cross-sectional direction, and a cone. A locking frame 10 that locks to the top 103 of the chimney stack 100 and supports the work corridor 30 is provided, and a position restricting member 40 that regulates the locking position of the locking frame 10 with respect to the truncated cone stack 100. Therefore, in a state where the locking position is regulated by the position regulating member 40, the cutting frame 10 is locked to the top 103 of the frustoconical chimney 100, thereby cutting the truncated cone chimney 100 in the cross-sectional direction. The work corridor 30 that is a simple work space can be arranged in a ring shape in plan view at an appropriate position on the outer periphery of the truncated cone chimney 100. Therefore, the worker M can safely and easily cut the frustum chimney 100 from the chimney disassembly gondola 1 by the cutting line 110 and disassemble it.

  Further, the position restricting member 40 is attached so that the position in the radial direction with respect to the locking frame 10 can be adjusted, and the position restricting member 40 is configured to restrict the position along the outer peripheral surface of the frustoconical chimney 100. Even if it is 103, the radial position of the position restricting member 40 with respect to the locking frame 10 can be easily adjusted so that the chimney dismantling gondola 1 is disposed at an appropriate position.

  Therefore, since the truncated cone chimney 100 having any shape of the top portion 103 can be dealt with by a small adjustment work, the satisfaction of the worker M can be improved.

  In particular, the frustoconical chimney 100 has a frustoconical shape whose diameter gradually increases as dismantling progresses, but the position restricting member 40 can be easily positioned relative to the top 103 of the frustoconical chimney 100 remaining as an undisassembled part. Since it can be adjusted, the convenience for the worker M is improved.

  Further, a grating 34 that covers the floor of the work corridor 30, an extension frame 35 that is fixed to the upper surface of the grating 34, and whose radial position is adjusted so as to abut against the outer surface of the frustoconical chimney 100, and an upper surface of the extension frame 35 Since it is equipped with a curing plate 36 that is placed and closes the gap between the inner periphery of the grating 34 and the outer periphery of the frustoconical chimney 100, it is possible to prevent accidents due to crashes and falling objects, and to safely dismantle the work. Can do.

  In particular, even in the truncated cone chimney 100 having a frustum shape whose diameter increases as the dismantling proceeds, the gap between the inner periphery of the floor portion and the outer periphery of the truncated cone chimney 100 can be easily closed. The satisfaction of the person M can be improved.

  Specifically, as shown in FIG. 3A and FIG. 6, in the upper portion 101a having a small diameter, the overhanging frame 35 is adjusted inward in the radial direction on the grating 34, and the middle portion having a larger diameter than the upper portion 101a. In 101b, the radial position of the overhanging frame 35 can be adjusted to a position corresponding to the diameter of the frustoconical chimney 100 to be dismantled so that the radial position of the overhanging frame 35 is adjusted to the outside.

  Then, the curing plate 36 is placed on the upper surface of the overhanging frame 35 whose radial position is adjusted, and the gap between the inner peripheral side of the grating 34 and the outer periphery of the truncated cone chimney 100 can be easily covered. Even if the gap between the inner periphery of the grating 34 and the outer periphery of the frustoconical chimney 100 is halfway with respect to the length of the curing plate 36, the curing plate 36 is pivotally attached to the grating 34 via the hinge 36a. Therefore, the above-mentioned gap can be easily covered by installing it over the outer periphery of the truncated cone chimney 100.

  Therefore, even if the truncated cone-shaped chimney 100 whose diameter increases as the dismantling progresses, a safe working floor is formed without opening a large gap between the work corridor 30 and the outer periphery of the truncated cone chimney 100. be able to.

  In addition, since the work corridor 30 is configured by the inner corridor 30a or the outer corridor 30b that can adjust the installation position in the radial direction, the work corridor 30 can be set according to the diameter of the truncated cone chimney 100 to be dismantled, and work can be performed safely. be able to. In particular, even if the frustum-shaped frustum chimney 100 whose diameter increases as the dismantling progresses, the work corridor 30 corresponding to the diameter of the frustum chimney 100 can be easily set. The degree can be improved.

  Specifically, by renovating the inner corridor 30a from the inner corridor 30b to the outer corridor 30b, dismantling progresses, and the lower chimney 102 having a larger diameter can be dismantled by the worker M working from the outer corridor 30b. .

A method for disassembling the truncated cone chimney 100 using the chimney dismantling gondola 1 configured as described above will be described in detail below with reference to FIGS.
FIG. 7 is an explanatory diagram for explaining each dismantling state of the truncated cone chimney 100 by a side outline diagram, FIG. 8 is a flowchart of the chimney disassembling cycle K of the truncated cone chimney 100, and FIG. 9 is an overview of the gondola installation process. FIG. 10 shows an explanatory diagram of the waterproof apron 60, and FIG. 11 shows a schematic diagram of the ball-hanging replacement process.

  12 shows an enlarged perspective view for explaining the lifting level adjustment angle 70 and the horizontal core 80, FIG. 13 shows a schematic diagram of the cutting process, and FIG. 14 shows a schematic diagram of the bottom surface protection process. 15 shows a schematic diagram of the hanging process.

  As shown in FIGS. 7 and 9, the method of disassembling the truncated cone chimney 100 using the chimney dismantling gondola 1, the chimney disassembling gondola 1 is lifted by the crawler crane 300 and installed in the truncated cone chimney 100, and the part is disassembled. This is a method of repeatedly dismantling the chimney disassembly cycle K.

  The frustoconical chimney 100 has a frustoconical shape composed of a double structure including an outer concrete portion and an inner brickwork portion, and is approximately in the height direction according to the state of the work corridor 30 of the chimney demolition gondola 1. The upper part from the center is the upper chimney 101 and the lower part is the lower chimney 102. Furthermore, the uppermost part of the upper chimney 101 is the upper part 101a, and the vicinity of the lowermost part of the upper chimney 101 is the middle part 101b. The uppermost part of the lower chimney 102 is an upper part 102a, and the vicinity of the lowermost part of the lower chimney 102 is a middle part 102b.

Hereinafter, the chimney disassembly cycle K will be described in detail based on the flowchart of FIG.
First, the installation position of the position regulating member 40 of the chimney dismantling gondola 1 placed on the ground is adjusted according to the diameter of the top 103 of the truncated cone chimney 100 to be locked (regulating member adjusting step: step s1), and the cone Depending on the diameter of the chimney 100, the inner corridor 30a or the outer corridor 30b is selected to form a suitable work corridor 30 (floor adjustment step: step s2). Note that either the regulating member adjustment step (step s1) or the floor adjustment step (step s2) may be performed first.

  The slinging wire 310 is set with a shackle on a suspension piece (not shown) provided on the upper surface of the chimney demolition gondola 1 on the ground after the regulating member adjustment step (step s1) and the floor adjustment step (step s2) are finished, and the crawler The sling wire 310 is hung on the hanging hook 301 of the crane 300, the chimney dismantling gondola 1 is lifted by the crawler crane 300, the locking frame 10 is locked to the top 103, and the chimney disassembling gondola 1 is installed at the upper end of the truncated cone chimney 100. (Gondola installation process: Step s3).

  As shown in FIG. 6, the overhanging frame 35 is placed on the upper surface of the grating 34 installed so as to straddle the upper surfaces of the diagonal member 31, the outer octagonal frame 32, and the inner octagonal frame 33, and the tip is on the outer periphery of the truncated cone The radial position is adjusted and fixed so as to abut, and the gap between the inner periphery of the grating 34 in plan view and the outer periphery of the frustoconical chimney 100 is covered with a curing plate 36 placed on the upper surface of the overhanging frame 35 ( Crevice curing process: Step s4).

  More specifically, the curing plate 36 pivotally attached to the grating 34 via the hinge 36 a is pivoted in the direction of arrow R in FIG. 6, and the plan view inner periphery of the grating 34 and the outer periphery of the truncated cone chimney 100 are Is covered with a curing plate 36 placed on the upper surface of the overhanging frame 35. Thereby, the worker M can work safely in the work corridor 30 of the chimney dismantling gondola 1.

  Even if the gap between the inner periphery of the grating 34 and the outer periphery of the frustoconical chimney 100 is halfway with respect to the length of the curing plate 36, the curing plate 36 is pivotally attached to the grating 34 via the hinge 36a. Therefore, the above-mentioned gap can be easily covered by installing it over the outer periphery of the truncated cone chimney 100.

  After creating a safe working space, the worker M wraps and wears the waterproof apron 60 shown in FIG. 10 so as to be in close contact with the outer peripheral surface of the truncated cone chimney 100 below the cutting line 110 (waterproof apron wearing). Process: Step s5).

  As shown in FIG. 10A, the waterproof apron 60 includes a strip-shaped male surface fastener 61a on the upper surface 60a of the rectangular waterproof sheet, and a female surface fastener 61b on the back surface 60b. As shown in FIG. 10B, the male surface fastener 61a and the female surface fastener 61b facing each other can be attached by being wound around the outer periphery of the frustoconical chimney 100.

  In addition, when the joining strength of the hook-and-loop fastener 61 is weak and the adhesiveness with the outer peripheral surface of the truncated cone chimney 100 is low, the outer side of the upper part of the wound waterproof apron 60 may be tightened with a rubber band or a tightening belt.

  In this way, under the cutting line 110 of the frustoconical chimney 100, the hem of the waterproof apron 60 attached with the upper surface closely attached to the outer peripheral surface is lifted upward and used in a radially expanded manner, for example, cutting water drops. Can be prevented. Furthermore, it is used in a state where it is loosened in a U shape when viewed from the side and the hem is lifted up, and a sunny hose 62 (see FIG. 13) extending to the ground is attached to the bottom of the U shape when viewed from the side. You may drain.

  After the waterproof apron 60 is mounted in the waterproof apron mounting step (step s5), the horizontal cores 80 that are oriented in the center using the wet core drill are provided at four locations on the cutting line 110 that are even in the circumferential direction (horizontal core installation step). : Step s6).

  Then, as shown in FIG. 12, the sling wire 310 set on the hanging piece of the chimney dismantling gondola 1 is refilled with the horizontal core 80 (the slack refilling step: step s7), and the circumferential direction on the cutting line 110 The lifting level adjustment angles 70 are attached to the four equal parts (level adjustment attachment process: step s8).

The lifting level adjusting angle 70 is formed as a side-view hook with the angle upper part 70a spreading outward, and the angle lower part 70b is fixed below the cutting line 110 at a position where the angle upper part 70a protrudes from the cutting line 110. Yes.
The level adjustment attachment process (step s8) may be performed prior to the ball hanging replacement process (step s7) or the horizontal core installation process (step s6), and at the latest before the completion of the cutting process described later (step s9). Just do it.

  In this state, a lifting tension is applied to the sling wire 310 by the crawler crane 300, and the cutting line 110 is cut by the wire saw 202 that is rotationally driven by the wire saw unit 200 via the tension pulley 201 (cutting step: step s9).

  When cutting with the wire saw 202 is completed, the chimney 120 to be cut above the cutting line 110 and the cut chimney 130 below the cutting line 110 are cut off, so that lifting tension is applied via the sling wire 310. When the lifting center of gravity of the cut chimney 120 is shifted, the cut chimney 120 tends to shift in the horizontal direction.

  Therefore, the boom 320 of the crawler crane 300 is raised or the crawler crane 300 is swung while the lateral displacement of the chimney 120 to be cut is regulated by the lifting level adjustment angle 70 installed in the level adjustment attachment step (step s8). Then, the lifting center of gravity of the chimney 120 to be cut is adjusted so that the chimney 120 to be cut can be lifted upward as it is (lifting center of gravity adjustment step: step s10).

  Then, the chimney 120 to be cut whose lifted center of gravity is adjusted is slightly lifted, and the wire mocco is covered so that the bottom surface of the chimney 120 to be cut is covered from the bottom through the gap between the bottom surface of the chimney 120 to be cut and the top end of the cut chimney 130. 150 is attached (bottom protection process: step s11), and the chimney 120 to be cut is suspended from the chimney dismantling gondola 1 to the ground (hanging process: step s12), and the chimney disassembly cycle K is completed.

  By repeating this chimney disassembly cycle K, the frustoconical chimney 100 is disassembled. When disassembling the lower chimney 102, the chimney dismantling gondola 1 is repaired so as to become the outer corridor 30b in the floor adjustment step (step s2).

  In the dismantling method of the present invention described above, the ring-shaped work corridor 30 that forms a work space capable of cutting work cutting from the outer peripheral side of the truncated cone chimney 100 to the cutting line 110 and the top 103 of the truncated cone chimney 100 are provided. A chimney demolition gondola 1 including a locking frame 10 that locks and supports the work corridor 30 in a suspended manner, and a position restricting member 40 that restricts the locking position of the locking frame 10 with respect to the truncated cone chimney 100 is provided as a crawler crane. The locking frame 10 is locked to the top 103 of the truncated cone chimney 100 while being lifted at 300 and the locking position is regulated by the position regulating member 40, and the work corridor 30 is placed on the outer periphery of the truncated cone 100 near the cutting line 110. The gondola installation step (step s3) to be installed, and the chimney 12 to be cut which is the truncated cone chimney 100 above the cutting line 110 from the chimney dismantling gondola 1 The crawler crane 300 is replaced with a ball refilling step (step s7), the cutting step (step s9) for cutting the truncated cone 100 at the cutting line 110 with the wire saw 202 provided in the work corridor 30, and the crawler crane. In 300, since there is a hanging step (step s12) for hanging the chimney 120 to be cut with the chimney demolition gondola 1 locked to the top 103 together with the chimney demolition gondola 1, the frustoconical chimney 100 is wired from the work corridor 30 to the wire. The chimney 120 to be cut, which is cut by the saw 202 and above the cutting line 110 by the wire saw 202, is suspended on the ground together with the chimney dismantling gondola 1 so that the frustoconical chimney 100 can be safely disassembled.

  Further, in the ball hanging replacement process (step s7) after the gondola installation process (step s3) and before the cutting process (step s9), the horizontal core of the chimney 120 to be cut which is the truncated cone chimney 100 above the cutting line 110 Since the sling wire 310 is refilled at 80, the chimney 120 to be cut, to which the chimney disassembly gondola 1 is locked, is prevented from inadvertently falling during disassembly.

  In addition, since the chimney 120 to be cut is suspended from the ground in the suspension step (step s12), a subdivision operation for making the chimney 120 to be cut into pieces that can be transported can be performed on the ground. Compared with the dismantling method, the work efficiency is good, and further, there is no danger that the disposal pieces that have been chopped will fall, and it can be safely disassembled.

  Further, since the chimney demolition gondola 1 can be easily installed on the truncated cone chimney 100 by the crawler crane 300, the chimney demolition gondola 1 can be easily removed from the frustoconical chimney 100 after each operation or even when a typhoon approaches. And safe temporary environment can be realized.

Further, the gondola installation process (step s3), the sling change process (step s7), the cutting process (step s9), and the hanging process (step s12) are set as a series of chimney disassembly cycles K, and the chimney disassembly cycle K is performed a plurality of times. Repeatedly, the gondola installation step (step s3) in the second and subsequent chimney demolition cycles K is a cutting residue below the cutting line 110 of the truncated cone chimney 100 cut in the cutting step (step s9) in the immediately preceding chimney demolition cycle K. The locking frame 10 can be locked to the top part 103 of the chimney 130, and the truncated cone chimney 100 to be disassembled can be disassembled by repeating a series of chimney disassembly cycles K a plurality of times.
Moreover, by making a series of steps into a cycle, work efficiency can be improved by repetition, and disassembly efficiency can be improved safely.

  Furthermore, in the suspension step (step s12), the chimney 120 to be cut is slightly lifted, and the wire mocco 150 covering the bottom is inserted from the gap between the top 103 of the cut chimney 130 and the bottom of the chimney 120 to be cut, By having the bottom surface protection step (step s11) for covering the bottom with the wire mocco 150, it is possible to prevent an object from being accidentally dropped from the bottom of the chimney 120 to be cut when the chimney 120 to be cut is suspended.

  In particular, in the double-structured truncated cone chimney 100 in which the inner side is a brick stacking part, when the chimney 120 to be cut is lifted in the hanging step (step s12), there is a possibility that the inner brick falls. Since the bottom of the chimney 120 to be cut is covered with the wire mocco 150, the brick can be prevented from falling, which is safe.

  Further, at the latest, before the completion of cutting in the cutting process (step s9), a lifting level adjustment angle 70 that protrudes toward the cut chimney 120 side so as to straddle the cutting line 110 is installed on the outer periphery of the top portion 103 of the cut chimney 130. Level adjustment mounting process (step s8), and in the suspension process (step s12), after the cutting process (step s9), the lifting center of gravity when lifting the chimney 120 to be cut with the crawler crane 300 is adjusted to the lifting level. In a state where the horizontal movement of the chimney 120 to be cut is restricted at the angle 70, a lifting center-of-gravity adjustment step (step s10) to be adjusted is included.

  Therefore, the cut chimney 120 to which the lifting tension is applied in a state where the lifting center of gravity of the crawler crane 300 is shifted is disconnected from the cut remaining chimney 130 by the completion of the cutting in the cutting step (step s9), and in the lifting center of gravity direction. Even if it is intended to move, the horizontal movement of the chimney 120 to be cut is restricted by the lifting level adjustment angle 70. In this state, the lifting center of gravity by the crawler crane 300 can be adjusted. The suspension step (step s12) can be carried out.

  Moreover, it has the horizontal core installation process (step s6) which provides the horizontal core 80 which penetrates the cutting line 110 vicinity of the truncated cone chimney 100 in a horizontal direction before the ball-hanging replacement process (step s7). In step s7), the ball hook wire 310 is replaced with the horizontal core 80 on the cut chimney 120 side, and the cutting line 110 in the cutting step (step s9) is set to a position crossing the horizontal core 80, so that the immediately preceding chimney The lower half of the horizontal core 80 provided in the demolition cycle K remains on the top 103 of the chimney 120 to be cut in the chimney demolition cycle K, and the upper half of the horizontal core 80 provided in the chimney demolition cycle K is cut. The chimney 120 to be cut can be cut so as to be the bottom of the chimney 120.

  In addition, since the upper half of the cut-out chimney 120 can be lifted from the bottom of the chimney 120 to be cut because the sling wire 310 is refilled on the horizontal core 80 at the bottom of the chimney 120 to be cut, the chimney 120 to be cut can be lifted from the bottom. Is fragile and can be prevented from being destroyed by a lifting load.

  Further, since the sling wire 310 can be locked to the upper half of the horizontal core 80 at the bottom of the chimney 120 to be cut, the locking position of the sling wire 310 is shifted in the circumferential direction, and the lifting center of gravity is shifted and falls. Can be prevented. Furthermore, in the state where the hanging wire 310 is subjected to the lifting tension, the hanging position is shifted in the circumferential direction because the hanging wire 310 is locked to the lower half of the horizontal core 80 of the top 103 of the chimney 120 to be cut. It is possible to more reliably prevent the lifted center of gravity from shifting and falling.

  Further, the position restricting member 40 is attached to the locking frame 10 so that the position in the radial direction can be adjusted, and the position restricting member 40 is configured to restrict the position along the peripheral surface of the frustoconical chimney 100. s3) includes a regulating member adjustment step (step s1) for adjusting the position of the position regulating member 40 in the radial direction with respect to the locking frame 10 in accordance with the top 103 of the truncated cone chimney 100 that locks the locking frame 10. By having it, even if it is the top part 103 of various shapes and diameters, the position of the radial direction with respect to the locking frame 10 of the position control member 40 can be easily arranged so that the chimney dismantling gondola 1 is disposed at an appropriate position. Can be adjusted.

  Therefore, the frustoconical chimney 100 has a frustoconical shape in which the diameter of the top portion 103 gradually increases as the dismantling progresses. However, the position of the position regulating member 40 with respect to the top portion 103 of the remaining truncated cone chimney 100 can be easily reduced. Since it can be adjusted by the adjustment work, the convenience and satisfaction of the worker M can be improved.

  Further, it has an overhanging frame 35 and a curing plate 36 that block the gap between the inner periphery of the floor of the work corridor 30, that is, the inner periphery of the grating 34 and the outer periphery of the truncated cone chimney 100, and after the gondola installation step (step s3) In addition, the overhang frame 35 and the curing plate 36 have a gap curing step (step s4) for closing the gap between the inner periphery of the grating 34 and the outer periphery of the frustoconical chimney 100. Accidents can be prevented and dismantling can be done safely.

  In particular, a truncated cone-shaped chimney 100 whose diameter increases as the dismantling progresses, and the gap between the inner periphery of the grating 34 and the outer periphery of the truncated cone chimney 100 is halfway with respect to the length of the curing plate 36. Even if it exists, since the curing plate 36 is pivotally attached to the grating 34 via the hinge 36a, the said clearance gap can be easily covered by installing it over the outer periphery of the truncated cone chimney 100.

  At this time, it is better if the end portions in the width direction on the center side of the adjacent curing plates 36 overlap each other. Thereby, since reliable clearance curing can be performed easily, the satisfaction of the operator M can be improved.

  Further, the work corridor 30 is configured by an inner corridor 30a or an outer corridor 30b that can adjust the installation position in the radial direction, and the outer periphery of the truncated cone chimney 100 on which the work corridor 30 is installed before the gondola installation step (step s3). Accordingly, the work corridor 30 according to the diameter of the truncated cone chimney 100 to be disassembled can be set safely because it has a floor adjustment step (step s2) for adjusting the radial installation position of the inner corridor 30a or the outer corridor 30b. Can work.

In particular, even if the frustum-shaped frustum chimney 100 whose diameter increases as the dismantling progresses, the work corridor 30 corresponding to the diameter of the frustum chimney 100 can be easily set. The degree can be improved.
The crawler crane 300 may be configured with a rough terrain crane or a helicopter.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The tower structure corresponds to the truncated cone 100, the upper 101 or the lower 102,
Similarly,
The work stage corresponds to the work corridor 30,
The position restricting means or the adjustable position restricting means corresponds to the position restricting member 40,
The tower-shaped structure demolition gondola corresponds to the chimney demolition gondola 1,
The gap curing means corresponds to the overhang frame 35 and the curing plate 36,
The position adjustment floor corresponds to the inner corridor 30a or the outer corridor 30b,
The cutting means corresponds to the wire saw 202,
The cutting water fall prevention means corresponds to the waterproof apron 60,
The lifting means corresponds to the crawler crane 300 or the sling wire 310,
The structure to be cut corresponds to the chimney 120 to be cut,
The remaining cutting structure corresponds to the remaining cutting chimney 130,
The bottom covering means corresponds to the wire mocco 150,
The cutting point corresponds to the cutting line 110,
The horizontal movement restriction means corresponds to the lifting level adjustment angle 70,
The horizontal through hole corresponds to the horizontal core 80,
The position restricting means adjusting step corresponds to the restricting member adjusting step (step s1),
The floor adjustment process corresponds to the floor adjustment process (step s2),
The stage installation process corresponds to the gondola installation process (step s3),
The gap curing process corresponds to the gap curing process (step s4),
The horizontal through hole installation process corresponds to the horizontal core installation process (step s6),
The lifting means replacement process corresponds to the ball hanging replacement process (step s7),
The horizontal movement restriction means installation step corresponds to the level adjustment attachment step (step s8),
The cutting process corresponds to the cutting process (step s9),
The lifting center of gravity adjustment step corresponds to the lifting center of gravity adjustment step (step s10).
The bottom covering process corresponds to the bottom surface protecting process (step s11),
The hanging process corresponds to the hanging process (step s12),
The partial disassembly cycle corresponds to the chimney disassembly cycle K,
The present invention is not limited to the configuration of the above-described embodiment.

The perspective view of a chimney demolition gondola. The perspective view of the chimney demolition gondola of the state set to the truncated cone chimney to dismantle. Sectional drawing of the chimney demolition gondola set in the upper chimney. Sectional drawing of the chimney dismantling gondola 1 of the state set to the lower chimney. Explanatory drawing about the work corridor of the chimney demolition gondola. Explanatory drawing about the structure of a work corridor. Explanatory drawing explaining each disassembly condition of a truncated cone chimney. The flow diagram of the dismantling cycle of the truncated cone. Schematic diagram of the gondola installation process. Explanatory drawing about a waterproof apron. Schematic diagram of the tamakake replacement process. Enlarged perspective view for explaining the lifting level adjustment angle and the horizontal core The schematic diagram of a cutting process. Schematic diagram of bottom protection process. Schematic diagram of the suspension process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chimney dismantling gondola 10 ... Locking frame 30 ... Working corridor 30a ... Inner corridor 30b ... Outer corridor 35 ... Overhang frame 36 ... Curing plate 40 ... Position control member 60 ... Waterproof apron 70 ... Lifting level adjustment angle 80 ... Horizontal core 100 ... conical chimney 101 ... upper chimney 102 ... lower chimney 103 ... top 110 ... cutting line 120 ... cutting chimney 130 ... cutting chimney 150 ... wire mokko 202 ... wire saw 300 ... crawler crane 310 ... crest wire

Claims (13)

A ring-shaped work stage in plan view that is disposed on the outer periphery of the tower-like structure and constitutes a work space capable of cutting work for cutting the tower-like structure in the cross-sectional direction;
A locking frame that locks to the top of the tower-like structure and supports the work stage by hanging,
A tower-shaped structure dismantling gondola comprising position restriction means for regulating a locking position of the locking frame with respect to the tower-shaped structure. The position regulating means;
2. The tower-like structure dismantling gondola according to claim 1, wherein the tower-like structure dismantling gondola is configured by adjustable position restricting means that adjusts a position in a radial direction with respect to the locking frame and regulates a position along a peripheral surface of the tower-like structure. The tower-like structure dismantling gondola according to claim 1 or 2, further comprising a gap curing means for closing a gap between an inner circumference of the floor portion of the work stage and an outer circumference of the boarding structure. The floor of the work stage,
The tower-like structure dismantling gondola according to claim 3, comprising a position-adjustable floor capable of adjusting the installation position in the radial direction. The work stage is configured to allow cutting work by a wet cutting means for cutting the tower-like structure in a cross-sectional direction,
Installed below the cutting portion of the tower-like structure, provided with cutting water fall prevention means for preventing the cutting water from falling,
The tower-shaped structure dismantling gondola according to any one of claims 1 to 4, wherein the cutting water fall-preventing means can be mounted in close contact with an outer peripheral surface below a cut portion of the tower-shaped structure. A ring-like work stage in plan view that constitutes a work space capable of cutting work for cutting the tower-like structure in the cross-sectional direction from the outer peripheral side of the tower-like structure, and locked to the top of the tower-like structure, A tower-like structure dismantling gondola comprising a locking frame that suspends and supports a work stage, and a position regulating means that regulates a locking position of the locking frame with respect to the tower-like structure is lifted by a lifting means, A stage installation step in which the locking frame is locked to the top of the tower-like structure while the locking position is restricted by a position-regulating means, and the work stage is installed on the outer periphery in the vicinity of the cut portion of the tower-like structure. When,
From the tower-shaped structure dismantling gondola, a lifting means replacement step for replacing the lifting means to a structure to be cut that is a tower-shaped structure above the cutting location;
A cutting step of cutting the tower-like structure in a cross-sectional direction with a cutting means equipped on the work stage;
A tower-like structure dismantling method comprising a lifting step of hanging the structure to be cut with the tower-like structure dismantling gondola on the top by the lifting means together with the tower-like structure dismantling gondola. The stage installation step, the lifting means replacement step, the cutting step and the hanging step are a series of partially disassembled cycles,
Repeating the partial decomposition cycle a plurality of times,
The stage installation process in the second and subsequent partial decomposition cycles is as follows:
The dismantling method of the tower-like structure according to claim 6, wherein the locking frame is locked to the top of the remaining cutting structure below the cutting position of the boarding structure cut in the cutting step in the immediately preceding partial decomposition cycle. . In the hanging process,
The structure to be cut is slightly lifted, and a bottom covering means for covering the bottom is inserted from a gap between the top of the remaining cutting structure and the bottom of the structure to be cut, and the bottom covering means covers the bottom. The tower-like structure dismantling method according to claim 6 or 7, further comprising a bottom covering step. At the latest, before the completion of cutting in the cutting step,
A horizontal movement restricting means installation step of installing a horizontal movement restricting means protruding on the other side so as to straddle the cut portion on the outer periphery of the top of the remaining cutting structure or the outer periphery of the bottom of the structure to be cut;
In the hanging process,
After the cutting step, the lifting center of gravity when the to-be-cut structure is lifted by the lifting means is adjusted in a state in which the horizontal movement of the to-be-cut structure is restricted by the horizontal movement restricting means. The tower-like structure dismantling method according to any one of claims 6 to 8, further comprising an adjusting step. Before the refilling process,
A horizontal through hole installation step of providing a horizontal through hole penetrating in the horizontal direction around the cutting portion of the boarding structure;
In the refilling step, the lifting means is replaced with the horizontal through hole on the cut structure side,
The dismantling method of the tower-like structure according to any one of claims 6 to 9, wherein a cutting location in the cutting step is a position crossing the horizontal through hole. The position restricting means is configured to be an adjustable position restricting means for attaching the position in the radial direction with respect to the locking frame to be adjustable, and restricting the position along the peripheral surface of the tower-like structure,
Before the stage installation process,
The position adjusting means adjusting step for adjusting the position in the radial direction with respect to the locking frame according to the top portion of the tower-like structure that locks the locking frame. The dismantling method of the tower-like structure of 10. A clearance curing means for closing a clearance between the inner periphery of the floor of the work stage and the outer periphery of the boarding structure;
After the stage installation process,
The tower-like structure dismantling method according to any one of claims 6 to 11, further comprising a gap curing step of closing a gap between the inner periphery of the floor portion and the outer periphery of the boarding structure with the gap curing means. The floor of the work stage is configured with a position adjustment floor capable of adjusting the installation position in the radial direction,
Before the stage installation process,
The tower-like structure dismantling method according to any one of claims 6 to 12, further comprising a floor adjustment step of adjusting a radial installation position of the position adjustment floor according to an outer periphery of the boarding structure on which the work stage is installed.

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