JP2018123617A - Dismantling method of high-rise building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the possibility of dismantling caused by the dismantling of a high-rise building falling from a high-rise building.SOLUTION: A plurality of masts 10 connecting a plurality of secondary masts to the periphery of the high-rise building B are set up, and the sheet material 22 is attached to the top end of the mast 10. The sheet material 22 includes an upper sheet 22A covering the upper surface of the high-rise building B and a side sheet 22B covering side surfaces of the high-rise building B. The lower end of the side sheet 22B is connected to the outer surface of the high-rise building B. In this state, the high-rise building B above the portion to which the lower end of the side sheet 22 B is connected is disassembled from the inside of the high-rise building B. After disassembling the part, the secondary mast is removed from the bottom end, and the sheet material 22 is lowered. The disassembling from the inside of the high-rise building B and the descent of the sheet material 22 are alternately repeated.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a technique for dismantling a high-rise building.

  There are many skyscrapers around the world. In the present application, a building having a height of at least 100 m is referred to as a “high-rise building”. Since many years have passed since the construction of high-rise buildings, some existing high-rise buildings are about to expire or have expired.

Of course, high-rise buildings that have reached the end of their useful lives need to be demolished. However, high-rise buildings are not designed to be demolished at the stage of construction, and dismantling is generally difficult. In consideration of such points, various methods for dismantling high-rise buildings have been proposed.
One of them is a dismantling method that installs heavy machinery on the roof of a high-rise building. Such a construction method is a construction method in which medium and small heavy machinery is lifted on a rooftop by a mobile crane or the like, and high-rise buildings are disassembled sequentially from the rooftop to the bottom. The debris, etc. generated by dismantling is moved to the lower floor through dead holes or suspended by a crane.
Such a demolition method is often employed when there is no heavy equipment installation space around a high-rise building, or when a high-rise building with a height that does not reach the long boom of the heavy equipment used for demolition is demolished.

Of course, the above-described demolition method can dismantle a high-rise building and is particularly useful under specific conditions where it is difficult to use other methods as described above.
However, in the above-described demolition method, a high-rise building is dismantled with heavy machinery on the roof of a high-rise building, and after that, a demolition operation with heavy machinery is performed on the top of the high-rise building. At that time, objects (for example, concrete fragments, bolts, nuts, other metal pieces, etc., hereinafter collectively referred to as “dismantled objects”) generated by dismantling from the top of the high-rise building to the ground. There is a possibility of falling. Such demolitions are small and not heavy, but if they fall from the top of a high-rise building, that is, from a very high position, flat, when it reaches the ground The speed of the can be so great that it can cause great danger.
High-rise buildings usually exist in the city, and there are roads or railroad tracks below them. The possibility that demolition will interfere with people walking on the road, cars running on the road, railways running on the track should be reduced as much as possible, and there is also a demand for such demolition methods.
However, a method for demolishing a high-rise building that can satisfy such demand is not known at least at present even if a deconstruction method other than the above-mentioned demolition method is considered.

  This invention makes it the subject to provide the demolition construction method of a high-rise building with the low possibility that the demolition thing resulting from the demolition of a high-rise building will fall from a high-rise building.

In order to solve the above-mentioned problems, the present inventor proposes the following invention.
The present invention relates to a dismantling method for a high-rise building having a substantially rectangular parallelepiped shape (hereinafter sometimes simply referred to as “dismantling method”), and is set up along the high-rise building at an appropriate location around the high-rise building. The upper surface of the high-rise building is connected to the upper end of the mast that is initially set to a height approximately equal to the height of the high-rise building, or is formed by connecting a number of sub-masts that are continuously connected in the length direction. A sheet material having an upper surface sheet and a side sheet covering a range of the entire circumference of the side surface of the high-rise building where the high-rise building is disassembled at one time, and an edge of the side sheet has an outer surface of the high-rise building Sheet material fixing process for fixing so as to contact the entire circumference of the sheet, and a dismantling process for disassembling the upper end side of the high-rise building in a range substantially corresponding to the side sheet when viewed from the side, from the inside of the high-rise building. The above When the upper end side of the high-rise building in the range corresponding to the side sheet is disassembled by the body process, by removing at least one of the sub-masts from each mast, the sheet by the length of the shortened mast And a sheet material lowering process for lowering the height position of the material.
And in the dismantling method of the high-rise building of this invention, the said high-rise building is demolished from the top to the bottom by repeating the said dismantling process and the said sheet | seat material descending process alternately.
In such a demolition method, a predetermined range above a high-rise building to be demolished is covered with a sheet material, and then a process of demolishing a high-rise building in a range generally covered with the sheet material and a sheet material corresponding to the demolished amount. By repeatedly performing the lowering process, each time the sheet material is lowered, the high-rise building that is generally covered with the sheet material is dismantled to dismantle the high-rise building from top to bottom. Here, since the sheet material includes an upper surface sheet that covers the upper surface of the high-rise building and a side sheet that covers a range in which the high-rise building is dismantled at once in the entire circumference of the side surface of the high-rise building, A high-rise building that is demolished between the time when the sheet material is installed at a certain height and the time when it is lowered, the entire exposed surface and all sides are covered with the sheet material. It becomes possible.
Therefore, according to the demolition method of the present invention, the range of the high-rise building that is demolished at a time is the range covered with the sheet material, thereby preventing the demolition from unexpectedly falling from the high-rise building. Is possible. Furthermore, when dismantling the area that will be demolished at once, the interior of the high-rise building will be dismantled first, and finally the outer wall of the high-rise building will be dismantled. Since the resulting demolished material is prevented from falling due to the presence of the outer wall, the possibility of the demolished product falling can be eliminated.
In the invention of the present application, the sheet material is fixed above a mast erected around a high-rise building. Each mast is configured by connecting a number of sub-masts in the length direction continuously. When lowering the sheet material, remove each mast by removing at least one sub-mast from each mast. This is achieved by shortening. By adopting such a configuration, the vertical movement of the sheet material with respect to the mast is omitted, so that the sheet material may receive a strong wind due to being at a high place, or a mast that requires a certain strength, or It is because it can prevent that the intensity | strength of the below-mentioned aggregate connected with a mast falls.
Note that the top sheet and the side sheet constituting the sheet material of the present application may be mesh-shaped or net-shaped as long as they are planar materials. This makes the sheet material less susceptible to wind. However, even in this case, it is necessary that the eyes opened in the mesh-like or net-like sheet material have a shape and size in which the smallest thing among the dismantled articles that cannot be dropped from the high-rise building cannot pass.
Note that the dismantling method of the present application does not have to be performed for all the high-rise buildings, and can be applied to a certain range from the top of the high-rise buildings. In that case, what is necessary is just to demolish by a general demolition construction method about the predetermined range from under the high-rise building which can be demolished by a general demolition construction method.
In the present invention, it is possible to form a tent by the sheet material and the aggregate by stretching the sheet material to an aggregate that maintains the shape by supporting the sheet material.

In the demolishing method of a high-rise building of the present invention, the sheet material lowering process can support the second mast included in each mast from the bottom, and can be moved downward. The supporting means of the jack having a supporting means supports the second mast included in each mast from the bottom, and the lower mast supported by the supporting means in that state is supported by the supporting mast. A step of removing one submast from each mast by removing the submast and lowering the support means may be included.
As described above, in the sheet material lowering process, the height of each mast is lowered by removing the sub-mast from each mast. Here, the sub-mast excluded from each mast is not located in the middle of the mast, but can be removed from the mast by releasing the connection with the other sub-mast at one point. It is reasonable to be located below. By the way, when trying to remove the mast on the top of the mast from the mast, the work is particularly similar to the height of the high-rise building where the initial height of the mast established when carrying out the dismantling method Sometimes it is done at a high place. Such work at high altitudes is usually not sufficient to secure a foothold that can be said to be sufficient in terms of both breadth and robustness, and if it is still possible to remove the sub-mast from the mast, The connection must be relatively simple.
On the other hand, if the sub-mast is removed from the lower end of the mast, the work can be performed on or near the ground. If the work is performed in such a place, the work can be done with a sufficient scaffolding in terms of size and robustness, so that even if the connection between the sub-masts is strong, there are few problems. . Therefore, if the sub-mast is removed from the lower end of the mast, the strength of the entire mast can be increased as a result. As described above, at least the mast has a high height, and a sheet material is attached above the mast, so that it is strongly affected by wind and rain. Considering such points, the strength of the mast is significant.
The operation of removing the secondary mast from each mast can be performed using a general jack. That is, the mast supported by the supporting means including the second auxiliary mast is removed by the jack after removing the lowest auxiliary mast while the second supporting mast is supported by the supporting means of the jack. Is lowered by moving the support means downward by the length of the sub-mast from which the support means has been removed.
When it is necessary to further increase the strength of the mast in the dismantling method of the high-rise building of the present invention, the dismantling method includes the step of disassembling each of the masts before the first dismantling process is performed. A process of fixing to the outer periphery may be included. In this case, each mast may be fixed to a high-rise building at a plurality of locations.

The demolition process in the method of demolishing a high-rise building according to the present invention may include a process of dropping debris generated by demolishing the high-rise building onto a basement via an elevator shaft provided in the high-rise building.
An openable / closable portion may be provided at a predetermined portion of the top sheet. In this case, the demolition process in the high-rise building demolition method of the present invention may include a process in which debris generated by dismantling the high-rise building is lifted by a crane from the opened opening / closing section and lowered to the ground.
By these methods, debris can be lowered to the ground. Of course, these methods are not alternative, and both of them may be adopted.

The top sheet may be made of an impermeable material. In this case, the upper surface sheet may be inclined so that a specific portion, which is a predetermined portion, is lower than the other portions. When these conditions are satisfied, the method of dismantling a high-rise building according to the present invention may include a process of draining rainwater accumulated in the specific part through a pipe continuous from the specific part to the ground.
According to this, the worker under the top sheet in the high-rise building being dismantled can surpass the rain by the top sheet, and drainage of the rainwater collected on the top sheet can be easily performed. It can be carried out.

The perspective view which shows the high-rise building disassembled in one Embodiment. The perspective view which shows the state which stood the mast around the high-rise building shown in FIG. The perspective view which shows the state which attached the roofing material on the mast shown in FIG. The longitudinal cross-sectional view which expands and shows the roof material vicinity of FIG. The figure which shows the state in the middle of the demolition of the range demolished at once among the high-rise buildings from the state shown in FIG. The figure which shows the state from which the range dismantled at once in the high-rise building was dismantled from the state shown in FIG. The side view which shows the method of jackdown of a mast notionally. The side view which shows the state which lowered | hung the roofing material by performing jackdown of the mast. The perspective view which shows the modification of a roof material.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, a high-rise building B as shown in FIG. 1 is dismantled. This high-rise building B has a height of 100 m or more. The high-rise building B has a substantially rectangular parallelepiped shape. In the high-rise building B in FIG. 1, illustrations of windows, entrances, and the like are omitted, but they are also present in the high-rise building in this embodiment in the same manner as ordinary high-rise buildings.
Further, as shown in FIG. 4 and the like, an elevator shaft B1 extending from the basement to the top floor is provided inside the high-rise building B.

In dismantling the high-rise building B, first, an appropriate number of masts 10 are erected at appropriate locations around the building (FIG. 2). The mast 10 sets the number which can obtain sufficient strength to support the roofing material, which will be described later, at a position where sufficient strength can be obtained to support the roofing material and locational circumstances are allowed.
In this embodiment, as shown in FIG. 2, four masts 10 are erected slightly outside the vertices of the rectangle when the high-rise building B is viewed in plan. However, the number of masts 10 and the positions at which they stand are not necessarily limited to this. For example, a plurality of masts 10 can be further raised along the wall surface of the high-rise building B.
In addition, all of the four masts 10 raised in this embodiment are substantially the same height as the high-rise building B, and more specifically, are slightly lower than the high-rise building B.

The mast 10 includes a number of sub-masts 11. Each of the multiple sub masts 11 has a rod shape, and the end portions thereof can be connected to the end portions of the sub masts 11 adjacent in the vertical direction. As the mast 10 and the auxiliary mast 11 constituting the mast 10, for example, a mast of a tower crane or a member constituting the mast can be used.
Each mast 10 can be raised as follows, for example. If there is a crane whose arm reaches above the planned uppermost end position of the mast 10, a process of placing the sub mast 11 lifted by the crane arm on the sub mast 11 below the mast 10 is performed. It is possible to extend the mast 10 to a predetermined height by continuously performing the operation while connecting the sub mast 11 each time. In this case, the crane may exist on the ground or may exist, for example, on the roof of the high-rise building B.
Alternatively, as in the case of a mast-climbing tower crane, a crane that can move up and down with respect to the mast 10 is used, and the auxiliary mast 11 that is suspended by the arm of the crane is attached to the auxiliary mast 11 to which the crane is attached. It is possible to extend the mast 10 to a predetermined height by continuously performing the process of connecting the new sub mast 11 and the sub sub mast 11 therebelow while moving the crane upward. It becomes possible.
Alternatively, first, a sub-mast 11 is erected on the ground, and after jacking it up, a new sub-mast 11 is added below it, and the new sub-mast 11 is connected to the sub-mast 11 above it. By jacking up two connected sub-masts, adding a new sub-mast 11 underneath, and connecting the new sub-mast 11 and the sub-mast 11 above it, and so on, are repeated. It becomes possible to extend the mast 10 to a predetermined height.
Note that each mast 10 need not be erected in the same way. In addition, each mast 10 erected along the high-rise building B can be connected to the high-rise building B by an appropriate method, which is the case in this embodiment. In this embodiment, the mast 10 and the high-rise building B are connected using an appropriate metal fitting 12. One mast 10 and the high-rise building B can be connected at a plurality of locations using a plurality of metal fittings 12. The connection between the mast 10 and the high-rise building B is for the purpose of enabling the mast 10 to obtain strength for supporting the roofing material. The number or the like is appropriately selected. The connection between each mast 10 and the high-rise building B by the metal fitting 12 may be made after the mast 10 reaches a predetermined height. However, except for the case where the mast 10 is erected by jackup, It is possible to carry out even in a state where the planned height is not reached.
Although not restricted to this, the jack 40 which can perform jackdown as mentioned later is provided in the lower end of each mast 10 in this embodiment. The jack 40 may be capable of jacking up as described above.

The roof material 20 is attached to the upper ends of the four masts 10 standing as described above or in the vicinity thereof (FIGS. 3 and 4). The roofing material 20 covers the upper end of the high-rise building B from its upper surface and side surfaces. In this embodiment, the roofing material 20 is attached to the upper end of each mast 10, although not limited thereto.
The roof material 20 generally includes a wall portion 21 fixed to the upper end of the mast 10, a sheet material 22 that is a film material, and an aggregate 23 that supports the sheet material 22. By these combinations, the roofing material 20 effectively constitutes a tent.

In attaching the roofing material 20 to the upper end of the mast 10, first, the wall portion 21 is attached to the upper end of the mast 10. The wall portion 21 is a metal structure that is provided along four rectangular sides with the upper ends of the four masts 10 as vertices and whose longitudinal section along the length direction is substantially U-shaped. is there. The lower side, the upper side, and the outer side of the wall portion 21 are configured by plate-like bodies, and the inner side (side facing the high-rise building B) is configured by columns that are erected at a predetermined interval. An operator can walk on the lower plate of the wall portion 21. Thereby, the worker can go around the high-rise building B along the wall portion 21. The operator can perform work necessary for dismantling the high-rise building B not only from the inside of the high-rise building B but also from the outside of the high-rise building B. The work required for dismantling the high-rise building B performed from the outside of the high-rise building B is, for example, a work of fixing a sheet material 22 to be described later to the outer periphery of the high-rise building B.
At some places in the wall portion 21, for example, a gondola 21 </ b> A that can be moved up and down with an operator on it and stopped at an arbitrary height is powered by a hydraulic pump (not shown) as a power source. And in this embodiment it is. If the inside which is the side facing the high-rise building B of the gondola 21 </ b> A is opened, the worker can perform work for dismantling the high-rise building B at an arbitrary height in the wall portion 21.

  When the wall portion 21 is attached to the upper end of the mast 10, the aggregate 23 is subsequently attached to the wall portion 21. The aggregate 23 is for supporting the sheet material 22 as described above, and may be configured in any manner as long as it is possible. The aggregate 23 in this embodiment is composed of a metal rod-shaped member. For example, the aggregate 23 may include a member passed between two adjacent masts 10. Further, the aggregate 23 may include four members extending from the center of the sheet material 22 to above the mast 10 and a member passed between the two masts 10 adjacent from the center of the sheet material 22. Good. Four members that extend from the center of the sheet material 22 of the aggregate 23 to above the mast 10, and members that are passed between the two masts 10 adjacent to the center of the sheet material 22 of the aggregate 23 Both have two upper and lower stages, and a known or well-known truss structure can be formed in order to maintain the strength of the aggregate 23 between them. In addition, illustration of the aggregate 23 is abbreviate | omitted in FIG.

When the aggregate 23 is attached to the wall portion 21, the sheet material 22 is subsequently stretched along the aggregate 23. In this embodiment, as shown in FIG. 4, four members extending from the center of the sheet material 22 of the aggregate 23 to above the mast 10 and adjacent to the center of the sheet material 22 of the aggregate 23. It is stretched below the member passed between the two masts 10.
The sheet material 22 is a sheet. The sheet material 22 may be a film material, or may be a mesh-like or net-like sheet. As will be described later, the sheet material 22 is for preventing a dismantled product generated during the dismantling operation of the high-rise building B from falling out of the high-rise building B. Therefore, the sheet material 22 is temporarily in a mesh shape or a net shape. If present, the eyes must be sized and shaped so that the smallest dismantled items that are allowed to fall cannot pass between them. But the sheet | seat material 22 in this embodiment is a typical sheet | seat with no eyes, and although it is not restricted to this, it is water-impermeable. The sheet material 22 does not need to be entirely made of the same material. For example, the top sheet 22A and the side sheet 22B can be made of different materials. For example, the top sheet 22A is a sheet having water impermeability while the side sheet 22B is a mesh or net sheet.
The sheet material 22 has an upper surface sheet 22A that covers the upper surface of the high-rise building B (initially the upper surface of the roof of the high-rise building B), and four side surfaces of the high-rise building B at a predetermined height (for example, one floor of the high-rise building B). And four side sheets 22B covered by about 1.5 floors). The upper ends of the four side sheets 22B are connected to the four sides of the top sheet 22A without any gaps, and both ends in the width direction of the four side sheets 22B are not spaced from the ends of the adjacent side sheets 22B. It is connected.
The top sheet 22A is rectangular in a plan view, and when the sheet material 22 is stretched over the aggregate 23, the sheet 22A is inclined so as to descend toward the center thereof, so that the whole becomes a mortar shape. Is done. A hole 22A1 is formed in the center of the upper surface sheet 22A, which is the part of the upper surface sheet 22A that has been lowered. A funnel 31 is provided below the hole 22A1 of the top sheet 22A, and one end of a drainage pipe 32, which is a pipe, is connected to the lower part of the funnel 31. Although not limited to this, the drain pipe 32 is a pipe formed of a flexible material in this embodiment. The other end of the drain pipe 32 extends to the ground, and is inserted into a drain outlet, for example. The above-described inclination provided on the top sheet 22A is for collecting rainwater that has fallen on the top sheet 22A during the dismantling of the high-rise building B into the above-described hole 22A1. The rainwater collected in the hole 22A1 is guided to one end of the drain pipe 32 through the funnel 31, and flows from the other end of the drain pipe 32 through the drain pipe 32 to, for example, a drain port.
The top sheet 22A is also provided with an openable / closable window 22A2. Window part 22A2 is for taking out the debris mentioned later from there.
Moreover, the lower edge of the four side sheets 22B is fixed to the side surface of the high-rise building B by an appropriate method, for example, over the entire length in the length direction. Such fixing is performed in such a manner that a gap allowing the fall of the demolished object does not occur between the side sheet 22B and the side surface of the high-rise building B.

When the roofing material 20 is mounted on the mast 10 as described above, the high-rise building B is disassembled.
Specifically, for example, a heavy machine H capable of dismantling the high-rise building B is placed on, for example, the top floor of the high-rise building B using the elevator shaft B1, and the high-rise building B is used from the inside of the high-rise building B using the heavy equipment H. Is disassembled (FIG. 5). Here, the range of the high-rise building B to be demolished is a range above the portion where the lower end of the side sheet 22B of the sheet material 22 is connected. When the high-rise building B is demolished, rubble is generated, and debris such as small concrete fragments and bolts may be scattered. However, even if the demolished material is scattered, it hits the sheet material 22 and stays in the high-rise building B and does not fall from the high-rise building B. In addition, when dismantling the high-rise building B in the range above the part to which the lower end of the side sheet 22B is connected, if it is decided to leave the outer wall of the high-rise building B and dismantle from the inside of the high-rise building B first, Since the outer wall of B itself plays a role of preventing the fall of the demolished product, the possibility of the fall of the demolished product can be further suppressed.
The debris generated by the dismantling of the high-rise building B is moved to the ground, for example, by being transported using the space in the elevator shaft B1. Alternatively, the rubble is lifted from the window portion 22A2 provided on the upper surface sheet 22A by, for example, a crane having a long arm placed next to the high-rise building B, and lowered to the ground. Also in this case, if the rubble is put in a suitable bag and lowered to the ground, the rubble can be prevented from falling from the high-rise building B. When the debris is lowered to the ground using the window portion 22A2, the number of the window portions 22A2 shown in FIG. 3 is one. However, for example, a plurality of window portions 22A2 necessary for performing such work are provided on the upper surface sheet 22A. Of course, it is also possible to provide it.
Even if it rains during the dismantling of the high-rise building B, or even if the roof of the high-rise building B has already been dismantled when it rains, Since the upper surface sheet 22A exists, rainwater does not affect the worker who performs work in the high-rise building B. In addition, rainwater generated by the rain falling on the top sheet 22A is drained through the drain pipe 32 as described above.
Eventually, the high-rise building B in a range above the portion where the lower end of the side sheet 22B is connected to the outer side is demolished at once (FIG. 6). The range that is demolished at a time is the range of the high-rise building B that is demolished before jackdown is performed.

When the high-rise building B in the range above the part to which the lower end of the side sheet 22B is connected is demolished, the length of each mast 10 is then shortened, and thereby the length of each mast 10 is shortened. Lower the material 20.
Prior to shortening the length of the mast 10, the connection of the lower end of the side sheet 22B to the side surface of the high-rise building B is once released.
In order to shorten the length of the mast 10, the sub-mast 11 constituting each mast 10 is removed. It is reasonable that the sub-mast 11 to be removed is either the uppermost or the lowermost sub-mast 11 constituting the mast 10. In this embodiment, the length of the mast 10 is shortened by removing the lowermost mast 11 among the multiple sub masts 11 constituting the mast 10.
In order to reduce the length of the mast 10, a jack 40 is used.
The jack 40 can be jacked down. As long as it is possible, the jack 40 may be a known or known one and may be a commercially available one. The jack 40 includes a main body 41 and a support member 42 that can move in the horizontal direction and the vertical direction with respect to the main body 41.
A method for removing the sub mast 11 at the lowest end from the mast 10 will be briefly described. The mast 10 before jackdown work is in the state of FIG. Next, in order to perform the jack-down operation, the connection between the lowermost submast 11 and the second submast 11 from the bottom is released, and the horizontally moved support member 42 is inserted between them (FIG. 7). (B)). Accordingly, the support member 42 supports the second sub mast 11 from the bottom and the mast 10 including the sub mast 11 thereon. Next, the lower submast 11 is removed (FIG. 7C). Then, by moving the support member 42 downward by the length of the removed sub-mast 11 (jacking down), the sub-mast 11 that was the second sub-mast 11 from the bottom before the jack-down is performed. Is the lower secondary mast 11. By moving the support member 42 horizontally and pulling it out from under the sub-mast 11 that is positioned at the lowest position, the lower end of the mast 10 is in the state of FIG. Such jackdown is preferably performed for each mast 10 simultaneously.

In this way, the length of the mast 10 is shortened. If necessary, the plurality of sub-masts 11 can be removed from each mast 10 by repeating the above jack-down operation.
When the length of the mast 10 is shortened, the roof material 20 is naturally lowered downward (FIG. 8). When the roof material 20 is lowered, the connection to the side surface of the high-rise building B at the lower end of the side sheet 22B is performed again. If the length of the drain pipe 32 becomes excessive, processing necessary for adjusting the length of the drain pipe 32, such as cutting the drain pipe 32 for the excess length, may be performed.
And the dismantling of the high-rise building B by the heavy machinery H is performed again. At this time, the range of the high-rise building B to be dismantled is the range above the portion where the side sheet 22B is connected to the outer surface of the high-rise building B as described above. And if the high-rise building B of the said range is demolished, jackdown as mentioned above will be performed and the roofing material 20 will be lowered | hung.
This is repeated to dismantle the high-rise building B from the top to the bottom.
All of the high-rise building B may be dismantled by the above method, or a predetermined range from the top of the high-rise building B is dismantled by the above method, and the lower-rise part is dismantled by another method such as an existing method. It is also possible.

As described above, the top sheet 22A of the roofing material 20 in this embodiment has an inclination that descends toward the center thereof. For example, a roof like a square roof as shown in FIG. It is also possible to make it a shape or a shape like a gable roof as shown in FIG.
Moreover, it is also possible to perform an appropriate device for providing, for example, watering equipment for melting snow on the top sheet 22A.

DESCRIPTION OF SYMBOLS 10 Mast 11 Submast 20 Roof material 21 Wall part 22 Sheet material 22A Upper surface sheet 22B Side surface sheet 22A1 Hole 22A2 Window part 23 Aggregate 32 Drain pipe 40 Jack B High-rise building B1 Elevator shaft H Heavy machinery

Claims (7)

It is a dismantling method for a high-rise building with a substantially rectangular solid shape,
A plurality of sub-masts, which are erected along the high-rise building and connected continuously in the length direction, are connected to appropriate locations around the high-rise building, and are initially approximately the height of the high-rise building. An upper surface sheet that covers the upper surface of the high-rise building, and a side sheet that covers a range in which the high-rise building is dismantled at once in the entire circumference of the side surface of the high-rise building, at or near the upper end of the mast having the same height. A sheet material fixing process for fixing the sheet material so that the edge of the side sheet contacts the entire circumference of the outer surface of the high-rise building;
Dismantling process of disassembling the upper end side of the high-rise building in a range substantially corresponding to the side sheet when viewed from the side, from the inside of the high-rise building;
When the upper end side of the high-rise building in the range corresponding to the side sheet is dismantled by the dismantling process, by removing at least one submast from each mast, the length of the shortened mast Lowering the height position of the sheet material, the sheet material lowering process,
Contains
By alternately repeating the dismantling process and the sheet material lowering process, dismantling the high-rise building from top to bottom,
Demolition method for high-rise buildings. The sheet material lowering process is:
The supporting means of the jack having the supporting means capable of supporting the second mast from the bottom among the sub-masts included in each mast and capable of moving downward, included in each mast By supporting the second from the bottom of the sub mast, removing the sub mast under the sub mast supported by the support means in that state, and lowering the support means, Including the step of removing one of the secondary masts from the mast,
The dismantling method of the high-rise building of Claim 1. The dismantling process is
Including a process of dropping debris generated by dismantling the high-rise building to the basement via an elevator shaft provided in the high-rise building,
The dismantling method of the high-rise building of Claim 1. An opening / closing part that can be opened and closed is provided at a predetermined part of the top sheet,
The dismantling process is
Including the process of lifting the debris generated by dismantling the high-rise building from the opened opening and closing unit by a crane and dropping it on the ground.
The dismantling method of the high-rise building of Claim 1. Fixing each of the masts to the outer periphery of the high-rise building before the first dismantling process is performed,
The dismantling method of the high-rise building of Claim 1. The top sheet is made of a water-impermeable material, and is inclined so that a specific part which is a predetermined part thereof is lower than other parts,
Including a process of draining rainwater collected in the specific part through a pipe continuous from the specific part to the ground,
The dismantling method of the high-rise building of Claim 1. The sheet material is stretched over an aggregate that maintains its shape by supporting the sheet material, thereby forming a tent by the sheet material and the aggregate.
The dismantling method of the high-rise building of Claim 1.

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