JP7333681B2 - Upward scattering prevention curing system and upward scattering prevention curing method when demolition of multi-story building - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upward scattering prevention curing system and an upward scattering prevention curing method when demolishing a multi-story building that can be installed and adjusted relatively easily at low cost.

2. Description of the Related Art As seen at demolition sites in urban areas, it is common to provide a temporary support structure around the perimeter of a building or the like in order to secure a working scaffold during demolition work. In addition to securing work scaffolding, temporary shelters are also used to install shields such as sheets that cover the entire side of the building to be demolished for the purpose of protecting against falling, preventing dust from scattering to the outside, soundproofing, etc. Sometimes.

For example, temporary shelters are generally installed only on the sides of buildings that are being dismantled. A building has also been developed that has a roof that covers the upper part of the building to make the construction site on the upper part of the building weatherproof. In order to install a temporary shelter equipped with a roof in this way, before the lower part of the building is constructed, the part that covers the side of the building of the temporary shelter must be framed with scaffolding material, pipe truss material, etc. After that, the roof is erected.

For example, in Patent Document 1 below, the problem to be solved is to provide a temporary shelter roof that allows work to be performed smoothly and safely, and that can shorten the construction period for assembling a temporary shelter. An invention is disclosed covering the building of time. According to this, a roof of a temporary support that is provided so as to cover a building under construction and is gradually rebuilt upward as construction progresses, wherein the roof is defined in the continuous direction of the roof a plurality of channel members provided at regular intervals; a plurality of rail members stretched between the channel members adjacent to each other in the continuous direction of the roof; It is described that it is composed of a plurality of frame members that are combined and extend substantially parallel to the frame members, and a flexible roof sheet that is attached between the adjacent frame members and has flexibility. . However, Patent Document 1 is an invention that provides an all-weather roof sheet for stacking upwards during building construction. sometimes not available.

Further, in the following Patent Document 2, when dismantling a building using asbestos molded plates, if work is performed by removing bolts one by one so that the asbestos molded plates will not crack at all, such work is described. The work is dangerous, takes too much time and costs, and is practically impossible. In order to reduce the cost, when demolishing a building using heavy machinery such as an excavator or impact tools such as a hammer, An invention has been disclosed for the purpose of solving the problem that the asbestos molded plate always cracks and the asbestos contained inside scatters around.

According to this document, when dismantling a building in which the asbestos molding plate is used, it provides a method for preventing asbestos scattering during demolition of the asbestos molding plate, which can reliably prevent scattering of asbestos. When dismantling a building in which boards are used for the roof, ceiling, walls, etc., a sheet is placed on the scaffolding set up on the side circumference of the building, and the side circumference of the building is sealed and cured, and the asbestos It describes destroying the asbestos molded plate after spraying the anti-scattering chemical onto the molded plate.

With such a configuration, when dismantling a building in which asbestos molded plates are used for the roof, ceiling, walls, etc., the scaffolding set up on the side of the building is covered with a sheet to seal the side of the building. However, after spraying the asbestos molded plate with the anti-scattering chemical solution, the asbestos molded plate is destroyed. In addition, during the demolition, the asbestos molded plates are sprayed with anti-scattering chemicals to prevent scattering. It is said that since the asbestos is sealed and cured, the asbestos will not scatter to the outside, and the building can be dismantled satisfactorily while ensuring safety.

In addition, by covering the windows of the building and the floor between the perimeter of the building and the scaffolding with sheets to protect the asbestos from scattering from the windows, the asbestos on the floor can be prevented. It is said that it can surely prevent the water from flowing into the gutter. Furthermore, according to Patent Document 2 below, even when the asbestos molding plate is destroyed, the scattering prevention chemical solution is sprayed in the air in the building, so even if the asbestos molding plate cracks during the destruction work and the asbestos scatters, It is stated that it is possible to prevent airborne dust of asbestos from scattering outside. In addition, by coating the sheet with anti-scattering chemical solution after dismantling work, there is a possibility that asbestos adheres to the sheet for sealing curing. It is described that scattering can be reliably prevented.

Further, Patent Document 3 below discloses that an economical tent-type roof for civil engineering work, which is easy to assemble and dismantle, can be easily stored in fine weather and stormy weather, and is used only in normal rainfall, is realized. ing. The tent roof consists of one main pole 1 erected on the ground, at least three main pole ropes 3 radially arranged from the top of the main pole, and a ring body inserted through the main pole 1. 2, a mountain-shaped sheet 4 in which a circular hole provided at the vertex is joined to the outer periphery of the ring body 2, tent support ropes 5 radially arranged along the ridgeline of the sheet 4 from the ring body, and main pole ropes. 3 and the tent support ropes 5, and an anchor base 9 for connecting the lower ends of the tent support ropes 5 to the ground;

At a building demolition site, special care must be taken to prevent the generation of scattered objects when the building is close to private houses, sidewalks, roadways, or railroad tracks. In particular, in recent years, social awareness and attention to safety have increased, and it is desirable to avoid injury to passers-by due to flying debris and damage to vehicles, such as those traveling in the vicinity, due to flying debris. In addition, if debris scatters on the tracks from the dismantling site near the tracks of the Shinkansen, etc., the Shinkansen will stop and safety inspection work will be carried out afterwards, and the impact will be extremely large. It can be said.

JP-A-10-131507 JP 2007-063784 A JP-A-06-123174

When dismantling a building, there is a tendency for the working time to be greatly restricted compared to the time of construction, and it is often required to complete the work in an extremely short time. Since the work of crushing and pulverizing with a etc. is essential, it is more important to protect against the scattering of broken pieces and scattered objects such as bolts. Conventionally, from the viewpoint of ease of installation and securing of working space for heavy machinery, etc., scattering prevention curing in this case was conventionally performed only on the side of the building to be demolished or only on the extension of the side.

However, in reality, fragments, bolts, and the like may also scatter in the upper space. However, at a demolition site where the walls and floors of the upper floors are gradually crushed and the demolition floors are gradually shifted downward to the lower floors, it is conventionally difficult to appropriately provide anti-scattering protection above (overhead). It is difficult in practice because it requires an extremely large amount of labor and cost. In other words, it was practically difficult to set the overhead protection at an appropriate height for the position of the dismantling work at that time, as needed, for a demolished building whose height was being demolished from the upper floors. . If a dedicated support pier for installing the overhead protection or a dedicated scaffold to lock the protection sheet is provided, the cost and work time will increase significantly, which is not realistic and the footing is complicated. Such installation work is also dangerous at the dismantling site where it tends to be.

In addition, for example, dismantling scaffolds (piguet scaffolds, wedge-type scaffolds, curing scaffolds) provided on the outer wall surface for workers, etc. are assumed to support the weight of humans and light tools, and are easy to assemble/remove. Since it is a temporary scaffolding, it naturally does not have the supporting force to suspend the ceiling roof covering sheet and stretch the sheet over the entire ceiling. In particular, in medium-sized and large-sized multi-story buildings, etc., such measures are impossible because the floor area is generally large, and the distance and interval between the side walls is large.

It is also conceivable to use the pillars remaining in the building as intermediate pillars to support the overhead curing sheet. Since it is necessary to attach and detach the curing sheet, it is dangerous and requires a great deal of time and labor. Furthermore, the elevating scaffolding in this case is to be assembled from the demolition floor, and in reality it is not possible to secure a passage on the demolition work floor where heavy machinery, dismantling tools, workers, etc. are present and carry the elevating scaffolding to the pillars. Extremely difficult. In addition, when dismantling the pillar itself, the pillar cannot be used as a pillar to support the curing sheet, and there are many restrictions such as difficulty in adjusting the height of the pillar. can't

In addition, although it is possible to prevent and reduce the scattering of dust, etc., to some extent by spraying water on the crushing site, relatively large crushed pieces accompanying the crushing and dismantling work of reinforced concrete, etc. It is also conceivable that metals such as bolts and nuts that are exposed to the impact are thrown diagonally upward and scattered while receiving the impact energy of crushing and pulverization.

The present invention has been made in view of the above-mentioned problems, and can easily and safely provide anti-scattering covering covering the upper part of a multi-layered building to be demolished according to the progress of demolition with relatively low cost and less labor. It is an object of the present invention to realize an upward scattering prevention curing system and an upward scattering prevention curing method that can be installed appropriately. Another object of the present invention is to propose an upward scattering prevention curing system and an upward scattering prevention curing method when dismantling a multi-storey building that can sufficiently secure working space for operation of heavy machinery and demolition work.

The upward scattering prevention curing system of the present invention is an upward scattering prevention curing system that prevents the scattering of crushed materials upward from the demolished floor during the demolition of a multi-story building. A work scaffold protruding higher, a curing sheet support column fixed to the work scaffold so as to protrude higher than the work scaffold, and a scattering prevention curing moored to the curing sheet support column so that the degree of suspension can be adjusted. and a sheet, by moving the curing sheet support column downward along the work scaffold when the work scaffold is gradually removed from above corresponding to the progress of demolition from upper floors to lower floors; The height of the anti-scattering curing sheet is the height at which heavy equipment can dismantle on the next demolition floor.

Further, the upward scattering prevention method of the present invention is a method for preventing upward scattering using an upward scattering prevention curing system, in which the dismantling floor is dismantled with a heavy machine in a state where the scattering prevention curing sheet is stretched upward; The first step is to dismantle the outer wall of the building on the first side to lower its height. a third step of demolishing the outer wall on the second side facing the first side of the building to be demolished to lower its height; A fourth step of lowering to lower the height thereof, and a fifth step of lowering the height of the curing sheet support columns fixed to the lowered first side work scaffold and the second side work scaffold. have.

Realization of an upward scattering prevention curing system and an upward scattering prevention curing method that can be installed appropriately according to the progress of demolition, easily and relatively inexpensively with little labor. can.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the structural outline of the upward scattering prevention curing system of embodiment. It is a figure explaining the progress process of the demolition work using the upper scattering prevention curing system of this embodiment in order of a figure number. It is a figure explaining the progress process of the demolition work using the upper scattering prevention curing system of this embodiment in order of a figure number. It is a figure explaining the progress process of the demolition work using the upper scattering prevention curing system of this embodiment in order of a figure number. It is a figure explaining the progress process of the demolition work using the upper scattering prevention curing system of this embodiment in order of a figure number. It is a figure which observes from upper direction and demonstrates the typical example which divides|segments a demolished building into three area|regions (A), (B), and (C), and suspends a scattering prevention curing sheet for every area|region. FIG. 7 is a diagram for explaining a work process for lowering a curing sheet collectively for each area of a floor divided into a plurality of areas as shown in FIG. 6 ;

FIG. 1 is a diagram illustrating an outline of the configuration of an upward scattering prevention curing system 1000 according to an embodiment. The upward scattering prevention curing system 1000 described in this embodiment covers the overhead of a multi-story building with the scattering prevention curing sheet 1100, but the skeleton (demolition building) that is gradually dismantled from the upper floor to the lower floor. Since it is not supported against 1400, it does not interfere with the demolition work. In addition, since the scattering prevention curing sheet 1100 is not directly connected to the working scaffold 1200, even if the working scaffolding 1200 is gradually dismantled and removed from above according to the progress of dismantling the skeleton 1400, the scattering prevention curing sheet 1100 will not be removed. There is no need for time and effort for connection removal and attachment. Therefore, the dismantling work can be carried out very efficiently and safely. The drawn portion of the skeleton 1400 shown in FIG. 1 is the remaining outer wall projecting upward from the remaining uppermost floor of the building to be demolished.

As shown in FIG. 1, the upward scattering prevention curing system 1000 includes a working scaffold 1200 supported by wall ties (hereinafter simply referred to as wall ties) 1300 without touching the skeleton 1400 of the building to be dismantled. The wall tie 1300 is provided at the upper end of the outer wall of the uppermost layer of the skeleton 1400 remaining at that time, and lightly supports the work scaffold 1200 so that it does not fall down. The working scaffolding 1200 is usually installed in a form in which a plurality of steps are stacked and stacked, and typically has a height of 1.8m per step, and two steps of 3.6m and one floor of the frame 1400. It is equivalent to the height of 1 minute (one floor).

In addition, from the viewpoint of safety, etc., the law stipulates that the number of steps of the self-supporting work scaffolding 1200 that can be placed above the wall ties 1300 is two or less. The number of stages of the work scaffold 1200 that can be extended upward from the upper end of the outer wall of the uppermost layer is three in total, including the wall connecting stages, and the height is about 5.4 m.

In the upward scattering prevention curing system 1000 shown in FIG. 1, the curing sheet support poles 1130 are locked at a plurality of positions over a plurality of stages by clamps or the like in the vertical direction along the skeleton 1400 side of the work scaffold 1200 . Although FIG. 1 shows an example in which the curing sheet support column 1130 is connected and fixed with a clamp over the working scaffold 12005, it is not limited to this. The curing sheet support column 1130 can be vertically slid downward along the working scaffold 1200 by loosening the clamp on the working scaffold 1200 . Although FIG. 1 does not particularly show a guide mechanism, a guide string, or the like for sliding the curing sheet support column 1130 downward, they may be additionally provided as appropriate.

In addition, as can be understood from FIG. 1, the curing sheet support column 1130 projects slightly upward from the upper end of the working scaffold 1200, and the messenger wire 1130 is attached to the front end of the work scaffold 1200 via a clamp or shackle 1120 or the like. I support 1110. The messenger wire 1110 extends downward along the curing sheet support column 1130 together with the anti-scattering curing sheet 1100 deployed overhead. Next to the frame 1400 near the lower side of the wall joint 1300 below the curing sheet support column 1130 , it is locked in a tensioned state by a lever block (registered trademark) and locked to the curing sheet support column 1130 .

In this case, by manually loosening or tightening the messenger wire 1110 or the like using a lever block, the tension of the overhead scattering prevention curing sheet 1100 can be loosened or tightened freely. Even when the wall ties 1300 are removed and the upper end of the outer wall of the frame 1400 is dismantled, the curing sheet support columns 1130 are free and not connected to the frame 1400 and the wall ties 1300. The dismantling work of the upper end of the outer wall can be performed without adjusting the sheet 1100.例文帳に追加

Furthermore, after the dismantling of the upper end of the outer wall of the skeleton 1400 is completed, even when dismantling and removing, for example, two steps located at the upper end of the working scaffold 1200 in order to comply with the law of the self-supporting scaffold, the two steps of the working scaffold to be removed can be removed. and the curing sheet support column 1130 are released from the clamp fixation, removal work is possible. Even in this case, as shown in FIG. 1, the curing sheet support columns 1130 are clamped to the remaining three lower working scaffolds, so the scattering prevention curing sheet 1100 is maintained as it is without any change. In this state, the work scaffold can be dismantled and removed in two stages.

Then, after the two-stage dismantling and removal of the working scaffold is completed, it is preferable to lower the curing sheet support column 1130 for each fixed area. The anti-scattering curing sheet 1100 remains stretched even during the hanging work of the curing sheet support column 1130, but it can be loosened as appropriate depending on the work. When the curing sheet support column 1130 is lowered, the height of the anti-scattering curing sheet 1100 supported on the upper tip of the column is naturally lowered. The skeleton 1400, which is the dismantled building, has a certain floor area, and the scattering prevention curing sheet 1100 is supported only by the curing sheet support columns 1130 provided on its four sides. It is preferable to carry out the work of lowering the entire floor at the same time, or divide the floor into a plurality of areas and carry out the work for each area.

In FIG. 1 , the main parts of the entire upper scattering prevention curing system 1000 are partially enlarged for convenience of explanation, but the work scaffold 1200 is usually on all four sides of the skeleton 1400 and all the outer walls. It goes without saying that it is preferable to cover the entire skeleton 1400 by curing it in the dismantling work of the skeleton 1400 as a whole. When the anti-scattering sheet is stretched over the demolished building with multiple floors, the height of the building will decrease as the dismantling progresses, so it is necessary to lower the anti-scattering sheet accordingly. However, it has been a long-standing issue to reduce the labor and man-hours of this hanging work. In this embodiment, it is sufficient to hang down the support columns that are free from the frame along the work scaffold, and the curing sheet can be raised and lowered extremely easily as the dismantling progresses, and the sheet can be freely tensioned and loosened. It is possible. In addition, at a demolition site where two different types of work are mixed: demolition work using heavy machinery and manual work such as replacement of wall ties and removal of work scaffolds, manual work such as hanging curing sheets can be performed by heavy machinery. It is preferable because it can be easily performed without bending.

2 to 5 are diagrams for explaining progress steps of demolition work using the upward scattering prevention curing system 1000 of the present embodiment in the order of figure numbers. First, as shown in FIG. 2(a), a working scaffold 1200 is installed around the outer wall of the building 2200 to be demolished so as to surround all four sides of the building. The height of the work scaffold 1200, as shown in FIG. The self-supporting scaffold is two steps). In addition, the working scaffold 1200 has a curing sheet support post 1130 vertically clamped to the inner side of the working scaffold 1200 .

In this case, it is preferable that the work scaffold 1200 to which the curing sheet support column 1130 is clamp-fixed is fixed over five stages from above. Also, a heavy machine 2100 is arranged on the roof floor 2220, and the penthouse 2210 existing on the roof floor 2220 is dismantled by the heavy machine. Also, although not shown in FIG. 2(a), if it is desired to more reliably prevent upward scattering even when the penthouse 2210 is dismantled, a curing sheet may be stretched over the curing sheet support pillars 1130 at this point. good. However, as can be understood from FIG. 2(a), at the height position of the curing sheet support column 1130 shown in FIG. Have difficulty. Therefore, the curing sheet support column 1130 can be protruded further upward than the position shown in FIG. 2( a ) to stretch the curing sheet (not shown).

Next, as shown in FIG. 2(b), the floor slab on the roof floor 2220 is partially dismantled, and the heavy equipment 2100 is moved to the 13th floor 2230 directly below the roof floor 2220 from the spatial part of the dismantled floor slab. Place it down. Then, the scattering prevention curing sheet 1100 and the messenger wire 1110 are stretched over the curing sheet support column 1130 . In this case, a height of about 9000 mm is secured from the 13th floor floor 2230 where the heavy machinery 2100 is arranged to the scattering prevention curing sheet 1100, so the work space height of the heavy machinery 2100 is sufficiently secured. . Then, with the anti-scattering curing sheet 1100 stretched, all the floor slabs of the roof floor 2220 are dismantled by a heavy machine 2100 while leaving the outer wall. A single tube pipe can be used for the curing sheet support column 1130, and Dionet (registered trademark) can be used for the anti-scattering curing sheet 1100. FIG. The curing sheet support columns 1130 are net columns and also have the function of reinforcing the building site.

Next, as shown in FIG. 3A, the floor slab on the 13th floor 2230 is partially dismantled by the heavy machinery 2100, and the heavy machinery 2100 is lowered from the demolition space to the 12th floor 2240 immediately below. In this state, the floor slab of the 13th floor 2230 is completely dismantled by the heavy equipment 2100, leaving only the outer wall. In FIG. 3(b), all the floor slabs on the 13th floor 2230 have been dismantled, and the heavy machinery is placed on the 12th floor 2240. 12000mm is secured.

Then, as shown in FIG. 3(b), one outer wall 2231a of the 13th floor floor 2230 is collapsed by the heavy machine 2100 and demolished. In this case, as can be understood from FIG. 3(b), it is preferable that the outer wall remains projectingly for two floors at the time of starting the demolition by falling down the wall. As a result, the height of the upper end of the two-tiered self-supporting scaffold provided via the wall joint 1300 on the outer wall is maintained high. The height of 1100 is sufficiently ensured.

Next, as shown in FIG. 4(a), the work scaffold 1200 outside one of the outer walls 2231a is dismantled and removed from above in two stages. Also, during this work, the replacement installation of the wall joint 1300 on the upper end of the outer wall of the 12th floor floor 2240 and the two-stage dismantling and removal of the work scaffolding 1200 can be performed together on this occasion. That is, in the demolition work using the heavy machinery 2100, manual work can be performed collectively at the same time, which is extremely efficient and highly safe. As can be understood from FIG. 4( a ), even if the uppermost self-supporting scaffolding of the working scaffold 1200 is removed in two stages, the curing sheet support columns 1130 are still clamped over the working scaffolding 1200 for three stages. Therefore, there is no effect on its supporting function and supporting strength.

In addition, as shown in FIG. 4(a), the other outer wall 2231b of the 13th floor 2230 is also dismantled by knocking down the wall in the same manner, and the wall joint 1300 is replaced with the upper end of the outer wall of the 12th floor 2240, as shown in FIG. As shown in b), the uppermost stage of the work scaffold 1200 is dismantled and removed by two stages. Demolition by knocking down an outer wall is relatively easy to generate scattering objects, and the work position is higher than the floor, and the overall dismantling work is accompanied by the scattering of crushed objects at a relatively high place. However, since the anti-scattering curing sheet 1100 is stretched at a sufficiently high position above, it is possible to prevent the scattering of debris from scattering outside beyond the dismantling site. In addition, the height of the anti-scattering curing sheet 1100 is maintained at a height sufficient to secure the work space for the heavy machinery 2100, which is preferable because the working efficiency is not impaired.

When all the outer walls of the 13th floor floor 2230 have fallen down and collapsed, as shown in FIG. That is, the clamp fixation to the work scaffold 1200 is loosened and the curing sheet support column 1130 is lowered as it is. The scattering prevention curing sheet 1100 may be lowered after being loosened as appropriate, but the scattering prevention curing sheet 1100 itself can be easily lowered while being stretched without withdrawal or storage. .

Even when loosening the sheet tension, the lever block 1140 is positioned near the wall joint 1300 as described in FIG. be. At the position where the work scaffold 1200 corresponding to the two steps is lowered, the curing sheet support column 1130 is clamped again over the five steps of the work scaffold 1200 . This work may be performed after all the outer walls of the entire 13th floor 2230 of the building to be demolished 2200 have been collapsed, or if the floor area of the building to be demolished 2200 is large, the 13th floor 2230 may be divided into several areas. It is also possible to divide the process into three areas and perform the process for each area. By repeating the above-described work process, the dismantling work and the work of lowering the curing sheet are linked and can be carried out efficiently and safely toward the lower floors.

FIG. 6 shows a typical example of dividing the demolished building 2200 into three areas (A), (B), and (C), and suspending the anti-scattering sheet 1100 for each area, observing from above. It is a figure to do. Such a method is preferable from the viewpoint that the number of stages of a so-called self-supporting scaffold is limited by laws and regulations. That is, as described with reference to FIGS. 3(b) and 4(a), measures are taken to quickly reduce the number of stages of the self-supporting scaffolding in response to the height of the wall becoming lower due to the collapse of the wall. Since the anti-scattering curing sheet 1100 is supported by at least a pair of working scaffolds 1200 facing each other via the curing sheet support pillars 1130, the curing sheet can be quickly lowered when the self-supporting scaffolding is dismantled. is preferable from the viewpoint of safety.

On the other hand, lowering the curing sheet narrows the upper work space, so it is desirable to lower it when the height difference is sufficiently secured according to the progress of dismantling downward. The most balanced approach to addressing these complex needs is a territorial approach. In the case of the demolished building 2200 with a large floor area, it takes a considerable amount of time and man-hours to dismantle the outer wall of the entire floor, and the area and weight of the anti-scattering curing sheet 1100 are large. It is not very preferable to keep supporting the curing sheet support column 1130 for a long time by clamping to the work scaffold 1200 with less work.

Therefore, it is possible to support the scattering prevention curing sheet 1100 in a state where the curing sheet support column 1130 is projected above the work scaffold 1200 by two steps or more (typically 3.6 m or more). In order to make it as short as possible, one floor is divided into multiple areas, and when the wall-downing dismantling in each area and the two-stage dismantling and removal of the work scaffold are completed, the curing sheet support column 1130 is lowered and lowered for each area. shall be performed. As shown in FIG. 6, when the work of falling down the wall (1) → falling down the wall (2) → falling down the wall (3) is completed for the area (A), the curing sheet in the area (A) is lowered. For (B), when the work of falling down the wall (4) → falling down the wall (5) is completed, the work of hanging the curing sheet in the area (B) is performed, and in the area (C) the wall falling down (6) → falling down (7) ) → When the work of falling down the wall (8) is completed, the work of hanging the curing sheet in the area (C) is performed.

FIG. 6(b) is a diagram illustrating a state of observing the work scaffold 1200 and the scattering prevention curing sheet 1100 from the AA' side shown in FIG. 6(a). As shown in FIG. 6(b), when the collapse of the wall in the area (A) is completed, the scattering prevention curing sheet 1100 in the area (A) is moved from the position 1100a to the position 1100b together with the curing sheet support column 1130. shall be auctioned off. Although not shown in FIG. 6(b), for locations where the work platform 1200 exists at a position higher than the upper end of the outer wall, not only overhead but also work platform It is assumed that the anti-scattering curing sheet 1100 is stretched up to the inside of 1200 .

In addition, regarding the boundary part between the area (A) and the area (B), since the dismantling work by the heavy equipment 2100 remains for the part of the area (B), the scattering prevention curing sheet 1100 is stretched upward without lowering it. It shall be hung. As a result, the scattering prevention curing sheet 1100 can be stretched over the entire region (B) to secure a dismantling work space. In addition, even when the heavy equipment 2100 is used for demolition work in the area (B), since the scattering prevention curing sheet 1100 hung down in the area (A) remains as well as above it, It is also possible to prevent the crushed materials from scattering to the outside.

7A and 7B are diagrams for explaining a work process for lowering a curing sheet collectively for each area of the floor divided into a plurality of areas as shown in FIG. 6 . Based on the flow shown in FIG. 7, the steps will be sequentially described below.

(Step 710)
The top n floors (floor slabs) remaining in the demolished building 2200 are demolished by the heavy machinery 2100 . For example, if the thirteenth floor 2230 remains, the heavy machinery 2100 dismantles the thirteenth floor 2230 . In this case, the heavy machine 2100 is lowered to the twelfth floor 2240 according to the progress of demolition of the floor slab.

(Step 720)
When the dismantling of the floor of the nth floor is completed, any one side of the outer wall of the area (A) of the nth floor is knocked down and dismantled. For example, when the demolition of the floor slab on the 13th floor 2230 is completed, the entire outer wall surface of the 13th floor 2230 shown as wall overthrow (1) in FIG. 6(a) is demolished. In this case, since the floor slab on the 13th floor 2230 does not exist, the outer wall of the 12th floor 2240 and the 13th floor 2240 remain in the state where the outer walls of the 12th floor 2240 and the 13th floor 2230 remain. Only the outer wall corresponding to one floor of the floor 2230 is knocked down and dismantled.

(Step 730)
In step 720, for the area (A) of the nth floor, dismantle and remove the top two self-supporting scaffolds of the work scaffold 1200 corresponding to the entire outer wall. For example, the uppermost two steps of the self-supporting scaffolding corresponding to the outer wall of the 13th floor 2230 are removed.

(Step 740)
By repeating steps 720 and 730 for all exterior wall surfaces existing in the n-th floor area (A), all the exterior walls of the n-th floor area (A) are knocked down and dismantled. For example, in the area (A) of the 13th floor 2230 of the demolished building 2200, when all the "outer walls of the 13th floor 2230" have been knocked down and the 2-step self-supporting scaffolding has been dismantled and removed, the process proceeds to step S750.

(Step 750)
The work of hanging the anti-scattering curing sheet 1100 is performed for the entire region (A). In this way, it is preferable to lower the scattering prevention curing sheet 1100 all at once for one floor, or for each divided area when one floor is divided into a plurality of areas. For example, if the curing sheet is lowered only for that one side when the wall falling and the self-supporting scaffolding removal is completed for only one arbitrary side of the outer wall, the height balance of the curing sheet supported by the peripheral part of the demolition building 2200 will be lost. It collapses and the curing sheet above the work space cannot be maintained substantially horizontally.

(Step 760)
Steps 720 to 750 are also performed for other remaining areas on the nth floor to complete the work of lowering the curing sheet for all areas.

(Step 770)
If there is no (n-1) floor, which is a lower floor, this flow ends, and if there is an (n-1) floor, the process proceeds to step 780 .

(Step 780)
The (n-1)th floor, which is the lower floor, is used instead of the nth floor, and steps 710 to 760 are performed for the (n-1)th floor based on the above description. This flow ends when dismantling is completed for all hierarchies.

The upward scattering prevention curing system of the present invention is an upward scattering prevention curing system that prevents the scattering of crushed materials upward from the demolished floor during the demolition of a multi-story building. A work scaffold protruding higher, a curing sheet support column fixed to the work scaffold so as to protrude higher than the work scaffold, and a scattering prevention curing moored to the curing sheet support column so that the degree of suspension can be adjusted. and a sheet, by moving the curing sheet support column downward along the work scaffold when the work scaffold is gradually removed from above corresponding to the progress of demolition from upper floors to lower floors; The hanging height of the anti-scattering curing sheet is set to a height at which heavy machinery can perform dismantling work on the next dismantling floor.

As a result, there is no need to provide support columns or structures for supporting the anti-scattering curing sheet on the demolished floor itself, so the demolished floor becomes flat and visibility is improved, and the demolished floor can be smoothly dismantled. Become. In addition, since it is not necessary to adjust the height of the structure, which is essential when supporting columns and structures are installed on the floor to be demolished, and to suspend and lower the structure, work efficiency can be improved even when floors are demolished using heavy machinery. practically feasible. Since the mooring of the anti-scattering curing sheet and the curing sheet supporting pole is not released, the work is lowered as it is, so that the working time can be shortened. In addition, since there is no need to provide a curing sheet support column on the demolished floor or the like, it does not interfere with the floor demolishing work using heavy machinery, and workability is good.

In addition, the structure to be demolished, such as the outer wall and floor of the building to be demolished, is naturally dismantled sequentially from the top to the bottom. As the dismantling progresses, the height of the building is gradually lowered, and it is customary to gradually remove it from above so as to match the building. For this reason, from the viewpoint of smooth progress of dismantling work, it is preferable to avoid directly stretching the scattering prevention curing sheet over the demolition building or work scaffold. If the curing sheet is directly stretched over the demolished building, pillars, outer walls, etc., it will require a lot of labor and dangerous work to replace, remove, adjust the height of, and replace the curing sheet at the time of dismantling. becomes. In addition, if the curing sheet is directly stretched on the work scaffold, the curing sheet must be removed when the work scaffold is dismantled or removed, and then re-strung separately on another work scaffold below. is required, resulting in extremely poor work efficiency.

For this reason, in the present invention, the scattering prevention curing sheet is supported and stretched by the curing sheet support poles, and the curing sheet support poles are preferably clamped to the work scaffold over four or more stages from above. etc., shall be fixed. As a result, even when the top two stages of the work scaffold are removed and the height is gradually lowered, the curing sheet support pillars do not need to be moved at that point, and the curing sheet is stretched over the curing sheet support pillars. can be done. In addition, when lowering the curing sheet support column after that, loosen the tension of the curing sheet to some extent, and slide the support column against the loosened clamp, etc., so that it moves downward toward the work scaffold (for example, It is possible to lower the height of the curing sheet by lowering the working scaffold by two steps.

In addition, in the present invention, since the curing sheet support columns are not fixed or supported to the outer wall or columns of the building to be demolished, the outer wall can be dismantled efficiently without interrupting the work. If the curing sheet supporting columns are fixed to the outer walls and columns of the dismantled building to support the curing sheets, the outer walls and columns of the dismantled building will be used for purposes other than those originally intended for the building. It is not a smooth and efficient demolition work because it requires considerable cost, labor, and time by using a crane to fabricate reinforcing jigs to reinforce the columns and attach the jigs to the columns.

In addition, if the curing sheet support columns are fixed to the outer walls and columns of the dismantled building using bolts and anchors, metal protrusions (various wires, bolts, nuts, etc.) and various irregularities existing on the outer walls and columns will be removed. In many cases, it becomes an obstacle to installation, and processing work for the pillar such as removal of unevenness will also occur. In addition, since the exterior walls and interior walls are to be dismantled themselves, it is necessary to replace the bolts, etc. on the exterior walls, etc. by hand (replacement work) before dismantling. This is not preferable from the viewpoint of efficiency and safety.

In the present invention, typically, a set of overhead scattering prevention curing sheets that are moored to the curing sheet support poles so as to be able to be stretched and adjusted can be set according to the progress of demolition of the building without releasing this set. The curing sheet support column shall be gradually lowered along the working scaffold while maintaining it as a whole. As a result, the curing sheet is not supported by the building/outer wall to be demolished, so the demolition work can be carried out efficiently and smoothly.

In addition, the upward scattering prevention curing system of the present invention is preferably characterized in that the curing sheet support columns are clamped at a plurality of locations with respect to the work scaffold.

Typically, it is stable if the support columns are fixed at multiple locations across four or more stages of the work scaffold with clamps, and by loosening the clamps a little or releasing some of them, the curing sheet support columns can be used for work. It is also relatively easy to slide down along the scaffold. And, even during such work, it becomes possible to maintain a state in which overhead protection is ensured and maintained. Moreover, the fixing method of the plurality of locations is not limited to clamp fixing, and any known fixing method may be adopted.

Further, in the upward scattering prevention curing system of the present invention, more preferably, the tension wire of the scattering prevention curing sheet is extended downward along the curing sheet support pillar from the mooring point to the curing sheet support pillar. characterized in that its ends are fixed to the

The mooring point of the anti-scattering curing sheet to the curing sheet support column may typically be a clamp, shackle, wheel, or the like provided at the upper end of the support column. In addition, the scattering prevention curing sheet is provided with a tension wire, and the tension wire is lowered along the curing sheet support pillar from the top of the curing sheet support pillar via a metal wheel, pulley, etc. It may be fixed by a lever block or the like at an arbitrary location below the support column. For example, by loosening or tightening the tension wire with a lever block, it is possible to appropriately adjust the tension strength of the anti-scattering sheet and the degree of overhead deflection.

Further, the anti-splash curing system of the present invention is further preferably characterized in that the tension wires include messenger wires. The use of a messenger wire facilitates the tension and relaxation of the wire tension, and the rings and loops at the ends of the curing net that are hung on it also become easy to move along the messenger wire. With the messenger wire stretched, it is also possible to collect and put only the curing net at the edge like a curtain or awning. For example, during storms such as typhoons, in order to avoid damage to the curing net and damage to the work scaffolding and to ensure the safety of the surroundings, only the messenger wire is left in a stretched state, and only the curing net is left at the end. It is also possible to store it compactly so that it is not blown by the wind. The tension wire may be a messenger wire only, a fixed wire only, or a configuration in which a messenger wire is provided in parallel with the fixed wire.

Further, the upward scattering prevention curing system of the present invention is further preferably characterized in that the ends of the tension wires are lever blocks (registered trademark), and the tension is adjustable. It is preferable to use a lever block because the work of pulling and loosening the wire can be performed very easily and in a short time to an arbitrary extent. However, it is not limited to this, and other known wire tensioning jigs, tools, etc. can also be used. Alternatively, the wire can be wrapped around a hook or a pole and held at hand, like a flag pole system for raising a national flag, without using a wire hanging tool or the like.

Further, in the upward scattering prevention curing system of the present invention, it is more preferable that during floor demolition work, the height of the fixing point of the end of the tension wire to the curing sheet support pillar is the same as the working scaffold and the outer wall of the building to be demolished. It is characterized by a height corresponding to the wall joint that temporarily supports between the and.

The fixing points of the ends of the tension wires to the curing sheet support posts are preferably lever blocks as described above, but the height of the fixing points is the height corresponding to the wall tie of the highest floor. is preferably Buildings are dismantled in order from the upper floors, but usually, wall ties are installed at the top of the remaining outer walls of the building at that time, and the work scaffolds are supported by these wall ties. there is Therefore, in the vicinity of that height, it is preferable from the standpoint of work that the tension wire is stretched and fixed to the support column. In other words, the number of scaffolding steps that can be assembled above the wall ties is restricted to within two steps, and the two-step portion of the scaffolding will be dismantled at the time of the next step as the dismantling work progresses to the lower floors. is. For this reason, it is preferable to fix the wire using a lever block or the like at a position equal to or lower than the wall connection. Since there is a time lag between the dismantling of the work scaffolding and the work of lowering the protective net as the dismantling progresses to the lower floors, even when dismantling and removing the work scaffolding on the top two levels, the protective net is maintained as it is at the time of dismantling the scaffolding. It is preferable to be in a state where In other words, it is preferable that the height of the lever block at the time of fixing work is the height position where the skeleton of the building to be demolished (typically the above-mentioned outer wall) remains. If it is higher than that, the height of the dismantling scaffold will be the height as described above, and if it is lower than that, the workability will be considerably deteriorated. Since the lever block is for fixing the tension wire to the protective net support post, it is assumed that the protective net support post is naturally present at the fixing work height.

Further, in the upward scattering prevention curing system of the present invention, more preferably, during floor demolition work, the height of the fixed portion of the end of the tension wire to the curing sheet support column is higher than the height of the outer wall of the building to be demolished. is also at a low position. As a result, even when the work scaffolding located on the outer wall is dismantled as the construction progresses, the suspension wire can be stably fixed, which is preferable.

Further, the upward scattering prevention curing system of the present invention is more preferably characterized in that the scattering prevention curing sheet is stretched continuously and integrally from the upper side of the building to be dismantled to the upper side surface of the outer wall. The curing sheet on the ceiling is effective in preventing scattering of broken pieces, etc. upward or diagonally upward, but on the side, the outer wall has already been dismantled, and the work scaffolding is provided above the upper end of the remaining outer wall. exists. By stretching the curing sheet over the top of the upper end of such an outer wall, it is effective not only in the upward direction but also in the scattering of crushed matter to the side surfaces. The curing sheet support column can be installed and fixed at a place where there is a working scaffold above the remaining outer wall, so the curing sheet can be installed integrally from the top to the side via a tension wire. can be done. That is, there is no fear of scattering from the part where the outer wall remains, but it is preferable to provide a curing sheet so that scattered objects do not scatter laterally from the part where the outer wall exists after the outer wall is dismantled above it. .

Further, the upward scattering prevention method of the present invention is the upward scattering prevention method using any of the above-described upward scattering prevention curing systems, in which the demolition floor is moved by heavy machinery in a state where the scattering prevention curing sheet is stretched upward. The first step is to dismantle the outer wall on the first side of the building to be demolished to lower its height, and to lower the work scaffolding on the lowered outer wall side of the building to be demolished. A second step of lowering the height, a third step of dismantling the outer wall of the second side facing the first side of the building to be demolished to lower the height, and a second side whose height is lowered. A fourth step of lowering the working scaffold on the outer wall side to lower its height, and lowering the height of the cured sheet support column fixed to the lowered first side working scaffold and the second side working scaffold and a fifth step.

As a result, at least a pair of opposing outer walls, working scaffolds, and curing sheet support columns can be dismantled in an orderly manner without adversely affecting the demolition work, and the curing sheet can be lowered to or maintained at an appropriate height. It is possible to proceed with the work. In the first to fifth processes, the dismantling of the side walls of the building such as outer walls and work scaffolding are limited. ), etc. may exist. In addition, since there are three outer walls to be demolished at the corner of the demolished building, it is necessary to dismantle and lower the third outer wall, the work scaffolding, the supporting pillars of the curing sheet, and the curing sheet on the outside. However, it is preferable to proceed with the third outer wall in the same manner as the first to second steps or the third to fourth steps, followed by the fifth step. That is, floor demolition→outer wall demolition→scaffold demolition removal→collectively for each region, the curing sheet is lowered in this order. As a result, the dismantling work and the protective net adjustment can be performed smoothly and efficiently in sequence without interrupting the dismantling work or manually adjusting the protective net during the dismantling work.

In addition, the upward scattering prevention method of the present invention preferably separates the demolished floor into at least two areas, and each time the portion of the demolished floor corresponding to each area is demolished, the first step to the second step are performed for each area. It is characterized by performing five steps. In the embodiment, one floor is divided into three areas (area a, area b, area c), and dismantling and lowering of the curing sheet are set for each area (the above-mentioned first to fifth processes, etc.) It is preferable to use In the area where the outer wall has been dismantled, the working scaffolding (that is, self-supporting scaffolding) protruding above it is quickly dismantled for the corresponding number of steps, and the height of the working scaffold and the curing sheet support column (and curing sheet) fixed to it low is preferred. In particular, for work scaffolds, the number of steps that can be protruded from the outer wall is stipulated, and it is not possible to arbitrarily project more than 4 or 5 steps (However, the wall connecting steps are counted as the number of steps to project upward. do not have). Therefore, when the outer wall is dismantled and the height of the outer wall is lowered, it is necessary to quickly dismantle and remove the working scaffold corresponding to the dismantled outer wall to reduce the height of the scaffold. Here, since the curing sheet support columns are moored and fixed to the work scaffold with clamps, etc., the curing sheet support columns fixed to the dismantled and removed work scaffold are lowered further downward (typically vertically downward). However, since the curing sheet support columns are moored and fixed over two or more lower tiers, including the removed two tiers, the upper two tiers When the scaffolding is removed, the curing sheet support columns can still be maintained in a supported state. Then, detachment of the curing sheet support column and change of the mounting position can preferably be performed manually after dismantling the working scaffold. During this manual work, there is no need to stop the demolition work by the heavy machinery at least at the relevant location, so it is possible to minimize the time to stop the heavy machinery, which is preferable. While the demolition work by the heavy machinery is stopped, the demolition and removal of the working scaffold and the work of lowering the curing sheet may be performed manually simultaneously.

Further, the upward scattering prevention method of the present invention is more preferably characterized in that, at the time of starting the first step or the third step, the outer wall remains projecting from the remaining uppermost floor for an amount corresponding to two floors. As a result, it is possible to secure a working space for the heavy machinery with an extremely sufficient height, typically a space having a height of about 12 m. In addition, even when the heavy equipment remains projecting from the floor on which the heavy equipment is located, it is possible to maintain a working height of, for example, about 9 m, which is preferable. That is, typically, the work scaffold is held by wall ties without being attached to the remaining outer wall, and a scaffold for two steps is provided on the wall ties, and the curing sheet is stretched above the height of the scaffold top end. It has started (it may be bent and slightly lower near the center). For this reason, it can be said that a considerably wide height space is secured as a working space for heavy machinery, in spite of the fact that the curing sheet that can be freely lowered is stretched from the ceiling.

Further, the upward scattering prevention method of the present invention is more preferably characterized in that the lowered working scaffolding has no more than two independent scaffolding portions at the completion of the second step or the fourth step. This is preferable because it is possible to safely carry out the work in compliance with the regulations established from the viewpoint of work safety. In addition, during the progress of demolition work, at the moment when the height of the outer wall is collapsed, the number of steps of the self-supporting scaffolding will be larger than the regulation for a moment. It is preferable because it can be complied with.

Further, the upward scattering prevention method of the present invention is further preferably characterized by further comprising a step of temporarily loosening the tension of each scattering prevention curing sheet before performing the fifth step. As a result, the tensile strength of the tension wire is relaxed, making it easier for the curing sheet support pillars to move downward. Fixed mooring work becomes easier. In ^particular , high-quality, lightweight curing sheets have become available at relatively low prices in recent years. is becoming If such a curing sheet is used, clamp mooring of the curing sheet support column to the current work scaffolding is possible without any problem in terms of strength.

The anti-scattering curing system of the present invention is not limited to the description in the above-described embodiments and the like, and is appropriately improved within the scope obvious to those skilled in the art and within the scope of the technical ideas disclosed by the present invention, or / And it is possible to use them by appropriately combining them or arranging them. The tools and materials exemplified in this document can be appropriately replaced with other known tools and the like. Further, as is clear from the above description, the multi-story building of the present invention is not limited to having multiple floors only above the ground level, and can be applied to a one-story building above ground as long as it has a basement floor. It is sufficient if there are multiple floors.

INDUSTRIAL APPLICABILITY The present invention is suitable for a scattering prevention curing system or the like in which a scattering prevention curing sheet is provided overhead at a demolition site.

1000... upper scattering prevention curing system, 1100... scattering prevention curing sheet, 1110... messenger wire, 1120... metal wheel (clamp/shackle), 1130... curing sheet support column, 1140... lever block, 1200...・Working scaffolding, 1300 .

Claims (14)

An upward scattering prevention curing system for preventing the scattering of crushed materials above the demolished floor when demolishing a multi-story building,
a working scaffold protruding outside the outer wall of the building to be demolished higher than the outer wall of the building;
a curing sheet support column fixed to the work scaffold so as to protrude higher than the work scaffold;
An upward scattering prevention curing system, comprising: a scattering prevention curing sheet that is moored to the curing sheet support pillar so that the degree of tension is adjustable, and that covers the vertical upper part of the dismantling floor. In the upward scattering prevention curing system according to claim 1,
The upward scattering prevention curing system, wherein the curing sheet support poles are clamped at a plurality of locations with respect to the work scaffold. In the upward scattering prevention curing system according to claim 1 or claim 2,
The upward scattering prevention curing system, wherein the tension wire of the scattering prevention curing sheet is extended downward along the curing sheet support column and the end thereof is fixed to the curing sheet support column. In the upward scattering prevention curing system according to claim 3,
An upward scattering prevention curing system, wherein the tension wire includes a messenger wire. In the upward scattering prevention curing system according to claim 3 or claim 4,
An upward scattering prevention curing system characterized in that the ends of the tension wires are configured so that the tension can be adjusted with a lever block (registered trademark). In the upward scattering prevention curing system according to any one of claims 3 to 5,
During floor dismantling work,
The height of the fixing point of the end of the tension wire to the curing sheet support column is a height corresponding to the wall tie that provides temporary support between the work scaffold and the outer wall of the building to be demolished. Characterized by an upward scattering prevention curing system. In the upward scattering prevention curing system according to any one of claims 3 to 6,
During floor demolition work,
The upward scattering prevention curing system, wherein the height of the fixed portion of the end of the tension wire to the curing sheet support column is lower than the height of the outer wall of the building to be demolished. In the upward scattering prevention curing system according to any one of claims 1 to 7,
The upward scattering prevention curing system, wherein the scattering prevention curing sheet is stretched continuously and integrally from above the building to be demolished over the upper side surface of the outer wall. In the upward scattering prevention curing system according to any one of claims 1 to 8,
When the working scaffolding is gradually removed from above in response to the progress of demolition from upper floors to lower floors, the scattering prevention is achieved by moving the curing sheet support columns downward along the working scaffolding. An upward scattering prevention curing system characterized in that the height of the curing sheet is set to a height at which heavy machinery can perform dismantling work on the next demolition floor. In the upward scattering prevention method using the upward scattering prevention curing system according to any one of claims 1 to 9,
a step of dismantling the demolished floor with a heavy machine in a state in which the scattering prevention curing sheet is stretched upward;
a first step of demolishing the outer wall on the first side of the building to be demolished to reduce its height;
a second step of lowering the lowered working scaffold on the outer wall side of the first side to lower the height;
a third step of demolishing the outer wall of the building to be demolished on the second side facing the first side to reduce the height thereof;
a fourth step of lowering the lowered working scaffold on the outer wall side of the second side to lower the height;
and a fifth step of lowering the height of the curing sheet support columns fixed to the lowered first-side work scaffold and the second-side work scaffold. In the upward scattering prevention method according to claim 10,
separating the demolition floor into at least two areas,
A method for preventing upward scattering, wherein the first to fifth steps are performed for each region each time a portion of the demolished floor corresponding to each region is demolished. In the upward scattering prevention method according to claim 10 or claim 11,
A method for preventing upward scattering, wherein the outer wall remains protruding from the remaining uppermost floor by an amount corresponding to two floors at the start of the first step or the third step. In the upward scattering prevention method according to any one of claims 10 to 12,
A method for preventing upward scattering, wherein at the time of completion of the second step and the fourth step, each of the lowered working scaffolds has a self-supporting scaffold portion of two steps or less. In the upward scattering prevention method according to any one of claims 10 to 13,
The upward scattering prevention method, further comprising a step of temporarily loosening the tension of the scattering prevention curing sheet before performing the fifth step.