JP5117291B2 - How to dismantle a building - Google Patents

Description

  The present invention relates to a building demolition method for demolishing a building such as a building from a lower layer.

  Conventionally, the dismantling work of a building is generally started from the uppermost part such as a rooftop and finished at the lowermost part such as an underground base part from a low-rise building to a high-rise building. The demolished concrete block, wooden block, iron material, and wood or the like constituting the pillars and floors are dropped to the ground by a crane, a belt conveyor, or the like in a certain amount.

  However, in the conventional method of starting demolition from the upper layer of the building, it is necessary to install a large-scale demolition device on the upper layer part, and this installation work is extremely difficult. Furthermore, it is necessary to sequentially move a large dismantling device from the upper layer portion to the lower layer portion, and a separate device is required for this movement, and the moving work increases the man-hours and the work period.

  In addition, when scrapping the upper layer, fine debris and dust such as concrete, wood, iron, etc. generated by dismantling are scattered widely around the building to be demolished, and the surrounding residents, buildings, standing trees, green spaces There is a problem that not only adversely affects the noise, but also the noise is considerably large.

In order to solve these problems, methods for dismantling a building from a lower floor have been proposed in Japanese Patent Application Laid-Open No. 2-24455 and Japanese Patent Publication No. 7-30637.
Japanese Patent Laid-Open No. 2-24455 Japanese Patent Publication No. 7-30737

  In the method for demolishing a building disclosed in Patent Document 1, the building to be demolished is supported by a truss to prevent the building from falling down. For this reason, in this dismantling method, the strength of the truss itself and the connecting portion that connects the truss to the building are required to be extremely high. As a result, there is a disadvantage that the cost of constructing the truss and fixing it to the building is extremely high.

  The building demolition method disclosed in Patent Document 2 is not necessarily a safe method because it is a demolition method in which the lower layer is demolished by partially supporting it with a jack so that the building does not collapse in the lower layer demolition. Furthermore, there is no clear disclosure about a method for dismantling a column containing steel frames or reinforcing bars, and there is a problem in future implementation.

  The present invention has been made in view of these points, and the object of the present invention is to provide a method for demolishing a building that can be demolished safely and reliably as if it is dropped from a lower floor. is there.

  According to the present invention, a building dismantling method for dismantling a building, in which the uncut portion is left in the center so that the strength to withstand vertical load remains, and the outer peripheral portion in the vicinity of the lower layer and the upper layer in the vicinity of the lower layer. A column cutting process in which the outer peripheral portion is cut with a circular cutting blade, and before or after the column cutting process, a jack is inserted between the upper layer and the lower layer supported by the column, jacked up, and a column is temporarily installed with the jack. A temporary column support step, a column removal step that applies a torsional force to the column and destroys the uncut portion remaining in the central portion to remove the column, and the upper layer is brought into contact with the lower layer by reducing the jack There is provided a method for demolishing a building, comprising: a drooping process for reducing the level, and a jack taking-out step for taking out the jack from a gap formed by contact between an upper layer and a lower layer.

  According to the present invention, the outer periphery in the vicinity of the lower layer of the column and the outer periphery in the vicinity of the upper layer are cut with the circular cutting blade so that the strength that can withstand vertical load remains in the center, and the upper layer supported by the column before or after cutting. Insert a jack between the lower layer and the lower layer and jack up to temporarily install a column with a jack, and apply a torsional force to the column by applying a belt etc. to the column to destroy the uncut portion remaining in the center Since the column was removed, the column was temporarily installed with a jack before removing the column, so the upper layer can be supported with sufficient strength, and the building can be demolished from the lower floor with high safety. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Referring to FIG. 1, reference numeral 2 denotes a five-story building as a building. A plurality of pillars 4 are erected on the ground 5, and a floor 6 and a roof 9 are supported by these pillars 4. ing. The pillar 4 is comprised from a steel frame or reinforced concrete. A shield 8 such as a wall or a window is provided between the adjacent columns 4.

The building dismantling method of the present embodiment dismantles the building 2 from the first floor portion of the building 2 as shown in FIG. A column 12 that extends in the vertical direction is erected on the dismantling vehicle 10, and a cutting device 14 is movably mounted along the column 12. The cutting device 14 includes a circular cutting blade 16 that is rotationally driven.

  In the dismantling method of the present invention, the shield 8 around the pillar 4 to be dismantled is removed so that the dismantling vehicle 10 can go around the pillar 4 to be cut. Since the rigidity of the building 2 is maintained by the plurality of pillars 4, the removal of the shield 8 does not affect the stability of the building.

  Next, as shown in FIG. 2, the cutting blade 16 is applied to the outer peripheral portion near the upper layer of the column 4 to cut the column 4. At the time of this cutting, as shown in FIG. 3, the upper layer portion of the column 4 is cut by leaving the uncut portion 18 at the center so that the strength to withstand the vertical load remains.

  The dismantling vehicle 10 is sequentially moved, and the surroundings of the pillar 4 are sequentially cut by the cutting blade 16 as indicated by an arrow A. At this time, the periphery of the pillar 4 is cut so as to leave the uncut portion 18 indicated by hatching (parallel oblique lines) 18.

  Next, the cutting device 14 is turned 180 degrees, the circular cutting blade 16 is positioned downward, and the outer peripheral portion in the vicinity of the lower layer of the pillar 4 is similarly cut. As a result, as shown in FIG. 4, the cutting groove 17 is formed in the outer peripheral portion in the vicinity of the upper layer portion, and the cutting groove 19 is formed in the outer peripheral portion in the vicinity of the lower layer portion. In addition, you may make it cut the lower layer part vicinity of the pillar 4 previously.

  Before or after such a column cutting step, as shown in FIG. 4, a jack 30 is inserted between the upper floor 6 and the lower floor 5 supported by the column 4 and jacked up to be the jack 30. Temporarily install the support.

  In FIG. 4, the dismantling vehicle 20 includes a twisting force applying means 22. The torsional force applying means 22 includes a shaft 24 that is rotationally driven by a motor (not shown), a stopper 26 that is fixed to the tip of the shaft 24, and a pole 4 and the shaft 24. A connected endless belt 28 is included.

  When the shaft 24 is rotated as shown in FIG. 5 in a state where a column composed of the jack 30 is temporarily installed in the vicinity of the column 4 to be broken, the endless belt 28 is rotated as indicated by an arrow B, and the column A twisting force is applied to 4. Thereby, the uncut portion 18 remaining in the center of the pillar 4 can be destroyed and the pillar 4 can be removed.

  The same operation as described above is performed on all the pillars 4 constituting the building 2 to remove all the pillars 4 on the first floor. Next, all the jacks 30 are reduced, the floor 6 of the second floor part is brought into contact with the ground 5 and the number of floors of the building is reduced to the fourth floor.

  This process is called a dharma dropping process because the temporary strut (jack) 30 on the first floor, which is the lower floor, is removed to reduce the number of floors. Next, the jack 30 that has been fully reduced from the gap between the second floor dropped on the ground and the ground is taken out. It is preferable to prepare the jacks 30 as large, medium, and small, remove them sequentially, and finally take out the small jacks 30 from the gap between the upper layer and the lower layer.

  The entire building 2 can be dismantled by sequentially repeating the above-described steps for the second floor portion, the third floor portion, the fourth floor portion, and the fifth floor portion.

It is a figure which shows the whole structure of the building which should be demolished. It is a schematic diagram which shows a column cutting process. It is explanatory drawing which shows a column cutting process. It is a schematic diagram which shows a support | pillar temporary process and a pillar removal process. It is explanatory drawing which shows a column removal process.

Explanation of symbols

2 Building 4 Column 5 Ground 6 Floor 8 Shield 9 Roof 10, 20 Demolition Vehicle 14 Cutting Device 16 Cutting Blade 18 Uncut Portion 22 Torsional Force Applying Means 28 Endless Belt 30 Jack

Claims (1)

A method of demolishing a building that demolishes the building,
A column cutting process in which the outer periphery near the lower layer of the column and the outer periphery near the upper layer are cut with a circular cutting blade by leaving the uncut portion at the center so that the strength that can withstand vertical load remains,
Before or after the column cutting process, a jack is inserted between the upper layer and the lower layer supported by the column, and a column is temporarily installed by jacking up and supporting the column with a jack; and
A column removing step of applying torsional force to the column and destroying the uncut portion remaining in the central portion to remove the column;
A drool dropping step of reducing the jack and reducing the level by bringing the upper layer into contact with the lower layer;
A jack removing step of taking out the jack from a gap formed by contacting the upper layer and the lower layer;
A method for dismantling a building, comprising:

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