JP2019206860A - Demolition method of underground structure - Google Patents

Abstract

To provide a demolition method of an underground structure in which a boring work by an auger machine is possible even though filled earth and a banking are filled on demolished concrete crushed pieces, in a situation that boring is carried out to install an H-shaped steel and a pile at reconstruction in a case where an underground skeleton is demolished and a ground is constructed.SOLUTION: In a demolition method of an underground structure in which an underground skeleton 1 is gradually demolished from a bottom layer at a height at which an adjacent area does not collapse, in which filled earth 5 is filled into a gradually formed demolition space to form a temporary base 6 supporting a remaining skeleton and in which a vacant lot is constructed by banking in a bottom region and laminating raised ground to a top layer, a boring region 3 to be bored at reconstruction is formed by laminating filled earth from which crushed pieces generated in demolition are removed, from the bottom layer to the top layer.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a demolition method for underground structures.

  Conventionally, concrete structures are dismantled after the ground floor is dismantled, and the workers manually dismantle and dismantle them in the underground enclosure, or carry heavy machinery into the underground enclosure and perform the dismantling work. The piece is usually used as a landfill because it takes time to carry out and process. However, when a building is replaced on the ground following dismantling, drilling work with an auger machine at the standing position of H steel, piles, etc., will result in an auger machine if concrete fragments are contained in the embedded soil. There is a problem that the drilling operation cannot be performed.

JP 2003-64712 A

  An object of the present invention is to provide an underground structure dismantling method that eliminates the above-described problems and enables drilling work by an auger machine.

  In the present invention, the underground structure is dismantled step by step at a height at which the adjacent land does not collapse from the lowermost layer, and a temporary base that supports the remaining frame is formed by filling the dismantled void formed stepwise with the embedded earth. At the same time, in the demolition method of underground structure, which is embankment in the bottom area and builds up the ground by laminating the raised ground to the top layer, the drilling area drilled at the time of rebuilding is the concrete fragment generated at the time of dismantling from the bottom layer to the top layer It is formed by laminating with embedded earth except for.

The effect | action by the said problem-solving means is as follows. In other words, drilling work with an auger machine is possible by making a drilling area where the embedded soil is laminated up to the top layer by removing concrete fragments at the drilled site. Drilling work to the standing position such as piles becomes possible.

  As described above, the demolition method of the underground structure of the present invention forms a drilling region by laminating embedded soil excluding concrete fragments at the site to be drilled, so that a drilling operation by an auger machine is possible. It is not necessary to use an expensive excavator that can excavate even if there is a piece of concrete, and it is possible to suppress running strikes. In addition, it is not necessary to remove the piece of concrete in non-drilled parts, and the piece of concrete can be used. Therefore, the cost of carrying out and discarding the concrete crushed pieces is not necessary, and the amount of the embedded earth to be input from the outside can be reduced, so that the cost of dismantling can be reduced.

It is a perspective view which shows the state which disassembled the ground part. It is a perspective view which shows the state which disassembled the soil similarly. It is a perspective view which shows the state which crushed the lowest layer of the underground frame similarly. It is sectional drawing which shows the state which similarly crushed the lowest layer of the underground frame. Similarly, it is a cross-sectional view showing a perforated region in which a concrete fragment C in a perforated portion of a crushing part B of an underground skeleton is removed and filled with embedded earth. It is sectional drawing which shows the state which fractured | ruptured the lowermost right side of the underground skeleton similarly. Cross-sectional view showing a state in which a ground is formed by filling the concrete fragment C remaining in the non-perforated portion of the right crushing part B with embedding earth and embedding it on the concrete fragment C to the dismantling height. It is. It is a perspective view similarly. It is sectional drawing which shows the crushing part B similarly formed in the lower layer of the underground frame. FIG. 5 is a cross-sectional view showing a perforated region in which a concrete fragment C at a perforated portion of the crushing portion B is removed and filled with embedded earth. It is sectional drawing which shows the state which similarly formed the crushing part B in the lower layer of the underground frame. FIG. 5 is a cross-sectional view showing a state in which the soil is filled on the concrete crushing piece C remaining in the non-perforated portion of the crushing part B, and is also embanked on the concrete crushing piece C to a dismantling height to form a raised ground. It is sectional drawing which shows the state which repeated the same operation | work and formed the piercing area | region in the piercing | drilling site | part to the uppermost stage, formed the raising ground to the uppermost stage, and constructed the ground. It is a perspective view which similarly shows the drilling area | region formed in the further ground.

Embodiments of the present invention will be described with reference to FIGS.
As shown in FIG. 1, after crushing and dismantling the ground floor of a concrete building, the heavy machinery S is lowered to the remaining underground skeleton 1 and the soil 2 is crushed as shown in FIG. Subsequently, as shown in FIGS. 3 and 4, the lowermost layer of the underground frame 1 is crushed with a heavy machine S at a height at which the adjacent land does not collapse to form a crushed portion B. In addition, it is natural that the earth 2 and the underground frame 1 may be crushed manually without using the heavy machinery S.

  As shown in Fig. 5, the drilling site where the piles and H steel are erected at the time of rebuilding construction requires drilling work with an auger machine, so the concrete fragments C scattered in the crushing part B are removed. A buried region 5 is filled to receive the load of the underground skeleton 1 and to form a drilling region 3 that can be drilled by an auger machine. In addition, a drilling area 3 that can be drilled by an auger machine by removing embedded concrete 5 to the dismantling height after removing the concrete fragment C at the site where a pile for providing an independent pillar in the underground structure is provided. Form.

  Next, the non-perforated part of the crushing part B is filled with the embedded earth 5 on the remaining concrete fragment C to form a non-perforated region 4 to support the underground frame 1. Next, as shown in FIG. 6, the lowermost layer on the right side of the underground enclosure 1 is crushed to form a crushed portion B.

As shown in FIGS. 7 and 8, the lowermost layer crushing portion B on the right side is a non-perforated portion, and therefore, a non-perforated region 4 to be a temporary base 6 filled with embedded earth 5 is formed on the concrete crushed piece C. Supports underground structure 1. Next, after surplus concrete crushed pieces C are dispersed in the non-perforated portion in the bottom region of the underground structure, the embankment 7 is formed on the concrete crushed pieces C to form a raised ground 8 having a dismantling height.

Next, as shown in FIG. 9, the lower layer of the underground frame 1 is crushed to form a crushed portion B. As shown in FIG. 10, the crushing part B, that is, the perforated part where H steel and piles are erected, forms a perforated region 3 filled with the embedded earth 5 by removing the concrete fragment C and supports the underground frame 1. Thus, a drilling region 3 that can be drilled by an auger machine is used.

  As shown in FIG. 11, the right lower layer of the underground frame 1 is crushed to form a crushed portion B, and as shown in FIG. 12, the concrete crushed pieces C scattered in the right crushed portion B. A temporary base 6 is formed as a non-perforated portion for supporting the underground skeleton 1 by filling the embedded earth 5 thereon. Next, after surplus concrete crushed pieces C are dispersed in the non-perforated portion of the bottom region of the underground structure, the embankment 7 is put on the concrete crushed pieces C to form a raised ground 8 having a dismantling height.

  As shown in FIGS. 13 and 14, the same work process is repeated thereafter, and the perforated region 3 is erected up to the uppermost layer only with the embedded earth 5, and the unperforated region 4 of the crushing part B is erected. Fills the embedded soil 3 put on the concrete crushing piece C, and fills the bottom region with the embankment 7 on the concrete crushing piece C to form a raised ground 8 to form a further ground.

DESCRIPTION OF SYMBOLS 1 Underground frame 2 Soil gap 3 Drilling area 4 Non-drilling area 5 Embedded soil 6 Temporary base 7 Filling 8 Raised ground
S heavy machinery
B Crushing part
C Concrete fragment

Claims (1)

The underground structure is dismantled step by step from the lowest level at a height that does not cause the adjacent land to collapse. In the demolition method of the underground structure that builds up the ground by laminating and stacking the raised ground to the top layer, the drilling area drilled at the time of reconstruction is embedded from the bottom layer to the top layer excluding the concrete fragments generated at the time of demolition An underground structure dismantling method characterized by stacking with earth.

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