JPH094239A - Method of demolishing-removal of reinforced concrete structure - Google Patents

Abstract

PURPOSE: To facilitate draw-out of a cut block body. CONSTITUTION: A lower horizontal cutting-plane line is formed first, and a slide guide 40 is installed before an upper horizontal cuting-plane line is formed. In the guide 40, one end sides are inserted into hole sections 261 , 262 respectively while the other end sides are extended up to the edges of a receiving frame 32 respectively. The guide 40 has a guide rail 40a, a sliding shoe 40b and spacers 40c. The rail 40a has length from edges on the outsides of the hole sections 261 , 262 to the edge of the receicing frame 32. The sliding shoe 40b and the spacers 40c composed of a thin metal plate bent in a recessed shape have approximately the same length as the hole sections 261 , 262 . The shoe 40b is mounted on the rail 40a in the hole sections 261 , 262 . The spacers 40c push the shoe against inwall surfaces on the upper sides of the hole sections 261 , 262 , and insert the shoe to the lower side of the rail 40a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for improving a dismantling and removing method for a reinforced concrete structure.

[0002]

2. Description of the Related Art As a method for dismantling and removing a reinforced concrete structure, the use of a wire saw method has recently attracted attention. The wire saw method of this kind is a method of cutting a reinforced concrete structure or a stone material using a wire saw in which beads having electrodeposited or sintered granular diamond are attached to a wire, and for example, Japanese Patent Publication No. 1-5342.
It is disclosed in Japanese Patent Publication No. 6 and Japanese Patent Publication No. 1-53427, and has the advantage that high efficiency cutting is possible and there is little influence on the surrounding environment. However, this type of construction method has technical problems described below.

[0003]

That is, in the wire saw method described above, for example, when dismantling and removing a wall-shaped concrete structure, the concrete structure is cut vertically and horizontally to be disassembled into blocks. The removed blocks will be removed from the construction site in sequence. However,
In such a dismantling removal method, the cutting of a concrete structure by the wire saw method can be performed with a large cross-sectional area, and considering the cutting efficiency, the weight of the block body becomes very large, resulting in the division. There was a problem that it became very difficult to pull out the disassembled block and remove it.

The present invention has been made in view of such conventional problems, and an object of the present invention is to dismantle and remove a reinforced concrete structure capable of easily removing a block that has been disassembled and divided. To provide a construction method.

[0005]

In order to achieve the above object, the present invention is a method for dismantling and removing a reinforced concrete structure in which a reinforced concrete structure is cut and disassembled into blocks, and the disassembled blocks are removed. A pair of holes are formed at predetermined intervals on the cutting line to which the load of the block body is applied, and one end side is inserted into each of the hole parts, and the other end side is up to the cradle side for carrying out. It is characterized by installing a pair of extended slide guides. The slide guide may include a guide rail, a sliding shoe installed on the upper side of the guide rail, and a spacer that presses the sliding shoe toward the upper inner wall surface of the hole. A fluid lubricant such as grease mixed with molybdenum disulfide can be filled between the slide guide and the inner wall surface of the hole.

[0006]

According to the method for dismantling and removing a reinforced concrete structure having the above structure, a pair of holes are formed at predetermined intervals on the cutting line to which the load of the block is applied when the structure is dismantled, and one end side is a hole. Since a pair of slide guides are installed, each of which is inserted into the part and the other end of which extends to the cradle side for unloading, move the divided disassembled block body along the slide guide and pull it out to the cradle side. be able to. According to the configuration of claim 2, the slide guide includes the guide rail, the sliding shoe installed on the upper side of the guide rail, and the spacer that presses the sliding shoe toward the upper inner wall surface of the hole. Therefore, when the block body is pulled out, the sliding shoe slides on the guide rail, and the frictional resistance of the sliding movement is reduced. According to the third aspect of the invention, since a fluid lubricant such as grease mixed with molybdenum disulfide is filled between the slide guide and the inner wall surface of the hole, when the sliding shoe slides on the guide rail. The frictional resistance of is further reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 6 show an embodiment of a method for dismantling and removing a reinforced concrete structure according to the present invention. The dismantling removal method shown in the figure illustrates a case where the present invention is applied to a case where a substantially circular opening 12 is formed through a wall-shaped concrete structure 10.

In the embodiment shown in the figure, the dismantling and removing method is
The process is roughly composed of a hole forming process, a block cutting process, and a separated block removing and carrying out process. Further, in the embodiment shown in the figure, a roughly circular opening 12 is formed by cutting and removing the block bodies 14 _{1 to} 14 ₆ divided into six parts. Regarding the cross-sectional shape of the block bodies 14 _{1 to} 14 ₆ , the pair of members located above and below the center of the opening 12 are substantially square, and the other portions are substantially triangular. [Drilling Step of Hole Portions] A pair of hanging holes 16 ₁ for mounting hanging metal fittings are provided at substantially central positions of the block bodies 14 _{1 to} 14 _6.
~ 16 ₆ are formed through. Also, each block body 14 ₁
-14 ₆ dismantling is performed by cutting the wire saw method to be described later. In the center of the opening 12,
The pair of block bodies 14 _{1 and} 14 ₄ located above and below are composed of a pair of vertical cutting lines 18 ₁ to 18 ₄ and three horizontal cutting lines 20.
It is disassembled by _{1 to} 20 ₃ .

[0009] Block ₁₄ 1, 14 ₄ of the left and right sides positioned on the block body 14 _2, 14 _3, 14 _5, 14 _6, a horizontal cut line 20 _4, 20 _5, oblique cutting lines 22 ₁ to 22 ₈ Dismantled by and. These vertical and horizontal cutting lines 18 ₁ ~
Wire through holes 24 _{1 to} 24 ₁₂ are pre-drilled at the respective ends of 18 _4, 20 _{1 to} 20 ₅ and the diagonal cutting lines 22 _{1 to} 22 ₈ .

In the block bodies 14 _{1 to} 14 ₆ disassembled by such a cutting line, a predetermined interval is provided on the cutting line to which the load of each block body 14 _{1 to} 14 ₆ is applied when disassembled. As a result, a pair of insertion hole portions 26 _{1 to} 26 _{6 of the} slide guide 24 are formed. That is,
In block 14 _1, the hole portion 26 ₁ a pair of upper horizontal cut line 20 ₂ is provided so as to extend in the same direction as the horizontal cut plane, the block body 14 _2, a pair of holes on the horizontal cut line 20 ₄ The portion 26 ₂ is similarly provided, and the block body 14 ₃ is similarly provided with the pair of holes 26 ₃ on the horizontal cutting line 20 ₅ .

In the block body 14 ₄ , a pair of holes 26 ₄ are similarly provided on the horizontal cutting line 20 ₃ , and in the block body 14 ₅ , a pair of holes 26 ₄ are formed on the diagonal cutting line 22 _6.
5 is similarly provided, and the block body 14 ₆ is similarly provided with the pair of hole portions 26 ₆ on the oblique cutting line 22 ₈ . Each hole 26 _{1-26 6,} each corresponding block 14 ₁ to 1
4 ₆ in consideration of the center of gravity of, are provided in pairs at intervals of equal on the left and right about the vertical line sent down from the center of gravity.

Each suspension hole 16 _{1 to} 16 ₆ and through hole 24 ₁ to
24 _12, the hole 26 _{1-26 6,} for example, as shown in FIG. 1, using a mobile scaffold 28, concrete construct 1
The core boring machine 30 is installed and drilled on the wall surface of No. 0. The hanging holes 16 _{1 to} 16 ₆ and the through hole 24 as described above.
_{When the} work of boring ₁ to 24 _{12, the} holes 26 _{1 to} 26 ₆ is completed, the work of cutting the block body 14 ₁ is performed. In addition,
It is not necessary to preliminarily perform such a hole-drilling step as in the present embodiment, and may be appropriately bored as necessary. [Block Cutting Step] In FIG.
Use vertical cutting line 18 ₁ of the block body 14 _1, 1
The construction status when forming 8 ₃ is shown. In the cutting and dismantling work shown in the figure, the receiving stand 32 is installed on the side of the concrete structure 10, and the wire saw driving device 34 is installed further on the side of this stand 32. The wire saw driving device 34 includes a drive pulley 34a that travels the wire saw 31, a carriage 34b that rotatably supports the drive pulley 34a, a rail 34c that slidably supports the carriage 34b, and a carriage 34.
It has a weight 34d for pulling b along the rail 34c.

The wire saw 31 is connected to the drive pulley 34a.
Install a plurality of guide pulleys 36 between the building 10 and
Through hole from the drive pulley 34a through the guide pulley 36
24 ₁, 24₁₁Between (through hole 24_2,24₁₂Between)
And is wound endlessly. In this state, drive pool
When the wire 34a is driven, the wire saw 31 moves to the weight 34d.
Circulates at a predetermined speed while applying more tension,
There is friction between the ear saw 31 and the concrete structure 10.
Occurs, and due to this friction, the through hole 24₁, 24₁₁Interval (through
Hole 24_2,24₁₂18) vertical cutting line 18
₁(18_Three) Is formed.

For cutting the wire saw 31 by friction.
In this case, water is always supplied. Vertical in this way
Cutting line 18₁, 18_ThreeIs formed, then shown in FIG.
The horizontal cutting line 20_1,20₂Wire saw 3
It is formed by 1. This horizontal cutting line 20_1,20₂Shape
When forming, the wall of the concrete structure 10
How to change the traveling direction of Yasoh 31 from vertical to horizontal
The direction change pulley 38 is installed and the through hole 24₁, 24₂while
(Through hole 24_11,24₁₂Space) and wound endlessly
By circulating the runnable wire saw 31,
Horizontal cutting line 20 between holes_1,20₂Is formed. [Step of removing and carrying out separated block body] At this time,
In this embodiment, first, the lower horizontal cutting line 20₂Shaped first
Made, horizontal cutting line 20 above₁Before forming the
The slide guide 40 is installed as shown in FIG.
The slide guide 40 of this embodiment has a hole on one end side.
26 _1,26₂Inserted inside, and the other end side
Are extended to the edge of the pedestal 32.

The slide guide 40 of this embodiment comprises a guide rail 40a made of I-shaped steel, a sliding shoe 40b, and a spacer 40c.
The guide rail 40a has a length that extends from the outer edge of the holes 26 _{1 and} 26 _{2 to} the edge of the pedestal 32. Sliding shoe 40b constituted by a thin metal plate which is bent in a concave shape has substantially the same length as the hole portion 26 _1, 26 _2, is installed in the hole 26 _1, 26 in the _second guide rails 40a on .

The spacer 40c has a hole 26_1,26₂Toho
The sliding shoe 42 has the same length and the hole 2
6_1,26₂The inner wall surface of the upper part of the hole
26 _1,26₂Inserted below the inner guide rail 40a
You. At this time, each hole 26_1,26₂Molybdenum disulfide in
Filling with fluid lubricant 40d such as grease mixed with den
It is desirable to fill such a fluid lubricant 40d.
When filled, each disassembled block 14₁~ 14₆The side
When pulling out to one side, the frictional resistance decreases and pulling out work
Will be even easier.

When the installation of the slide guide 40 is completed as described above, the upper horizontal cutting line 20 ₁ is formed. In the process of forming the cutting line 20 ₁ , since the lower horizontal cutting line 20 ₂ has already been formed, the separated block body 14 ₁ suddenly moves downward due to the weight of the block body 14 ₁ during cutting. Although there is a risk of falling, in the present embodiment, the slide guide 4 is inserted in each of the holes 26 _{1 and} 26 ₂ .
Since 0 is inserted, it is possible to cut in a stable state without such a problem.

In this case, the upper horizontal cutting line 20 ₁ can be formed first and the lower horizontal cutting line 20 ₂ can be formed later. However, if the cutting process is adopted in this way, the lower horizontal cutting line 20 ₁ can be formed. While the line 20 ₂ is being formed, the wire saw 31 may be unable to run due to the weight of the separated block body 14 ₁ . Therefore, conventionally, in order to solve this problem, by implanting wedges in the horizontal cut line 20 ₂ formed was to prevent the width of the horizontal cut line 20 ₂ is narrowed. However, in this embodiment, each hole 26 _1, 2
Since the slide guide 40 is inserted into 6 ₂ , the width of the horizontal cutting line 20 ₂ can be secured without hammering in the wedge.

When the upper horizontal cutting line 20 ₁ is formed first and the lower horizontal cutting line 20 ₂ is formed later,
The wire saw 31 is inserted between the through hole 24 ₁₁ and the left hole portion 26 ₁ , between the hole portions 26 _{1, and} between the right hole portion 26 ₁ and the through hole 24 ₁₂ , respectively, and the wire saw 31 is horizontally divided into three parts. Cutting line 20
₂ should be formed. When inserting the wire saw 31 into the hole 26 ₁ , the space formed on both sides of the guide rail 40a may be used.

As described above, the pair of horizontal cutting lines 20
_1, 20 ₂ are between through holes 24 ₁ and 24 ₂ and through holes 24 _11, 2
4 ₁₂ When each of which is formed and between, the block body 14 ₁ is separated, pull the block body 14 ₁ laterally received is placed on the cradle 32. At this time, the holes 26 _1, 26
_The sliding shoe 40c installed on the guide rail 40a is pressed against the wall surface on the upper side by the spacer 40d and is filled with the fluid lubricant, as shown in FIG.
Pulling Use drawer equipment such as lever blocks and winches laterally slidingly sliding shoe 40b guide rails 40a on due to the weight of the block body 14 _1, the friction is very small, easy to withdraw it You can

The block body 14 _{1 that} has been pulled out is then carried out by inserting a suspension wire 42 into the suspension hole 16 ₁ and lifting it with a crane or the like. In this case, the wheels may be attached to the receiving stand 32, and the block body 14 ₁ may be carried out by moving the receiving stand 32. When the cradle 32 is moved and carried out, the hanging holes 16 _{1 to} 16 ₆ can be used for preventing falling by inserting wires.

When the unloading of the block body 14 ₁ is completed, the diagonal cutting line 22 ₁ is inserted between the through holes 24 ₁ and 24 ₁₀ and the through hole 24.
_{10 and} 24 ₉ and a horizontal cutting line 24 ₉ is formed between the through holes 24 _{9 and} 24 ₁₁ to form the block body 14
_The block body 14 ₂ is separated and removed by the same procedure as in ₁ . At the time of removing the block body 14 _{4-14 6} the lower side, the height of the receiving frame 32 is adjusted to correspond to the position.

After that, such a procedure is sequentially repeated.
By returning, each block body 14 _Three~ 14₆Disconnection
All the block bodies 14 are separated and carried out.₁~ 1
4₆Upon completion of dismantling and removal of the concrete structure 10
A substantially circular opening 12 is formed at a predetermined position of Sa
And reinforced concrete structure 1 configured as above
Blocked by dismantling and removal method of 0, when dismantled
Body 14₁~ 14₆Cutting line, for example, horizontal
Cutting line 20₂The cutting line 20 is spaced above the cutting line 20.
₂A pair of holes 26 in a direction orthogonal to₁Piercing, one end side
Hole 26₁The other end is used for carrying out
A pair of slides that extend to the cradle 32 side
Since the guide 40 is installed, the block body is divided and disassembled.
14₁~ 14₆Move along the slide guide 40
And can be pulled out to the cradle 32 side.

Therefore, the efficiency of dismantling and removing the reinforced concrete structure 10 is greatly improved. In addition, in the said Example, although the case where the substantially circular opening 12 was formed in the wall-shaped reinforced concrete structure 10 was illustrated, implementation of this invention is.
The present invention is not limited to this example, and may be applied to the case where vertical and horizontal cutting lines are formed in the wall-shaped reinforced concrete structure 10 and the wall-shaped reinforced concrete structure 10 is divided and dismantled and removed. You can

The method of cutting and separating the blocks 14 _{1 to} 14 ₆ is not limited to the wire saw method described above. For example, as described above, the wall-shaped reinforced concrete structure 10 is divided into a lattice shape. In the case of dismantling and removing the block body by the wall saw method of cutting the concrete structure using a disk-shaped blade, the block body 14 ₁ ~
14 ₆ may be cut.

[0026]

As described above in detail in the embodiments,
According to the method for dismantling and removing a reinforced concrete structure according to the present invention, it is possible to easily pull out a block structure, so that it is possible to significantly improve the construction efficiency of the dismantling and removing method.

[Brief description of drawings]

FIG. 1 is a side view showing a hole forming step in a method for dismantling and removing a reinforced concrete structure according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view showing a vertical cutting step of a dismantling and removing method for a reinforced concrete structure according to the present invention.

FIG. 4 is a side view showing a horizontal cutting step of a method for dismantling and removing a reinforced concrete structure according to the present invention.

FIG. 5 is a side view and a cross-sectional view of a main part showing a slide guide installation step of a method for dismantling and removing a reinforced concrete structure according to the present invention.

[Fig. 6] Fig. 6 is a side view showing a carry-out and removing process of a dismantling and removing method for a reinforced concrete structure according to the present invention.

[Explanation of symbols]

10 Reinforced concrete structure 12 Opening 14 _{1 to} 14 ₆ Block body 16 _{1 to} 16 ₆ Hanging hole 18 ₁ to 18 ₄ Vertical cutting line 201 _{1 to} 20 ₅ Horizontal cutting line 22 _{1 to} 22 ₈ Diagonal cutting line 24 _{1 to} 24 ₁₂ Through hole 26 _{1-26 6} holes 28 moving scaffold 31 wire saw 32 receiving pedestal 34 wire-saw driving device 40 slide guides 40a guide rail 40b sliding shoe 40c spacer

Claims (3)

[Claims] 1. In a method of dismantling and removing a reinforced concrete structure, which comprises cutting a reinforced concrete structure to dismantle it into blocks and removing the dismantled block, a predetermined load is applied on a cutting line to which the load of the block is applied when dismantled. A pair of slide guides are provided with a pair of hole portions spaced apart from each other, one end side of which is inserted into each of the hole portions, and the other end side of which is extended to the carrying-out cradle side, respectively. Method for dismantling and removing reinforced concrete structures. 2. The slide guide includes a guide rail, a sliding shoe installed on the upper side of the guide rail, and a spacer for pressing the sliding shoe toward the upper inner wall surface of the hole. The method for dismantling and removing a reinforced concrete structure according to claim 1. 3. The dismantling of the concrete structure according to claim 2, wherein a fluid lubricant such as grease mixed with molybdenum disulfide is filled between the slide guide and the inner wall surface of the hole. Removal method.