JP2012162787A - Demolition method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a demolition method capable of reducing generated noise and vibration, and demolishing a slab safely and efficiently.SOLUTION: The demolition method for demolishing a residual pig iron 10 includes: a dividing line setting step (step s1) for setting dividing lines L for dividing the residual pig iron 10; a drilling step (step s3) for drilling a plurality of dividing holes 20 arranged along the dividing lines L and separated at a predetermined interval S all over the dividing lines L by a hydraulic crawler drill 110 provided with a hydraulic drill device 130 drilling downward and capable of running on the residual pig iron 10; a drilling equipment leaving step (step s4) for leaving the hydraulic crawler drill 110 from the residual pig iron 10 after finishing the drilling step; and a divided block carrying out step (step s7) for carrying out divided blocks 40 made from the residual pig iron 10 divided by the plurality of dividing holes 20 separated at the predetermined interval S along the dividing lines L.

Description

  The present invention relates to a method of dismantling a floor slab such as residue or concrete that has been solidified at the bottom of a blast furnace.

  When dismantling structures such as residues and concrete in the blast furnace, dismantling has been done by using a destructive device by hitting a breaker or aion or destroying the structure by blasting. There is a strong demand for reduction of noise and vibration generated in the building, and using a cutting device such as a wire saw or a wall saw as shown in Patent Document 1, there is a demolition method that divides the structure members into blocks and carries them out. Proposed.

  In this way, it is said that by using a wire saw, a wall saw, or the like, the members of the structure are divided into blocks and carried out, so that it is possible to reduce the noise and vibration generated in the safety and demolition work.

  However, for example, in order to divide using a wire saw, it is necessary to wind a wire around the outer periphery of the member to be cut. For that purpose, a through-hole for passing the wire must be previously drilled in the member to be cut. Rather, multiple setup changes were necessary for cutting.

  In addition, when the strength of the member to be cut is high, there is a problem that it takes time to cut with the wire and wear of the diamond tip provided on the wire becomes severe. As a result, while it is safe and can reduce noise and vibration generated during the demolition work, the construction period required for the demolition work becomes long, and there is a risk that the post-process may be urgently required. Moreover, although the wire of a wire saw is expensive because it has the above-mentioned diamond tip, if the wear becomes severe, the frequency of replacement increases, which may increase the construction cost required for the dismantling work.

JP 2009-13459 A

  In view of the above-described problems, an object of the present invention is to provide a dismantling method capable of reducing generated noise and vibration and dismantling a floor slab safely and efficiently.

  The present invention is a dismantling method for disassembling a floor slab, comprising a dividing line setting step for setting a dividing line for dividing the floor slab, and a perforating means for perforating downward, and capable of traveling on the floor slab A perforation process for perforating a plurality of division holes along the division line at predetermined intervals by the machine, and a perforation for removing the perforator from the floor slab after completion of the perforation. It comprises a machine leaving step and a divided block carrying out step of dividing the floor slab by the dividing line by a plurality of the divided holes spaced by a predetermined interval and carrying out as a divided block.

  The dividing line can be an appropriate line suitable for dividing or carrying out, for example, a lattice shape or a radial shape with respect to the floor slab.

The floor slab may be a residue solidified at the bottom of the blast furnace or a concrete structure such as reinforced concrete.
The drilling machine capable of traveling on the floor slab can be, for example, a construction vehicle having both traveling means such as a hydraulic crawler drill and drilling means.

  The plurality of divided holes spaced by the predetermined interval means that the divided holes are perforated so that a floor slab portion corresponding to the predetermined interval remains between adjacent divided holes. The predetermined interval allows the drilling machine to run on the floor slab even after completion of the drilling process, and does not generate vibration or noise with the hooks of the backhoe bucket after the drilling process. The interval can be easily broken. In addition, after completion of the perforation process for perforating the entire dividing line, it means after completion of perforating all the divided holes to be perforated along a preset division line.

According to the present invention, generated noise and vibration can be reduced, and the floor slab can be disassembled safely and efficiently.
Specifically, a plurality of divided holes are provided along the dividing line set in the dividing line setting step of the previous step, and a plurality of divided holes separated by a predetermined interval by a punching machine that includes a punching means for drilling downward and capable of traveling on the floor slab. , Can drill efficiently.

  More specifically, for example, when fixing to a floor slab at a drilling target location and drilling using a diamond core cutter or the like, it takes a long time to fix or drill the core cutter. If all the divided holes along the dividing line are drilled with a core cutter, the time is enormous. On the other hand, in the present drilling step, a drilling device that drills downward and includes a drilling machine that can run on the floor slab is used. Therefore, the drilling speed is high, and the time for fixing and moving the drilling device can be omitted. , Can drill efficiently.

  Since the divided holes are perforated at a predetermined interval, in addition to the above-described effects, the number of perforations can be reduced as compared to the case of perforating each divided hole, so that the perforation process can be shortened. Further, since the wear of the punching means of the punching machine can be reduced by reducing the number of punches, it is possible to suppress an increase in construction cost in the punching process.

  Further, after the drilling is completed, the drilling machine is moved away from the floor slab, in other words, the drilling machine is moved out after drilling all the divided holes with the drilling machine. Since the plurality of divided holes are drilled so that the floor slab part remains, the drilling machine can run on the floor slab even after the drilling process is completed. That is, even after the plurality of divided holes are drilled, the drilling machine can freely run on the floor slab, so that it can be easily moved for drilling and efficiently drilled by the drilling machine.

  Furthermore, after the drilling machine leaving step, the floor slab can be divided on the dividing line while easily breaking between the divided holes with the claws of the backhoe bucket without generating vibration or noise. Therefore, the floor slab can be blocked safely and efficiently and carried out easily.

In addition, as described above, since all the divided holes are drilled in the drilling process, that is, the splitting process and the unloading process are performed after the drilling process is completed, the use period of the drilling machine can be shortened and the same operation is repeated. For this reason, the number of setup changes can be reduced and the construction efficiency can be improved.
Therefore, it is possible to safely and efficiently, that is, shorten the dismantling process and prevent an increase in construction cost required for the dismantling work.

  As an aspect of the present invention, the dividing line is divided into a circumferential dividing line in the circumferential direction that divides the floor slab in an inward / outward direction from the inner side to the outer side in plan view, and an inward / outward direction that divides the floor slab in the circumferential direction. It can be composed of inner and outer direction division lines.

When the floor slab is circular in plan view, the circumferential circumferential dividing line that divides the floor slab in the inner and outer directions from the inner side toward the outer side in the plan view described above divides the floor slab in the radial direction that is the inner and outer direction. When the floor slab is a polygon in plan view, the floor slab is divided in the inner and outer directions to form a division line having a shape similar to that of the polygon in plan view. On the other hand, the inner / outer direction dividing line that divides the floor slab in the circumferential direction can be a radial dividing line extending from the center of the floor slab.

According to the present invention, the floor slab can be easily divided to form divided blocks, and the divided divided blocks can be easily carried out.
Specifically, since the floor slab is divided in the inner and outer directions by the circumferential division line and divided in the circumferential direction by the inner and outer direction division lines, a divided block having a size and weight that can be easily carried out can be formed.

  In addition, after the divided blocks are formed, by first removing and carrying out some of the divided blocks in the circumferential direction, the divided blocks in the same circumferential direction can be divided more easily and removed and carried out. Therefore, the floor slab can be disassembled more efficiently.

  Further, as an aspect of the present invention, a side wall member removing step for removing a side wall member that is disposed outside the floor slab and surrounds a side of the floor slab is performed after the drilling machine leaving step, the divided block. This can be done before the unloading process.

  The side wall member that is disposed outside the floor slab and surrounds the side of the floor slab includes an iron shell and a refractory side wall that form the outer side of the blast furnace bottom, an outer shell that surrounds the outside of the floor slab, and the like. can do. Furthermore, you may newly install in the side outside of the floor slab before dismantling for floor slab demolition.

  According to the present invention, when a plurality of divided holes spaced at a predetermined interval are drilled in the drilling step, even if the drilling machine runs on the floor slab with the divided holes drilled, the side surrounding member is located on the side of the floor slab. Since it is bound and restrained, the floor slab does not collapse, and the drilling machine can be safely removed from the floor slab in the drilling machine leaving process.

As an aspect of the present invention, the floor slab can be a residue remaining on the bottom refractory of the blast furnace.
In this way, when the floor slab is a residue, the strength is higher than that of a general concrete structure. For example, in the case of dismantling with a wire saw or the like, split dismantling takes time and costs. However, even if the floor slab is a residue, in the above-described dismantling method, it is possible to efficiently puncture the divided holes in the residue with a punching machine to form the divided blocks, and to divide the pieces into pieces.

Further, as an aspect of the present invention, the dividing line can be set so that the weight of the divided block obtained by dividing the residue becomes a weight that can be carried out.
The residue has a higher specific gravity than a normal concrete block or the like, and tends to exceed the load weight loaded on a carry-out vehicle such as a dump truck. However, since the above-described dismantling method can efficiently pierce the divided holes and easily form the divided blocks, it is possible to efficiently configure the divided blocks that can be safely carried out even if the residue has a high specific gravity.

  According to the present invention, it is possible to provide a dismantling method capable of reducing generated noise and vibration and dismantling the floor slab safely and efficiently.

The side view explaining the demolition method of the residue by a hydraulic crawler drill. The top view of a furnace bottom part. The flowchart of a residue demolition construction method. The longitudinal cross-sectional view of the furnace bottom part at the time of a piercing | boring process completion. The top view of the furnace bottom part at the time of completion of a piercing | boring process. The longitudinal cross-sectional view of the furnace bottom part at the time of completion of carrying out of an outer periphery division block. The top view of the furnace bottom part at the time of completion of carrying out of an outer periphery division | segmentation block.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view for explaining a method of dismantling the residue 10 by the hydraulic crawler drill 110, and FIG. 2 is a plan view of the furnace bottom 2. In addition, the dividing line L (Lc, Lr) represented by the alternate long and short dash line in the residue 10 in FIG. 2 is a line set in a dividing line setting step described later.

  3 shows a flowchart of the demolition method of the residue, FIG. 4 shows a longitudinal sectional view of the furnace bottom 2 at the completion of the drilling process, and FIG. 5 shows a plan view of the furnace bottom 2 at the completion of the drilling process. Yes. In addition, about the enlarged view about the a part in FIG. 5, the residue 10 other than the division | segmentation hole 20, ie, the residue 10 which was not pierced by the drilling process, is shown by hatching.

  FIG. 6 is a longitudinal sectional view of the furnace bottom portion 2 when the outer peripheral divided block 40a is completely unloaded, and FIG. 7 is a plan view of the furnace bottom portion 2 when the outer peripheral divided block 40a is unloaded.

The dismantling method described in the present embodiment is a method of dismantling the residue 10 solidified on the refractory bottom surface 33 of the bottom 2 of the blast furnace 1 safely and efficiently without generating vibration and noise.
The furnace bottom 2 shown in FIG. 1 is the bottom of the blast furnace 1 to be dismantled, and includes an iron shell 31 covering the outermost peripheral side, a cylindrical fireproof side wall 32 formed with a predetermined thickness inside the iron shell 31, and a fireproof The side wall 32 is formed of a fireproof bottom surface 33 having a circumferential shape having a thickness in a predetermined height direction, and is formed in a concave shape in cross section.

  The iron shell 31 and the refractory side wall 32 are configured by stacking refractory bricks and fixing them. Moreover, in FIG. 1, the upper iron shell 31 and the fireproof side wall 32 have already been removed.

The residue 10 solidified in the region surrounded by the refractory side wall 32 and the refractory bottom surface 33, so-called salamanda, is a solid that has been cooled and solidified in a high-temperature molten state, has a high specific gravity, and is a concrete structure. It has significantly higher strength than
Further, the residue 10 obtained by cooling and solidifying the mineral that has been in a high-temperature molten state contains impurities accumulated over time, and is generally difficult to melt.

  In order to dismantle such residue 10 safely and efficiently without generating vibrations and noises, a hydraulic crawler drill system 100 is used in this dismantling method. The hydraulic crawler drill system 100 includes an operation panel 101 operated by a worker M and a hydraulic crawler drill 110, and is driven by the operation of the operation panel 101 by the worker M.

  The hydraulic crawler drill 110 includes a main body 111, a crawler 120 disposed below the main body 111, and a hydraulic drill device 130 disposed in front of the main body 111.

  The hydraulic drill device 130 can be moved in and out downward while rotating from a lower end of the drill driving unit 132 with a drill driving unit 132 that is attached to the main body 111 by a arm 133 so as to be adjustable at a desired angle. It consists of a drill 131.

  The drill 131 is formed with a carbide tip (not shown) having a cross shape in plan view at the tip and an appropriate diameter. The diameter of the drill 131 is determined according to the strength of the object to be drilled, but in this embodiment in which the residue 10 in which the mineral that has been in a high-temperature molten state is cooled and solidified is drilled, the diameter is set to 100 mm.

  Since the hydraulic crawler drill system 100 is configured as described above, the hydraulic crawler drill 110 can freely travel on the residue 10 by the rotation driving of the crawler 120. Then, it travels to a desired position, and the position and drilling direction of the drill 131 can be easily adjusted by the arm 133 with respect to the drilling position.

  Further, the drill 131 adjusted to the drilling position is rotated by the drill driving unit 132, and the residue 10 can be easily drilled to form the divided holes 20 by taking in and out.

  For example, as described above, the conventional drilling method in the case of drilling the remnant 10 having a significantly higher strength than a concrete structure or the like uses a drill anchor using a diamond core cutter or the like as described above. Begin by fixing with etc. When drilling with the fixed drilling device, the residue 10 is drilled with a rotating diamond core cutter using the fixing force of the cut anchor that fixes the drilling device as a reaction force. However, in order to drill the residue 10 having high strength, the time required for drilling is long because the drilling is performed little by little. Further, when the fixing force of the cut anchor is low, there is a possibility that the fixing of the punching device is released due to the reaction force for punching the residue 10. As described above, in the case of drilling by a drilling apparatus that requires a long time and a lot of labor for drilling, if the number of the divided holes 20 is large, the time and labor are enormous, and the construction cost also increases.

  On the other hand, when the residue 10 is drilled with the hydraulic crawler drill 110 of the hydraulic crawler drill system 100, the hydraulic crawler drill 110 is heavy, so that it is not necessary to separately fix the drill 131 to the drilling position. Moreover, since the hydraulic crawler drill 110 is heavy and the drill 133 can be adjusted to an appropriate position and direction by the arm 133, the residue 10 is efficiently drilled by the drill 131 using the hydraulic crawler drill 110 as a reaction force. Dividing holes 20 can be formed.

Next, the construction sequence of the demolition method for the residue 10 using the hydraulic crawler drill system 100 will be described in detail together with the flowchart shown in FIG.
First, prior to dismantling the residue 10, as shown in FIG. 1, the iron shell 31 and the fireproof side wall 32 above the furnace bottom 2 are removed.

Then, as shown in FIG. 2, a dividing line L (Lc, Lr) is set for the residue 10 that is in a dismantleable state (step s1).
Specifically, when setting the dividing line L, the thickness, specific gravity, and strength of the residue 10 are obtained, and the volume of the residue 10 that can be carried out is calculated. Then, a division line L that can constitute the division block 40 (FIG. 2) corresponding to the calculated volume is set. At this time, according to the strength of the residue 10, the predetermined interval S between the divided holes 20 drilled along the divided line L is calculated and taken into consideration, and the divided lines L are set so that the number of the divided holes 20 is reduced. To do.

  The predetermined interval S is based on the strength of the residue 10, and the hydraulic crawler drill 110 can travel on the residue 10 having the plurality of divided holes 20 drilled. The interval is set such that the divided blocks 40 can be easily formed by dividing with a nail or the like without generating vibration or noise. In the present embodiment, as shown in FIG. 2, the circumferential dividing line Lc, which is three concentric circles having different diameters, and the center C and the inner circumferential dividing line Lc or the circumferential dividing line Lc are connected. A plurality of radial directions Lr are set.

  After the dividing line L is set in the dividing line setting step (step s1), the hydraulic crawler drill system 100 that is a drilling machine is set on the residue 10 (step s2).

Then, the crawler 120 travels on the residue 10, the arm 133 adjusts the drill 131 to the drilling position on the dividing line L, and the drill driving unit 132 is driven to drill the residue 10 with the drill 131. Hole 20 is formed (step s3). At this time, an unperforated connecting portion 21 having a predetermined interval S is formed between the divided holes 20. This is repeated, and all the drilling positions on the set dividing line L are drilled to form the divided holes 20.
In addition, it is preferable that the drilling order in this drilling step (step s3) is an order in which traveling by the crawler 120 and position adjustment and direction adjustment by the arm 133 are minimized.

  As shown in FIGS. 4 and 5, after the drilling of the divided holes 20 in the drilling step (step s3) is completed, the hydraulic crawler drill system 100 as a drilling machine is moved away from the residue 10 (step s4), and thereafter Then, the iron shell 31 and the fireproof side wall 32 surrounding the side of the residue 10 are removed along the removal line T shown in FIG. 4 (step s5). As a result, the side of the residue 10 in which the divided holes 20 are formed is exposed, and the restraint of the residue 10 by the iron skin 31 and the fireproof side wall 32 is released.

  In this state, the unperforated connecting portion 21 between the divided holes 20 is broken without generating vibration and noise by the hooks of the backhoe bucket, and the residue 10 is divided by the divided holes 20 to form the divided block 40. After forming (step s6), the divided block 40 is removed and carried out (step s7).

  The divided block dividing step (step s6) and the divided block unloading step (step s7) may be alternately repeated to divide and remove all the divided blocks 40. In this embodiment, FIG. 6 and FIG. As shown in FIG. 7, one of the outermost divided blocks 40 is first divided into one outer divided block 40a, removed and removed, and then the outer divided block 40a adjacent to the removed outer divided block 40a is divided, Remove and carry out. By repeating this, first, the outermost peripheral divided block 40a is all removed and carried out, and then the radially inner divided block 40 is sequentially divided and removed and carried out.

  In this way, by dividing and removing the divided blocks 40 in the same circumferential direction one by one, a space for the removed divided blocks 40 is formed, so that the adjacent divided blocks 40 can be easily divided and removed. can do.

  Thus, the division | segmentation of the residue 10 is completed by performing the division | segmentation block parting process (step s6) and the division | segmentation block carrying-out process (step s7), and removing all the division | segmentation blocks 40. In addition, the refractory bottom surface 33 on the lower side of the residue 10 is configured by stacking and fixing refractory bricks as described above, and can be easily disassembled after many years of use.

  As described above, the demolition method for dismantling the residue 10 includes the division line setting step (step s1) for setting the division line L for dividing the residue 10, and the hydraulic drill device 130 for drilling downward, A drilling step (step s3) for drilling a plurality of divided holes 20 along the dividing line L and at a predetermined interval S along the dividing line L by a hydraulic crawler drill 110 capable of traveling on After completion of the drilling process, the drilling machine leaving step (step s4) in which the hydraulic crawler drill 110 is withdrawn from the residue 10 and the plurality of dividing holes 20 spaced by a predetermined interval S are used to divide the residue 10 by the dividing line L. By constituting the divided block carrying-out process (step s7) carried out as the block 40, the generated noise and vibration can be reduced, and the safety and It can be dismantled efficiently residual iron 10.

  Specifically, the hydraulic crawler drill 110 that includes the hydraulic drill device 130 that drills downward and can travel on the residue 10 follows the dividing line L set in the dividing line setting step (step s1) in the previous step, and is predetermined. A plurality of divided holes 20 separated by the interval S can be efficiently drilled.

  More specifically, in this drilling step (step s3), since the hydraulic crawler drill 110 that includes the hydraulic drill device 130 that drills downward and can run on the residue 10 is used, the drilling speed is high, and the hydraulic drill device Since the time for fixing and moving 130 can be omitted, the drilling can be efficiently performed.

  Since the divided holes 20 are perforated at a predetermined interval S, the number of perforations can be reduced as compared with the case where each of the divided holes 20 is perforated in addition to the above-described effect. ) Can be shortened. Further, since the wear of the drill 131 of the hydraulic drill device 130 of the hydraulic crawler drill 110 can be reduced by reducing the number of drillings, an increase in construction cost in the drilling process (step s3) can be suppressed.

  Further, in the drilling machine leaving step (step s4) after the drilling step (s3), the hydraulic crawler drill 110 is moved away from the residue 10, in other words, the hydraulic crawler drill 110 has drilled all the divided holes 20 and then hydraulically Although the crawler drill 110 is moved away, the plurality of divided holes 20 are drilled so that the unpierced connecting portions 21 corresponding to the predetermined interval S remain between the adjacent divided holes 20, and thus after the drilling process is completed (step s 3). Even if it exists, the hydraulic crawler drill 110 can run on the residue 10.

  That is, even after the plurality of divided holes 20 are drilled, the hydraulic crawler drill 110 can freely travel on the residue 10, so that it easily moves for drilling and is efficiently drilled by the hydraulic crawler drill 110. can do.

  Furthermore, after the drilling machine leaving step (step s4), the unpierced connecting portion 21 between the divided holes 20 can be easily broken without generating vibration and noise with the hook of the backhoe bucket, The residue 10 can be divided by the dividing line L.

  Therefore, the residue 10 can be blocked and transported as the divided block 40 easily and safely. Therefore, it is possible to safely and efficiently, that is, shorten the dismantling process and prevent an increase in construction cost required for the dismantling work.

  Further, after all the divided holes 20 have been drilled in the drilling process (step s3), that is, after the drilling process has been completed, the removal process (step s5), the splitting process (step s6), and the unloading process (step s7). ), The usage period of the hydraulic crawler drill 110 can be shortened, and the same work is repeated, so that the number of setup changes can be reduced and the construction efficiency can be improved.

  In addition, the dividing line L is divided into a circumferential dividing line Lc in the circumferential direction that divides the residue 10 in the inward / outward direction from the inside to the outside in plan view, and a radially dividing line Lr in the inside / outside direction that divides the residue 10 in the circumferential direction. With the above configuration, the residue 10 can be easily divided to form the divided block 40, and the divided divided block 40 can be easily carried out.

  Specifically, since the residue 10 is divided in the inner and outer directions by the circumferential division line Lc and divided in the circumferential direction by the radial division line Lr, a division block 40 having a size and weight that can be easily carried out can be formed. it can.

  Further, after forming the divided blocks 40, by removing and carrying out some of the divided blocks 40 in the circumferential direction, the divided blocks 40 in the same circumferential direction can be more easily divided and removed and carried out. Therefore, the residue 10 can be disassembled more efficiently.

  Further, the iron shell 31 and the iron shell 31 for removing the refractory side wall 32 that are disposed outside the residue 10 and surround the side of the residue 10 are removed (step s5), and the punching machine removal step (step s4). When the plurality of divided holes 20 with a predetermined interval S are drilled in the drilling step (step s3), the residue 10 in which the split holes 20 are drilled is performed between the divided block carrying-out process (step s7). Even if the hydraulic crawler drill 110 travels on the top, since the iron shell 31 and the fireproof side wall 32 surround and restrain the side of the residue 10, the residue 10 does not collapse and can be safely drilled. The hydraulic crawler drill 110 can be removed from the residue 10 in the machine withdrawal step (step s4).

  Further, the object to be demolished is the residue 10 remaining on the refractory bottom surface 33 of the blast furnace, and the residue 10 has higher strength than a general concrete structure. For example, in the case of dismantling with a wire saw or the like, It takes time and money. However, in the above-mentioned dismantling method, the division holes 20 can be efficiently drilled in the residue 10 by the hydraulic crawler drill 110 to form the division block 40, and the division can be dismantled.

  Further, since the dividing line L is set so that the weight of the divided block 40 obtained by dividing the residue 10 is a weight that can be carried out, the specific gravity is higher than that of a normal concrete block or the like. Even if the residue 10 is likely to exceed the load weight to be loaded on, the above-mentioned dismantling method can efficiently pierce the divided holes 20 and easily form the divided blocks. Can be configured well.

  In the above description, the residue 10 having a circular shape in plan view is considered as a bottom slab, and is intended for dismantling. However, even when a floor slab that is a general concrete structure is dismantled, the above-described effects can be obtained. it can. Moreover, even if the dismantling target is not circular in plan view, it may be polygonal in plan view, for example. In this case, the circumferential direction dividing line Lc that divides the residue 10 and the bottom plate in the inner and outer directions can have a shape similar to a polygon in plan view.

In correspondence between the configuration of the present invention and the above-described embodiment,
The floor slab or residue of this invention corresponds to the residue 10,
Similarly,
The drilling means corresponds to the hydraulic drill device 130,
The drilling machine corresponds to the hydraulic crawler drill 110,
The divided blocks correspond to the divided block 40 and the outer circumferential divided block 40a.
The inner and outer direction division lines correspond to the radial direction division lines Lr,
The side wall member corresponds to the iron skin 31 and the fireproof side wall 32,
The furnace refractory corresponds to the refractory bottom 33,
The dividing line setting process corresponds to step s1,
The drilling process corresponds to step s3,
The drilling machine leaving process corresponds to step s4,
The side gob member removal process corresponds to step s5,
The divided block carry-out process corresponds to step s7,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the above description of dismantling the residue 10, the residue 10 was originally drilled with the hydraulic crawler drill 110 while leaving the iron shell 31 and the fireproof side wall 32 surrounding the side of the residue 10. After removing the iron shell 31 and the fireproof side wall 32 that surround the side of the rod 10, the residue 10 may be drilled with the hydraulic crawler drill 110. In this case, the predetermined interval S between the adjacent divided holes 20 is set to an interval that allows the hydraulic crawler drill 110 to travel on the upper surface without the iron skin 31 and the fireproof side wall 32 that restrain the side. It is preferable to do.

  Furthermore, when dismantling a member to be dismantled that does not have a member that surrounds the side, such as a concrete floor slab, a surrounding member that surrounds the side to be dismantled is newly installed before the drilling step (step s3). Then, the drilling step (step s3) may be performed. Thereby, the effect similar to the above-mentioned description can be acquired.

DESCRIPTION OF SYMBOLS 10 ... Residue 20 ... Divided hole 31 ... Iron skin 32 ... Refractory side wall 33 ... Refractory bottom face 40 ... Divided block 40a ... Outer peripheral divided block 110 ... Hydraulic crawler drill 130 ... Hydraulic drill device L ... Divided line Lc ... Circumferential divided line Lr ... radiation direction dividing line S ... predetermined interval

Claims (5)

A demolition method for dismantling the floor slab,
A dividing line setting step for setting a dividing line for dividing the floor slab;
A drilling machine comprising a drilling means for drilling downward and capable of traveling on the floor slab, and drilling a plurality of divided holes along the dividing line and spaced apart by a predetermined interval over the dividing line. Process,
After completion of drilling, a drilling machine leaving step for moving the drilling machine out of the floor slab,
A dismantling method comprising a divided block carrying-out step in which the floor slab is divided along the dividing line by a plurality of the divided holes separated by a predetermined interval and carried out as divided blocks. The dividing line is
A circumferential circumferential dividing line that divides the floor slab in an inner / outer direction from the inner side to the outer side in plan view;
The dismantling method according to claim 1, wherein the floor slab is constituted by the inner and outer direction dividing lines that divide the slab in the circumferential direction. A side wall member removing step that is disposed outside the floor slab and removes a side wall member that surrounds a side of the floor slab,
The dismantling method according to claim 1 or 2, wherein the dismantling method is performed after the perforating machine leaving step and before the divided block unloading step. The demolition method according to any one of claims 1 to 3, wherein the floor slab is a residue left on a bottom refractory of a blast furnace. The dismantling method according to any one of claims 1 to 4, wherein the dividing line is set so that a weight of a divided block obtained by dividing the residue becomes a weight that can be carried out.

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