JP6533550B2 - Method of dismantling tower supported chimney - Google Patents

Description

  The present invention relates to a method for disassembling a tower-supported chimney, and more particularly to a method for disassembling a tower-supported chimney that can easily and safely disassemble the tower-supported chimney without using a large crane. .

  Patent Document 1 discloses an example of a method for disassembling a tower-supported chimney. The following dismantling method of the tower-supported chimney is referred to as a conventional dismantling method and will be described with reference to the drawings.

  Fig. 9 is an explanatory view showing a conventional dismantling method, in which (a) is a drawing in which the cylinder body 11A is removed, (b) is a drawing in which the cylinder body 11B is removed, and (c) is a drawing of a steel tower by a crawler crane. After removing the middle part 12B, the figure which removed the cylinder body 11C and the cylinder body 11D, (d) changed the hanging position of the cylinder body by the jack, (e), the cylinder body 11I from the cylinder body 11E (F) is a diagram in which the hanging position of the cylinder body by the jack is changed, and (g) is a diagram in which the top of the cylinder body is disassembled.

  The conventional disassembly method consists of the following steps.

(First tube part dismantling process)
First, as shown in FIG. 9A, the tube body 11 is partially disassembled. That is, the jack 15 is attached to the second support point S2 of the steel tower 12, the lower end of the cylindrical body 11 is cut at a cutting position 20 by a predetermined length while supporting the cylindrical body 11 by the jack 15 and the cut cylindrical body 11A is cut. After being mounted on the transport carriage 21 and removed, the cylinder body 11 is jacked down. At this time, the jack-down operation can be performed easily and safely by supporting and guiding the jack-down of the cylindrical body 11 by the guide rollers 16 provided in the steel tower 12 which is stably standing by itself. Reference numerals 17 and 18 in the drawing denote reinforcing members, and reference numeral 22 denotes a rail on which the transport carriage 21 travels. Then, as described above, the lower end portion of the cylinder body 11 is cut and removed and jacked down, and as shown in FIG. 9B, the cylinder body 11B is cut and removed to substantially support the cylinder body 11 as the fourth support. Dismantle until the height of the point S4 is reached.

(Medium part dismantling process of steel tower)
Next, in a state where the upper portion 12A of the steel tower 12 is held by the cylindrical body 11, as shown in FIG. 9B, the middle portion 12B of the steel tower 12 is disassembled and removed using the crawler crane 30. Here, the upper portion 12A of the steel tower 12 is a portion between the third support point S3 and the fourth support point S4, and the middle portion 12B of the steel tower 12 is a portion between the second support point S2 and the third support point S3. It is a part between.

(Second tube part dismantling process)
Next, cutting and removing the lower end portion of the tube body 11 and jacking down are repeated in the same manner as the tube body partial disassembling process described above, and as shown in FIG. 9C, the tube bodies 11C and 11D are cut away and removed. Then, the upper part 12A of the steel tower 12 is dismantled and removed until it becomes a position approaching the lower part 12C of the steel tower 12. Here, the lower portion 12C of the steel tower 12 is a portion below the second support point S2.

(Upper dismantling process of steel tower)
Next, as shown in FIG. 9D, the hanging position of the cylinder body 11 by the jacks 15 is changed, and the upper portion 12A of the steel tower 12 is disassembled and removed using the crawler crane 30.

(Third tube part dismantling process)
Next, in the same manner as in the partially dismantling process of the tubular body and the second disassembling process of the tubular body described above, cutting and removing the lower end portion of the tubular body 11 and jacking down are repeated, as shown in FIG. e) As shown in FIG. 9F, the cylinder bodies 11E to 11M are cut off and removed sequentially.

(Lower dismantling process of steel tower)
Finally, using the crawler crane 30, the lower portion 12C of the steel tower 12 and the remaining cylindrical body 11 are disassembled and removed. As a result, as shown in FIG. 9 (g), the dismantling of the tower-supported chimney 10 is completed.

Patent No. 4559313 gazette Patent No. 5563697 gazette Patent No. 2828430

  According to the above-mentioned conventional dismantling method, the tower supported chimney can be dismantled safely and reliably without using a super large crane equivalent to the height of the chimney, but when removing the steel towers 12A and 12B at high places. There was a problem that a large crane was required.

  Therefore, an object of the present invention is to provide a method for disassembling a tower-supported chimney that can easily and safely disassemble the tower-supported chimney without using a large crane.

  This invention was made in order to achieve the said objective, Comprising: The following is characterized.

The invention according to claim 1 is the dismantling method of an iron tower supported chimney in which a steel tower supporting the cylindrical body is constructed around a plurality of cylindrical bodies, comprising the following steps (a) to (h):
(A) A jack for lifting a cylinder body which can lift the cylinder body is installed at the lower part of the steel tower, and a steel tower block lowering jack for lowering the cut tower block with a hinge as a fulcrum at the top of the cylinder body; Jack installation step of installing a tower block hanging jack for hanging the tower block and installing a tower block guide jack for guiding the tower block suspended by the tower block hanging jack on the ground;
(B) a connecting step of connecting the lower portion of the upper stage of the steel tower and the upper portion of the next stage of the steel tower by a hinge;
(C) an iron tower cutting process for cutting the upper stage of the steel tower into a plurality of steel tower blocks;
(D) A tower block lowering step of tilting the tower block downward with the hinge as a fulcrum by operating the tower block lowering jack and the tower block guide jack.
(E) a hinge separating step of separating the hinge from the steel tower;
(F) A tower block suspension step of suspending the tower block by operating the jack for hanging the tower block, the jack for laying the tower block, and the jack for guiding the tower block,
(G) After dismantling the upper stage of the steel tower from the step (b) to the step (f), the lower portion of the cylinder body is cut in a state where the load of the cylinder body is deposited on the cylinder body lifting jack Tube removal and removal process to remove and
(H) A tubular body hanging step of suspending and lowering the tubular body by the tubular body lifting jack
The method is characterized in that the steps (b) to (h) are repeatedly performed sequentially from the upper stage to the lower stage of the steel tower.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the number of the body is four.

  The invention set forth in claim 3 is characterized in that, in the invention set forth in claim 1 or 2, the steel tower has a square planar shape.

  The invention according to a fourth aspect is the invention according to any one of the first to third aspects, wherein the steel tower block has a planar U-shape, and is characterized by being composed of two. is there.

  According to this invention, the lower part of the upper stage of the steel tower and the upper part of the next stage of the steel tower are connected by a hinge, and then the upper stage of the steel tower is cut into a plurality of steel tower blocks, and then the steel tower block is used as a hinge Lowering down, then disconnecting the hinge from the tower, then hanging down the tower block, and then cutting off the lower part of the cylinder body, and repeatedly using the process of suspending and lowering the cylinder body without using a large crane The tower supported chimney can be dismantled easily and safely.

A tower support chimney on which a jack for lifting a cylinder, a jack for lowering a tower block, a jack for lifting a tower block, and a jack for guiding a tower block guide are provided by the disassembling method of the tower supporting chimney according to the present invention. It is a top view. It is an enlarged view of the installation part of the jack for a steel tower block fall, the jack for hanging a steel tower block, and the jack for a steel tower block guide. It is an enlarged view of the installation part of the jack for body lifting. It is a top view which shows a chimney. It is a front view which shows the process of suspending the tower block of the 1st step (uppermost step) of a tower by the dismantling method of the tower support type | mold chimney of this invention. After disassembling the first step of the steel tower by the dismantling method of the steel tower support type chimney of this invention, it is a front view showing a process of cutting the lower part of the cylinder and removing it, and then suspending and lowering the cylinder. It is a front view which shows the process of changing the jack for cylinder body lifting by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows the process of hanging down the 2nd-tier steel tower block of a steel tower by the dismantling method of a steel tower support type | mold chimney of this invention. After dismantling the second stage of the steel tower by the dismantling method of the steel tower support type chimney of the present invention, it is a front view showing a process of cutting and removing the lower part of the cylinder body and then suspending and lowering the cylinder body. It is a front view which shows the process of changing the jack for cylinder body lifting by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows the process of suspending the 3rd-tier steel tower block of a steel tower by the dismantling method of a steel tower support type | mold chimney of this invention. After disassembling the third stage of the steel tower by the dismantling method of the steel tower support type chimney of this invention, it is a front view showing a process of cutting the lower part of the cylinder and removing it, and then suspending and lowering the cylinder. It is a front view which shows the process of changing the jack for cylinder body lifting by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows the process of suspending the 4th-tier steel tower block of a steel tower by the dismantling method of a steel tower support type | mold chimney of this invention. After disassembling the fourth stage of the steel tower by the dismantling method of the steel tower support type chimney of this invention, it is a front view showing a process of cutting the lower part of the cylinder and removing it, and then suspending and lowering the cylinder. It is a front view which shows the process of changing the jack for cylinder body lifting by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view showing a process of suspending a tower block lowering jack, a tower block hanging jack, and a tower block guide jack by a crane according to the disassembling method of a tower supporting chimney of the present invention. It is a front view which shows the process of suspending and lowering a lower part of a cylinder after removing the lower part of a cylinder by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows the process of changing the jack for cylinder body lifting by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows the process of suspending and lowering a lower part of a cylinder after removing the lower part of a cylinder by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows the process of removing a cylinder body top part by the dismantling method of the tower support type | mold chimney of this invention. It is a front view which shows the process of removing the cylinder body lifting jack by a crane by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows the process of dismantling the lowest stage (5th stage) of a steel tower by the dismantling method of a steel tower support type | mold chimney of this invention. It is a front view which shows a hinge part. It is a side view showing a hinge part. It is a front view which shows the state which turned down the steel tower block on the hinge as a fulcrum. It is the figure which removed 11 A of cylinder bodies by the conventional dismantling method. It is the figure which removed cylinder body 11B by the conventional dismantling method. It is the figure which removed 11 C of cylinder bodies and 11 D of cylinder bodies after removing intermediate part 12B of a steel tower with a crawler crane by the conventional dismantling method. It is the figure which changed the suspension position of the cylinder body by a jack by the conventional dismantling method. It is the figure which removed cylinder body 11I from cylinder body 11E by the conventional dismantling method. It is the figure which changed the suspension position of the cylinder body by a jack by the conventional dismantling method. It is a figure which disassembles the top of a cylinder by the conventional disassembling method.

  One embodiment of a method of disassembling a tower-supported chimney of the present invention will be described with reference to the drawings.

  FIG. 1 shows a tower support provided with a jack for lifting a cylindrical body, a jack for lowering a tower block, a jack for lifting a tower block, and a jack for guiding a tower block guide according to the disassembling method of the tower supporting chimney of the present invention. 2 is a plan view showing a chimney, FIG. 2 is an enlarged view of an installation portion of a steel tower block lowering jack, a steel tower block hanging jack, and a steel tower block guide jack, FIG. 3 is an installation of a cylindrical body lifting jack FIG. 4 is a plan view showing a chimney, with an enlarged view of a part.

  In FIGS. 1 to 4, reference numeral 1 denotes a plurality (four in this example) of cylinder bodies, and 2 denotes an iron tower constructed on the outside of four cylinder bodies 1 to support the cylinder body 1. In this example, as shown in FIG. 1, the steel tower 2 is divided into five stages, ie, the first stage (uppermost stage), the second stage, the third stage, the fourth stage, and the fifth stage (lowermost stage). Dismantle and remove. The tower 2 has a plane shape square, as shown in FIG.

  Reference numeral 3 denotes an elevator shaft (see FIG. 4) installed at the central part of the four cylindrical bodies 1, and the elevator is used, for example, when constructing a scaffold.

  Reference numeral 4 denotes a cylinder lifting jack installed at the lower part of the steel tower 2 and capable of lifting the cylinder 1. For example, a large-sized jack disclosed in Patent Document 2 is used as the cylinder body lifting jack 4.

  Reference numeral 5 denotes a steel tower block lowering jack installed at the top of the cylinder body 1, which is used when the steel tower block 2 a having a cut flat shape C-shape to be described later is used as a fulcrum to be described later. is there.

  6 is a jack for hanging the steel tower block installed at the top of the cylinder 1 and is a jack used when hanging down the steel tower block 2a.

  Reference numeral 7 is a jack for a steel tower block guide installed on the ground, and is a jack used to guide the steel tower block 2 a suspended by the steel tower block hanging jack 6.

  As the steel tower block lowering jack 5, the steel tower block lifting jack 6, and the steel tower block guide jack 7, for example, a small jack disclosed in Patent Document 3 is used.

  8 is a hinge which connects the lower part of the tower block 2a and the upper part of the uncut tower 2.

  Next, the method of disassembling a chimney by the method of disassembling a tower-supported chimney according to the present invention will be described.

(A) Process (jack installation process)
First, as shown in FIG. 5A, FIG. 2 and FIG. 3, a cylinder lifting jack 4 capable of lifting the cylinder body 1 is installed at the lower part of the steel tower 2 and cut at the top of the cylinder body 1 A steel tower block lowering jack 5 for lowering the steel tower block 2a with the hinge 8 as a fulcrum 8 and a steel tower block hanging jack 6 for suspending the steel tower block 2a are installed and suspended by the steel tower block hanging jack 6 on the ground. A jack 7 for guiding a steel tower block for guiding the steel tower block 2a to be mounted is installed.

(B) Process (connection process)
Next, as shown in FIG. 5 (a) and FIG. 2, the first stage of the iron tower 2, ie, the lower portion of the uppermost stage of the steel tower 2, and the second stage of the steel tower 2, ie, the upper portion of the next stage, are hinged Connect by 8.

(C) Process (steel tower cutting process)
Next, the first stage of the tower 2 is cut into two square U-shaped tower blocks 2a. That is, as shown by the cutting line (A-A) in FIG. 2 and FIG. 5 (a), the first stage of the steel tower 2 is cut in the height direction, and the cutting line in FIG. As shown in), horizontally cut the steel tower of the hinge 8 part.

(D) (steel tower block defeat process)
Next, as shown in FIG. 5A, the steel tower block lowering jack 5 and the steel tower block guiding jack 7 are operated to lower the first steel tower block 2a downward with the hinge 8 as a fulcrum.

(E) (hinge separation process)
Next, the hinge 8 is separated from the steel tower 2. The cutting line at this time is shown by (C-C) in FIG.

(F) (pile tower block lifting process)
Next, as shown in FIG. 5 (a), the steel tower block hanging jack 6, the steel tower block lowering jack 5, and the steel tower block guiding jack 7 are operated to make the first stage steel tower block 2a. Hang it on the ground. That is, while adjusting the steel tower block hanging jack 6 and the steel tower block lowering jack 5, the steel tower block 1a is hung down, the steel tower block guiding jack 7 is stretched near the ground, and the steel tower block 1a is gradually Return to horizontal position and sit on the ground.

(G) (incision removal process)
Next, after disassembling the first stage of the steel tower 2 by the process (b) to the process (f), the lower part of the tubular body 1 is loaded with the load of the tubular body 1 by the tubular body lifting jack 4 Disconnect and remove. The cutting line at this time is shown by (D-D) in FIG. 5 (b) (the same applies to the steps described later).

(H) Tube Body Hanging Step Next, as shown in FIG. 5 (b), the cylinder body 1 is suspended by the cylinder body lifting jack 4 on the ground every cutting and removal. The elevator shaft 3 is cut at the time of cutting the cylinder body 1 and removed. The same applies to the following steps.

  Thus, when the first stage of the steel tower 2 is dismantled, the steps (b) to (h) are repeated sequentially from the second stage to the fourth stage of the steel tower 2.

  That is, after dismantling the first stage of the steel tower 2, as shown in FIG. 5 (c), after replacing the jack 4 for lifting the body, as shown in FIG. 5 (d), 2 of the steel tower 2 The lower part of the stage and the upper part of the third stage of the steel tower 2 are connected by a hinge 8.

  Next, the second stage of the steel tower 2 is cut into two square U-shaped steel tower blocks 2a.

  Next, as shown in FIG. 5 (d), the steel tower block lowering jack 5 and the steel tower block guiding jack 7 are operated to lower the second steel tower block 2a downward with the hinge 8 as a fulcrum.

  Next, the hinge 8 is separated from the steel tower 2.

  Next, the steel tower block hanging jack 6, the steel tower block lowering jack 5, and the steel tower block guiding jack 7 are operated to suspend the second steel tower block 2a on the ground.

  Next, after dismantling the second stage of the steel tower 2 in the above process, the lower part of the cylinder 1 is cut and removed in a state where the load of the cylinder 1 is deposited on the cylinder lifting jack 4.

  Next, as shown in FIG. 5 (e), the cylinder body 1 is suspended by the cylinder body lifting jack 4 on the ground every cutting and removal.

  Next, as shown in FIG. 5 (f), after replacing the jack 4 for lifting the body, as shown in FIG. 5 (g) to FIG. 5 (j), the third to fourth steps of the steel tower 2 are carried out. The same process is repeated for the eyes, and the third to fourth stages of the steel tower 2 are disassembled.

  In this way, when the first to fourth steps of dismantling of the steel tower 2 are completed, as shown in FIG. 5 (k), the cylinder 1 is lifted by the cylinder lifting jack 4 and the ground is removed each time it is removed. Hang it down.

  Next, as shown in FIG. 5 (l), the cylinder lifting jack 4 is changed.

  Next, as shown in FIG. 5 (m), the steel tower block lowering jack 5 and the steel tower block hanging jack 6 are suspended by the crane 9 on the ground.

  Next, as shown in FIG. 5 (n), the lower portion of the cylinder body 1 is cut and removed, and then the cylinder body 1 is suspended by the cylinder body lifting jack 4.

  Next, as shown in FIG. 5 (o), the cylinder lifting jack 4 is changed.

  Next, as shown in FIG. 5 (p), the lower part of the cylinder 1 is cut and removed, and then the step of suspending the cylinder 1 with the cylinder lifting jack 4 is repeated.

  Next, as shown in FIG. 5 (q), the tube top 1a is removed.

  Next, as shown in FIG. 5 (r), the cylinder lifting jack 1 b is removed by the crane 9.

  Next, as shown in FIG. 5 (s), the fifth stage of the steel tower 2 is disassembled.

  As described above, the tower-supported chimney can be disassembled according to the present invention.

  According to this invention, after the first stage of the steel tower 2 and the second stage of the steel tower are connected by the hinge 8, the first stage of the steel tower 2 is cut into two steel tower blocks 2a, and then the steel tower block 2a is The hinge 8 is used as a fulcrum to lower the steel block downwards by the steel tower block lowering jack 5 and the steel tower block guide jack 7 and then the hinge 8 is separated from the steel tower 2, and then the steel tower block 2a is suspended for the steel tower block hanging jack 6 The block lowering jack 5 and the steel tower block guide jack 7 are operated and suspended, and then the lower portion of the tubular body 1 is cut, and then the tubular body 1 is repeatedly hung up and down with the tubular lifting jack 4 Thus, the tower-supported chimney can be easily and safely disassembled without using a large crane.

1: Tube body 1a: Tube body top 2: Iron tower 2a: Tower block 3: Elevator shaft 4: Jack for lifting the cylinder 5: Jack for tilting the tower block 6: Jack for lifting the tower block 7: Jack for jack of the tower block guide 8 Reference Signs List: Hinge 9: Crane 11: Body 12: Tower 15: Jack 16: Guide roller 17: Reinforcement 18: Reinforcement 20: Cutting position 21: Transport bogie 22: Rail 30: Crawler crane

Claims (4)

A dismantling method of a tower supporting chimney in which a steel tower supporting the cylindrical body is constructed around a plurality of cylindrical bodies, comprising the following steps (a) to (h):
(A) A jack for lifting a cylinder body which can lift the cylinder body is installed at the lower part of the steel tower, and a steel tower block lowering jack for lowering the cut tower block with a hinge as a fulcrum at the top of the cylinder body; Jack installation step of installing a tower block hanging jack for hanging the tower block and installing a tower block guide jack for guiding the tower block suspended by the tower block hanging jack on the ground;
(B) a connecting step of connecting the lower portion of the upper stage of the steel tower and the upper portion of the next stage of the steel tower by a hinge;
(C) an iron tower cutting process for cutting the upper stage of the steel tower into a plurality of steel tower blocks;
(D) A tower block lowering step of tilting the tower block downward with the hinge as a fulcrum by operating the tower block lowering jack and the tower block guide jack.
(E) a hinge separating step of separating the hinge from the steel tower;
(F) A tower block suspension step of suspending the tower block by operating the jack for hanging the tower block, the jack for laying the tower block, and the jack for guiding the tower block,
(G) After dismantling the upper stage of the steel tower from the step (b) to the step (f), the lower portion of the cylinder body is cut in a state where the load of the cylinder body is deposited on the cylinder body lifting jack Tube removal and removal process to remove and
(H) A tubular body hanging step of suspending and lowering the tubular body by the tubular body lifting jack
A method of disassembling a tower-supported chimney, comprising repeatedly performing the steps (b) to (h) sequentially from the upper stage to the lower stage of the steel tower.   The method for disassembling a tower-supported chimney according to claim 1, wherein the number of the cylindrical body is four.   The method according to claim 1 or 2, wherein the iron tower has a square planar shape.   The method for disassembling a tower-supporting chimney according to any one of claims 1 to 3, wherein the tower block has a U-shaped planar shape and consists of two.

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