JP5635856B2 - Removal method of floor slab penetration of existing pipe - Google Patents

Description

  The present invention relates to a method for removing a floor slab penetrating portion of an established pipe for drainage or water supply provided through a floor slab of a building.

When building a new building, when piping through the floors and walls, which are fire prevention compartments, open a sleeve (a hole through which the pipe penetrates) with a void pipe (paper pipe) etc. when placing the building concrete in the building. In general, the gap between the pipe and the sleeve is filled with mortar without any gap.
The fire prevention zone is a floor or wall having a structure that prevents the fire from spreading to the next room or the upper floor, and it is necessary to fill the circumference of the pipe with a non-combustible material such as mortar without any gaps. As the pipe material, non-combustible material or metal pipe such as SGP (steel pipe), cast iron pipe, coated steel pipe with high fire resistance is used.

By the way, the piping as described above needs to be renewed when the service life has passed.
As a method for updating an established pipe, a method as shown in FIG. 11 described below and a method as shown in FIG. 12 (see Patent Document 1) have been conventionally used.

[Method of FIG. 11]
(1) As shown in FIG. 11A, the existing pipe P provided so as to penetrate the floor slab S is cut at the top and bottom of the floor slab S.
(2) As shown in FIG. 11 (b), a cylindrical cutting / removing portion P1 which is the remaining portion supported by the floor slab S is used as a rock drill or the like around the cutting / removing portion P1 of the floor slab S. Is removed by picking up using the lifting machine 100.
(3) After inserting a new piping material P2 into the through hole H1 of the floor slab S generated by removing a part of the cut and removed portion P1 and the surrounding floor slab S as shown in FIG. A gap between the through hole H1 and the piping material P2 is filled with mortar (not shown).

[Method of FIG. 12]
(1) As shown in FIG. 12A, the established pipe P provided so as to penetrate the floor slab S is cut above and below the floor slab S.
(2) As shown in FIG. 12 (b), the cutting and removal portion P1 remaining in the state supported by the floor slab S is cylindrical around the cutting and removal portion P1 of the floor slab S using a cutting machine 200 such as a core drill. It is removed together with a part of the floor slab S around the cutting and removing part P1 by cutting out into a shape.
(3) As shown in FIG.12 (c), after inserting new piping material P2 in the through-hole H1 of the floor slab S produced by removing the cutting removal part P1, the clearance gap between the through-hole H1 and the piping material P2 Is filled with mortar (not shown).

However, in the method as described above, when the floor slab S is hung with the lifting machine 100 or when the floor slab S is cut with the cutting machine 200, large vibrations, noises and dust are generated. There's a problem.
In other words, in the pipe renewal method as described above, the construction is performed while the residents live, unlike the case where the construction is a new construction. Therefore, the noise, vibration, and dust generated by the renovation pipe renovation work give residents a great discomfort. Especially in apartment houses such as high-rise apartments, many residents are uncomfortable.

Therefore, an updating method as shown in FIGS. 13 and 14 has been proposed. That is, as shown in FIGS. 13B and 14, this method has been developed by using a hydraulic tool 300 in which the cutting and removing portion P1 of the floor slab S is disposed on the floor slab S. Yes.
If this extraction method is used, compared with the above two methods, generation of noise, vibration, and dust can be extremely reduced when removing the cut and removed portion P1.
In addition, a floor slab through hole is formed along the outer shape of the floor slab penetrating portion of the cutting and removing portion P1 by drawing, and the new stand pipe is configured with a piping material having an outer shape substantially coinciding with the floor slab through hole. Most of the backfilling work such as mortar filling can be done easily and at low cost.

Japanese Patent Laid-Open No. 2006-200656

However, as described above, the method of pulling out using the hydraulic tool 300 has the following problems.
In other words, since the gas pipes, meter devices, etc. are generally installed along the water supply and drainage pipes, the work space is often very narrow. Accordingly, the above-described bulky and heavy hydraulic tool 300 cannot be easily installed. Moreover, it is very troublesome to transport the heavy hydraulic tool 300 from floor to floor.

  In the present invention, in view of the above circumstances, when the existing pipe that penetrates the floor slab is updated to a new pipe, the floor slab penetration portion of the existing pipe is pulled upward and removed, even in a narrow work space. It aims at providing the removal method of the floor slab penetration part of the existing establishment pipe which can be pulled out easily.

  In order to achieve the above object, a method for removing a floor slab penetrating portion of an established pipe according to claim 1 of the present invention (hereinafter referred to as “method for removing claim 1”) is provided for each floor of a multi-layered building. A method for removing a floor slab penetrating portion of an existing pipe provided through a floor slab, by cutting and removing the existing pipe above and below the floor slab penetrating portion penetrating the floor slab on one floor A step between the floor slab and the one floor slab so that the distance from the upper end of the cut and removed portion to the upper end of the cut and removed portion is equal to or greater than the vertical dimension of the cut and removed portion. A step of excising an established pipe, a step of supporting and fixing a traction device having a traction line body above the excised portion of the established pipe, and cutting and removing the lower end of the traction line body of the traction device Fixing the upper part of the floor above the floor slab and operating the traction device It is characterized in that it comprises a a step of withdrawing upwardly the cutting removal portion from the floor slab by pulling the towing striatum Te.

The method for removing a floor slab penetrating portion of an existing pipe according to claim 2 of the present invention (hereinafter referred to as “the removal method of claim 2”) is provided through the floor slab of each floor of the multi-layer building. The method for removing the floor slab penetration part of the established pipe, the step of cutting the established pipe above and below the floor slab penetration part penetrating the floor slab of one floor to form a cut and removal part, Cutting the existing pipe between the floor slab and one floor slab so that the distance from the upper end of the cut and removed portion to the upper end of the cut and removed portion is equal to or greater than the vertical dimension of the cut and removed portion; Cutting a part of the existing pipe on any floor slab on the upper floor from the floor slab in which the cut and removed part is formed , providing an upper cut part, and forming an opening in a part of the existing pipe; and , the lower end of the upper already established tubes rest which is formed by providing the upper cut portion, also , To the frame of the upper cut portion is constructed on the floor slab that is provided, through previously established pipe comprising the steps of supporting and fixing the traction device, the towing umbilical member from said opening having a towing striatum, the cutting removal and fixing the lower end part, it is characterized in that it comprises a a step of withdrawing upwardly from the floor slab the cutting removal unit by pulling the towing striatum by operating the traction device.

  The method for removing a floor slab penetrating portion of an established pipe according to claim 3 of the present invention (hereinafter referred to as “the removal method of claim 3”) is provided through the floor slab of each floor of the multi-layer building. The method for removing the floor slab penetration part of the established pipe, the step of cutting the established pipe above and below the floor slab penetration part penetrating the floor slab of one floor to form a cut and removal part, Cutting the existing pipe between the floor slab and one floor slab so that the distance from the upper end of the cut and removed portion to the upper end of the cut and removed portion is equal to or greater than the vertical dimension of the cut and removed portion; Removing the upper cover of the existing pipe from the protruding portion of the roof and opening the upper end of the existing pipe, and installing a pedestal on the roof, and supporting and fixing a traction device having a traction line on the pedestal Step, through the already established pipe from the opening through the traction line, A step of fixing the lower end of the cutting and removal portion, and a step of pulling the cutting and removal portion upward from the floor slab by operating the traction device and pulling up the traction line body. .

  In the present invention, the traction device is not particularly limited, but is preferably as lightweight and not bulky as easy to carry. Examples thereof include a chain block and a winch. Moreover, these may be manual or equipped with a small electric hoisting device with a remote controller.

Since the removal method of the said Claim 1-Claim 3 of this invention is comprised as mentioned above, even if it is a case where the working space around the floor slab penetration part to remove is narrow, it is noise at the time of construction. The occurrence of vibration and dust is small, and the floor slab penetrating portion of the existing pipe can be easily removed.
And a new standing pipe can be piped using the floor slab penetration hole left by removing a floor slab penetration part as it is.

FIG. 5 is a schematic diagram showing one embodiment of the removal method of claim 1 of the present invention and explaining the step of forming the cut and removed portion. It is the schematic explaining the process of removing the cutting part of the removal method of FIG. It is the schematic explaining the mounting process of the chain block of the removal method of Claim 1 of FIG. It is a principal part enlarged view of FIG. It is the schematic explaining the extraction process of the cutting removal part of the removal method of FIG. It is the schematic explaining the post process of FIG. FIG. 5 is a schematic view showing an embodiment of a removal method according to claim 2 of the present invention and explaining a chain block mounting step. FIG. 5 is a schematic diagram showing an embodiment of a removal method according to claim 4 of the present invention and explaining a chain block mounting step. It is the schematic which represents one Embodiment of the removal method of Claim 3 of this invention, and demonstrates the attachment process of a chain block. It is a principal part enlarged view of FIG. It is a figure explaining the update method using the suspension of the conventional floor slab. It is a figure explaining the renewal method using cutting of the conventional floor slab. It is a figure explaining the update method using extraction of the conventional existing piping. It is a perspective view of the hydraulic tool used for the updating method of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 6 show an embodiment of the removal method of claim 1 of the present invention in the order of the steps.

This removal method is designed to go through the following steps.
(A1) As shown in FIG. 1, the existing pipe 1 along the upper and lower cutting lines L ₁ and L ₂ of the floor slab penetrating portion of the existing pipe 1 to be renewed that penetrates the floor slab S on the lowest floor. 1 is cut to form a cut-off portion 11. In FIG. 1, reference numeral 10 denotes a cap provided so as to allow ventilation so that rainwater does not enter the established pipe 1 from the upper end of the established pipe 1 exposed from the rooftop R.
(A2) As shown in FIG. 2, the floor slab S and one upper floor so that the distance from the upper end of the cut / removal part 11 to the upper end of the cut / removal part 12 is not less than the vertical dimension of the cut / removal part 11. The excision part 12 of the existing tube 1 between the slab S is excised.
(A3) As shown in FIG. 3, by removing the cut portion 12, the substantially central axis of the existing tube 1 passes through the lower end portion of the existing tube remaining portion 1 a above the cut portion 12 of the existing tube 1. After two through holes are horizontally drilled, the first shaft 2a is inserted between the through holes. Although not shown, the nuts are screwed onto the screws provided at both ends of the first shaft 2a so that the nuts are supported at the lower ends of the remaining cut portions of the established pipe 1 in a retaining state.
Further, the second shaft 2b is also supported by the portion of the cutting and removing portion 11 protruding above the floor slab S in the same manner as the first shaft 2a. In addition, the attachment position of the 2nd shaft 2b of the cutting | disconnection removal part 11 is thick, and the joint 11a part with comparatively strong strength is preferable.
(A4) As shown in FIGS. 3 and 4, the block body 31 of the chain block 3 as a traction device is supported in a suspended state on the first shaft 2 a via the hook 31.
(A5) As shown in FIGS. 3 and 4, after hooking the hook 34 provided at the lower end of the chain 33 of the chain block 3 to the second shaft 2b, the chain 33 is pulled up as shown in FIG. The cutting / removing part 11 is pulled out above the floor slab S, and the cutting / removing part 11 is removed as shown in FIG.

That is, according to this removal method, among the existing pipes 1 that are desired to be removed, the fixing force to the floor slab S of the existing pipe 1 part that is continuously piped across the multi-story floor above the cutting and removing part 11 is utilized. By using the chain block 3 which is a general-purpose traction device, cutting including the floor slab penetration part of the required floor in a narrow space where water supply standpipe, drainage standpipe, gas piping, meter equipment, etc. are installed The removal part 11 can be removed.
If the above removal method is used, the above method is repeated in order from the lower floor to the upper floor, so that noise, vibration, and dust are extremely small, and the entire existing piping can be easily removed in a small space. it can.

In addition, since the cutting and removing portion 11 is simply pulled upward, the inner diameter of the floor slab penetrating portion of the cutting and removing portion 11 is substantially the same as that shown in the figure. A circumferentially shaped floor slab through hole H remains in the floor slab S.
Therefore, by using this floor slab through hole H as it is, the newly established pipe can be piped without much downsizing, and the newly established pipe can be easily piped.

  Furthermore, since a small chain block 3 having a traction force necessary for pulling out the cutting and removing portion 11 for the first floor can be used, even when the chain block 3 is sequentially replaced with an upper floor, one person work, etc. Easy to do.

  FIG. 7 shows a part of the process of one embodiment of the removal method of claim 2 of the present invention.

This removal method is designed to go through the following steps.
(B1) While carrying out the steps (A1) and (A2) of the removal method of claim 1 above, as shown in FIG. A part of the upper portion 15 is cut out by the length of the interval at which the chain block 3 can be inserted.
(B2) The 2nd shaft 2b is fixed to the cutting removal part 11 using the method similar to the description in the process (A3) of the removal method of the said Claim 1.
(B3) As shown in FIG. 7, a through hole is opened in the lower end portion of the upper established pipe remaining portion 1b remaining above the upper cutting portion 15 in the same manner as the removing method of the first aspect. The shaft 2a is inserted and fixed, and the block body 31 of the chain block 3 is supported in a suspended state on the first shaft 2a via the hook 32.
(B4) As shown in FIG. 7, the chain 33 of the chain block 3 is cut and removed from the upper end opening of the lower established pipe remaining portion 1c remaining below the upper cutting portion 15 through the lower established pipe remaining portion 1c. After hanging down to the part 11 and hooking the hook 34 provided at the lower end of the chain 33 on the second shaft 2b, the chain 33 is pulled up, and the cutting and removing part 11 is pulled out above the floor slab S.

According to this removal method, a chain block that is a general-purpose traction device in a narrow space where a water supply standpipe, a drainage standpipe, a gas pipe, a meter device, and the like are installed as in the removal method of claim 1 3 can be used to remove the cutting and removing portion 11 including the floor slab penetrating portion of the required floor.
And if the removal method of the lower floor is completed if the above-mentioned removal method is used, the floor where the block main body 31 is supported and fixed is simply provided on the upper floor. Thus, the floor slab penetrating portion of each floor can be easily pulled upward without performing the supporting and fixing operation of the block main body 31. That is, it is not necessary to replace the chain block 3 every time the cutting / removal portion 11 of each floor is removed, and the workability is improved.

FIG. 8 shows a part of the steps of the embodiment of the removal method according to claim 4 of the present invention.

This removal method is designed to go through the following steps.
(C1) The steps (A1) and (A2) of the removal method of claim 1 are performed.
(C2) The second shaft 2b is fixed to the cutting / removal portion 11 using the same method as described in the step (A3) of the removal method of claim 1 above.
(C3) as shown in FIG. 8, opening the first aspect of the removing method as well as through holes in the upper end of the already established tube 1, the first shaft 2a is inserted into the through-hole, is fixed, the chain block The three block main bodies 31 are supported in a suspended state on the first shaft 2 a via hooks 32 .
(C4) As shown in FIG. 8, the chain 33 of the chain block 3 is hung down to the cutting / removing portion 11 through the established pipe 1, and the hook 34 provided at the lower end of the chain 33 is attached to the second shaft. After being hooked on 2b, the chain 33 is pulled up, and the cutting and removing portion 11 is pulled out above the floor slab S.

According to this removal method, a chain block that is a general-purpose traction device in a narrow space where a water supply standpipe, a drainage standpipe, a gas pipe, a meter device, and the like are installed as in the removal method of claim 1 3 can be used to remove the cutting and removing portion 11 including the floor slab penetrating portion of the required floor.
And if the removal method of the lower floor is completed if the above-mentioned removal method is used, the floor where the block main body 31 is supported and fixed is simply provided on the upper floor. Thus, the floor slab penetrating portion of each floor can be easily pulled upward without performing the supporting and fixing operation of the block main body 31. That is, it is not necessary to replace the chain block 3 every time the cutting / removal portion 11 of each floor is removed, and the workability is improved.

  9 and 10 show a part of the steps of one embodiment of the removal method of claim 3 of the present invention.

This removal method is designed to go through the following steps.
(D1) As shown in FIGS. 9 and 10, the rain cap 10 provided at the upper end of the existing pipe 1 on the rooftop R is removed, and a frame is mounted on the rooftop R so as to straddle the upper part of the existing pipe remaining portion 1d. 4 is installed. Although the gantry 4 is not illustrated, for example, steel materials such as angles are connected and assembled using bolts and nuts.
(D2) The block body 31 of the chain block 3 is supported and fixed to the mount 4 so that the upper end of the existing pipe 1 faces from above.
(D3) The steps (A1) and (A2) are performed.
(D4) The 2nd shaft 2b is fixed to the cutting removal part 11 using the method similar to the description in the process of said (A3).
(D5) As shown in FIGS. 9 and 10, the chain 33 of the chain block 3 passes through the existing pipe remaining portion 1d from the upper end opening of the existing pipe remaining portion 1d protruding to the rooftop R, and is cut and removed. The hook 34 provided at the lower end of the chain 33 is hooked on the second shaft 2b, the chain 33 is pulled up, and the cutting and removing portion 11 is pulled out above the floor slab S.

In the case of this removal method, since the gantry 4 is installed on the rooftop R and the block body 31 of the chain block 3 is supported on the gantry 4, the floor slab penetrating portion can be easily obtained even when the work space on each floor is extremely small. The cutting removal part 11 containing can be extracted upwards.
And if the said removal method is utilized, if the removal of the cutting removal part 11 of a lower floor is completed, the block main body 31 will reach the rooftop R only by providing the cutting removal part 11 in the next upper floor. Until then, the cutting and removing part 11 including the floor slab penetrating part on each floor can be easily pulled out without performing the supporting and fixing work of the block main body 31. That is, it is not necessary to replace the chain block 3 every time the cutting / removal portion 11 of each floor is removed, and the workability is improved.

Further, since the gantry 4 is installed on the rooftop R, and the load at the time of pulling out each of the cutting and removing portions 11 from the floor slab S is received by the floor surface of the rooftop R, the above-mentioned claims 1 and 2 Unlike the removal method, the load at the time of pulling is not applied around the floor slab through hole.
Therefore, cracks or the like are generated around the floor slab through-hole due to the above load, and when the upper floor cut-and-removed portion 11 is pulled out, the crack is caused to cause the periphery of the floor slab through-hole to be lost, and when a new standing pipe is installed The trouble of repairing the missing part can be prevented as much as possible.

The present invention is not limited to the above embodiment. For example, in the above embodiment, a through hole is provided in the cut and removed portion and the existing pipe remaining portion, and a shaft is passed through the through hole, and a hook of a chain block is hooked on the shaft. Tighten and fix around the removal part and the remaining part of the existing pipe, and attach the traction devices such as chain blocks and winches to the device main body and the traction line body on the locking protrusions and locking rings protruding around the annular clamp. May be fixed.
Further, in the embodiment of the removal method of claim 2, the chain block is supported and fixed to the lower end of the remaining portion of the existing pipe. However, if the floor is provided with a space for installing the gantry, the chain block is claimed. The base used for the removal method may be installed on the floor slab, and the main body such as a chain block or winch may be supported and fixed to the base.

DESCRIPTION OF SYMBOLS 1 Established pipe 1a Established pipe remainder 1b Upper established pipe remainder 1c Lower established pipe remainder 10 Rain protection cap 11 Cutting removal part 12 Cutting part 3 Chain block (traction device)
31 Block body 33 Chain (traction line)
4 frame R rooftop S floor slab

Claims (4)

A method for removing a floor slab penetrating portion of an existing pipe provided through a floor slab of each floor of a multilayer building,
Cutting the existing pipes above and below the floor slab penetrating portion that penetrates the floor slab on one floor to form a cut and removed portion;
The step of cutting the existing pipe between the floor slab and the one floor slab so that the distance from the upper end of the cut and removed portion to the upper end of the cut and removed portion is not less than the vertical dimension of the cut and removed portion When,
A step of supporting and fixing a traction device having a traction line body in a portion above the cut portion of the established pipe;
Fixing the lower end of the traction line of the traction device to a portion above the floor slab of the cutting and removing portion; and
And a step of pulling the cutting and removing portion upward from the floor slab by operating the pulling device to pull up the pulling striated body, and a method for removing the floor slab penetration portion of the existing pipe. A method for removing a floor slab penetrating portion of an existing pipe provided through a floor slab of each floor of a multilayer building,
Cutting the existing pipes above and below the floor slab penetrating portion that penetrates the floor slab on one floor to form a cut and removed portion;
The step of cutting the existing pipe between the floor slab and the one floor slab so that the distance from the upper end of the cut and removed portion to the upper end of the cut and removed portion is not less than the vertical dimension of the cut and removed portion When,
Cutting the part of the existing pipe on any floor slab of the upper floor from the floor slab in which the excision and removal part is formed , providing an upper cutting part, and forming an opening in a part of the existing pipe;
A traction device having a traction line body is supported and fixed to the lower end of the upper established pipe remaining portion formed by providing the upper cut portion or a pedestal constructed on a floor slab provided with the upper cut portion. And a process of
Through already established pipe the towing umbilical member from the opening, and fixing the lower end to the cutting removal unit,
And a step of pulling the cutting and removing portion upward from the floor slab by operating the pulling device to pull up the pulling striated body, and a method for removing the floor slab penetration portion of the existing pipe.
A method for removing a floor slab penetrating portion of an existing pipe provided through a floor slab of each floor of a multilayer building,
Cutting the existing pipes above and below the floor slab penetrating portion that penetrates the floor slab on one floor to form a cut and removed portion;
The step of cutting the existing pipe between the floor slab and the one floor slab so that the distance from the upper end of the cut and removed portion to the upper end of the cut and removed portion is not less than the vertical dimension of the cut and removed portion When,
Removing the upper cover of the existing projecting pipe rooftop protruding from the rainwater and opening the upper end of the existing pipe;
A step of providing a gantry on the roof and supporting and fixing a traction device having a traction line on the gantry;
A step of fixing the lower end to the cutting and removing portion through the established line through the opening from the opening to the pulling striatum;
And a step of pulling the cutting and removing portion upward from the floor slab by operating the pulling device to pull up the pulling striated body, and a method for removing the floor slab penetration portion of the existing pipe. A method for removing a floor slab penetrating portion of an existing pipe provided through a floor slab of each floor of a multilayer building,
Cutting the existing pipes above and below the floor slab penetrating portion that penetrates the floor slab on one floor to form a cut and removed portion;
The step of cutting the existing pipe between the floor slab and the one floor slab so that the distance from the upper end of the cut and removed portion to the upper end of the cut and removed portion is not less than the vertical dimension of the cut and removed portion When,
Supporting and fixing a traction device having a traction line at the upper end of the established pipe;
Fixing the lower end of the traction line of the traction device to a portion above the floor slab of the cutting and removing portion; and
And a step of pulling the cutting and removing portion upward from the floor slab by operating the pulling device to pull up the pulling striated body, and a method for removing the floor slab penetration portion of the existing pipe.

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