JP2011257001A - Construction structure of replacement pipe and floor slab penetration piping material used for the construction structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction structure of a replacement pipe, which reduces generation of noise, vibration and dust during construction when an existing pipe penetrating a floor slab is replaced with a new pipe, and which can easily secure fire protection in the floor slab penetrating part, and to provide a floor slab penetration piping material used for the construction structure.SOLUTION: A straight pipe part 22a, which is a part of the floor slab penetration piping material 2b and on which a fireproof thermal expansion material 3 is wound, is inserted into a through-hole H from the upper part of the through-hole H after coating the upper surface of the floor slab S with a sealing agent 5 at the position where the lower end surface of the socket 22b of the floor slab penetration piping material 2b faces, so as to surround the through-hole H, formed by pulling out the existing pipe, in the floor slab S. While receiving the socket 22a by the floor slab S with the sealing agent 5 tucked under the lower end surface of the socket 22b, the fireproof thermal expansion material 3 is sandwiched, around the entire outer periphery, between the outer peripheral surface of the straight pipe part 22a and the inner peripheral surface of the through-hole H.

Description

  The present invention relates to a construction structure for renewed piping for renewing an existing water supply pipe or drain pipe provided through a floor slab of a building to a new piping material, and a piping material for floor slab penetration used in the construction structure for renewal piping. .

When building a new building, when piping through floors and walls, which are fire prevention compartments, when building concrete is placed, a sleeve (a hole through which the pipe penetrates, hereinafter referred to as a “through hole”) In general, after the pipe is passed through the through hole, 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 piping, a method as shown in FIG. 14 described below and a method as shown in FIG. 15 (see Patent Document 1) have been conventionally used.

[Method of FIG. 14]
(1) As shown in FIG. 14A, the existing piping 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. 14B, the remaining portion P1 of the existing piping remaining in the state supported by the floor slab S is suspended around the remaining portion P1 of the existing piping of the floor slab S by a rock drill or the like. Remove by picking using machine 100.
(3) As shown in FIG.14 (c), new piping material P2 was inserted in the through-hole H1 of the floor slab S produced by removing the remaining part P1 of existing piping, and a part of floor slab S around it. After that, the gap between the through hole H1 and the piping material P2 is filled with mortar (not shown).

[Method of FIG. 15]
(1) As shown in FIG. 15 (a), the existing piping 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. 15B, the remaining portion P1 of the existing piping remaining in the state supported by the floor slab S is cut around the remaining portion P1 of the existing piping of the floor slab S by a cutting machine 200 such as a core drill. Are removed together with a part of the floor slab S around the remaining portion P1 of the existing pipe.
(3) As shown in FIG. 15C, after inserting a new piping material P2 into the through-hole H1 of the floor slab S generated by removing the remaining portion P1 of the existing piping, the through-hole H1 and the piping material P2 A mortar (not shown) is filled in the gap.

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. 16 and 17 has been proposed. That is, in this method, as shown in FIGS. 16B and 17, the remaining portion P1 of the existing piping of the floor slab S is pulled upward using a hydraulic tool 300 arranged on the floor slab S. Yes.
If this extraction method is used, compared to the above two methods, generation of noise, vibration, and dust can be extremely reduced when the remaining portion P1 of the existing pipe is removed.

In addition, the joints that make up the existing piping are cut along the top and bottom surfaces of the floor slab at the top and bottom of the floor slab to remove rust and sludge in the remaining portion of the existing piping remaining in the portion that penetrates the floor slab. After that, an update method has also been proposed in which a pipe joint having a straight pipe portion smaller in diameter than the remaining portion inner diameter of the existing pipe is attached in a state where the straight pipe portion is inserted into the remaining portion of the existing pipe (patent) Reference 2).
In this method, only the joint portion of the existing pipe is cut off above and below the floor slab, so that a drawing step is not necessary, and noise, vibration, and dust can be reduced.

Japanese Unexamined Patent Publication No. 2006-200656 Japanese Patent No. 4371508

However, as described above, the remaining portion of the existing piping is pulled out, and a method of inserting the pipe or pipe joint constituting the renewal piping into the through hole penetrating the floor slab generated by this pulling, or the remaining portion of the existing piping is used. In the case of the method of Patent Document 2, the outer diameter of the insertion portion into the through hole or the remaining portion of the existing piping of the renewed piping material is slightly smaller than the inner diameter of the remaining portion of the through hole or the existing piping. There is a need. That is, if they have the same outer diameter, it is difficult to insert the through hole or the remaining portion of the existing pipe.
Therefore, as it is, a gap is generated between the through hole or the remaining portion of the existing pipe and the pipe material, and this gap causes a problem in terms of fire resistance. On the other hand, if the pipe material is made of metal, fire resistance can be ensured by filling the gap between the insertion part and the through hole or the remaining part of the existing pipe, but the gap is very small. Therefore, it is difficult to fill well.

  In view of the above circumstances, the present invention reduces the generation of noise, vibration, and dust during construction when replacing existing pipes that penetrate the floor slab with new pipes, and easily provides fire prevention of the floor slab penetration part. It aims at providing the construction structure of the renewed piping which can be ensured, and the piping material for floor slab penetration used for this construction structure.

  In order to achieve the above object, the construction structure of the renewal pipe according to the present invention (hereinafter referred to as “the construction structure of the present invention”) is such that the existing pipe penetrating the floor slab of the building is cut above and below the floor slab. The floor slab penetration part of the renewed pipe is passed through the remaining part of the existing pipe that is fixed to the floor slab or through the through hole formed in the floor slab by pulling out the existing pipe from the floor slab. The construction structure of the renewed pipe that penetrates the floor slab, wherein the renewed pipe is formed in at least part of the floor slab penetrating portion, the remaining portion of the existing pipe, or the smoke above and below the floor slab through the through hole. A sheet-like or tape-like refractory material for preventing distribution is wound.

In addition, the construction structure of the present invention is not particularly limited, but the sheet-like or tape-like refractory material penetrates the floor slab in a state where a part of the existing pipe protrudes upward or downward from the through hole. It is preferable that it is wound around the part.
That is, it can be easily confirmed whether or not a sheet-like or tape-like refractory material is wound.

In the present invention, the material of the piping material is not particularly limited, and examples thereof include metals such as steel and stainless steel, resins such as vinyl chloride resin and polyethylene, and those made of resin are preferable in consideration of workability.
As fireproof material, it is in the form of a sheet or tape, and when inserted into the remaining part or through hole of the existing pipe, it can be smoothly inserted into the remaining part or through hole of the existing pipe, and after insertion, the building code Prevents fire smoke generated from a fire on one floor across the floor slab from flowing into another floor through the remaining part of existing piping or through holes for more than the time stipulated by law If it can do, it will not be specifically limited.

For example, when the piping material constituting the floor slab penetration is a metal pipe, it may be a non-combustible material such as rock wool, but when the piping material is a resin pipe, the product name "Fibloc" manufactured by Sekisui Chemical Co., Ltd. Fire resistant and thermally expansible materials such as are preferred.
That is, the fire-resistant and heat-expandable material as described above starts to expand when exposed to a high temperature in the event of a fire, and fills the portion where the resin tube has burned and disappeared 5 to 20 times in the thickness direction.

  Therefore, when using a fire-resistant and heat-expandable material as a sheet-like or tape-like fire-resistant material, the winding thickness is such that the fire-resistant and heat-expandable material is thermally expanded by the heat at the time of the fire, and the smoke flows to other floors. As long as it can be prevented, there may be a state in which a slight gap is formed between the refractory and heat-expandable material and the remaining portion of the existing pipe or the through hole. That is, it is not necessary for the fire-resistant and thermally expandable material to be completely sandwiched between the floor slab penetrating portion and the remaining portion of the existing pipe or the through hole. As described above, the gap is preferably 3 mm or less in total in the radial direction when a material in which the fire-resistant and heat-expandable material is foamed 5 to 20 times is used.

The piping material used for the floor slab penetration part (hereinafter referred to as “floor slab penetration piping material”) is not particularly limited, but the fireproof material of the floor slab penetration part does not move when inserted. It is preferable that the outer diameter of the winding portion is smaller than the other part of the piping material for passing through the floor slab.
In addition, when the diameter of the refractory material winding part is smaller than other parts, if the renewed pipe is for water supply, the pressure inside the pipe will be high, so the refractory material winding part should have a thickness that can withstand the pressure inside the pipe. It is necessary to secure. Therefore, when processing existing piping material to obtain a piping material for floor slab penetration for water supply, a portion of the existing synthetic resin pipe or joint is drawn to make the meat of the refractory material winding part. It is preferable that the thickness is substantially the same as that of other portions. On the other hand, if the renewal pipe is for drainage, there is almost no pressure inside the pipe as it is for water supply, so it is not necessary to increase the wall thickness so much, but it is necessary to secure a sufficient inner diameter so that the drainage flows smoothly. There is. Therefore, when an existing piping material is processed to obtain a piping material for passing through a floor slab for drainage, it is preferable to cut a part of an existing synthetic resin pipe or joint.

In the construction structure of the present invention, the floor slab penetrating piping material is provided with a large-diameter portion that expands in a step shape above the floor slab penetrating portion, and the lower surface of the large-diameter portion is interposed via a sealing material. It is good also as a structure received on the circumference | surroundings of the residual part of an existing piping, or a through-hole.
Furthermore, when the renewal pipe is for drainage, it is formed with a one-size-down diameter of the standard dimension of the existing pipe, and the vertical pipe portions of the pipe material for passing through the floor slab are formed of pipes with inner spiral ribs. It is good also as a structure.

Moreover, it is good also as a structure by which the non-winding part of the sheet-like or tape-like refractory material of a floor slab penetration part, the remaining part of existing piping, or the said through-hole and the clearance gap are filled with the silicone resin type sealing agent.
That is, if the silicone resin-based sealing agent is filled as described above, the time until the thermally expandable sheet foams and closes the gap, the silicone resin-based sealing agent enters the upper floor of the fire floor heat, smoke, and gas. This can be prevented.
Examples of the silicone resin sealant include ordinary silicone sealants and modified silicone sealants.

  As described above, the construction structure of the present invention is the remaining part of the existing pipe that is fixed to the floor slab by cutting the existing pipe penetrating the floor slab of the building above and below the floor slab, or The construction structure of the update pipe that allows the floor slab penetration part of the update pipe to pass through the floor slab through the through-hole generated in the floor slab by pulling out the existing pipe from the floor slab, Since at least a part of the floor slab penetrating portion is wound with a remaining portion of the existing pipe or a sheet-like or tape-like refractory material for preventing smoke distribution above and below the floor slab through the through-hole, When the existing pipe penetrating the slab is replaced with a new pipe, the generation of noise, vibration, and dust is reduced during construction, and the fireproof property of the floor slab penetrating portion can be easily secured.

It is 1st Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is a perspective view showing the piping material for floor slab penetration used for the construction structure of FIG. It is a figure which illustrates typically the manufacturing process of the piping material for floor slab penetration of FIG. It is 2nd Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is a figure explaining the construction method of the construction structure of FIG. It is 3rd Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is 4th Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is 5th Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is a figure explaining the construction method of the construction structure of FIG. It is 6th Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is 7th Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is 8th Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. It is 9th Embodiment of the construction structure of this invention, Comprising: The floor slab part is represented with the cross section. 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. It is a figure which shows one process of the construction method of the conventional new piping. It is a figure which shows the next process of FIG. FIG. 20 is a diagram showing a step subsequent to FIG. 19. It is a figure which shows the next process of FIG. FIG. 22 is a diagram showing a step subsequent to FIG. 21. FIG. 23 is a diagram showing a step subsequent to that in FIG. 22. It is a figure explaining the problem of the construction method of the conventional new piping.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
FIG. 1 is a first embodiment of a construction structure according to the present invention, and shows a construction structure of an update pipe for water supply.

As shown in FIG. 1, this construction structure 1a is used so that the piping material 2a for floor slab penetration may constitute a part of the renewal piping.
That is, as shown in FIG. 2, the floor slab penetrating piping material 2 a has a straight tubular shape, and includes a constricted portion 21 as a floor slab penetrating portion and a refractory material winding portion in an intermediate portion. The fire-resistant and heat-expandable material 3 such as Sekisui Chemical Fibro is wound around the portion of the floor slab S in the construction state as a fire-resistant material.
Then, as shown in FIG. 3, this floor slab penetrating piping material 2a is formed by sandwiching a part of a vinyl chloride resin pipe P3 having the same diameter as that of an existing cast iron pipe from both sides with a mold 4 and then pressing and compressing it. After forming the constricted part 21 by making it diameter, as shown in FIG. 2, it manufactures by winding the fire-resistant heat-expandable material 3 around the constricted part 21.

The constricted portion 21 has a straight tubular shape having a diameter smaller than the inner diameter of the through-hole H formed when an existing pipe (not shown) of the floor slab S is pulled out, and the axial length thereof is the floor slab S. It is almost the same as the thickness or slightly longer.
Further, as described above, the constricted portion 21 is formed by sandwiching a part of the existing vinyl chloride resin tube P3 with a mold and reducing the diameter, so that the wall thickness of the tube wall is substantially the same as that of the other portions. It is the same.

And this construction structure 1a is constructed as follows.
That is, first, as shown in FIG. 15 (a), the existing pipe P is cut at the top and bottom of the floor slab S, and the portion between the upper and lower floor slabs S is removed, and then as shown in FIG. 15 (b). Then, the remaining portion P1 of the existing pipe held by the floor slab S is pulled out using the hydraulic tool 300 disposed on the floor slab S.

Next, the piping material 2a for passing through the floor slab is inserted into the through hole H until the refractory and thermally expandable material 3 reaches the lower end of the through hole H of the floor slab S.
Thereafter, although not shown above and below the floor slab penetrating piping material 2a, a vinyl chloride resin pipe serving as a standing pipe is bonded and fixed through a joint such as a socket.

This construction structure 1a is in a state in which the fire-resistant and heat-expandable material 3 is sandwiched between the constricted portion 21 and the inner wall surface of the through-hole H, so that a fire can occur on any floor across the floor slab S. Even if it occurs, there is no immediate burning on the other floor. That is, when a fire occurs, the fire-resistant and heat-expandable material 3 expands, and the constricted portion 21 softened by heat is closed. In addition, the fireproof performance of the fireproof and thermally expandable material 3 is added, and it is possible to prevent the incineration and the inflow of smoke to other floors for a long period of time.
Further, since the piping material 2a for penetrating the floor slab can be obtained only by processing the existing vinyl chloride resin pipe, it can be constructed without much construction cost. Moreover, the work of filling the mortar into the gap later becomes unnecessary and the workability is excellent.
Further, since the portion embedded in the floor slab S of the existing piping is not removed by cutting or cutting the floor slab S, generation of noise, vibration and dust during construction is small.

  FIG. 4 is a second embodiment of the construction structure of the present invention, and shows the construction structure of the renewal pipe for water supply.

As shown in FIGS. 4 and 5, the construction structure 1 b is used so that the floor slab penetrating piping material 2 b constitutes a part of the renewal piping.
That is, the piping material 2b for floor slab penetration is formed of vinyl chloride resin, and includes a straight pipe portion 22a as a floor slab penetration portion and a refractory material winding portion, and a receiving port 22b as a large diameter portion. Yes.

The straight pipe portion 22a has a straight pipe slightly smaller in diameter than the inner diameter of the through hole H formed when an existing pipe (not shown) of the floor slab S is pulled out, and its axial length is the floor. The slab S is longer than the thickness.
Further, a fire-resistant and heat-expandable material 3 such as Sekisui Chemical Co., Ltd. Fiblock is wound around the straight pipe portion 22a as a fire-resistant material in a portion that fits in the floor slab S in a construction state.

  The receiving port 22b is provided so as to expand in a step shape from the upper end of the straight pipe portion 22a, and the lower end of the piping material P4 constituting the standing pipe is fitted therein.

And this construction structure 1b is constructed as follows.
That is, first, as shown in FIG. 5, the through hole H is formed in the same manner as the construction structure 1a.

Next, as shown in FIG. 4, a sealing agent 5 such as a putty-like resin, for example, a silicone sealer, is placed from the through hole H so as to surround the through hole H at a position where the lower end surface of the receiving port 22 b of the floor slab S faces. After coating in a substantially circular shape so as to draw a large diameter, the straight pipe portion 22a of the piping material 2b for passing through the floor slab is inserted into the through hole H from above the through hole H, and the lower end surface of the receiving port 22b is placed on the floor slab. It is received around the through hole H of S.
That is, the refractory and heat-expandable material 3 is sandwiched over the entire circumference between the outer peripheral surface of the straight pipe portion 22a and the inner peripheral surface of the through hole H, and the lower end surface of the receiving port 22b and the through hole H of the floor slab S are formed. The periphery is sealed with the sealant 5.

  Then, the lower end portion of the vinyl chloride resin pipe P4, which is a water supply stand pipe on the upper floor of the floor slab S, is fitted and bonded to the receiving port 22b, and a portion protruding downward from the lower surface of the floor slab S of the straight pipe portion 22a is provided. It inserts in the upper end part of the vinyl chloride resin pipe P4 used as the water supply standing pipe of the floor below the floor slab S, and adheres.

  According to the construction structure 1b, the fire-resistant and heat-expandable material 3 is sandwiched between the straight pipe portion 22a and the inner wall surface of the through hole H. Even if a fire breaks out, there is no immediate burning on the other floor. That is, when a fire occurs, the fire-resistant and heat-expandable material 3 expands to close the straight pipe portion 22a softened by heat. In addition, the fireproof performance of the fireproof and thermally expandable material 3 is added, and it is possible to prevent the incineration and the inflow of smoke to other floors for a long period of time.

  Further, the upper end of the straight pipe portion 22a is provided with a receiving port 22b having a diameter larger than that of the through hole H expanding in a stepped manner, and the lower end surface of the receiving port 22b and the upper surface of the floor slab S around the through hole H Since the gap is sealed with the sealing agent 5, even if a gap is generated between the fire resistant and thermally expansible material 3 and the inner peripheral surface of the through hole H or the straight pipe portion 22a, it is possible to prevent similar firing. High fire resistance.

Furthermore, since the straight pipe portion 22a is inserted into the through-hole H in a state where the refractory and heat-expandable material 3 is wound around the straight pipe portion 22a in advance, the workability is improved as compared with filling mortar later. Is excellent.
Further, since the sealing agent 5 is applied on the floor slab S that is substantially horizontal, the sealing agent 5 does not sag and the application of the sealing agent 5 is easy.
Further, since the portion embedded in the floor slab S of the existing piping is not removed by cutting or cutting the floor slab S, generation of noise, vibration and dust during construction is small.

FIG. 6 shows a third embodiment of the construction structure of the present invention.
As shown in FIG. 6, this construction structure 1c is a construction structure for water supply renewal piping, and is used so that the floor slab penetration piping material 2c forms part of the renewal piping.

That is, the floor slab penetrating piping material 2c is an electrofusion joint made of polyethylene resin, having a receiving port 23a as a large-diameter portion at one end, and having a differential port 23b at the other end, A constricted portion 23c as a floor slab penetrating portion and a refractory material winding portion is provided between the outlet 23b.
The receiving port has an outer diameter larger than that of the through hole H, is reduced in a step shape at a boundary portion with the constricted portion 23c, and is embedded with a heater wire 23e connected to the terminal 23d.

The outlet 23b has an outer diameter on the side of the constricted portion 23c that is substantially the same as or slightly larger than the inner diameter of the through hole H, and gradually decreases toward the tip, so that the outer diameter of the tip is slightly smaller than the inner diameter of the through hole H. It has become.
The outer diameter of the constricted portion 23c is smaller than the inner diameter of the through-hole H by the winding thickness of the refractory and heat-expandable material 3, and the wall thickness of the pipe wall can withstand the water pressure flowing through the pipe. It is secured.

And this construction structure 1c is constructed as follows.
That is, first, the through hole H is formed in the same manner as in the construction structures 1a and 1b.
Similarly to the construction structure 1b, the sealing agent 5 is applied in a substantially circular shape so as to draw a larger diameter than the through hole H so as to surround the through hole H at a position where the lower end surface of the receiving port 22b of the floor slab S faces. .
Next, the piping material 2c for passing through the floor slab is inserted into the through hole H from above the floor slab S until the lower end surface of the receiving port 23a is received around the through hole H of the floor slab S with the opening 23b at the top. The

And the lower end of the polyethylene piping material P5 on the floor above the floor slab S is inserted into the receiving port 23a, and is electrically fused.
The plug 23b is inserted into one end of the socket-type electrofusion joint 6 and electrofused, and the other end of the electrofusion joint 6 is inserted into the upper end of the polyethylene piping material P5 on the floor below the floor slab S. Electrofuse with.

  This construction structure 1c is as described above, and has the same effects as the construction structure 1b. Since the pipe materials are fused together, the connection strength between the pipe materials and the connection accuracy are high.

FIG. 7 shows a fourth embodiment of the construction structure of the present invention.
As shown in FIG. 7, this construction structure 1 d is a construction structure for water supply renewal piping, and is used so that a floor slab penetration piping material 2 d made of vinyl chloride resin constitutes a part of the renewal piping. .

That is, the floor slab penetrating piping material 2d has an opening 24a at both ends, and a constricted portion 24b as a floor slab penetrating portion and a refractory material winding portion is provided between the opening 24a and the opening 24a. Yes.
The outlet 24a has an outer diameter on the side of the constricted portion 24b that is substantially the same as or slightly larger than the inner diameter of the through hole H, and gradually decreases toward the tip, so that the outer diameter of the tip is slightly smaller than the inner diameter of the through hole H. It has become.

  The outer diameter of the constricted portion 24b is smaller than the inner diameter of the through-hole H by the winding thickness of the refractory and heat-expandable material 3, and the wall thickness of the tube wall can withstand the water pressure flowing through the pipe. It is secured.

And this construction structure 1d is constructed as follows.
That is, first, the through hole H is formed in the same manner as in the construction structures 1a to 1c.
Next, the piping material 2d for penetrating the floor slab is so arranged that the difference ports 24a on both sides protrude from the opening ends of the through holes H, and the refractory and heat-expandable material 3 is arranged at the lower end of the through hole H of the floor slab S. Then, it is inserted into the through hole H.
Then, a vinyl chloride resin pipe (not shown) serving as a standing pipe is connected to the upper and lower outlets 24a through the socket 7.

  Since the construction structure 1d is as described above, the construction structure 1d has the same effect as the construction structure 1a.

FIG. 8 shows a fifth embodiment of the construction structure of the present invention.
As shown in FIG. 8, this construction structure 1e is a construction structure for drainage renewal piping, and is used so that a cast iron floor slab penetration piping material 2e forms part of the renewal piping.

That is, the floor slab penetrating piping member 2e includes a floor slab penetrating portion and a stand pipe portion 25a as a refractory material winding portion, a branch pipe connecting portion 25b, and a receiving port 25c.
The vertical pipe portion 25a has a nominal diameter that is one size down of the existing pipe. That is, if the existing pipe is 100A, the size reduction is 80A.
And in this construction structure 1e, the standing pipe portion 25a is inserted into the remaining portion P1 of the existing pipe in a state where the fire-resistant and heat-expandable material 3 is wound around the lower end portion thereof, and the fire-resistant and thermally expandable material 3 is At the lower end portion of the remaining portion P1 of the existing pipe, the vertical pipe portion 25a is sandwiched between the inner wall surface of the remaining portion P1 of the existing pipe.

This construction structure 1e is constructed as follows.
First, as shown in FIG. 9, the existing piping is cut at the top and bottom of the floor slab S to remove sludge and the like inside the remaining portion P1 of the existing piping remaining on the floor slab S, and the floor slab penetration piping material 2e. The fire-resistant and heat-expandable material 3 is wound around a predetermined position of the vertical pipe portion 25a. The refractory and heat-expandable material 3 is wound to a thickness such that its outer diameter is substantially the same as or slightly larger than the inner diameter of the remaining portion P1 of the existing pipe.

Next, as shown in FIG. 9, the standing pipe portion 25a is inserted into the remaining portion P1 of the existing piping from above the floor slab S, and as shown in FIG. 8, the lower end portion of the refractory heat-expandable material 3 is already provided. It is exposed from the lower end of the remaining portion P1 of the pipe to the lower floor of the floor slab S, and the upper end portion of the refractory heat-expandable material 3 is sandwiched between the vertical pipe portion 25a and the inner wall surface of the remaining portion P1 of the existing pipe. Thus, the piping material 2e for floor slab penetration is set.
If necessary, after filling the gap between the vertical pipe portion 25a and the remaining portion P1 of the existing piping at the upper end of the remaining portion P1 of the existing piping with the sealing agent 5, the drainage piping material P6 above and below the floor slab S Connecting. In addition, as the piping material P6 for drainage, it is preferable to use a pipe having high drainage performance and a spiral rib or spiral groove on the inner surface.
Further, a branch pipe (not shown) is connected to the branch pipe connecting portion 25b.

  The construction structure 1e has the same effect as the construction structures 1a and 1d, and can be constructed with the remaining portion P1 of the existing piping remaining on the floor slab S, that is, the existing piping remains. Since the operation of pulling out the existing piping such as the portion P1 from the floor slab S is not required, the workability is further improved, and noise, vibration, and dust can be reduced during construction.

FIG. 10 shows a sixth embodiment of the construction structure of the present invention.
As shown in FIG. 10, the construction structure 1f is a construction structure for drainage renewal piping, and is used so that the floor slab penetration piping material 2f constitutes a part of the renewal piping.
That is, as shown in FIG. 10, the floor slab penetrating piping member 2f includes a floor slab penetrating portion provided by cutting an existing vinyl chloride resin pipe from the outer peripheral direction and a constricted portion as a refractory material winding portion. It has a straight pipe shape with 26a in the middle. That is, the floor slab penetrating piping material 2f has the same inner diameter both at the top and bottom of the constricted portion 26a, and only the constricted portion 26a is thin.

Further, the floor slab penetrating piping material 2f has the fire-resistant and heat-expandable material 3 wound around the constricted portion 26a as a refractory material in a portion that fits into the floor slab S.
The fireproof and thermally expansible material 3 is wound so that the outer diameter thereof is substantially the same as or slightly larger than the inner diameter of a through-hole H described later.

And this construction structure 1f is constructed as follows.
That is, first, the through hole H is formed in the same manner as the construction structures 1a to 1d.

Next, the floor slab penetrating piping material 2f is inserted into the through hole H so that the refractory and thermally expandable material 3 reaches the lower end of the through hole H of the floor slab S.
Thereafter, although not shown above and below the floor slab penetrating piping material 2f, a vinyl chloride resin pipe serving as a standing pipe is bonded and fixed through a joint such as a socket.

Since this construction structure 1f is in a state in which the fire-resistant and heat-expandable material 3 is sandwiched between the constricted portion 26a and the inner wall surface of the through hole H, a fire can be caused on any floor across the floor slab S. Even if it occurs, there is no immediate burning on the other floor. That is, when a fire occurs, the fire-resistant and heat-expandable material 3 expands to close the constricted portion 26a softened by heat. In addition, the fireproof performance of the fireproof and thermally expansible material 3 is added, so that it is possible to prevent the incineration and the inflow of smoke to other floors for a long time.
Moreover, since the floor slab penetrating piping material 2f can be obtained only by cutting an existing vinyl chloride resin pipe, it can be constructed without much construction cost. Moreover, the work of filling the mortar into the gap later becomes unnecessary and the workability is excellent.

FIG. 11 shows a seventh embodiment of the construction structure of the present invention.
As shown in FIG. 11, the construction structure 1g is a construction structure for drainage renewal piping, and is used so that the floor slab penetration piping material 2g constitutes a part of the renewal piping.

  As shown in FIG. 11, the floor slab penetrating piping member 2g includes a floor slab penetrating portion provided by cutting an existing vinyl chloride resin pipe from the outer peripheral direction and a small diameter portion 27a as a refractory material winding portion. It has a straight pipe shape at one end. That is, the floor slab penetrating piping material 2g has the same inner diameter in the small diameter portion 27a and other portions, and only the small diameter portion 27a is thin.

  Moreover, the piping material 2g for floor slab penetration has the fire-resistant and heat-expandable material 3 wound around the small-diameter portion 27a as a fire-resistant material.

And this construction structure 1g is constructed as follows.
That is, first, the through hole H is formed in the same manner as the construction structures 1a to 1d.
The fire-resistant and heat-expandable material 3 is wound around the small-diameter portion 27a so that the outer diameter thereof is substantially the same as or slightly larger than the inner diameter of the through hole H.

Next, the floor slab penetrating piping material 2g is inserted into the through hole H until the refractory and thermally expandable material 3 reaches the lower end of the through hole H of the floor slab S.
Thereafter, the different diameter socket 9 is bonded and fixed to the lower end of the small diameter portion 27a of the piping material 2g for passing through the floor slab under the floor slab S, and then the lower floor of the floor slab S is placed below the floor slab S. The upper end of the vertical pipe P7 is bonded and fixed.

This construction structure 1g is in a state where the fire-resistant and heat-expandable material 3 is sandwiched between the small-diameter portion 27a and the inner wall surface of the through hole H. Even if it occurs, there is no immediate burning on the other floor. That is, when a fire occurs, the fire-resistant and heat-expandable material 3 expands, and the small-diameter portion 27a softened by heat is closed. In addition, the fireproof performance of the fireproof and thermally expansible material 3 is added, so that it is possible to prevent the incineration and the inflow of smoke to other floors for a long time.
Moreover, since 2 g of piping materials for floor slab penetration can be obtained only by cutting an existing vinyl chloride resin pipe, it can be constructed without much construction cost. Moreover, the work of filling the mortar into the gap later becomes unnecessary and the workability is excellent.

FIG. 12 shows an eighth embodiment of the construction structure of the present invention.
As shown in FIG. 12, this construction structure 1h is a construction structure for renewal piping for drainage, and the piping material 2e for floor slab penetration made of cast iron similar to the construction structure 1e constitutes a part of the renewal piping. Used to do.

  And in this construction structure 1h, after the standing pipe portion 25a is inserted into the remaining portion P1 of the existing pipe in a normal state where the fire-resistant and heat-expandable material 3 is not wound, the fire-resistant and thermally expandable material 3 is inserted into the existing pipe. Except that the portion of the remaining portion P1 projecting downward from the lower surface of the floor slab S and the portion of the standing pipe portion 25a projecting downward from the lower end of the remaining portion P1 of the existing pipe are wound. It is the same as the construction structure 1e.

  In this construction structure 1h, as described above, the fire-resistant and heat-expandable material 3 protrudes downward from the lower surface of the floor slab S of the remaining portion P1 of the existing piping, and the remaining portion P1 of the existing piping of the standing pipe portion 25a. It is wound so as to straddle the portion projecting downward from the lower end of the tube, and the lower end of the gap between the remaining portion P1 of the existing piping and the standing tube portion 25a is sealed by the refractory and heat-expandable material 3. Therefore, even if a fire occurs on one floor with the floor slab S in between, it will not be immediately fired on the other floor.

Moreover, when a fire breaks out, the fire-resistant and heat-expandable material 3 expands and closes the gap between the remaining portion P1 of the existing pipe and the standing pipe portion 25a, and the fire-resistant performance of the fire-resistant and thermally expandable material 3 is added. Thus, it is possible to prevent the incineration of smoke and the inflow of smoke to other floors for a long time.
In addition, since the construction structure 1h is configured to wind the fire-resistant and heat-expandable material 3 after inserting the standing pipe portion 25a into the remaining portion P1 of the existing piping, the remaining portion P1 of the existing piping, Even if the dimension of the gap with the vertical pipe portion 25a is not uniform in the circumferential direction, it can be easily constructed.

FIG. 13 shows a ninth embodiment of the construction structure of the present invention.
As shown in FIG. 13, this construction structure 1i has a non-winding structure in which the fire-resistant and heat-expandable material 3 in the floor slab penetration portion of the synthetic resin pipe P7 such as a polyvinyl chloride pipe or polyethylene pipe for renewal is not wound. The silicone sealant 50 is filled from above into an annular gap R formed between the synthetic resin pipe P7 and the through hole H.
The synthetic resin pipe P8 is supported on the floor slab S by a support fitting F made of an angle or the like fixed to the upper surface of the floor slab S.

Since the construction structure 1i is filled with the silicone sealant 50 in the gap between the non-winding portion and the through-hole H as described above, the silicone resin-based sealing agent is used for other times until foaming and closing the gap. It is possible to prevent the heat, smoke and gas of the floor from entering the upper floor or the lower floor.
Moreover, since the synthetic resin pipe P7 is supported by the floor slab S by the support fitting F, the position of the refractory and thermally expansible material 3 and the silicone sealant 50 are displaced due to thermal expansion and contraction of the synthetic resin pipe P7 after construction, It is possible to prevent a gap from being generated due to this shift.

  The support bracket F may be provided on the lower surface side of the floor slab S. However, since the work of providing the support bracket F on the lower surface side is a work at a high place, considering the safety of the work, It is preferable to provide on the upper surface side of the floor slab S.

  Moreover, in the standing pipe structure for water supply or drainage of a newly constructed multi-layer building, the construction structure shown in FIG.

That is, if it demonstrates using FIGS. 18-23, the construction method of the vertical pipe for the water supply or drainage of the conventional new multilayered building will be as follows.
(1) As shown in FIG. 18, the formwork 100 is arranged in the floor slab forming portion of each floor, the reinforcing bar 110 is arranged thereon, and the piping material P8 for the standing pipe is provided in the portion corresponding to the floor slab penetration portion of the standing pipe. A void tube 120 having a diameter of about 2 sizes larger than the outer diameter is arranged.
(2) Concrete having the thickness of the floor slab S is poured onto the mold 100 to form the floor slab S as shown in FIG.
(3) After the concrete is hardened, the mold 100 and the void tube 120 are removed as shown in FIG.
(4) As shown in FIG. 21, in the through-hole H2 in the state which wound the fire-resistant thermally expansible material 3 to the lower side of the floor slab penetration part of the piping material P8, and the lower side of the floor slab penetration part to a little lower side. The floor slab penetration part of piping material P8 is inserted.
(5) As shown in FIG. 22, the lower end of the through hole H is closed from below the floor slab using a sealing material 140 such as an adhesive sheet or thin plywood.
(6) As shown in FIG. 23, mortar M is poured from above the floor slab S, and the floor slab penetration part of the piping material P8 is fixed to the floor slab S by the hardened mortar M.

However, in the above-described conventional new pipe construction method, when the floor slab penetrating portion of the piping material P8 is fixed to the floor slab S, the mortar M is used as described above. It is made by mixing cement and sand and adding water. The specific gravity is about 1.8. In addition, since it is necessary for the worker to carry the mortar M in a bucket by the required amount to each place of use, it is heavy labor to carry it. In addition, the surplus mortar M must be disposed of as industrial waste after curing, which increases disposal costs and burdens the environment.
Further, as described above, since the mortar M, which is a fluid containing water, is poured, the sealing material 140 penetrates the mortar M tightly and tightly so that it can withstand the mortar load and the load at the time of tamping. It is necessary to close the lower end of the hole H, and a great deal of labor is required. In addition, the work of attaching the sealing material 140 is a work at a high place, which is dangerous.
Furthermore, when pouring the mortar M, as shown in FIG. 24, the centering of the through hole H and the piping material P8 is misaligned.

  On the other hand, also in the piping construction of a newly built multi-layer building, a void pipe having an outer diameter larger than the outer diameter of the piping material P8 by almost the thickness of the fire-resistant and heat-expandable material 3 wound around the floor slab penetration portion of the piping material P8. If a through hole H having a smaller inner diameter is formed by using 120 and the construction structure is as shown in FIG. 13, the mortar M filling operation can be eliminated, and the through hole H and the piping material P8 can be eliminated. Can be easily centered. That is, the problem at the time of piping construction of the conventional new multi-layer building can be solved.

The present invention is not limited to the above embodiment. For example, in the second and third embodiments, the receiving port is provided as the large diameter portion, but a flange may be provided instead of the receiving port.
In the fifth embodiment, there is one horizontal branch pipe connecting portion, but two or more may be provided.
In the fifth embodiment, the renewal joint is made of cast iron, but may be made of a synthetic resin such as a vinyl chloride resin.

1a-1i Construction structure 2a-2g Floor slab penetration piping materials 21, 23c, 24b, 26a Constricted part (floor slab penetration part and refractory material winding part)
22a Straight pipe part 22b, 23a Receptacle (large diameter part)
25a Stand pipe part (floor slab penetration part)
27a Small diameter part (floor slab penetration part and fireproof material winding part)
3 Fire-resistant and heat-expandable materials (fire-resistant materials)
S Floor slab H Through hole P1 Remaining part of existing piping

Claims (11)

The existing piping penetrating the floor slab of the building is cut at the top and bottom of the floor slab so that the remaining portion of the existing piping that remains fixed to the floor slab, or by pulling the existing piping from the floor slab The construction structure of the renewal pipe that allows the floor slab penetration part of the renewal pipe to penetrate the floor slab through the through hole generated in the floor slab,
In the renewed pipe, at least a part of the floor slab penetration part is wound with a remaining part of the existing pipe or a sheet-like or tape-like fireproof material for preventing smoke flow above and below the floor slab through the through hole. Construction structure of renewed piping, characterized by   The update according to claim 1, wherein the sheet-like or tape-like refractory material is wound around a floor slab penetrating portion in a state where a part of the existing piping or a part of the existing pipe protrudes upward or downward from the through hole. Piping construction structure.   The construction structure of the renewal piping according to claim 1 or 2, wherein the refractory material is a refractory and thermally expandable material.   The silicone resin-based sealing agent is filled in the non-winding portion of the sheet-like or tape-like refractory material of the floor slab penetrating portion and the remaining portion of the existing pipe or the gap between the through-hole and the gap. Construction structure of the renewed piping as described.   The construction structure of the renewal piping according to any one of claims 1 to 4, wherein an outer diameter of the fire-resistant material winding portion of the floor slab penetration portion is smaller than that of the other portion of the piping material for penetration of the floor slab.   The renewal pipe is for water supply, and the fireproof material winding part of the pipe material for passing through the floor slab is formed by drawing a part of an existing synthetic resin pipe or joint. Renewed piping construction structure.   The renewal pipe is for drainage, and the fireproof material winding part of the pipe material for floor slab penetration is formed by cutting a part of an existing synthetic resin pipe or joint. Renewed piping construction structure.   The piping material for passing through the floor slab has a large-diameter portion that expands stepwise above the floor-slab penetrating portion, and the lower surface of the large-diameter portion is received around the remainder of the piping or the through hole via the sealing material. The construction structure of the renewal piping according to any one of claims 1 to 7.   The renewal pipe is for drainage, is formed to have a one-size down diameter of the standard dimension of the existing pipe, and the upper and lower vertical pipe portions of the pipe material for passing through the floor slab are formed of pipes with internal spiral ribs. The construction structure of the update piping in any one of Claims 1-5, Claim 7, and Claim 8.   The piping material for floor slab penetration used for the construction structure of the renewal piping according to claim 6, wherein a part of an existing synthetic resin pipe or joint is drawn to form a refractory material winding part.   The piping material for floor slab penetration used for the construction structure of the renewal piping according to claim 7, wherein a part of an existing synthetic resin pipe or joint is cut to form a fire-resistant expansive material winding part.

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