JP4786310B2 - How to correct the drainage stack - Google Patents

Description

The present invention relates to a method for correcting a drainage stack disposed in a multi-layered building such as an apartment house or a building.

A multi-layered building such as an apartment house or a building is provided with a drainage standpipe for flowing wastewater discharged from each floor to a sewer. Such drainage stacks deteriorate with long-term use and cause corrosion, thinning, cracks, cracks, and the like. Accordingly, it is necessary to maintain the drainage stack at an appropriate time after completion. However, the drainage stack is usually provided through a concrete slab constituting the slab floor surface of each floor, and the penetrating portion is hardened with mortar or the like. Therefore, all existing drainage stacks cannot be replaced with new pipes unless the mortar part is crushed. Then, in order to prevent the aging of the existing piping and extend the use period of the drainage stack, a method of lining the inner surface of the piping with an epoxy resin after polishing and cleaning has been proposed (for example, Patent Documents 1 to 3). .

Patent Document 1 “Method for Correcting Drainage Vertical Pipe” is a method in which a liquid epoxy resin is sprayed onto the inner surface of a pipe, and as shown in FIG. 5, the drainage vertical pipe 51 is cut at two locations, the lower part and the upper part. A step of cleaning, a cleaning step of removing deposits on the inner wall of the tube after cutting, a drying step, a heated hose 54 inserted into the tube with adjustable movement speed, and moved at a required constant speed, and a paint spray nozzle at the tip 55, a process of forming a coating film by ejecting a quick-drying two-component epoxy resin paint from 55.

The “pipeline repairing method” in Patent Document 2 is a method of sticking an impermeable cylindrical sheet to the inner surface of a pipe, and as shown in FIGS. 6 (A) and 6 (B), at the end of the drain pipe 61. A second liner member 6 which is disposed facing the bent pipe 65 opened upward and has a water-impermeable inner surface layer portion formed in a cylindrical shape.
2 is supplied into the drain pipe 61 through the bent pipe 65, and the second liner member 62 is supplied.
The tip portion of the second liner member 62 is inserted into the drain pipe 61 in an inverted state, and a hydraulic pressure of a liquid such as water is applied between the inner surface layer portions of the inverted portion in the inverted state. The reverse portion is advanced to the back of the drain pipe 61.

Patent Document 3 “Tube Lining Method” uses an impervious cylindrical sheet as an epoxy resin-impregnated cloth sheet. As shown in FIGS. 7A and 7B, a plurality of elastic tubes 72 are provided. The elastic tube is formed into a cylindrical shape, and the outer peripheral surface of the elastic tube is covered with a resin absorbent material made of woven fabric or non-woven fabric to form a lining material 71. The resin absorbent material of the lining material is impregnated with a curable resin. However, the elastic tube 72 is drawn into the conduit 73 and injected with pressure fluid to expand the elastic tube 72. After the curable resin is cured, the elastic tube is pulled out.

In the method of Patent Document 1 described above, the epoxy resin is directly sprayed and applied to the inner surface of the pipe.
Although various ideas have been made, it is difficult to form a resin layer with a uniform thickness on the inner surface of the pipe, and in particular, when the pipe length is long, there is a problem that the formation of the resin layer cannot be fully confirmed and the reliability is lacking. .

Moreover, since the method of patent document 2, 3 sticks a cylindrical sheet | seat on the inner surface of piping, unlike the spray coating method, since the thickness of the sheet | seat which forms a film | membrane is constant, it has uniform thickness on the piping inner surface. It is possible to form a resin layer, which is excellent in terms of the surface, but there is a problem that it takes too much time to correct complicatedly arranged pipes such as laterally extending branch pipes connected to the drainage standpipe. It was.

Therefore, the present inventors have a trouble even when the length of the drainage stack arranged through the slabs of the plurality of floors is long or when the horizontal branch pipe is connected to the drainage stack. Developed a drainage stack correction method that can easily form a resin layer with a uniform thickness on the inner surface of all pipes including branch pipes in a short time, and proposed as Japanese Patent Application No. 2004-236909. Yes.

This method is a method of correcting a drainage stack disposed through a concrete slab that constitutes a floor surface of a plurality of floors,
Cutting the drainage stack between the floor to be corrected and the upper floor at a predetermined position from the slab floor surface of the current floor and at a predetermined position from the slab ceiling surface of the upper floor, and removing the connecting portion therebetween Process,
After the inner surface of the slab penetrating portion of the drainage stack remaining on the slab floor surface of the current floor and / or the slab ceiling surface of the upper floor is polished and washed, a penetrating portion correcting step for forming an epoxy resin film on the inner surface,
It is characterized by comprising a connecting portion correcting step of adding a new pipe to the portion removed in the cutting step.

According to this correction method, the inner surface of a part of the drainage stack (slab penetration part) left in the cutting process is polished and washed in the penetration part correction process, and an epoxy resin film is formed on the inner surface. The work can be completed in a short time compared to the conventional method of correcting the entire pipe. Moreover, since the pipe length of the drainage standpipe (slab penetration part) to remain is short, the confirmation test | inspection of the film | membrane formation state of an epoxy tree is easy.

In addition, by repeating the three steps of the cutting step, the penetrating portion correcting step, and the connecting portion correcting step sequentially or in parallel from an arbitrary floor, the correcting operation can be performed sequentially or in parallel from a convenient room.

By the way, in the drainage collecting pipe joint used in the slab penetrating portion of the drainage stack connecting the laterally drawn branch pipes, for example, a large amount of toilet drainage containing filth flows from the branch pipes at once.
The pipe may collide with the inner wall facing the connection port of the branch pipe and flow inside the pipe, and if it flows down in this blocked state, a pressure fluctuation will occur in the pipe, and if this pressure fluctuation is large, It is known to cause troubles such as breakage.

As a measure for avoiding such troubles, as proposed in Patent Document 4, it is very effective to provide a diversion guide for branching and draining the drainage water left and right on the inner surface facing the connection port of the branch pipe. .

Japanese Patent Application Laid-Open No. 5-31456, “Method for correcting drainage vertical pipe” JP-A-6-106622, “Pipeline repair method” JP 2002-160295 A, “Pipe lining method” JP-A-10-332066

The present invention has been made in consideration of the above points, and the object of the present invention is to make it easy and easy even when the length of a drainage stack disposed through each slab of a plurality of floors is long. A resin layer with a uniform thickness can be formed on the inner surface of all pipes including branch pipes in a short time, and even if toilet drainage etc. flows at once, pressure fluctuations in the pipe do not occur or are alleviated. The purpose of this is to propose a method for correcting the drainage stack that can prevent troubles such as trap breakage.

In order to achieve the above object, technical measures taken by the present invention are as follows. That is,
In invention of Claim 1, it is the correction method of the drainage stack arranged through the concrete slab which comprises the slab floor of a plurality of floors,
The drainage stack between the floor to be corrected and the upper floor was connected to the drainage collecting pipe joint and above and below it.
Cutting that cuts at a predetermined position from the slab floor surface of the current floor and at a predetermined position from the slab ceiling surface of the upper floor so that a part of the straight pipe remains as a slab penetration portion, and removes the connecting portion therebetween Process,
The inner surface of the slab penetration part of the drainage stack remaining on the slab floor of the current floor and / or the slab ceiling of the upper floor is polished and cleaned, and the inner surface facing the connection port of the branch pipe flows from the branch pipe. After installing the shunt guide that branches the drainage that is discharged from the upper floor and flows down the drainage stack inner pipe to the left and right above the position where the drainage collides, the epoxy resin film is applied to the inner surface of the slab penetration part A through-portion correcting step for forming the shunt guide in a covered state;
There is provided a method for correcting a drainage stand characterized by comprising a connecting portion correcting step of adding a new pipe to a portion removed in the cutting step.

The invention described in claim 2 is characterized in that the cutting step, the penetration portion correcting step, and the connecting portion correcting step are repeated sequentially or in parallel from an arbitrary floor.

According to the configuration of the first aspect of the present invention, the inner surface of a part of the drainage stack (slab penetrating portion) left in the cutting step is polished and cleaned in the penetrating portion correcting step, and is opposed to the connection port of the branch pipe. After attaching a diversion guide that branches the drainage that is discharged from the upper floor and flows down the inner surface of the drainage stack to the left and right above the position where the drainage that flows in from the branch pipe collides, Since the epoxy resin film is formed on the inner surface of the slab penetrating portion so that the shunt guide is covered, not only can the work be completed in a short time compared with the conventional method of correcting the entire drainage standpipe, but also the residual guide remains. Since the length of the drainage standpipe (slab penetrating portion) is short, it is easy to carry out the work of attaching the diversion guide, the check of the state of attachment of the diversion guide, and the check of the film formation state of the epoxy tree.

In addition, since the epoxy resin film is formed in a state where the shunt guide is covered after the shunt guide is installed, the position of the shunt guide is restricted by the epoxy resin film, and the mounting state of the shunt guide is determined by the epoxy resin film. Can be reinforced.

Therefore, even if the length of the drainage stack arranged through the slabs on the plurality of floors is long, the resin layer is easily and uniformly applied to the inner surface of all the pipes including the branch pipes in a short time. It is possible to form a drainage standpipe that is not equipped with a shunt guide. As a result, it is possible to alleviate troubles such as trap breakage. That is, it is an inner surface facing the connection port of the branch pipe, and the drainage discharged from the upper floor above the position where the drainage flowing in from the branch pipe collides is branched to the right and left. Since a shunt guide is provided to flow down, the merging of the drainage flowing down from above and the drainage discharged from the branch pipe is prevented, and drainage from the branch pipe can be discharged quickly, improving drainage performance. it can.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

FIG. 1 is a schematic diagram showing a method for correcting a drainage stack according to the present invention. The present invention is a method for correcting a drainage stack 10 disposed through concrete slabs 1 and 2 constituting slab floor surfaces 1a and 2a of a plurality of floors. As shown in this figure, the drainage stack correcting method of the present invention comprises a cutting step (A), a through portion correcting step (B), and a connecting portion correcting step (C).

In the cutting step (A), the drainage stack 10 between the current floor to be corrected and the upper floor thereof is placed at a predetermined position from the slab floor surface 1a of the current floor and a predetermined dimension H1 from the slab ceiling surface 2b of the upper floor. Surface 2
The straight pipe portion 13a of the existing drainage stack is cut away leaving a predetermined dimension H2 from b. On this occasion,
When a new straight pipe 13b is finally connected, a slight straight pipe portion is left to facilitate installation. Accordingly, the predetermined dimensions H1 and H2 are preferably about 25 to 50 cm.

In the through portion correction step (B), the inner surface of the slab penetration portion (a part of the drainage collecting pipe joint and a straight pipe connected to the top and bottom thereof) 11 of the drainage stack remaining on the slab floor surface 1a of the current floor is polished and cleaned. Then, as shown in FIGS. 2A and 2B, after removing rust and other slime 14 on the inner surface of the pipe, FIG.
As shown in (A) of FIG. 1, the inner surface of the branch pipe 15 that faces the connection port 15a,
A diversion guide 16a is attached above the position where the waste water flowing in from above collides, and the waste water that is discharged from the upper floor and flows down the inner surface of the drainage stack is branched left and right. Thereafter, as shown in FIG. 3B, an epoxy resin film 17 is formed on the inner surface of the slab penetrating portion 11 so as to be covered with the flow dividing guide 16a.

In this way, the inner surface of the branch pipe 15 that faces the connection port 15a, and is discharged from the upper floor above the position where the drained water that flows in from the branch pipe 15 collides, and flows down the inner surface of the drainage stack 10 Since the branch guide 16a for branching the drainage to the left and right to flow down is provided, the junction between the drainage flowing down from above and the drainage discharged from the branch pipe 15 is prevented, and the drainage from the branch pipe 15 is prevented. It can be discharged quickly and drainage performance can be improved.

In this case, since the lower floor of the predetermined floor is also rectified, even when the drainage stack on the lower floor is not cut, the portion corresponding to the substantially predetermined dimension H2 is polished and cleaned, the flow guide 16a is attached, and the epoxy resin The film 17 may be formed. If necessary, both the slab penetrating portions 11 and 12 on the current floor and the upper floor may be polished and cleaned in parallel to attach the flow dividing guide 16a and form the epoxy resin film 17. The inner surface of the slab penetrating portion 12 is polished and cleaned, and the flow guide 16
When a is attached and the epoxy resin film 17 is formed, the straight pipe portion of the upper drainage stack is cut off from the slab floor surface 2a while leaving the predetermined dimension H1 in the same manner as the processing of the slab penetration part 11. Become. The diversion guide 16a has a substantially triangular pyramid shape, and is arranged and attached so that one ridge line is directed in the vertical direction. The rear surface of the diversion guide 16a (attachment surface to the inner surface of the drainage stack) is aligned with the inner surface of the drainage stack. Is curved.

In the example shown in the figure, another diversion guide 16b is attached also directly above the connection port 15a (above the position where drainage flows from the branch pipe 15), and the drainage flowing down the drainage stack is disposed above the connection port 15a. Branching left and right, the inflow of drainage from the branch pipe 15 is devised so as to be performed smoothly without being obstructed by the drainage flowing down the drainage stack. That is, this diversion guide 16b
This prevents the collision of the drainage flowing down from the drainage stack and the drainage flowing in from the branch pipe 15,
Thereby, it is comprised so that the pressure in a pipe | tube may be suppressed. Similarly to the diversion guide 16a, the diversion guide 16b is attached after polishing and cleaning the inner surface, and then forms the epoxy resin film 17, so that it is covered and protected by the epoxy resin film 17.

In the connecting portion correcting step (C), a new pipe 13b is added to the portion removed in the cutting step.
That is, the new straight pipe 13b is connected to the slab penetration part 11 (and / or 12) after the formation of the epoxy resin film 17, and the process of the present invention is completed.

At this time, the straight pipe cut out from the existing drainage standpipe may be corrected in parallel and reused in place of the new straight pipe. It is preferable to connect a straight pipe. As the straight pipe connecting means, for example, butt joining using a no-hub joint 18 or the like is employed.

It is preferable to repeat the cutting step (A), the penetration portion correction step (B), and the connecting portion correction step (C) described above from any floor sequentially or in parallel.

According to the above correction method, for example, two dwelling units on the upper and lower floors can be constructed in about half a day, and the drainage stack can be corrected while the residents of the apartment house live. In addition, since there is no restriction such as from the upper floor or from the lower floor and only a predetermined floor can be constructed as a single process, it can be carried out sequentially in accordance with the convenience of the resident of the apartment house.

Moreover, since the length of the drainage standpipe (the slab penetrating portions 11 and 12) to be left is short, the work for installing the diversion guides 16a and 16b, the check for the installation of the diversion guides 16a and 16b, and the confirmation of the film formation state of the epoxy resin Inspection is easy.

Moreover, since the epoxy resin film 17 is formed in a state in which the flow guides 16a and 16b are covered after the flow guides 16a and 16b are attached, the positions of the flow guides 16a and 16b are restricted by the epoxy resin film 17. The mounting state of the diversion guides 16 a and 16 b can be reinforced by the epoxy resin film 17.

Therefore, even if the length of the drainage stack arranged through the slabs on the plurality of floors is long, the resin layer is easily and uniformly applied to the inner surface of all the pipes including the branch pipes in a short time. It is possible to form a pressure fluctuation in the pipe even if the toilet drainage etc. flows at a stroke by attaching the diversion guides 16a and 16b at the time of the drainage stand adjustment to the drainage standpipe not equipped with the diversion guide. Therefore, troubles such as trap breakage can be prevented.

The formation of the epoxy resin film 17 in the penetration portion correcting step (B) may be performed by spray application of an epoxy resin, or other methods (for example, a cylinder impregnated with a liquid epoxy resin proposed in Japanese Patent Application No. 2004-236909) Or a method of forming an epoxy resin film using a cloth-like sheet. In any case, since the formation of the epoxy resin film 17 in the penetration portion correcting step (B) is performed after the straight pipe is cut, it is easy to check and check the film formation state of the poxy resin, and the epoxy resin film 17 can be easily formed. And it can be formed reliably.

It is a schematic diagram which shows the correction method of the drainage stack of this invention. It is a vertical side view which shows the penetration part correction process of this invention. It is a vertical side view which shows the penetration part correction process following FIG. It is a vertical side view which shows the connection part correction process of this invention. It is explanatory drawing of "the correction method of a drainage vertical pipe" of patent document 1. FIG. 10 is an explanatory diagram of “pipeline repair method” in Patent Document 2. FIG. 10 is an explanatory diagram of “pipe lining method” in Patent Document 3. FIG.

DESCRIPTION OF SYMBOLS 1, 2 Concrete slab 1a, 2a Slab floor surface 2b Slab ceiling surface 10 Drainage pipe 11,12 Slab penetration part 13a Straight pipe part 13b New straight pipe 15 Branch pipe 15a Connection port 16a, 16b Splitting guide 17 Epoxy resin film

Claims (2)

A method for correcting a drainage stack arranged through a concrete slab constituting a slab floor surface of a plurality of floors,
The drainage stack between the floor to be corrected and the upper floor was connected to the drainage collecting pipe joint and above and below it.
Cutting that cuts at a predetermined position from the slab floor surface of the current floor and at a predetermined position from the slab ceiling surface of the upper floor so that a part of the straight pipe remains as a slab penetration portion, and removes the connecting portion therebetween Process,
The inner surface of the slab penetration part of the drainage stack remaining on the slab floor of the current floor and / or the slab ceiling of the upper floor is polished and cleaned, and the inner surface facing the connection port of the branch pipe flows from the branch pipe. After installing the shunt guide that branches the drainage that is discharged from the upper floor and flows down the drainage stack inner pipe to the left and right above the position where the drainage collides, the epoxy resin film is applied to the inner surface of the slab penetration part A through-portion correcting step for forming the shunt guide in a covered state;
A method for correcting a drainage stack, comprising: a connecting portion correcting step of adding a new pipe to a portion removed in the cutting step. The drainage stack pipe correcting method according to claim 1, wherein the cutting step, the penetration portion correcting step, and the connecting portion correcting step are repeated sequentially or in parallel from an arbitrary floor.

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