JP5608582B2 - Repair method for drainage pipes of multi-story buildings - Google Patents

Description

  The present invention relates to a method for repairing drainage pipes for existing multi-layer buildings with a vented vertical pipe system (two-pipe type).

Conventionally, as a drainage pipe of a multi-layered building such as an apartment house, there is a ventilating vertical (two-pipe) drainage pipe (see, for example, Patent Document 1).
For example, as shown in FIG. 15, the drainage pipe A of the vented vertical pipe system is formed by connecting the drainage horizontal branch pipes 4 of the respective floors and connecting the drainage pipes 3 and the drainage pipes 3 supported by the floor slab S. The drainage standpipe 1 formed by connecting to the drainage stand, the drainage horizontal main pipe 5, the leg joint 6 connecting the drainage standpipe 1 and the drainage horizontal main pipe 5, and the drainage standpipe 1 are provided. And a vent pipe 7 connected directly above the leg joint 6 of the pipe 1.
That is, this drain pipe A is designed so that the upper half of the drainage horizontal main pipe 5 becomes a ventilation layer in order to avoid troubles (blowing from the trap, suction, etc.) when a large number of residents drains at once in the apartment house. A vent pipe 7 is provided.

JP-A-7-18710 JP 2006-70542 A JP 2009-25282 A

On the other hand, if the drainage pipe is used for a long time, the inner diameter of the pipe becomes thin due to the occurrence of rust or adhesion of filth residue, etc., leading to a decrease in drainage capacity, clogging, or part of the pipe There is a possibility that water leakage may occur due to perforations.
Therefore, when such a problem occurs, it is necessary to renovate the drainage pipes. However, in the case of multi-layered buildings, especially apartment buildings, residents live and often go out, so they do not feel much inconvenience. Renovation work can only be done for a few hours in the daytime, but in such a case, it is necessary to work on many floors at the same time with a large number of personnel.

On the other hand, as shown in FIG. 15, the existing joint drainage joint 2 has a gap between the through hole of the floor slab S and the through hole of the floor slab S. If the mortar M around the merging / draining joint 2 is not crushed using a chipping machine or the like, the merging / draining joint 2 cannot be removed.
Accordingly, when the repair work on multiple floors is simultaneously performed as described above, it is necessary to prepare a large number of devices used for repair such as a chiseling machine, which is costly.

  In view of the above circumstances, the present invention is to repair drainage pipes of multi-layered buildings that can be repaired efficiently without causing inconvenience to residents as much as possible, even if the repair work of existing drainage pipes that have deteriorated over a plurality of days. The purpose is to provide construction methods.

  In order to achieve the above object, the drainage pipe repair method for multi-layer buildings according to the present invention (hereinafter referred to as “the repair method of the present invention”) is a horizontal branch pipe connection to which the drainage horizontal branch pipes of each floor are connected. A drainage standpipe formed by connecting a drainage pipe in the vertical direction, a drainage horizontal main pipe, and the drainage vertical pipe and the drainage horizontal main pipe. A drainage pipe repairing method for repairing a drainage pipe of a multi-layered building including a leg joint that is connected to the drainage stack and a vent pipe that is connected to the drainage stack directly above the leg joint. The drainage stack is cut immediately above the existing joint drainage joint at the lowermost end of the drainage stack, and the vent pipe is cut below the floor slab on which the existing joint drainage joint at the lowermost end is supported, Confluence drainage joint for renewal of existing joint pipe joint at the lowest end of the vertical pipe The drainage standpipe and the leg joint are connected to the leg joint via the vent pipe connecting joint having a branching portion that branches and obliquely upwardly branches the exchanged confluence drainage joint and the leg joint that have been replaced. The bottom end of the drainage standpipe is updated, and the bottom end update step of connecting the branch of the vent pipe connection joint and the remaining lower end of the vent pipe with the vent pipe connection joint is updated. It is characterized by being implemented first.

The repair method of the present invention is not particularly limited, but the joint for connecting a vent pipe includes a joint body part and a branch part branched from the joint body part, and the body part is at the upper end at the lower end of the renewal merge drainage joint. The exchange joint has an exchange opening that can adjust the insertion length of the renewal, and the bottom joint is connected to the leg joint through the hole of the floor slab generated by the removal of the existing joint drain joint at the lowermost end. In the state where the lower end difference port is inserted deeply into the exchange receiving port, the upper end core of the leg joint and the joint body portion of the joint for connecting a vent pipe are arranged so as to face downward from the floor slab on the upper floor of the floor. After supporting the renewal confluence drainage joint on the floor slab so that it is aligned with the core, push down the vent pipe connection joint downward to connect the lower end of the joint body of the vent pipe connection joint to the leg joint It doesn't matter.
That is, with the above configuration, the lower end of the upper drainage stack of the renewal merge drainage joint and the upper end of the lower leg joint are not obstructed, and the renewal merge drainage joint can be easily constructed. it can.

In addition, the repair method of the present invention is not particularly limited, and the existing combined drainage joint is provided with a swirl vane that turns the drainage flowing down inside into a swirling flow, and is updated to a special drainage joint having a higher drainage capacity than the existing combined drainage joint. It doesn't matter if you do.
That is, with the above configuration, the drainage capacity of the drainage stack is improved, and a large number of side branch pipes can be connected to one special drainage joint.
Therefore, if the horizontal branch pipe connected to the drainage stack provided in parallel with the drainage stack to be updated is also connected to the updated special drainage joint, no other drainage stack is required.
Further, the repair of other drainage stacks becomes unnecessary and the repair cost can be reduced.
In addition, it becomes possible to increase the number of sanitary equipment in each dwelling unit and increase the number of reforms.
In addition, although it does not specifically limit as said special drainage coupling, For example, commercial items, such as brand name ESLON AD slim made by Sekisui Chemical Co., Ltd., can be used.

Furthermore, in the case of using the special drainage joint as described above, the renovation method of the present invention first updates the lowest end, and then updates the existing joint drainage joint from the lower floor to the upper floor to the special drainage joint. While constructing and interposing a branch joint having a branch part inclined obliquely upward toward the opening end in the drainage stack portion between the special drainage joint that has been renewed and the existing joint drainage joint immediately above Preferably, the vent pipe is branched, and the branch portion of the vent pipe and the branch portion of the branch joint are connected via the joint for connecting the vent pipe.
That is, the drainage capacity of the drainage stack is increased in the part where the construction of the special drainage joint is completed, but the drainage capacity remains unchanged in the part where the renewal has not been completed.
Therefore, if a large amount of drainage flows into the drainage standpipe, troubles such as blowing out or sucking in from the trap of drainage equipment connected to the side branch pipe of the existing joint drainage joint immediately above the special drainage joint that has been renewed may occur. However, if it is done as described above, the drainage stack is connected to the vent pipe between the existing drainage joint immediately above the special drainage joint, and the above trouble does not occur.

In the present invention, the joint for connecting a vent pipe is not particularly limited, but a flexible pipe such as a bellows pipe or a rubber pipe is preferably used.
That is, the branch portion of the vent branch joint and the vent pipe can be easily connected.

Further, the refurbishment method of the present invention uses a joint having two or more branch portions whose branch positions are shifted in the vertical direction as the joint for connecting the vent pipe, and in the lowest end update process, While the upper branch part is connected to the vent pipe, the other branch part may be connected to another drainage stack provided in parallel.
That is, one vent pipe and a plurality of drainage stacks may be connected. However, if one drainage stack is repaired as described above, another drainage stack can be used. Become.
And since the uppermost branch part of the coupling for vent pipe connection is connected to a vent pipe, the drainage of another drainage stack does not flow into the vent pipe side. That is, the drainage flowing down the other drainage stack does not block the ventilation pipe.

  The renovation method of the present invention has a lateral branch pipe connecting portion to which drainage lateral branch pipes of each floor are connected, and is formed by connecting a confluence drainage joint supported by a floor slab and a drain pipe in the vertical direction. A drainage standpipe, a drainage horizontal main pipe, a leg joint that connects the drainage standpipe and the drainage horizontal main pipe, and provided along the drainage standpipe, and connected directly above the leg joint of the drainage standpipe A drainage pipe repair method for repairing a drainage pipe of a multi-layered building including a vent pipe, wherein the drainage stack is cut immediately above an existing joint drainage joint at the lowest end of the drainage stack, and the vent pipe Is cut below the floor slab where the lowermost existing joint drainage joint is supported, and the lowermost existing joint pipe joint of the drainage stack is replaced with the replacement joint drainage joint. Has a branch that branches off the leg joint diagonally upward Connected to the leg joint via the vent pipe connecting joint and returned to the state where the drainage stack and the leg joint are communicated with each other, while updating the lowermost end of the drainage stack, the branch part of the vent pipe connecting joint Since the lowest end update process of connecting the remaining lower end of the vent pipe with the vent pipe connecting joint is first performed, the upper floor confluence drainage joint can be updated with the function of the vent pipe secured. it can. That is, drainage is possible as usual if the integration of the renewal merge drainage joint into the drainage stack and the connection of the side branch pipe are completed.

Therefore, in order to renew all existing drainage branch joints, the construction time is limited, and in the case where the construction spans multiple days, the residents can drain the drainage from the equipment in the dwelling units except for the construction time.
And since it is not necessary to perform construction on a multi-story floor at the same time, it is not necessary to prepare a large number of scrapers at a time, and the construction cost can be reduced.

It is the schematic of the existing drain piping explaining the 1st process of 1st Embodiment of the repair method of the drain piping concerning this invention. It is a figure explaining the post process of FIG. It is a figure explaining the post process of FIG. It is a figure explaining the post process of FIG. It is a figure explaining the post process of FIG. It is a figure explaining the post process of FIG. It is a figure explaining the post process of FIG. It is a figure explaining the post process of FIG. It is a figure explaining the post process of FIG. It is a front view showing one example of the joint for vent pipe connection used for the repair method of a 1st embodiment. It is a figure showing the cross section of the coupling for vent pipe connection of FIG. 10, and the cap with which the branch part is mounted | worn. It is sectional drawing showing an example of the exchange joint used for the repair construction method of 1st Embodiment. It is a front view of one example of the joint for vent pipe connection used for 2nd Embodiment of the repair method of the drain piping concerning this invention. It is a figure which shows typically an example of the existing drainage piping in which the coupling for vent pipe connection of FIG. 13 is used for repair. It is a figure showing an example of the conventional vent pipe type drainage piping.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 9 show the first embodiment of the repair method according to the present invention in the order of steps.

In this refurbishment method, the existing ventilation standpipe type (two-pipe type) drainage pipe A of the apartment house as shown in FIG. 1 can be renovated as follows.
(1) As shown in FIG. 1, the drainage horizontal main pipe 5 is along line a in the vicinity of the existing leg joint 6, and the vent pipe 7 is the floor slab S on the lowermost floor, which is directly above the existing leg joint 6. Cut along line b below. Moreover, the drainage pipe 3 connected to the lower side of the existing joint drainage joint 2 on the lowest floor is cut along the c line. Then, the existing leg joint 6 is removed together with a part of the drainage horizontal main pipe 5, the vent pipe 7 and the drain pipe 3 remaining in the state of being connected to the vent pipe 7.
In addition, the position of an ac line is suitably changed according to the condition of a construction site.
(2) As shown in FIG. 2, the side branch pipe 4 connected to the existing joint drainage joint 2 on the lowest floor is removed.

(3) Hitting the floor slab S around the lowermost existing joint drainage joint 2 using a chiseling machine (not shown), as shown in FIG. 2, the lowermost existing joint drainage joint 2 Remove. When removing the existing joint drainage joint 2 on the lowermost floor, the upper drainage pipe 3 connected to the existing joint drainage joint 2 on the lowermost floor is cut or the existing joint drainage joint 2 on the lowermost floor is cut. When the rubber ring is connected to the receiving port, the bottom is pulled out and the existing joint drainage joint 2 on the lowest floor and the drainage pipe 3 on the upper part are separated.
The step (1) and the step (2) may be performed in reverse, or the step (2) may be performed in the middle of the step (1).

(4) As shown in FIG. 3, the renewal leg joint 6 a is connected to the drainage horizontal main pipe 5. The renewal leg joint 6a may be provided with swirl vanes inside to increase the drainage capacity.
(5) As shown in FIG. 4, a special drainage joint (for example, trade name ESLON manufactured by Sekisui Chemical Co., Ltd.) is used as a combined drainage joint for renewal while avoiding the upper drainage stack 1 and the side branch pipe 4 as required. AD slim) 2a is inserted from the upper part of the floor slab S into the slot H remaining in the floor slab S so that the lower end of the AD slim) 2a faces the lower side of the floor slab S. As shown in FIG. 4, the joint 8 a is in a state where the lower end difference port 21 of the special drainage joint 2 a is inserted deeply into the exchange receiving port 81 a of the vent pipe connection joint 8 a.

That is, the vent pipe connecting joint 8a includes a main body 81 and a branching portion 82 as shown in FIGS.
The main body 81 includes an exchange receiving port 81a and a lower end inserting port 81b.

The exchange receiving port 81a is internally connected with a rubber ring packing 81c at the upper end and connected in a water-stopped state by inserting the lower end opening 21 of the special drainage joint 2a. In addition, the insertion length of the lower end insertion opening 81a is such that the insertion length of the lower end insertion opening 21 into the exchange reception opening 81a is longer than the reception opening length of the upper reception opening 22 of the special drainage joint 2a. Can be adjusted.
The branch portion 82 is provided to be inclined upward (30 to 60 ° with respect to the tube axis of the main body portion 81) from an intermediate position of the main body portion 81, and extends outward along the opening edge. A flange portion 82a is provided.

  If the chip hole H is large, the lower end difference port 21 of the special drainage joint 2a is inserted deeply into the exchange receiving port 81a of the vent pipe connection joint 8a, and then the vent pipe connection joint 8a is special drainage. You may make it insert from the upper direction of the floor slab S with the lower end part of the coupling 2a.

(6) As shown in FIG. 5, the upper receiving port 22 of the special drainage joint 2a is maintained while the bottom end 21 of the special drainage joint 2a is inserted deeply into the exchange receiving port 81a of the vent pipe connection joint 8a. The lower end of the drainage standpipe 1 is inserted into the side branch pipe 4, and the side branch pipe 4 is inserted into the side branch pipe connection port 23 of the special drainage joint 2a.
In addition, although the upper receiving port 22 and the side branch pipe connection port 23 of the special drainage joint 2a are not shown in figure, the rubber ring packing is built in, and the drainage standpipe 1 and the side branch pipe 4 become a special drainage joint by insertion. 2a is connected in a water-stopped state.

(7) As shown in FIG. 6, the vent pipe connecting joint 8a is pushed down to connect the lower end difference port 81b of the vent pipe connecting joint 8a to the updating leg joint 6a.
(8) As shown in FIG. 6, one end of a flexible pipe (for example, snake joint) 9a is fitted on the vent pipe connecting joint 8a, and the other end is externally attached to the remaining lower end of the vent pipe 7 protruding from the floor slab S. The flexible pipe 9a is fastened by the fastening band 91 from the outside of the outer fitting portion and the vent pipe 7 and the vent pipe connecting joint 8a are connected via the flexible pipe 9a.

(9) As shown in FIG. 6, the mortar M is filled in the gap between the chip hole H and the special drainage joint 2a, and the special drainage joint 2a is fixed to the floor slab S.
In addition, you may make it perform the process of said (9), after updating to all the special drainage couplings 2a.
(10) When the step (8) or (9) is completed, that is, after the lowermost end update step is completed, the existing combined drainage joint 2 supported by the floor slab S on the floor immediately above, and the drainage pipes 3 above and below it. And the floor slab S on the upper floor (for example, the second floor) is removed, and the existing combined drainage joint 2 on the upper floor is removed together with a part of the drainage stack connected to the lower floor slab S.

(11) As shown in FIG. 7, the special drainage joint 2b is avoided from the upper drainage stack 1 and the side branch pipe 4 as necessary from above the crevice hole H formed by removing the merging drainage joint 2. The floor slab S is inserted into the chip hole H so that the lower end of the floor slab S protrudes below the floor slab S.
(12) As shown in FIG. 8, the renewal special drainage joint 2b is inserted into the upper receptacle 22 of the special drainage joint 2a with the lower end of the drainage stack 1 and the side branch pipe 4 is connected to the side branch of the special drainage joint 2a. Insert into the tube connection port 23.

(13) As shown in FIG. 8, with the flange 24 provided at the lower end of the special drainage joint 2b in a state where the lower end of the short pipe joint 8b is inserted deeply into the exchange receiving port 81a of the vent pipe connection joint 8a, Then, the upper end of the short pipe joint 8b is flange-connected.
(14) Although not shown, the vent pipe connecting joint 8a is pushed down and its lower end 91b is inserted into the upper receptacle 22 of the special drainage joint 2a on the lowermost floor to connect the vent pipe connecting joint 8a and the special drainage. The joint 2a is connected in a water stop state.
(15) The cap body 83 of the cap 8c shown in FIG. 11 is inserted and branched until the flange portion 84 abuts on the flange portion 82a of the branch portion 82 of the vent pipe connecting joint 8a as shown by a chain line in FIG. The part 82 is sealed.
Although the cap 8c is not shown, the cap 8c can be attached to the branch portion 82, and the positioning projection (or positioning recess) provided on the flange portion 84 in a state where the cap 8c is normally attached to the branch portion 82 It fits into a positioning recess (or positioning projection recess) provided in the flange portion 82 a of the branching portion 82, and the front end surface of the cap body 83 is almost flush with the inner peripheral surface of the body portion 81 by this fitting. It is formed to become one.
(16) For the third floor and above, the above (10) to (15) are repeated, and the drainage stack pipe part and the side branch pipe part are repaired in order toward the upper floor.
The step (15) may be performed prior to any of the steps (10) to (14).

(17) For connecting a vent pipe between the updated special drainage joint 2b located on the uppermost floor and the existing joint drainage joint 2 on the floor directly above the special drainage joint 2b within the set working time of one day As shown in FIG. 12, a main body 85 has the same structure as the vent pipe connecting joint 8a in the horizontal direction of the vent pipe connecting joint 8a as shown in FIG. Then, after interposing the branch joint 8d and the socket joint 8e in which the branch part 86 is inclined obliquely downward from the main body part 85, the branch part 82 of the vent pipe connection joint 8a and the branch part of the branch joint 8d 86 is connected via a flexible pipe 9b having a different diameter, and the construction work for one day is completed.
In FIG. 12, 85a is an exchange receiving opening, 85b is a lower end opening, and 85c is a rubber ring packing.
(18) The steps (16) and (17) are repeated until the repair to the top of the drainage stack 1 is completed.

In this repair method, as described above, after the bottom end update process is performed, the existing combined drainage joint 2 on the upper floor is replaced with the special drainage joint 2b so that the repair can be performed. The state where the vent pipe 7 is always communicated with the lower end of the standing pipe is maintained.
Therefore, it cannot be completed in one day of construction, and even when the repair work spans multiple days, the connection between the special drainage joint 2b of the repaired part and the upper and lower drainage stacks and the side branch pipes is completed. If the work for one day is completed, it can be used in the same manner as before even if drainage is allowed to flow through the drainage stack before the work is resumed.

Since the special drainage joint 2a (2b) is used as the merged drainage joint for renewal, the drainage flowing down from the upper part is swirled by the swirling blades of the special drainage joint 2a (2b) and is discharged into the drainage stack 1 A stable air core is formed.
Therefore, the drainage capacity is increased compared to the conventional case. As a result, if a special drainage joint 2a (2b) with a plurality of horizontal branch pipe connection ports is used, it will be sufficient when a drainage device in a dwelling unit is expanded by reforming with a single drainage stack. become able to.

  Further, the insertion length of the exchange receiving port 81a into the exchange receiving port 81a of the lower end opening 21 of the special drainage joint 2a is longer than the receiving length of the upper receiving port 22 of the special drainage joint 2a, and the lower end opening. Since the vent pipe connecting joint 8a having the exchange receiving port 81a in which the insertion length of 21 is adjustable is used, workability is good.

Furthermore, the blowout and suction from the trap of the drainage equipment that is closed at the existing merged drainage joint 2 part that has not been repaired immediately above the repaired part and is connected to the side branch pipe 4 connected to this existing merged drainage joint 2 Trouble may occur, but within the set working time of one day, the updated special drainage joint 2b located on the top floor and the existing combined drainage joint 2 on the floor directly above the special drainage joint 2b Since the drainage stand pipe portion between them is branched and this branch portion is communicated with the vent pipe 7, the above trouble can be prevented.
Further, the drainage stack 1 is branched using a communicable vent pipe connection joint 8a, the vent pipe 7 is branched using a communicable branch joint 8d, and the branch part 82 and the branch part 86 are connected to a flexible pipe. Since connection is made at 9b, workability is good.

Because the vent pipe connection joint 8a is used as a part of the renewed drainage stack, and the vent pipe connection joint 8a used as a part of the drainage stack is closed using a detachable cap 8c. The drainage can be prevented from leaking outside through the branching portion 82, and if the cap 8c is removed, the branching portion 82 becomes an inspection port of the drainage stack, and an inlet of a cleaning hose for cleaning the drainage stack Can also be used.
In addition, since the front end surface of the cap main body 83 is flush with the inner peripheral surface of the main body portion 81 in a state where the cap 8c is normally attached, the drainage does not enter the branch portion 82.

  FIG. 13 shows a connecting pipe joint used in the second embodiment of the repairing method of the present invention, and FIG. 14 schematically shows an existing drainage pipe in which this connecting pipe joint is used.

That is, as shown in FIG. 13, the vent pipe connection joint 8 f includes a main body portion 87, a first branch portion 88, and a second branch portion 89.
The main body 87 has the same structure as the main body 81 of the communication pipe joint 8a. In FIG. 13, 87a is an exchange receiving port, 87b is a lower end opening, and 87c is a rubber ring packing.

The first branch part 88 and the second branch part 89 are branched from the main body part 87, respectively, and the first branch port is provided on the upper side of the second branch part 89, as will be described later. When the second branch part 89 is connected to the drainage stack 1a, the drainage that flows into the main body 87 from the second branch part 89 via the drainage stack 1a does not flow into the first branch part 88. The inclination angle and the vertical position are adjusted.
On the other hand, as shown in FIG. 14, in the drainage pipe B in which the vent pipe connection joint 8f is used, the vent pipe 7a is branched into two at its lower end, and one branch vent pipe 71 is connected to the leg joint 6. The other branch ventilation pipe 72 is connected to the other drainage stack 1 a immediately above the existing leg joint 6.
That is, the vent pipe 7 is shared by two drainage paths.

In order to repair the drainage pipe B using the vent pipe connecting joint 8f, first, the vent pipe 7a is cut immediately above the branch portion of the vent pipe 7, and the vent pipe 7a is passed through in the same manner as the connecting pipe joint 8a. Using the joint 8f for trachea connection, the lowest end update process of the drainage path on the drainage stack 1 side is performed. The vent pipe 7 is connected via a first branch portion 88.
Next, the drainage stack 1 a is cut immediately above the connection position of the branch ventilation pipe 72, and the drainage stack 1 a is connected to the second branch portion 89.

After that, the drainage path on the drainage stack 1 side is repaired by carrying out the steps after (10) of the first embodiment.
In addition, the drainage channel on the drainage stack 1a side is also repaired by performing the steps after (10) of the first embodiment as necessary.
In addition, if the main body part 87 is provided with a gutter or the like on the inner wall surface so that drainage does not enter the second branch part 89, the second branch part 89 and the vent pipe 7a are connected, and the first branch part 88 is drained. You may make it connect the standpipe 1a.

The repair method of the present invention is not limited to the above embodiment. For example, in the above embodiment, the renewal leg joint is connected to the remaining existing drainage horizontal main pipe, but if the building beams do not get in the way, in order to further increase the drainage capacity, The drainage horizontal main pipe may be replaced with one having a large diameter. In such a case, the leg joint may be such that the drainage horizontal main pipe side has a larger diameter than the drainage stack pipe side.
In the above embodiment, the special drainage joint is used as the renewal merge drainage joint, but other drainage joints may be used as long as the drainage capacity can be sufficiently secured.

In the above embodiment, the vent pipe connection joint is used to connect the upper floor special drainage joint and the lower floor special drainage joint. It doesn't matter if you do.
In the second embodiment, the vent pipe connecting joint has two branch portions, but three or more may be used.

A, B Drainage pipe 1, 1a Drainage stack 2 Existing joint drainage joint 2a, 2b Special drainage joint (joint drainage joint)
3 Drainage pipe 4 Horizontal branch pipe 23 Horizontal branch pipe connection part 5 Drainage horizontal main pipe 6 Existing leg joint 6a Renewal leg joint 7, 7a Vent pipe 8a, 8f Vent pipe connection joint 81 Main part 81a, 87a Exchange receiving port 82 Branching portion 88 First branching portion 89 Second branching portion S Floor slab

Claims (6)

A drainage standpipe formed by connecting a drainage pipe in a vertical direction with a joint drainage joint supported by a floor slab, having a side branch pipe connection part to which a drainage side branch pipe of each floor is connected,
Drainage horizontal main pipe,
A leg joint for connecting the drainage stack and the drainage horizontal main pipe;
A drainage pipe renovation method for repairing a drainage pipe of a multi-layered building provided with a vent pipe provided along the drainage standpipe and connected directly above the leg joint of the drainage standpipe,
The drainage standpipe is cut immediately above the existing combined drainage joint at the lowermost end of the drainage standpipe, and the vent pipe is cut below the floor slab on which the existing joint drainage joint at the lowermost end is supported. The existing joint pipe joint at the lowermost end of the pipe is replaced with a renewal confluence drainage joint, and the replacement renewal confluence drainage joint and leg joint are connected via a vent pipe connection joint having a branching portion that branches obliquely upward. The drainage standpipe and the leg joint are connected to each other and returned to the state where the drainage standpipe and the leg joint are connected, and the lowermost end of the drainage standpipe is updated, while the branching portion of the vent pipe connection joint and the remaining lower end of the vent pipe First of all, the bottom end renewal process of connecting with a joint for connecting a vent pipe is carried out. The joint for connecting a vent pipe includes a main body part and a branch part branched from the main body part,
The main body has an exchange port at the upper end that can adjust the insertion length of the lower end of the renewal merge drainage joint,
The renewal confluence drainage joint is disposed through the hole of the floor slab generated by the removal of the existing joint drainage joint at the lowermost end so that the lower end of the joint faces downward from the floor slab on the upper floor of the leg joint, In a state where the lower end opening is inserted deeply into the exchange opening,
After supporting the renewal merge drainage joint on the floor slab so that the core of the upper end of the leg joint matches the core of the joint body of the joint for vent pipe, push down the joint for vent pipe downward. The method for repairing a drainage pipe of a multilayer building according to claim 1, wherein the lower end of the joint body part of the joint for connecting a vent pipe is connected to the leg joint.   3. The multi-layer building according to claim 1, wherein the existing combined drainage joint is provided with a swirl blade that turns the drainage flowing down into the swirl flow, and is updated to a special drainage joint having a higher drainage capacity than the existing combined drainage joint. Drainage pipe renovation method.   After the bottom end renewal process is completed, the existing joint drainage joint is renewed to the special drainage joint from the lower floor to the upper floor, and the renewed special drainage joint and the existing joint drainage joint immediately above A branch joint having a branch portion that is inclined obliquely upward toward the opening end is interposed in the drainage stack portion between them, and the vent pipe is branched to pass the branch portion of the vent pipe and the branch portion of the branch joint. The repair method of the drainage piping of the multilayer building of Claim 3 including the process connected through the joint for trachea connection.   The method for repairing a drainage pipe of a multilayer building according to any one of claims 1 to 4, wherein the joint for connecting a vent pipe is a flexible pipe.   The vent pipe connecting joint has two or more branch parts whose branch positions are shifted in the vertical direction, and connects the uppermost branch part of the vent pipe connecting joint to the vent pipe in the lowermost end updating step. The repair method of the drainage piping of the multilayer building in any one of Claims 1-5 which connects another branch part to the other drainage stack provided in parallel.

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