JP2013119869A - Bypass construction method with bidirectional closing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bypass pipe with a bidirectional closing function for using a bypass construction method using a water cut-off plug, a seal plug and a bypass unit, and the bypass construction method with the bidirectional closing function.SOLUTION: The bypass pipe with the bidirectional closing function includes a bypass pipe body 3 forming a straight line-shaped rectangular cylindrical shape having both end opening parts 1 and 2 at the ends, and side surface opening parts 4 and 5 of the same diameter as both end opening parts 1 and 2 on both side surfaces of the bypass pipe body 3. A rectangular box 7 bulged to the outside is formed in both end opening parts 2 on the seal plug side (the downstream side), and a blocking opening 9 capable of inserting a plate-like blocking plate (unillustrated) for blocking flowing water, is formed on an upper surface of the box 7. Rectangular boxes 12 and 12 swelling to the outside are integrally formed in the side surface opening parts 4 and 5, and blocking openings 13 and 13 capable of inserting plate-like blocking plates (unillustrated) for blocking the flowing water, are formed on an upper surface of the boxes 12 and 12.

Description

  The present invention relates to a bypass construction method with a two-way cutoff function that uses a bypass pipe with a two-way cutoff function when a new pipe is switched to an existing pipe of a sewer.

When repairing or repairing the inside of a sewer manhole, from the viewpoint of hygiene, safety, etc., it is necessary to take measures against the sewage (sewage) that is flowing down. Various measures are taken accordingly. For example, when the diameter of the connected sewer pipe is large and the scale is relatively large, it is difficult to stop the flow of sewage even if it is temporary. For example, the bypass method as shown in FIG. Thus, a method of bypassing the construction site A is implemented.
Specifically, first, an air injection type water stop plug C is installed near the entrance of the sewer pipe B on the upstream side of the manhole A at the construction site to block the flow of sewage. Next, the sewage blocked by the water stop plug C is sucked by the bypass pipe E inserted into the manhole D on the upstream side of the construction site A and the pump G installed on the road F, and the construction site A From the bypass pipe I inserted into the manhole H on the downstream side of the sewage, it is discharged to the downstream sewage pipe K loaded with sandbags J at the inlet in order to prevent backflow of sewage. If it does in this way, sewage will flow down to the downstream side continuously, without passing construction site A. L and M are sewer pipes.

The present inventor has developed a bypass construction method using a water stop plug, a seal plug, and a bypass unit improved from the bypass construction method (see Patent Document 1).
This bypass construction method has a large hole for allowing sewage to flow down in the central part of the main body, and is configured so that a hollow O-ring filled with fluid is sandwiched between two sandwiching members. A water stop plug (upstream side) and a seal plug (downstream side) having a structure in which the outer periphery of the O ring is pushed outward by compressing the O ring in the axial direction by narrowing the interval between members; The bypass unit is configured to be connected to the large hole of the water stop plug and the seal plug, and the water stop plug and the seal plug are installed at the upstream port and the downstream port, respectively, and they are bypassed. By connecting with the pipe bypass unit, the upstream sewer pipe and the downstream sewer pipe are completely shut off, and the space where the sewage flows and the work space are separated. It is those that can be.

  Furthermore, the present inventor has studied a bypass construction method that uses a bypass construction method using a water stop plug, a seal plug, and a bypass pipe bypass unit to switch a newly installed pipe to an existing pipe of a sewer.

Japanese Patent Application No. 2003-421792

  The present invention uses a bypass pipe with a two-way cutoff function by using a bypass construction method using a water stop plug, a seal plug and a bypass unit when installing a new pipe to an existing pipe of a sewer. The purpose is to provide a bypass method with a deadline function.

  The bypass pipe with a two-way cutoff function according to the present invention includes a bypass pipe body having a straight rectangular tube shape having opening portions at both ends, and the same diameter as the opening portions on both sides of the bypass pipe body. The side opening is provided with a flange around each mouth edge so that it can be connected to an existing bypass pipe connected to a known water stop plug and seal plug, and further sealed. A rectangular box bulging outward is integrally formed at both end openings on the plug side, and a blocking opening for inserting a flat blocking plate for blocking running water is formed on the upper surface of the box. A flange is also provided around the mouth edge of the section so that it can be connected to a newly established bypass pipe. Further, a rectangular box bulging outward is also integrally formed at the side opening, and a water flow is formed on the upper surface of the box. The And it forms a blocking aperture can be inserted a flat cut-off plate for disconnection.

  The bypass construction method with a two-way cutoff function of the present invention digs up the area where the existing pipe and the new pipe are joined to a space where the machine can be installed, forms a vertical shaft, exposes the existing pipe, The first step of separating and removing the upper half of the pipe in the minimum range of bypass pipe installation, which becomes the junction with the pipe, and both upstream and downstream sides of the existing pipe in the shaft from the opening of the upper half of the existing pipe A water stop plug and a seal plug are installed in the pipe, the flow of sewage is blocked, the existing bypass pipe is connected to the water stop plug and the seal plug, and a rectangular bypass pipe with a two-way cutoff function is connected to the middle of the existing bypass pipe After installing the rectangular bypass pipe with the two-way cutoff function, perform appropriate suspension protection, separate and remove the lower half of the remaining pipe from the existing pipe, and after removing the existing pipe, The reach of the new pipe After the completion of the construction of the new manhole, the lower part of the new manhole is completed, and after the new pipe is connected to the new manhole, a seal plug is installed in the new pipe. Fifth step of connecting the side opening of the bypass pipe with the newly installed bypass pipe, and the two-way cutoff function after the connection of the rectangular bypass pipe with the two-way cutoff function and the new pipe is completed and preparation for receiving the incoming water downstream is completed. Insert a blocking plate into the box at the opening of the rectangular bypass pipe with a block to block the flow of the existing pipe to the seal plug, and take out the blocking plate from the box at the side opening of the rectangular bypass pipe with a two-way cutoff function to sewer After the completion of switching the outflow direction and completion of appropriate suspension protection, the flange of the rectangular bypass pipe with the two-way cutoff function and the flank of the existing bypass pipe are replaced. The seventh step of releasing the fixed connection of the existing pipe and removing the existing plug seal plug and the existing bypass pipe, and after confirming the completion of the installation, the bottom of the new manhole is finished in a reverse arch shape, and the invert is built. After completion, after an appropriate curing, the seal plug of the new pipe, the new bypass pipe and the rectangular bypass pipe with the two-way cutoff function are removed, and the shaft is backfilled to complete the construction.

The bypass pipe with a two-way cutoff function of the present invention is opened on both sides by utilizing a bypass construction method using a water stop plug, a seal plug and a bypass unit when a new pipe is switched to an existing pipe of a sewer. Since the part is provided, the outflow direction can be easily switched by removing the shielding plate.
Moreover, the bypass construction method with the two-way cutoff function of the present invention can switch and install a new pipe to an existing pipe of a sewer without blocking the flow of sewage.

It is a top view of the bypass pipe with a two-way cutoff function of the present invention. It is a front view of the bypass pipe with a two-way cutoff function of the present invention. It is a right view of the bypass pipe with a two-way cutoff function of this invention. It is a 1st process top view of a bypass construction method with a two-way deadline function of the present invention. It is a 2nd process top view of the bypass construction method with a two-way cutoff function of this invention. It is a 3rd process top view of the bypass construction method with a two-way deadline function of the present invention. It is a 4th process top view of the bypass construction method with a two-way deadline function of the present invention. It is a 5th process top view of the bypass construction method with a two-way cutoff function of the present invention. It is a 6th process top view of the bypass construction method with a two-way deadline function of the present invention. It is a 7th process top view of the bypass construction method with a two-way deadline function of the present invention. It is an 8th process top view of the bypass construction method with a two-way cutoff function of the present invention. It is explanatory drawing of the conventional bypass construction method.

One embodiment of a bypass pipe with a two-way cutoff function used in the bypass method with a two-way cutoff function of the present invention will be described below with reference to the accompanying drawings.
As shown in the plan view of FIG. 1, the front view of FIG. 2, and the right side view of FIG. 3, the bypass pipe with a two-way shut-off function has a linear rectangular tube shape with both end openings 1 and 2 at the end. The bypass pipe main body 3 is provided, and side opening parts 4 and 5 having the same diameter as the both end opening parts 1 and 2 are provided on both side surfaces of the bypass pipe main body 3. In FIG. 1, both end openings 1 (right side) are the water stop plug (upstream) side, and both end openings 2 (left side) are the seal plug (downstream) side.
The both end openings 1 and 2 are provided with existing bypass pipes (not shown) provided with flanges 6 and 6 around the respective rims and connected to known water stop plugs (not shown) and seal plugs (not shown). In addition, a rectangular box 7 bulging outward is integrally formed in the opening 2 on both ends on the seal plug side (downstream side), and the upper surface of the box 7 is a flat plate shape that blocks running water A blocking opening 9 into which a blocking plate (not shown) can be inserted is formed.
It should be noted that an existing bypass pipe (not shown) connected to a known water stop plug (not shown) and a seal plug (not shown) is provided on the peripheral surfaces of the flanges 6 and 6 of the opening portions 1 and 2 at both ends. Bolt holes 10 and 10 for attachment are formed so that they can be connected.
The side openings 4 and 5 are also provided with flanges 11 and 11 so that they can be connected to a new bypass pipe. The side openings 4 and 5 also have rectangular boxes 12 and 12 that bulge outward. Formed integrally, the upper surfaces of the boxes 12 and 12 are formed with blocking openings 13 and 13 into which flat blocking plates (not shown) for blocking running water can be inserted.
In addition, flanges 14, 14, and 14 are provided around the mouth edges of the blocking opening 9 and the blocking openings 13, 13.

  Next, the construction procedure of the bypass method with a two-way cutoff function using the bypass pipe with the two-way cutoff function of the present invention will be described below with reference to the accompanying drawings.

1st process: As shown in the top view of FIG. 4, the earth retaining range 17 used as the junction of the existing pipe 15 and the new pipe 16 is dug up to the width which becomes the machine collection | recovery range 18, a shaft is formed, and an existing pipe is formed. 15 is exposed. In addition, since the size of the shaft is possible if the size of the new manhole (manhole) 24 is sufficient for the construction of the bypass method, the shaft is constructed according to the propulsion method.
When the shaft is formed, the pipe upper half of the bypass pipe installation minimum range 19 that becomes a joint between the existing pipe 15 and the new pipe 16 is separated and opened.

  2nd process: As shown in the top view of FIG. 5, the water stop plug 20 and the seal plug 21 are installed in the both upstream and downstream sides of the existing pipe 15 in the shaft from the opening part of the pipe upper half of the existing pipe 15. Damming the sewage flow. Then, the existing bypass pipe 22 is connected to the water stop plug 20 and the seal plug 21, and a rectangular bypass pipe 23 with a two-way cutoff function is connected to an intermediate portion of the existing bypass pipe 22.

Third step: As shown in the plan view of FIG. 6, after installing the rectangular bypass pipe 23 with the two-way cutoff function, appropriate suspension protection is performed. Then, the remaining lower half of the existing pipe 15 is separated and removed.
At that time, the rectangular bypass pipe 23 with the two-way shut-off function opens the both end openings 1 and 2 and closes the side openings 4 and 5 by inserting a blocking plate (not shown). Can flow from the existing pipe 15 downstream of the existing pipe 15 via the water stop plug 20 → the existing bypass pipe 22 → the rectangular bypass pipe 23 with a two-way cutoff function → the existing bypass pipe 22 → the seal plug 21.

  Fourth step: As shown in the plan view of FIG. 7, after the removal of the existing pipe 15 is completed, the new manhole 24 extends to the reachable range of the new pipe 16, that is, to the range where the existing pipe 15 and the new pipe 16 are connected. Build.

  Fifth step: As shown in the plan view of FIG. 8, after the construction of the lower part of the new manhole 24 is completed and the new pipe 16 is connected to the new manhole 24, the seal plug 25 is attached to the new pipe 16. And the seal plug 25 and the side opening 4 or the side opening 5 of the rectangular bypass pipe 23 with the two-way cutoff function are connected by the new bypass pipe 26. At that time, the rectangular bypass pipe 23 with a two-way cutoff function is connected to the new bypass pipe 26 while being in a water-permeable state with the existing pipe 15.

  Step 6: As shown in the plan view of FIG. 9, after the connection of the rectangular bypass pipe 23 with the two-way cutoff function and the new pipe 16 is completed and preparation for receiving the inflow water downstream is completed, the rectangular bypass with the two-way cutoff function A blocking plate (not shown) is inserted into the box 7 of the opening 2 of the pipe 23 to block the flow of the existing pipe 15 to the seal plug 21 and the side opening 4 of the rectangular bypass pipe 23 with a two-way cutoff function. Alternatively, a blocking plate (not shown) is taken out from the box 12 of the side opening 5, the sewage outflow cut-off site is replaced, and the outflow direction is switched.

  Step 7: As shown in the plan view of FIG. 10, after completion of switching of the outflow direction and completion of appropriate suspension protection, the flange 6 of the rectangular bypass pipe 23 with the two-way cutoff function and the flange of the existing bypass pipe 22 (not shown) ) Is released, and the seal plug 21 and the existing bypass pipe 22 of the existing pipe 15 are removed.

Eighth step: As shown in the plan view of FIG. 11, after confirming the completion of the installation, the bottom surface in the new manhole 24 is finished in an inverted arch shape to build an invert.
After completion of invert construction, after proper curing, the seal plug 25 of the new pipe 16, the new bypass pipe 26 and the rectangular bypass pipe 23 with a two-way shut-off function are removed, and the shaft in the earth retaining range 17 is backfilled and the construction is completed And

DESCRIPTION OF SYMBOLS 1 Both-ends opening 2 Both-ends opening 3 Bypass pipe main body 4 Side opening 5 Side opening 6 Flange 7 Box 8 Blocking board (not shown)
9 Blocking opening 10 Bolt hole 11 Flange 12 Box 13 Blocking opening 14 Flange 15 Existing pipe 16 New pipe 17 Earth retaining area 18 Machine recovery range 19 Bypass pipe installation minimum range 20 Water stop plug 21 Seal plug 22 Existing bypass pipe 23 Two-way cutoff Rectangular bypass pipe 24 with functions New manhole
25 Seal plug 26 New bypass pipe

Claims (2)

  The bypass pipe main body having a linear rectangular tube shape having both end openings at the ends, and a structure comprising side opening portions having the same diameter as the both end openings on both side surfaces of the bypass pipe main body, The opening at both ends is provided with a flange around each rim so that it can be connected to an existing bypass pipe connected to a known water stop plug and seal plug, and further bulges outward at both end openings on the seal plug side. A rectangular box is integrally formed, and a blocking opening for inserting a flat blocking plate for blocking running water is formed on the upper surface of the box, and a flange is provided around the edge of the side opening. A rectangular box that bulges outward can be formed integrally with the side opening, and a flat plate-shaped blocking plate that blocks running water can be inserted into the upper surface of the box. Open 2 Direction deadline function bypass pipe and forming a.   Bypassing the existing pipe and the new pipe, the area where the existing pipe and the new pipe are joined is dug up to a size that allows machine installation to form a vertical shaft, and the existing pipe is exposed. The first step of separating and removing the upper half of the pipe is opened, and the water stop plugs and seal plugs are installed on both the upstream and downstream sides of the existing pipe in the shaft from the opening of the upper half of the existing pipe. A second step in which the existing bypass pipe is connected to the water stop plug and the seal plug, and a rectangular bypass pipe with a two-way cutoff function is connected to an intermediate portion of the existing bypass pipe, and a rectangular with a two-way cutoff function After installing the bypass pipe, provide appropriate suspension protection, separate and remove the lower half of the existing pipe, and build a new manhole to the extent that the new pipe can be reached after the existing pipe is removed. The 4th process to do After the construction of the part is completed and the connection of the new pipe is completed to the new manhole, a seal plug is installed in the new pipe, and the seal plug is connected to the side opening of the rectangular bypass pipe with the two-way cutoff function with the new bypass pipe. After completion of the 5 steps and the connection of the rectangular bypass pipe with the two-way cutoff function and the newly installed pipe and the preparation of receiving the inflow water to the downstream side, a blocking plate is inserted into the opening box of the rectangular bypass pipe with the two-way cutoff function. A sixth step of blocking the flow of the existing pipe to the seal plug, taking out the blocking plate from the box at the side opening of the rectangular bypass pipe with a two-way cut-off function, switching the outflow cut-off portion of the sewage, and switching the outflow direction; After completion of switching the outflow direction and proper suspension protection, release the fixed connection between the flange of the rectangular bypass pipe with the two-way cutoff function and the flange of the existing bypass pipe, and seal the existing pipe After removing the lug and the existing bypass pipe, and after confirming the installation, the bottom of the new manhole is finished in a reverse arch shape to build the invert, and after the invert construction is completed, after proper curing, the new pipe A bypass construction method with a two-way cutoff function, comprising: an eighth step of removing the seal plug, the newly installed bypass pipe and the rectangular bypass pipe with a two-way cutoff function, and backfilling the shaft to complete the construction.

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