JP2001082673A - Repairing method of conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair and reclaim an existing pipe in a state of separating a place for man to work at and a place to drain from each other without drilling open, without unwatering and without stopping a flow in an existing sewerage pipe for a long period of time. SOLUTION: A water stop plug 1 having a valve function inside is arranged in the vicinity of a manhole. H1 positioned on the, upstream side of a repairing objective conduit, sewerage, water is sulfurized inside of a cylinder body 2 at least in the, manhole. H1 by installing the cylinder body 2 on an end part of the downstream side, a separated region W where sewerage water does not flow is formed on an outer periphery of the cylinder body 2, and it is made possible to carry out lining of an inner surface of an existing conduit without touching sewerage. water only by temporarily stopping sewerage water by assembling an assembly type lining material in the separated region W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an existing sewer pipe,
Or rainwater, about the repair method of agricultural water pipes, etc., in more detail, when repairing a large-diameter sewer pipe with a diameter of 800 mm or more that allows people to enter the pipe and work, without stopping the flow of sewer in the sewer, Secure a work place in the sewer pipeline for assembling the lining material that is isolated from the sewer, and easily repair the sewer pipeline with a high flow rate or a large amount of water while ensuring safety. The present invention relates to a pipe repair method that can be performed.

[0002]

2. Description of the Related Art Conventionally, as a method of repairing a large-diameter sewer pipe without cutting, a soft lining method in which a hose-shaped or tube-shaped flexible lining material is inserted into the pipe by inversion or drawing in, or a chlorination method has been used. There is known a method of spirally winding a vinyl band profile in a tube to form a tube, or a method of forming a tube by fusing a resin plate in the tube.

[0003] In the soft lining method in which a flexible lining material is inserted into an existing pipe by inversion, drawing, or the like, a lining plug is installed in a sewer pipe to be repaired and the flow of sewage is stopped. It is common to change the water on the ground by turning the bypass hose.

[0004] In the method of forming a band-shaped profile in a pipe or in the method of forming a resin plate in a pipe, a method in which a person enters the pipe to make a pipe, and a method in which a pipe-making machine is brought into the pipe. is there. In the construction method where humans enter the pipe and make pipes,
If the flow of sewage is large, work is dangerous, and work cannot be performed unless the flow is stopped. In addition, even if the flow of sewage is stopped, it is often impossible due to the flow rate. On the other hand, it is said that the construction method of bringing the pipe making machine into the pipe can be performed without stopping the flow of sewage, but in actuality, there is a place where the flow of sewage is fast and the water depth is about one third or more of the pipe By the way, construction itself is impossible. In other words, if an attempt is made to bring a pipe-making device into a place where the flow velocity is high, the fact is that the device acts as a weir and raises the water surface on the upstream side, making it impossible to perform work.

[0005] As a method of repairing an existing sewer pipe, the present applicant has proposed a water stop having a valve function that can be opened and closed on the inner peripheral side at a portion upstream of a manhole on the upstream side of the pipe to be repaired. With the plug inserted, the valve function of the water stop plug closed, and the water stopped, a bypass pipe is inserted into the existing pipe, the base end is connected to the water stop plug, and the distal end of the bypass pipe is connected. After reaching and supporting the downstream portion of the manhole on the downstream side of the pipeline to be repaired, by opening the valve function of the water stop plug, the sewage flows only between the two manholes in the bypass pipe, A method of assembling a lining material on the inner surface of an existing pipe in a state in which sewage does not flow in an annular space between the bypass pipe and the existing pipe has been proposed (JP-A-10-141574).

[0006]

[Problems to be Solved by the Invention] It is said that the sewerage system in Japan has spread after the war, but the concrete which has passed 50 years, which is said to be the service life of concrete, has begun to appear in large cities. Has been cracked and slipped due to earthquake and land subsidence. In addition, concrete undergoes a chemical reaction due to hydrogen sulfide generated in sewage and sulfuric acid changed from hydrogen sulfide, and deterioration of the inner surface is progressing. In order to cope with such a problem, a pipe rehabilitation method of lining the inner surface of a sewer pipe with a thermosetting resin having excellent chemical resistance has been adopted.

However, in the case of a large-diameter pipe, the amount of water is large and water cannot be physically changed. As described in the previous section, a method of assembling a new pipe in a sewer without changing water has also been proposed, but also includes a method in which the flow velocity is high in any case, including the above-mentioned proposal by the present applicant. The work involves the danger of being trapped in the flow, and involves a major problem in terms of safety.

[0008] From the above, in reality, the rehabilitation of large-diameter sewer pipes has not been touched. Also,
Since a considerable cost is required for adopting the rehabilitation method, a rehabilitation method that makes the rehabilitated pipe a durable and high-strength pipe is strongly desired as a repair method.

The present invention has been made in view of such circumstances, and a main object of the present invention is to eliminate the need for excavation, without stopping the flow of existing sewer pipes, and without changing water. The purpose of the present invention is to provide a method for repairing pipes that can repair existing pipes and rehabilitate them while keeping work from being carried out from the sewage stream. It is an object of the present invention to provide a method for repairing a pipeline, which can greatly increase the strength as compared with the related art.

[0010]

In order to achieve the above-mentioned object, a method for repairing a pipeline according to the present invention is a method for repairing an existing pipeline, the method being provided near a manhole located upstream of a pipeline to be repaired. Then, in the upstream pipe, a water-stop plug having an outer periphery abutting against the inner surface of the pipe in a watertight manner and having an openable and closable valve function is arranged on the inner circumference, and At the downstream end, by attaching the cylinder at a position that can be inserted through a substantially uniform gap in the circumferential direction with respect to the inner surface of the pipe to be repaired, sewage flows down at least in the manhole inside the cylinder. Then, it is characterized by assembling an assembly type lining material in an isolation region for sewage formed on the outer periphery of the cylindrical body (claim 1).

Here, in the present invention, as the above-mentioned assembling type lining material, a lining surface material composed of one or more resin plates and a lining surface material provided between the lining surface material and the existing pipe inner surface are provided. What consists of a metal reinforcing material integrated with a lining surface material can be suitably adopted (claim 2).

According to the present invention, in consideration of the structure of an existing sewer pipe including a manhole, when repairing a large-diameter sewer pipe,
In order to pass through the vertical straight part of the manhole without digging, the method of assembling the lining material in the existing pipeline is adopted, and the work of assembling the lining material in the pipeline is performed by the flow of sewage in the pipeline. Without stopping and without changing water, and in a state separated from sewage.

That is, a manhole cover in a sewer system is generally 600 mm in size. In the case of the first person hole (manhole), the diameter of the straight portion in the vertical direction below the lid is 900 mm, and in the case of a large-diameter sewer, a large space below the first person hole. Many are constructing structures with For this reason, when working in a manhole, the diameter is 9 mm even if the diameter of the manhole is 600 mm or the manhole cover is removed.
The fact is that only equipment and materials that pass through 00 mm can be inserted into sewer pipes. In the case of a large-diameter pipe culvert, even if only the manhole is cut open, the burial depth is deep, so it will be a serious work.

According to the present invention, in consideration of the structure of the existing pipe and the manhole, even a large diameter pipe having a diameter of several meters can be inserted into a pipe having a diameter of at most 900 mm. Therefore, the lining material covering the inner peripheral surface of the existing pipe is of an assembling type, and the assembling lining material is assembled in the existing pipe to line the inner surface of the existing pipe. And, in order to enable the assembling work to be performed in a region isolated from sewage, a water stop plug having a valve function that can be opened and closed on the inner peripheral side, and a downstream end face portion of the water stop plug And a sewage isolation device consisting of a cylindrical body which is attached to the inner pipe of the existing pipe and is disposed with a substantially uniform gap in the circumferential direction with respect to the inner peripheral surface of the existing pipe.

[0015] The water-stop plug is mounted near the manhole located on the upstream side of the pipe to be repaired with its outer periphery watertight against the inner surface of the existing pipe, and closing the valve function on the inner periphery to stop sewage. In this state, after attaching the cylinder to the downstream end face, the valve function is opened to allow the sewage to flow down inside the cylinder, and the sewage flows between the outer periphery of the cylinder and the inner periphery of the existing pipe. Form voids, ie, areas isolated from sewage. Then, while assembling the assembling-type lining material in the tubular isolation region into a tubular shape, the required number of the assemblies are sequentially joined in the axial direction and extended downstream, so that the lining material assembling work can be performed. It can be carried out without changing the water, without stopping the flow of the sewage, and without touching the sewage in the existing pipe. Therefore, even in a sewer with a high flow rate or a large amount of water,
The tube can be rehabilitated without the danger of being trapped in the flow.

Here, in the method of the present invention, the time during which the valve function on the inner peripheral side of the water stop plug is closed and the flow of the sewage is stopped is determined by placing the cylinder downstream of the water stop plug in order to isolate the sewage. The time required for installation is sufficient, and during this time, the sewer pipe upstream of the water stop plug works as a water storage tank, but after examining how far the sewer can be used as a water storage sewer, the valve function It is necessary to determine the occlusion time.

Further, when assembling the lining material into a tubular shape and joining the assembly in the axial direction and extending it downstream, it is necessary to move the previously assembled tubular assembly downstream. However, since the sewage flows along the inner surface of the existing pipe downstream of the sewage isolation device cylinder, this sewage flow gives buoyancy to the assembly, and the flow Since it acts as a force for moving the three-dimensional object, there is also an advantage that the force required for moving the assembly is small.

According to the second aspect of the present invention, there is provided a lining material provided with a lining surface made of one or more resin plates and a ring-shaped metal reinforcing material integrated with an outer peripheral side thereof. When used, the ring-shaped metal reinforcement becomes a strength member in the circumferential direction, withstands the injection pressure when injecting a backfill material such as mortar between the resin surface material and the existing pipe, and after lining Since it plays a role against external water pressure or earth pressure, the strength of the pipe after rehabilitation can be greatly improved as compared with the conventional rehabilitation method. Then, if polyethylene or the like is selected as the material of the resin lining surface material, a long life sewer pipe having excellent strength and chemical resistance can be obtained.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the description, first, examples of devices and members used in a method of rehabilitating a sewer pipe to which the method of the present invention is applied will be described, and then a rehabilitation procedure of a pipeline will be described.

FIG. 1 is a schematic sectional view showing the entire structure of a water stop plug 1 used for repairing a sewer pipe to which the method of the present invention is applied, and shows a state where the plug is installed in an existing sewer pipe P. . FIG. 2 is an enlarged view showing a detailed structure of a portion A in FIG. 1, and FIG. 3 is an enlarged sectional view taken on line BB in FIG.

The water stop plug 1 in this example has a valve function that can be opened and closed at the center thereof, and includes a plug body 11 made of a metal cylinder and a plug body 11.
The outer seal 12 and the inner seal 13 provided on the outer peripheral surface and the inner peripheral surface, respectively, are mainly constituted. In this example, the plug body 11 is
Six segments 11a to 11f, each of which is divided and each of which can pass the diameter 900 mm of the straight portion SH of the manhole H, are combined in a cylindrical shape, and the fixing members 11g are screwed to both end surfaces thereof to secure each segment 11a. To 11f are integrated with each other. The fixing member 11g is also divided into a suitable number in the circumferential direction, and has a diameter 900 of the straight portion SH of the manhole H.
mm, and the joining position of the fixing member 11g in the circumferential direction is set to the segments 11a to 11g.
11f, each segment 11a-
By screwing the plug body 11f on the plug body 11, the plug body 11 composed of a cylindrical body as a whole is formed.

The outer seal 12 includes five donut-shaped flat hoses 12a to 12a along the outer peripheral surface of the plug body 11.
12e and an outer bag 12f that wraps these from the outside, and the outer bag 12f is
It is fixed to the plug body 11 by g. The donut-shaped flat hoses 12a to 12e are fixed in the outer bag 12f so that their mutual positions do not shift. And in each donut-shaped flat hose 12a-12e,
Air can be individually supplied to the inside of the plug main body 11 through an air passage (not shown) provided in the plug main body 11, and each of the donut-shaped flat hoses 12a to 12
e to inflate the outer bag 12
f is configured to contact the inner surface of the existing sewer pipe P in a watertight manner.

The inner seal 13 is in the shape of a hose itself, and has both ends opened in an arc shape with respect to both ends in the axial direction of the inner peripheral surface of the segment 11a located at the upper center of the plug body 11. Bolt 1 via metal fitting 13a
3b, which is tightly tightened and hermetically fixed to form a bag. Air can be supplied to the inside of the segment 11a through an air passage (not shown) provided in the segment 11a. By supplying air to the inner seal 13 and inflating the inner seal 13, the inner seal 13 tightly adheres to the inner peripheral surface of the plug main body 11 as shown by a broken line in FIG. It is configured to be able to.

The length of the inner seal 13 in the axial direction of the plug main body 11 is longer than the axial length of the plug main body 11 itself in consideration of the form of expansion when air is supplied. . Also, this inner seal 13
At the time of non-use, the air inside is sucked in consideration of handleability, and is in close contact with the segment 11a in a folded state as shown in FIGS. In addition, the inside of the plug body 11 is opened by removing air from the state in which the inside of the plug body 11 is closed by supplying air to the inner seal 13. The air in the inner seal 13 is actively suctioned through the air passage described above,
By drawing the inner seal 13 to the segment 11a, the sewage quickly resumes flowing down without obstructing its flow.

As shown in a schematic vertical sectional view of FIG. 4, the water-stop plug 1 is attached to the existing sewer pipe P and has a sewage isolation tubular body 2 attached to the downstream end face thereof. Are attached, and these constitute the sewage isolation device 3.

In this example, the sewage isolation cylinder 2 has a cylindrical shape as a whole corresponding to the sewer pipe P having a circular cross section, and a body 21 having a flange 21a at one end, and a body 21 having a flange 21a. It is mainly composed of a tubular water-impervious sheet 22 which is attached to the inner peripheral surface of the body portion 21 via a holding member 22a. Body portion 2 including flange portion 21a
1 is the diameter 900 of the straight part SH of the manhole H
For example, it is divided into eight in the circumferential direction so as to pass through mm, and the divided members are assembled into a manhole H or an existing sewer pipe P connected to the manhole H to form a cylindrical body with a flange. The assembling into the cylindrical body is performed by screwing each of the divided members to an assembling ring which is disposed at an appropriate distance from each other inside the body 21. In addition, this trunk | drum 21 may be divided | segmented also in an axial direction as needed and connected. In this operation, the scaffold F may be assembled in the manhole H as necessary.

As shown in FIG. 4, the sewage isolation tubular body 2 is attached to the downstream end surface of the plug body 11 of the water stop plug 1 at the flange 21a. In this state, a substantially constant gap is opened in the circumferential direction between the outer peripheral surface of the sewage isolation tubular body 2 and the inner peripheral surface of the existing sewer pipe P. Then, by opening the inner seal 13 of the water stop plug 1 in this state, the sewage flowing down from the upstream of the water stop plug 1 flows inside the sewage isolation cylinder 2, and the existing sewer pipe P The sewage does not flow through the cylindrical gap formed on the inner peripheral surface of the sewage and the outer peripheral surface of the sewage isolation cylindrical body 2, and an isolation region W for the sewage is formed. In order to prevent the sewage isolation tubular body 2 from becoming cantilevered with respect to the water blocking plug 1, it is desirable to attach wheels 23 to the downstream end as necessary. The wheel 23 comes into rolling contact with the inner surface side of an assembly type lining material to be described later to reduce the resistance when the lining material moves in the axial direction.

Next, an assembly type lining material used in a method of rehabilitating a sewer pipe to which the present invention is applied will be described.
FIG. 5 shows an example. FIG. 5 is an external view showing one assembled unit of the lining material, that is, an assembled state of the assembled lining unit 4, and FIG.
FIG. 3 is a cross-sectional view taken along the axis orthogonal to FIG. FIGS. 7 to 9 are views showing parts constituting the assembly type lining unit 4.

The assembly type lining unit 4 in this example has a resin plate 41 forming a lining surface material, and a cylindrical shape that is formed so that both ends of the resin plate 41 abut against each other. The main constituent elements are a cylindrical longitudinal direction fusion material 42 to be connected and a plurality of rigid rings 43 provided on the outer periphery of a resin plate 41 rounded into a cylindrical shape.

The resin plate 41 has, for example, a molecular density of 0.95.
As shown in a perspective view in FIG. 7, a high-density polyethylene material having a degree of high-density polyethylene is formed on the back surface (the surface facing the inner surface of the existing sewer pipe P at the time of lining). A large number of ribs 41a are formed along each of the ribs 41a.
1b is formed.

The cylinder length direction fusion material 42 is made of polyethylene, and as shown in FIG.
Concave portions 42a into which both end portions of the resin plate 41 are fitted are formed on both side surfaces thereof, and have a structure in which a nichrome wire 42b for heat fusion is embedded adjacent to each concave portion 42a. When the resin plate 41 is rolled into a cylindrical shape and joined, both ends are inserted into the concave portions 42a on both sides of the tube lengthwise fusion material 42, and a current is applied to the nichrome wire 42b to form the tube lengthwise fusion material 42. A so-called electric fusion bonding type in which polyethylene is melted by heating and fused and integrated with the resin plate 41 is employed.

As shown in a partial sectional front view of FIG. 9, each rigid ring 43 is divided into four circumferentially divided ring members 43a to 43d made of structural steel or the like, and each of the divided ring members 43a to 43d. 43d is formed by a rigid ring connecting member 43e for connecting the 43d to each other to form a ring. The rigid ring connecting member 43e is a pipe-shaped member made of the same material as each of the split ring members 43a to 43d.
By inserting the ends of a to 43d, the four split ring members 43a to 43d are formed by a knock type retaining mechanism or the like.
43d are joined in the circumferential direction.

To assemble the assembling lining unit 4 using the above-described members, the resin plate 41 is wound, and both ends thereof are inserted into the concave portions 42a of the tube longitudinal direction fusion material 42 to form a cylindrical shape. 42b and the holes 41 of the ribs 41a located on the outer periphery in this state.
The divided ring members 43a to 43d are passed through b, and the divided ring members 43a to 43d are annularly connected to each other by the rigid ring connecting member 43e to be integrated with the resin plate 41.

The plurality of assembled lining units 4 are joined to each other in the axial direction (the length of the cylinder) so that the entire length thereof matches the length of the portion of the existing sewer pipe to be repaired. I have. That is, as shown in FIG. 10, each of the assembling lining units 4 assembled into a cylindrical shape is joined to each other by the end face fusion material 5, and the assembling lining units 4 are assembled in the joined state. The rigid rings 43 closest to the joint position in the unit 4 are integrated by being connected by the rigid ring connecting member 6 at a plurality of locations in the circumferential direction.

As shown in the external view of FIG. 11, the end face fusion material 5 has a ring shape as a whole, and its main body can be bent to follow the slack of the sewer pipe and some curves. Flexible material, eg with a molecular density of 0.95
3, a concave portion 5a for inserting an end portion of the resin plate 41 wound into a cylindrical shape of the assembling lining unit 4 is formed at both ends thereof, and the entire circumference thereof is formed. Nichrome wire 5b for heating through
Are embedded.

The rigid ring connecting member 6 is made of structural steel equivalent to the split ring members 43a to 43e. As shown in the external view of FIG.
3 is formed with a notch 6a to be fitted therein and a slide groove 6b adjacent to the cutout 6a, and a potting process for locking is performed, and a slide bar 6c slides in each slide groove 6b. It is freely and rotatably supported. In order to connect the rigid rings 43 of the assembled assembled lining unit 4 to each other, the slide bars 6c are slid from the state shown in FIG. After the fitting, the slide bar 6c may be returned to the original position so that the rigid ring connecting member 6 cannot be detached from each rigid ring 43.

Next, an example of a method of repairing an existing sewer pipe to which the method of the present invention is applied by using the above-mentioned sewage segregation device 3 and the assembly type lining unit 4 will be described. FIG.
3 to 15 are schematic longitudinal sectional views for explaining the procedure of repair work of a sewer pipe to which the method of the present invention is applied. Here, in order to make the explanation easy to understand, a case of rehabilitating a sewer sewer with a diameter of 2000 mm will be described.

First, as shown in FIG.
Water stop plug including segments 11a to 11f inside
The scaffold (Fig.
(Not shown), assemble the water stop plug 1
1 is the sewer pipe P to be repaired ₀Man located upstream of
Hall H₁Close to and upstream of it. This and
The water stop plug 1 is connected to the wire 7 from the manhole H on the upstream side.
a to the take-off machine 7b via the
An assignment is made. Supplement for sewer pipes with a diameter of 2000 mm
The dimensional specifications of the water stop plug 1 for repair
Outer diameter of plug body 11 is 1750 mm, length 22
It is about 00 mm.

Next, the outer seal 12 of the water stop plug 1
By introducing compressed air into each of the donut-shaped flat hoses 12a to 12e, the water stop plug 1 is fixed to the inner surface of the existing sewer pipe P in a watertight manner. The compressed air pressure at this time is usually about ² kgf / cm ² .

Thereafter, the inner seal 1 of the water stop plug 1
Compressed air is introduced into 3, and the center of water stop plug 1 is closed. Thus, sewage flowing through the existing sewer pipe P is blocked upstream of sewerage P ₀ repair target.
In this state, attached to the end face of the downstream side of the water stop plugs 1 together with the manhole H ₁ by inserting the components of the sewage isolating accommodating cylinder 2 assembled sewage isolating cylindrical body 2, FIG. 4
The sewage isolation device 3 is completed as shown in FIG. The axial length of the sewage isolating cylindrical body 2 is longer than the length of the invert portion of the manhole H _1, and approximately 3000 mm. The compressed air supplied to the inner seal 13 is usually 1 kg.
It is about f / cm ² .

Next, the inner seal 13 of the water stop plug 1
The central part of the water stop plug 1 is opened by sucking the air inside. As a result, the sewage flowing through the existing sewer pipe P flows inside the sewage isolation tubular body 2 through the central portion of the water stop plug 1, flows out from the downstream open end of the tubular body 2, and returns to the existing sewage pipe again. Return to the pipe P (the sewer pipe P _{0 to be} repaired). That is, in this state, sewage does not flow in the cylindrical gap between the outer peripheral surface of the sewage isolation tubular body 2 and the inner peripheral surface of the existing sewer pipe P, and an isolation region W for sewage is formed.

[0042] Then, by inserting the components of the assembled lining unit 4 from the manhole H _1, assembled into a cylindrical shape in the isolated region W for sewage. An example of dimensional specifications of the assembly type lining unit 4 is as follows.
1 has a length of 5500 mm, a width of 850 mm, a thickness of about 3 mm as a flat plate, and a rib 41 a having a thickness of 8 mm and a height of 4
0 mm, length 750 mm, mutual pitch is 100 mm, and hole 41b has a diameter of 28 mm. The thickness of the rigid ring 43 is about 26 mm. And the resin plate 41
Is assembled into a cylindrical shape to complete the assembling lining unit 4, the inner diameter of which is 1850 mm.

Assembling of the above assembly type lining unit 4
While repeating the operation, the end face fusion bonding material 5 and the rigid ring
A plurality of prefabricated lining units 4 using the connecting member 6
Are joined in the axial direction. Assembling type lining unit 4
Each time they are joined in the axial direction, as shown in FIG.
A plurality of prefabricated lining units 4 joined to
Sewer pipe P for repair₀Manhole H on the downstream side of_TwoFrom
Take-off machine 8b via wire 8a inserted in advance
, Sewer pipes P to be repaired ₀Inserted in
I will enter. In this way, the prefabricated lining unit
As the pipes 4 are sequentially joined in the axial direction, the water stop plug 1
Through the inner seal 13 in the open state for sewer isolation
The sewage flowing inside the cylindrical body 2 is
Flow through the inside of the operating unit 4 and
Water pipe P₀State.

Here, when the assembling lining units 4 are heated and fused by the end face fusion material 5 and are joined in the axial direction, the sewage is flowed under the above-described flow path. In some cases, there is a problem that the heating temperature is hardly increased. In such a case, it is preferable to supply compressed air into the inner seal 13 of the water stop plug 1 to temporarily stop the flow of the sewage. In addition, at the location where the assembling type lining unit 4 is fused by the cylinder length direction fusion material 42 and the end face fusion material 5,
It is preferable to perform fusion with a fusion gun to ensure that the water stops at the joint.

[0045] Now, by that repeating the operations described above, as shown in FIG. 15, spanning the entire length of the sewer pipe P ₀ of the repair target, lining material 40 comprising a required number of prefabricated lining unit 4 is formed . Thereafter, as shown in the figure, fitted with a wife formwork 9 between the existing sewer pipe P ₀ of the repaired object at both ends of the lining material 40, the mortar between the existing sewer pipe P ₀ and the lining material 40 And finish the repair work.

Here, in the above process, when the flow of the sewage is stopped by the water stop plug 1, in order to withstand the static pressure, the dynamic pressure and the pressure considering the water hammer, pipes are formed on the wall of the manhole. If a water escape plug 1 is fixed to the preventive device by installing a support or hitting an anchor, for example, by hitting an anchor, it is possible to prevent the water stop plug 1 from coming off (flow), which is safer. . When it is determined that the connection of the sewage isolation cylinder 2 with the waterproof plug 1 is not sufficient for safety, it is preferable that the sewage isolation cylinder 2 be fixed to the above-described plug removal prevention tool.

In the above embodiment, a plurality of independent donut-shaped flat hoses 12a to 12e are used as the outer seal 12 of the water blocking plug 1 so that air leaks to any one of the hoses. Although the watertight plug 1 used in the method of the present invention is not limited to such a structure, for example, one flat hose having a diameter of about 1200 mm is connected to a flat hose by using a ring. The shape may be used as the outer seal 12. Further, the inner seal 13 of the water stop plug 1 is not limited to the above-described embodiment, but may have a structure in which both ends of a different-diameter tube are fixed to the segment 11a.

Further, the structure of the lining material is not limited to the structure used in the above embodiment. That is, for example, only the resin plate 41 may be used without using the rigid ring 43, or a plurality of resin plates such as strips may be flexibly connected instead of winding one resin plate 41 in a cylindrical shape. It is possible to adopt a structure in which a combined product is prepared and is wound in a cylindrical shape in a manhole. Further, the material of the resin plate 41 is not limited to high-density polyethylene, but is, for example, a rigid vinyl chloride resin, a polyethylene terephthalate resin, a nylon resin, a polypropylene, a vinylidene fluoride resin, or the like having a suitable rigidity. You can choose. Also, at that time, the method of the cylinder length direction fusing material 42 for joining the butted portions of the resin plate 41 and the end face fusing material 5 for joining the assembly type lining units 4 also changes. An adhesive or the like can also be used.

The back mold 9 used in the above embodiment in the backing process for the lining material 40 is exemplified as a general method. It doesn't matter. In addition, a suitable thermosetting resin such as resin mortar, epoxy resin, or vinyl ester resin can be used as the backfill material instead of mortar.

Further, in the above embodiment, the case where the existing sewer pipe has a circular cross section has been described. However, the present invention is not limited to this, and may be applied to a rectangular culvert (box culvert) or a horseshoe culvert (arch culvert). In this case, the shapes of the lining material, the water stop plug and the sewage isolation cylinder may be adjusted to the sectional shape of the sewer pipe.

[0051]

As described above, according to the present invention, a water stop plug having an openable and closable valve function is arranged so that the outer periphery thereof is watertight with respect to the inner surface of an existing sewer pipe. Attach a sewage isolation cylinder to the downstream end of the water stop plug, and configure a sewage isolation device with them.
An area where sewage does not flow, that is, an isolation area for sewage is formed between the outer peripheral surface of the sewage isolation cylinder and the inner peripheral surface of the existing sewer pipe, and an assembling type lining material is assembled in the isolation area. Since the individual pieces are joined in the axial direction and are sequentially extended downstream, there is no need for excavation and no need to change the water, and the sewage is only temporarily stopped without stopping the sewage through the pipeline repair process Thus, large-diameter sewer pipes can be repaired. Further, since the work in the sewer is performed in an area isolated from the sewer, there is no danger that the worker falls into the flow of the sewer, and the safety is greatly improved as compared with the conventional method.

As the lining material, a resinous lining surface material and a metal reinforcing ring (rigid ring) disposed between the surface material and the existing sewer pipe and integrated with the lining surface material are used. If such a material is employed, a high-strength lining that can sufficiently withstand the external water pressure and the earth pressure can be realized, and the durability of the sewer pipe after the repair can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of a water blocking plug 1 used in an embodiment of the present invention.

FIG. 2 is an enlarged view showing a detailed structure of a portion A in FIG. 1;

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is a schematic cross-sectional view showing a configuration of a sewage isolation device 3 including a water stop plug 1 and a sewage isolation cylinder 2 used in the embodiment of the present invention.

FIG. 5 is an external view of a prefabricated lining unit 4 used in the embodiment of the present invention.

FIG. 6 is a cross-sectional view perpendicular to the axis of the assembled lining unit 4 of FIG.

7 is an external perspective view of a resin plate 41, which is a component of the assembling lining unit 4 of FIG.

8 is a partially omitted external perspective view of a cylindrical longitudinal fusion material 42, which is a component of the assembling lining unit 4 of FIG.

FIG. 9 is a partial cross-sectional front view of a rigid ring 43, which is a component of the assembling lining unit 4 of FIG.

FIG. 10 is an external view showing the assembled lining units 4 used in the embodiment of the present invention in a state where they are joined to each other by end faces.

FIG. 11 is an external view of an end face fusion bonding material 5 used when joining the end faces of the assembling lining unit 4 to each other.

FIG. 12 is an external view of a rigid ring connecting member 6 used when joining the end faces of the assembling lining unit 4 similarly.

13 is an explanatory view of a procedure of a method of rehabilitating an existing sewer pipe according to an embodiment of the present invention, and is a cross-sectional view showing a state in which a water stop plug 1 is inserted into an existing sewer pipe P. FIG.

FIG. 14 is an explanatory view of a procedure of a method of rehabilitating an existing sewerage line according to an embodiment of the present invention, in which two assembled lining units 4 assembled in an isolation region W for sewage by an sewage isolation device 3 are axially mounted. It is sectional drawing which shows the state which joined.

[15] Also in step illustration of rehabilitation method of the existing sewerage line according to the embodiment of the present invention, in the existing sewer pipe P ₀ of the repair target, therewith a plurality of prefabricated lining unit 4 by the same length It is sectional drawing which shows the state which inserts the joined lining material 40, arranges the end form 9 at the both ends, and performs backfilling.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Water stop plug 11 Plug main body 11a-11f Segment 12 Outer seal 13 Inner seal 2 Sewage isolation cylinder 3 Sewage isolation device 4 Assembling type lining unit 41 Resin plate 42 Cylinder longitudinal fusion material 43 Rigid ring 40 Lining material 5 End face Fusing material 6 Rigid ring connecting material 9 Wife form P Existing sewer pipe P ₀ Existing sewer pipe to be repaired H, H ₁ , H ₂ Manhole SH Vertical straight part in manhole W Separation area for sewage

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Futoshi Makimoto 511-10 Inaya, Kakogawa-cho, Kakogawa-shi, Hyogo F-term (reference) 3H025 DA02 DB19 DB19 DC02 DD01

Claims (2)

[Claims] 1. A method of repairing an existing pipeline, comprising: a manhole located upstream of a pipeline to be repaired; In addition, a water stop plug having a valve function that can be opened and closed is arranged on the inner periphery, and at the downstream end of the water stop plug, a substantially uniform circumferential direction with respect to the inner surface of the pipe to be repaired. By attaching the cylinder at a position that can be inserted through the gap, the sewage flows down at least in the manhole inside the cylinder, and in the isolation region for sewage formed on the outer periphery of the cylinder, the assembled lining material is A method of repairing a pipeline characterized by being assembled. 2. A lining surface material comprising one or more resin plates, and the lining material is provided between the lining surface material and an inner surface of an existing pipe, and is integrated with the lining surface material. The method for repairing a pipeline according to claim 1, further comprising a ring-shaped metal reinforcing material to be repaired.