JP6802563B2 - Fixing tool for rehabilitation pipe and fixing tool for rehabilitation pipe - Google Patents

Description

The present invention relates to a fixing tool for a rehabilitation pipe to be inserted and laid in an existing old water supply / drainage pipe connected to a manhole, and an improvement in a method for laying a fixing tool for the rehabilitation pipe.

Conventionally, seismic rehabilitation pipes and seismic retrofitting methods for pipes including manholes have been proposed and actually implemented. As one proposal, Patent Document 1 states that in a seismic retrofitting pipe in which a seismic layer is provided on the entire circumference of a water supply / drainage pipe 21 made of a clay pipe or a hume pipe including a manhole, a predetermined range of the inner peripheral surface of the pipe in the cylindrical direction is provided. A seismic retrofitting pipe is disclosed in which a quick-drying resin having elasticity is laminated on the entire circumference by spraying, and a peeling prevention means 22 is configured at an end portion. With such a configuration, it is possible to provide a seismic retrofitting pipe in which the ends of the reinforcing portions laminated by spraying are prevented from peeling off.

Japanese Unexamined Patent Publication No. 2016-53262 (see FIG. 4)

However, in such a configuration, only a seismic retrofitting pipe having improved seismic performance is provided by installing a seismic layer on the entire circumference of the existing water supply / drainage pipe.

That is, according to the above-mentioned prior art, a quick-drying resin having elasticity is laminated by spraying on the entire circumference of the inner peripheral surface of the pipe in a predetermined range in the cylindrical direction, and the end face of the sprayed laminated portion is formed by the fluid flowing in the pipe. It is fixed with a metal band so that it will not be peeled off.

In this conventional example, the construction can be carried out without any problem when the construction construction section is short, but the construction is difficult when the construction construction section extends over a long distance, but no disclosure is made regarding that point. ..

In general, pipes with a diameter of 50 to 100 cm are used for the supply and drainage of irrigation water, sewerage, irrigation natural gas, industrial water, etc., so repair methods are limited. In addition, long-distance water supply and drainage pipes are laid, with the distance between two adjacent manholes ranging from tens of meters to hundreds of meters.

If damage such as pinholes or damage occurs in such an existing water supply / drainage pipe several decades after installation, paint can be sprayed to rehabilitate the water supply / drainage pipe that has been laid over a long distance. It cannot be dealt with, and a new rehabilitation pipe will be laid on the inner surface of the water supply and drainage pipe. In such a case, when laying the rehabilitation pipe, simply laying the rehabilitation pipe and applying an adhesive to the inner joint cannot maintain the state at the time of the completion of the laying work, and it has been several years to several decades. Due to the change, expansion and contraction peeling easily occurs from the end of the rehabilitation tube, and it becomes impossible to maintain a complete rehabilitation state.

Specifically, the test section of the two manholes conducted by the applicant was 50 meters, and the work was done simply by laying a new rehabilitation pipe on the inner surface of the water supply and drainage pipe and applying adhesive when the laying work was completed. At the end, the rehabilitated tube contracted by 0.1 N% (N is a natural number) due to aging, and peeling occurred from the end. Generally, the shrinkage rate published in this type of industry is shown to be 0.061% as a value 24 hours after work.

The length of the construction section planned in the future may exceed 250 meters, and if the section distance between the two manholes becomes long in this way, the initial state of construction completion cannot be maintained and damage due to contraction of the rehabilitation pipe will occur. May occur near the end and cause damage such as liquid leakage, which may interfere with the functions of the water supply / drainage pipe and the rehabilitation pipe.

In response to such a request, the present invention is a fixing tool for a rehabilitation pipe that does not peel off due to aging of the rehabilitation pipe even after several years to several decades have passed since the completion of the construction work when laying the rehabilitation pipe. The purpose is to propose a method for laying fixtures for rehabilitation pipes.

In order to achieve the above object, according to the invention of claim 1, in the fixture of the rehabilitation pipe to be inserted and laid in the pipe of the existing water supply / drainage pipe connected to the manhole, the outer peripheral surface of the rehabilitation pipe and the said An adhesive applied to the joint surface with the water supply / drainage pipe and peeling prevention means installed at both ends of the rehabilitation pipe are provided, and the rehabilitation pipe is pressed against the inner circumference of the water supply / drainage pipe by the peeling prevention means. It is characterized by that.

Further, according to the invention of claim 2, in the fixture of the rehabilitation pipe to be inserted and laid in the pipe of the existing water supply / drainage pipe connected to the manhole, the joint surface between the outer peripheral surface of the rehabilitation pipe and the water supply / drainage pipe. A metal band including a driving wedge installed at the end of the rehabilitation pipe is provided, and both ends of the rehabilitation pipe are pressed and fixed to the inner peripheral surface of the water supply / drainage pipe by the metal band. It is characterized in that it is configured to do so.

Further, according to the third aspect of the present invention, in the method of laying a fixture for a rehabilitation pipe to be inserted and laid in an existing water supply / drainage pipe connected to a manhole, the rehabilitation pipe is inserted into the water supply / drainage pipe. After applying an adhesive to the joint surface between the outer peripheral surface of the rehabilitation pipe and the water supply / drainage pipe and blowing air into the rehabilitation pipe to bring it into close contact with the inner circumference of the water supply / drainage pipe, the outer peripheral surfaces of both ends of the rehabilitation pipe are placed on the inner circumference of the water supply / drainage pipe. It is characterized in that a peeling prevention means is installed so as to be in pressure contact with the manhole.

Further, according to the invention of claim 4, in the method of laying a fixture for a rehabilitation pipe to be inserted and laid in an existing water supply / drainage pipe connected to a manhole, the rehabilitation pipe is inserted into the water supply / drainage pipe and described above. Adhesive is applied to the outer peripheral surface of the rehabilitation pipe and the joint surface between the water supply and drainage pipes, and air is blown into the rehabilitation pipe to bring it into close contact with the inner circumference of the water supply and drainage pipes, and then both ends of the rehabilitation pipe are formed by a metal band including a driving wedge. It is characterized in that the portion is configured to be fixed by pressure contact with the inner peripheral surface of the water supply / drainage pipe.

According to the first aspect of the present invention, in a fixture for a rehabilitation pipe to be inserted and laid in an existing water supply / drainage pipe connected to a manhole, the coating is applied to the outer peripheral surface of the rehabilitation pipe and the joint surface between the water supply / drainage pipe. It is possible to provide a structure in which the adhesive to be used and the peeling prevention means installed at both ends of the rehabilitation pipe are provided, and the rehabilitation pipe is pressed against the inner circumference of the water supply / drainage pipe by the peeling prevention means.

With such a configuration, that is, peeling prevention means are installed at both ends of the rehabilitation pipe, and the rehabilitation pipe is pressed against the inner circumference of the water supply / drainage pipe by the peeling prevention means, so that the rehabilitation pipe changes over time after laying. It is possible to provide a rehabilitation tube that prevents harmful effects such as peeling due to.

Further, according to the invention of claim 2, in the fixture of the rehabilitation pipe to be inserted and laid in the pipe of the existing water supply / drainage pipe connected to the manhole, the joint surface between the outer peripheral surface of the rehabilitation pipe and the water supply / drainage pipe. A metal band including a driving wedge to be installed at the end of the rehabilitation pipe is provided with an adhesive to be applied to the rehabilitation pipe, and both ends of the rehabilitation pipe are pressed and fixed to the inner peripheral surface of the water supply / drainage pipe by the metal band. A rehabilitation tube configured as described above can be provided.

With such a configuration, both ends of the rehabilitation pipe are pressed and fixed to the inner peripheral surface of the water supply / drainage pipe by a metal band including a driving wedge installed at the end of the rehabilitation pipe. It is possible to provide a rehabilitation pipe fixture that is securely fixed to the inner surface of an existing water supply / drainage pipe. Therefore, it is possible to provide a rehabilitation pipe that prevents adverse effects such as peeling due to aging of the rehabilitation pipe after laying.

Further, according to the third aspect of the present invention, in the method of laying a fixture for a rehabilitation pipe to be inserted and laid in an existing water supply / drainage pipe connected to a manhole, the rehabilitation pipe is inserted into the water supply / drainage pipe. After applying an adhesive to the joint surface between the outer peripheral surface of the rehabilitation pipe and the water supply / drainage pipe and blowing air into the rehabilitation pipe to bring it into close contact with the inner circumference of the water supply / drainage pipe, the outer peripheral surfaces of both ends of the rehabilitation pipe are placed on the inner circumference of the water supply / drainage pipe. It is possible to provide a method of laying a fixture for a rehabilitation pipe, which comprises installing a peeling prevention means so as to press contact with the pipe.

That is, it is possible to provide a method for laying a fixture for a rehabilitation pipe, which prevents adverse effects such as peeling due to aging of the rehabilitation pipe after laying with such a configuration.

Further, according to the invention of claim 4, in the method of laying a fixture for a rehabilitation pipe to be inserted and laid in an existing water supply / drainage pipe connected to a manhole, the rehabilitation pipe is inserted into the water supply / drainage pipe. An adhesive is applied to the outer peripheral surface of the rehabilitation pipe and the joint surface between the water supply and drainage pipes, and air is blown into the rehabilitation pipe to bring it into close contact with the inner circumference of the water supply and drainage pipes, and then both ends of the rehabilitation pipe are formed by a metal band including a driving wedge. It is possible to provide a method of laying a fixture for a rehabilitation pipe, which is configured to press and fix the portion to the inner peripheral surface of the water supply / drainage pipe.

According to such a configuration, the rehabilitation pipe is configured so that both ends of the rehabilitation pipe are pressed and fixed to the inner peripheral surface of the water supply / drainage pipe by a metal band including a driving wedge installed at the end of the rehabilitation pipe. Since it is a fixture laying method, it is possible to provide a rehabilitation pipe fixture that securely fixes the rehabilitation pipe to the inner surface of the existing water supply / drainage pipe. Then, it is possible to realize a method of laying a fixture for the rehabilitation pipe, which prevents adverse effects such as peeling due to aging of the rehabilitation pipe after laying.

It is sectional drawing of the state after laying the fixture of the rehabilitation pipe by one Embodiment of this invention. It is explanatory drawing of the metal band including the driving wedge used in one Embodiment of this invention. It is explanatory drawing of the construction method of laying the rehabilitation pipe used in one Embodiment of this invention. It is explanatory drawing of the seismic retrofitting pipe and the attachment band which sprayed the seismic layer on the whole circumference of the pipe of the water supply and drainage pipe by a conventional example.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a water supply / drainage pipe 21 is connected between two manholes H1 and H2 communicating with the ground GL, and the distance thereof may range from several tens of meters to several hundreds of meters. Conventionally, as the water supply / drainage pipe 21, a clay pipe, a hume pipe, or a vinyl chloride pipe has been used.

Further, a rehabilitation pipe T is laid on the inner surface of the water supply / drainage pipe 21, and the inner peripheral surface of the water supply / drainage pipe 21 and the outer peripheral surface of the rehabilitation pipe T are attached by the adhesive S. Here, as the material of the rehabilitation tube T, it is preferable to use an unsaturated polyester resin mainly containing styrene.

As shown in FIG. 2, at the end of the rehabilitation pipe T, metal bands 22, 23, 24 including a driving wedge 25 which is a peeling prevention means K are inserted into the gap 28 to insert the driving wedge 25 into the gap 28. Is attached to the inner surface of the water supply / drainage pipe 21 while being pressure-welded. The metal bands 22, 23, 24 including the driving wedge 25 configured as the peeling prevention means K and the adhesive S constitute the fixture in the present invention.

The peeling prevention means K is laid at both ends of the rehabilitation pipe T, and the peeling prevention means K is strongly pressed against the inner surface side of the water supply / drainage pipe 21 to ensure the peeling prevention effect, so that the water supply / drainage pipe 21 is damaged. It is important to take measures to prevent it. As a countermeasure, it is preferable that the peeling prevention means K is installed so that the end faces of the rehabilitation pipe T and the water supply / drainage pipe 21 are located on the inner surfaces of the manholes H1 and H2 as shown in FIG.

FIG. 3 shows a general method of inserting a rehabilitation pipe T (indicated as a rehabilitation material in the figure) from the manhole H1 side to the manhole H2 side, and shows the rehabilitation pipe T housed in a vehicle equipped with a reversing machine. After fixing one end to the upper part of the manhole H1 shown in FIG. 1, the rehabilitation pipe T is sequentially moved from the manhole H1 side to the manhole H2 side into the inside of the water supply / drainage pipe 21 by sending air from the compressor into the rehabilitation pipe T. Will be inserted.

In this case, in order to insert the rehabilitation pipe T from the entrance of the manhole H1 having the form shown in FIG. 1 to the entrance of the water supply / drainage pipe 21, a known insertion guide (not shown) is installed between the two in advance. The work proceeds while guiding the rehabilitation pipe T from the upper surface of the manhole H1 to the water supply / drainage pipe 21, and is inserted into the manhole H2 side.

In this way, when the rehabilitation pipe T is completely inserted into the water supply / drainage pipe 21 from the manhole H1 side to the manhole H2 side, both end portions of the rehabilitation pipe T are separated at positions slightly shorter than the end portions of the water supply / drainage pipe 21. Then, the adhesive S is injected into the gap between the rehabilitation pipe T and the end of the water supply / drainage pipe 21. An epoxy resin is used as the material of the adhesive S, which cures in response to water and strongly adheres the joint surfaces of the two.

Here, the adhesive S joins the rehabilitation pipe T and the water supply / drainage pipe 21 and covers the area P from the end of the rehabilitation pipe T to the end face of the water supply / drainage pipe 21 and the joints with the manholes H1 and H2. By applying the coating, the rehabilitation pipe T can be maintained in a perfect state for a long period of time by being constructed so that the fluid in the pipe does not enter through the gap between the two. Further, an adhesive is additionally applied to both ends of the peeling prevention means K and the region P from the end of the rehabilitation pipe T to the end face of the water supply / drainage pipe 21 to maintain a secure fixed state. Further, by applying the adhesive additionally in this way, it is possible to prevent liquid leakage from the rehabilitation pipe T, the water supply / drainage pipe 21, and the joint portions with the manholes H1 and H2.

That is, such construction work completes the connection between the rehabilitation pipe T and the water supply / drainage pipe 21, and it is possible to prevent the rehabilitation pipe T from peeling off due to the fluid in the pipe even after the construction is completed, and the rehabilitation pipe T becomes a manhole H1 due to aging. The harmful effect of contraction between the manhole H2 and the manhole H2 is eliminated, and the state at the end of construction can be maintained.

By the way, since both ends of the rehabilitation pipe T are restrained by the peeling prevention means K, the rehabilitation pipe T cannot shrink in the axial direction due to aging, but the dimensional change of that amount shrinks in the radial direction at the time of completion of construction. It is presumed that the state of is maintained.

In the embodiment shown in FIG. 1, the peeling prevention means K is installed so that the end faces of the rehabilitation pipe T and the water supply / drainage pipe 21 are located on the inner surfaces of the manholes H1 and H2, and the peeling prevention means K is strongly used as the water supply / drainage pipe. Even when pressure is applied to the inner surface side of 21, the manholes H1 and H2 receive the water supply and drainage pipes 21, so that the rehabilitation pipe T can be strongly joined to the water supply and drainage pipes 21 without damaging the water supply and drainage pipes 21. The peeling prevention effect can be ensured.

As described above, the fixing tool for the rehabilitation pipe T and the fixing tool for the rehabilitation pipe T according to the present invention are rehabilitated even after several years to several decades have passed after the completion of the construction work when laying the rehabilitation pipe T. It is possible to propose a fixture and a fixture laying method in which the end of the tube T does not peel off due to aging.

The invention of the present application is not limited to the above-described embodiment, and the embodiment can be appropriately changed and implemented within the scope of the technical idea of the present invention.

21 ... Water supply / drainage pipe 22 ... Sealing band 23 ... Sealing band 24 ... Sealing band 25 ... Driving wedge K ... Peeling prevention means (22, 23, 24, 25)
H1, H2 ... Manhole S ... Adhesive T ... Rehabilitation tube

Claims (4)

In the fixture of the rehabilitation pipe to be laid by inserting it into the pipe of the existing water supply and drainage pipe connected to the manhole
An adhesive applied to the joint surface between the outer peripheral surface of the rehabilitation pipe and the water supply / drainage pipe,
It is provided with peeling prevention means installed at both ends of the rehabilitation pipe.
A fixture for a rehabilitation pipe, characterized in that the rehabilitation pipe is pressure-welded to the inner circumference of the water supply / drainage pipe by the peeling prevention means. In the fixture of the rehabilitation pipe to be laid by inserting it into the pipe of the existing water supply and drainage pipe connected to the manhole
An adhesive applied to the joint surface between the outer peripheral surface of the rehabilitation pipe and the water supply / drainage pipe,
A metal band including a driving wedge to be installed at the end of the rehabilitation tube.
A fixture for a rehabilitation pipe, characterized in that both ends of the rehabilitation pipe are pressed against and fixed to the inner peripheral surface of the water supply / drainage pipe by the metal band. In the method of laying fixtures for rehabilitation pipes, which are inserted into the existing water supply and drainage pipes connected to manholes and laid.
The rehabilitation pipe is inserted into the water supply / drainage pipe,
After applying an adhesive to the joint surface between the outer peripheral surface of the rehabilitation pipe and the water supply / drainage pipe and blowing air into the rehabilitation pipe to bring it into close contact with the inner circumference of the water supply / drainage pipe, the outer peripheral surfaces of both ends of the rehabilitation pipe are inside the water supply / drainage pipe. A method of laying a fixture for a rehabilitation pipe, which comprises installing a peeling prevention means so as to press-contact the circumference . In the method of laying fixtures for rehabilitation pipes, which are inserted into the existing water supply and drainage pipes connected to manholes and laid.
The rehabilitation pipe is inserted into the water supply / drainage pipe,
An adhesive is applied to the outer peripheral surface of the rehabilitation pipe and the joint surface between the water supply and drainage pipes, and air is blown into the rehabilitation pipe to bring it into close contact with the inner circumference of the water supply and drainage pipes, and then a metal band including a driving wedge is used to form the rehabilitation pipe. A method for laying a fixture for a rehabilitation pipe, characterized in that both ends are pressed against the inner peripheral surface of the water supply / drainage pipe to be fixed.

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