JPH0957851A - Method for lining of inner surface of preset pipe groove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To line continuously at once a long distant pipe groove likely to be connected via some manholes by a method wherein a plurality of specific length flexible lining materials are continuously drawn into a preset pipe groove while connected to each other in a pipe axial direction. SOLUTION: Reinforced materials 8 are connected to each other via a connecting member 9. In that case, they are connected by such number of pieces capable of obtaining connection strength to the extent that they are not disconnected from each other in tensile movement. After connecting a front end of a second lining material 1a to a rear end of a first lining material 1, they are drawn into a pipe groove. When the second lining material 1a is drawn into the pipe groove near to its rear end part inside a vertical shaft at the start point, drawing operation is temporarily interrupted again, and a front end part of a third lining material is connected in the same way to a rear end part of the second lining part 1a, and sealed to keep its air tightness. The operation abovementioned is continuously carried out, a specific number of lining materials 1 are drawn in, and the most front tip is drawn into the vertical shaft to be reached. Therefore, lining operation can be continuously carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for lining the inner surface of an existing sewer, and more particularly to a method for lining an existing sewer pipe over a long distance.

[0002]

2. Description of the Related Art When a sewer pipe of a sewer pipe is deteriorated, a method of rehabilitating the sewer pipe by lining it is used.

As a method for lining such a pipe, a lining material made of a flexible film, a woven or non-woven fabric and a curable resin and having a length corresponding to the length of the pipe to be lined has already been installed. After pulling inside the tube,
Inflate with fluid pressure and harden it, or
The lining material having the length with one end closed is introduced while being reversed inside the existing pipe by applying fluid pressure, and further adhered to the inner surface of the existing pipe by applying fluid pressure,
Lining methods such as a method of curing it are known. By using such a construction method, the existing pipe can be easily repaired or reinforced to be rehabilitated.

[0004]

[Problems to be Solved by the Invention] When constructing in a dense residential area, etc., the locations of the starting shaft and the reaching shaft to be constructed are limited, and the distance between the starting shaft and the reaching shaft may be long. Yes, and sometimes it is necessary to line the long distance at once.

However, in the above-mentioned conventional lining method, the lining material having a length corresponding to the distance in the range to be lined is pulled in and operated. That is, the inner surface of the existing pipe cannot be lined without using a very long lining material. Since the lining material processed so as to have a tubular basic shape is usually processed and manufactured in a factory, the manufacturing length of the lining material is naturally limited.

Even if a long lining (long distance), for example, a tubular lining material having a length of about 200 m or more can be manufactured,
Since the weight of the lining material per roll or package was too large, the material could not be transported to the construction site. In particular, as the pipe diameter of the existing pipe to be lined increases, the weight of the lining material pressed against the inner wall surface of the pipe increases dramatically, which makes it more difficult to convey the material to the construction site. Therefore, unless the length of the lining material per roll or one package is reduced, the material cannot be transported to the site, and as a result, the lining length of the existing conduit that can be continuously constructed at one time is inevitably shortened.
There was a circumstance that continuous long-distance lining work of m or more was impossible.

The present invention has been made in view of the above problems, and an object thereof is to provide a continuous lining of pipes over a long distance beyond the conventional limit, for example, a long distance connected through several manholes. It is to provide a method for continuously lining a pipe at once.

[0008]

In order to achieve the above object, a method for lining an inner surface of an existing pipe according to claim 1 is
A flexible lining material containing an ultraviolet curable resin and having a tubular basic shape is introduced into an existing pipe conduit in an uncured state, and a fluid pressure is applied to the flexible lining material to make it flexible. In the method for lining the inner surface of the existing pipe, wherein the outer peripheral surface of the flexible lining material is pressed against the inner surface of the existing pipe, and the flexible lining material is cured by irradiating the curable resin with ultraviolet rays, the flexible lining The introduction operation of the material is performed by successively pulling the flexible lining materials set to a predetermined length into the existing pipe while sequentially connecting the flexible lining materials to each other in the pipe axial direction.

Therefore, even when the range to be subjected to the lining construction extends over a long distance, continuous lining can be performed without using a long lining material which is difficult to convey. That is, it is possible to cope with various length ranges by using a plurality of flexible lining materials having a length that does not cause difficulty in transportation and adjusting the number of connected flexible lining materials.

Next, a method of lining the inner surface of an existing pipe according to a second aspect of the present invention comprises a plurality of pipes connected to each other through one or more manholes, and the flexible lining material is introduced. After the operation, the operation of removing the portion of the flexible lining material that communicates with the manhole portion is performed.

By facilitating continuous lining construction for long-distance pipes as described in the first aspect of the invention,
Although it is easy to continuously introduce the lining material into the long-distance pipe where one or more manholes are present on the way, in such a case, in the present invention, a portion leading to the manhole of the lining material after the introduction operation of the lining material. Is removed so that the manhole function is not hindered.

According to a third aspect of the present invention, there is provided a method of lining the inner surface of an existing pipe conduit, wherein the connecting operation of the flexible lining material reinforces the flexible lining material so that the flexible lining material is attached to the flexible lining material. This is performed by connecting a plurality of reinforcing members extending in the pipe axis direction to each other and sealing the connecting portion to make a sealed state with respect to the outside of the lining material.

This ensures a reliable and stable connection between the lining materials, and ensures the pressure of the lining material against the inner surface of the pipe by applying the fluid pressure while preventing air leakage and the like. It is tight.

Further, according to a fourth aspect of the present invention, in the inner pipe inner lining method, after the completion of the curing operation of the flexible lining material, the connecting portion between the flexible lining materials is provided between both lining materials. The outer wall surfaces of both ends are brought into close contact with the inner wall surfaces of both lining material connection side ends to be in close contact with each other by a water blocking cover that can be attached.

Thus, after the lining material is hardened, it is possible to prevent leakage of the flowing material in the pipe from the connecting portion when the pipe serves the normal function of sewer or the like.

[0016]

DETAILED DESCRIPTION OF THE INVENTION A lining method according to an embodiment of the present invention will be described below with reference to the drawings. In this embodiment, an example will be described in which a plurality of pipes connected through a plurality of manholes are continuously lined at a time over a long distance.

FIG. 1 shows a plurality of manholes 11a and 11b.
, Which are connected to each other through the pipes, and the ordinary pipe 12 is made of a ceramic pipe, a fume pipe, a concrete rectangular pipe, or the like. The starting shaft 13 and the reaching shaft 14 constructed for lining the existing pipe have a pipe diameter φ of 1000 mm or more.

The inner surface of such a pipe 12 is deteriorated by being exposed to hydrogen sulfide or other corrosive gases, etc. after long-term use, and is corroded to reduce the thickness of the pipe. In many cases, cracks, pipe slippage, or meandering occur due to vibration of vehicles passing on the ground surface, ground pressure, or the like.

First, as shown in FIG. 2, before the lining, the inner surface of the pipe 12 is cleaned by spraying high-pressure water from the high-pressure jet injection unit 16 of the high-pressure cleaning vehicle 15. The high-pressure jet injection unit 16 moves in the pipe 12 from the reaching shaft 14 side toward the starting shaft (right side in the figure).
At this time, the tip end of the rope 17 for pulling the lining material is fixed to the high-pressure jet injecting section 16 so that the high-pressure jet injecting section 16 is propelled and the pipe 12 and the manhole 11 are moved.
It is made to be sent from the reaching shaft 14 to the starting shaft 13 (not shown) through the space of.

After performing the above pretreatment, the lining material towing rope 17 is connected to the front end of the first lining material 1. Here, the lining material 1 is set to a predetermined length unlike the conventional case. That is, the length of the lining material is not a length corresponding to the entire length of the distance range in which the lining is performed, but is a short length lining material in consideration of ease of transportation.

FIG. 3 and FIG. 4 show an example of the structure of a lining material applicable to the lining method of the present invention.
FIG. 3 is a perspective view showing the internal structure of the lining material,
FIG. 4 is a sectional view taken along line AA of FIG.

The lining material 1 is made of a material such as glass fiber or polyester fiber so as to have flexibility as a whole, and is made of knitted or woven or non-woven tubular base materials 2 and 3, and A resin layer 5 formed by impregnating an uncured ultraviolet curable resin, for example, an unsaturated polyester-based resin 4, and an inner thin film 6 made of a polyurethane / polyamide composite film or the like for coating both inner and outer surfaces of the resin layer 5, respectively. And an outer thin film 7.
The base materials 2 and 3 are not limited to two layers and may be wound in multiple layers of three or more when strength is required.

Further, in the resin layer 5, there are provided a plurality of reinforcing members 8 that are arranged close to the outer thin film 7 so as to surround the base member 3 and that are substantially parallel to the pipe axial direction line of the lining member 1. ing. The reinforcing material 8 has a relatively large tensile strength,
A material made of metal or a flexible resin, which has a small elongation with respect to tensile force, is used. Although a wire-shaped member is shown in the drawing, a band-shaped structure may be adopted. Further, it is also possible to form a stranded wire made of metal or a flexible resin, or a strand-shaped body or a band-shaped body obtained by braiding these stranded wires, carbon fiber having high strength, glass fiber or the like. Further, the cross-sectional shape is not limited to a circular shape, but an appropriate shape such as a rectangular shape can be used.

In the lining material 1 of this embodiment,
Since the reinforcing material 8 is provided in the resin layer 5 substantially parallel to the drawing direction, the uncured base materials 2 and 3 sandwiched between the inner thin film 6 and the outer thin film 7 during the drawing work.
Elongation, bending, and flow of the uncured curable resin are prevented.

It is also possible to use the lining material 1 in which a light reflecting film (not shown) such as an aluminum foil is provided on the outside of the outer thin film 7. The presence of the light-reflecting film on the outside can prevent the influence of the light entering from the manhole or the like during the drawing operation, and reflects the light energy from the curing device toward the resin layer 5 impregnating the curable resin. The light absorption efficiency can be increased.

The lining material 1 as described above is shown in FIG.
As shown in (a), it is housed in the lining material supply device 18 arranged on the ground, and is guided from there to the vicinity of the mouth of the starting shaft 13. The lining material supply device 18 is
As shown in FIG. 5A, the lining material may be stored in a state of being wound on a reel, or as shown in FIG.

In the present invention, a plurality of lining materials 1 having a predetermined length set in consideration of ease of transportation are used. When the above reels are used, one lining material is provided for each reel. In the case of the folded type, it is preferable that each lining material is stored in a case.

First, the lining material towing rope 17 guided by the above-described method is connected to the front end of the first lining material 1 from the reaching shaft 14 side to the starting shaft 13 side. Along with this, a second towing rope 19 which is passed through the lining material 1 in advance and has one end attached to the front end of the lining material 1 is coupled to the lining material towing rope 17.
The second tow rope 19 is a rope to be used when tow a curing device, which will be described later, from the reaching shaft 14 side to the starting shaft 13 side.

Further, in order to facilitate the work of pulling the lining material 1 and to introduce the lining material 1 into the pipe 12 without damaging it by the inner wall of the pipe 12, as shown in FIG. The underlay sheet 20 may be laid, and if necessary, a lubricant may be applied to the upper surface of the underlay sheet 20. The underlay sheet 20 passes through the manhole space through which it passes, and is connected to the conduit 12 through the manhole 11.
It is arranged so as to bridge these over the pipe 12 from. The underlayment sheet 20 after the arrangement is fixed at a plurality of positions using anchor bolts or the like so as not to move when the lining material 1 is introduced.

Since the lining material 1, especially the lining material near the reaching shaft 14 side, is dragged over a considerable distance, cold air may be blown as necessary to prevent deterioration of the lining material 1 due to frictional heat. It is preferable to draw the lining material 1 while feeding it into the pipe 12.

Next, the lining material 1 is pulled into the pipe 12 while sliding on the underlay sheet 20 in the pipe 12 by pulling the lining material towing rope 17 toward the reaching shaft 14. When the first lining material 1 is drawn to the vicinity of the rear end portion, the retraction is temporarily stopped, and the front end portion of the second lining material 1a is connected to the rear end portion of the first lining material 1. When the lining material 1 is accommodated in the lining material supply device 18 in a state of being wound on a reel, this connecting operation is performed when the remaining amount of the lining material 1 wound on the reel becomes small. The connecting operation is a connecting operation between the leading end of the lining material 1 wound on the reel to be used next and the rear end of the lining material 1 of the previous reel.

That is, in this embodiment, this connecting work is performed in the vicinity of the starting point vertical shaft 13 before the rear end of the lining material 1 is pulled into the vertical shaft. When the lining material 1 is wound around the reel, it is preferable that the rear end of the lining material 1 is projected to the outside of the reel in consideration of facilitating the connecting work. Also,
When each lining material 1 is stored in a folded manner, a mark is provided at a predetermined position before the rear end of the lining material 1 of each case. Further, although the management of the connection operation time can be performed by the operator's visual judgment, a sensor detects that the remaining amount of the lining material 1 has decreased, and notifies the operator based on this detection signal. The signal may be automatically issued.

FIG. 6 shows an example of a connecting operation of the above lining materials (1 and 1a in the drawing). First, the reinforcing material 8
The connection between them is made via the connecting member 9 in this embodiment. In this case, it is not always necessary to connect all the reinforcing members 8 to each other, and it is sufficient to connect the reinforcing members 8 by the number that can provide a connection strength that does not separate during the pulling movement. Furthermore, when connecting, a plurality of connections are made at predetermined intervals in the circumferential direction so as to ensure uniform adhesion of the lining material 1 to the inner wall surface of the pipe 12 when the diameter is expanded by compressed air, which will be described later. Is preferred. The reinforcing member 8 and the connecting member 9 are preferably connected by using a heat resistant adhesive. Also, the reinforcing material 8
The connection between them does not involve the connecting member 9 as described above,
You may go directly. The connection or adhesion method is not limited to the above-mentioned configuration, and various methods such as heat resistant welding, adhesion, screw joining, and knot joining can be adopted.

Further, since a gap is formed between the end portions which are the connecting portions of the lining material 1, the diameter expansion of the lining material 1 described later by compressed air and the close contact with the inner wall of the pipe 12 cannot be prevented. Thus, for example, it is preferable to simply seal the cylindrical void formed in the periphery with the heat resistant film 10 formed of a laminated film of polyurethane / polyamide or the like.

After the front end of the second lining material 1a is connected to the rear end of the second lining material 1 in this manner, the operation of pulling them into the pipe 12 is performed. Then, when the second lining material 1a is drawn into the starting shaft 15 near the rear end, the drawing operation is temporarily interrupted again and the front end of the third lining material (not shown) is moved to the second lining material. 1a is similarly connected to the rear end portion and sealed to have airtightness.

The above operation is continuously carried out to draw in a predetermined number of lining materials 1, and the leading edge is drawn out into the reaching shaft 14. FIG. 7A shows the inside of the reaching shaft 14, for example, the flexible plastic hose 21 bent from the extension direction of the pipe 12 toward the upper opening of the reaching shaft 14 is installed, and the mouth 22 thereof is provided. It is arranged toward the upper side of the reaching shaft 14. The lining material 1 is supported inside this. In addition, the lining material 1 may be simply laid in the reaching shaft 14 and arranged.

In the figure, a valve 23 is attached to the mouth portion 22 of the flexible plastic hose 21, and a plurality of air vent holes 25 are formed in the valve 23 as shown in FIG. Each air vent hole 25 can be opened and closed by attaching and detaching the plug 24 (painted in black in the figure). That is, the aperture ratio is adjusted according to the number of opened and closed. Similarly, a valve 23 having a plug 24 is attached to the end of the lining material 1 on the side of the starting point shaft 13 as well, and then compressed air is supplied from the side of the starting point shaft 13 to apply a fluid pressure into the lining material 1. By supplying this compressed air, the lining material 1 can be expanded and the outer peripheral surface of the lining material 1 can be pressed and brought into close contact with the inner wall of the pipe 12. Reference numeral 26 in the center of the drawing is a hole for inserting the lining material towing rope 17.

Next, the ultraviolet ray irradiation curing device 27 as shown in FIG. 8 is attached to the front end of the earliest lining material 1 and the second towing rope 1 has already been pulled toward the reaching shaft 14 side.
Connect to 9. Then, a part of the valve 23 is removed, and the curing device 27 is inserted into the lining material 1.
Compressed air is continuously sent from the starting point vertical shaft 13 side to the reaching vertical shaft 14 side in the plurality of connected lining materials 1 even during the insertion work of the curing device 27, and the air vent hole 25 of the valve 23 is provided.
Emissions are continuing.

In this case, the curing device 27 is provided in Japanese Patent Publication No. 7-
41670 is described in detail here, it will be briefly described here. However, a train may be formed by connecting several wagons to each other like joints, or a curing mechanism in which a plurality of light sources are arranged in the circumferential direction. May be a curing device (not shown). For example, the device shown in FIG. 8 includes a light source wagon 28 and a lighting wagon 29 (igniter). Each light source wagon 28 includes a radiation source 30 for emitting curing radiation, while each lighting wagon 29 includes a control device 31 for lighting two light source wagons 28. The plurality of wagons are configured to be elastically supported in the conduit by a spring leg and a wheel provided at one end of the spring leg.

Each light source wagon 28 of the curing device 27 shown in FIG. 8 is connected to the front end portion of the lining material 1, that is, the reaching shaft 14.
After lighting at the side end, the lining material 1 is moved in the direction of the starting shaft 13 at a constant speed. Arrival shaft 1
During the movement from the 4 side to the starting point shaft 13, preferably in the ultraviolet wavelength range 300 to 500 nm, more preferably 350 to 4
Light of 50 nm is applied to the lining material 1 to cure the resin. Even during this hardening process, compressed air is continuously sent from the starting point vertical shaft 13 side to the reaching vertical shaft 14 side in the connected body of the lining material 1 for cooling or the like, and the air vent hole 25 of the valve 23.
Are discharged to the outside through.

After the resin in the lining material 1 is hardened as described above, the excess lining material 1 portions protruding outward from the front and rear pipe openings of the respective rehabilitated pipes 12 are cut off. Furthermore, since the connecting portion is simply sealed with the heat-resistant film 10 for shielding compressed air as shown in FIG. 6, it may be necessary to seal the pipe in the actual condition of the drainage pipe (such as sewer). . Therefore, as shown in FIG. 9, a water blocking cover 32 may be provided to hermetically connect the inner wall missing portions between the adjacent lining materials 1 after curing. The water blocking coating 32 receives a force in the radial direction in the lining material 1, expands into a circular shape, and is brought into contact with the inner surface of the lining material 1.

Then, as shown in FIG. 10, after the lining, the lining material 1 in which the space between the pipe 12 and the mounting pipe portion 11 such as a manhole existing in the middle of the pipes 12 connected to each other is closed. The lining work is completed by cutting and removing the shielded portion 34 of the No. 3 using a remote control type cutting device 33 and opening a hole.

In the method of the present invention, the tubular water-swelling rubber is attached over the entire circumferences of the starting end and the terminating end of each pipe 12 to ensure that water enters between the inner wall of the existing pipe 12 and the lining material 1. Can be prevented.

The lining material 1 which can be used in the present invention is not limited to the lining material shown in FIGS.
An inner plastic foil tube formed by spirally winding one strip-shaped plastic film as described in CT / EP94 / 02521, and a strip-shaped fiber material spirally wound on the foil tube, and further a second strip formed thereon. It is also possible to apply a lining tube in which a band-shaped plastic film is spirally wound to form an outer plastic foil tube, and the band-shaped fiber material is impregnated with a curable resin.

The above embodiment of the present invention is based on the starting shaft 13
It is intended to line the space between
In the present invention, it is also possible to use one of the shafts as a starting point and to line one manhole 11 as a reaching point through several existing manholes 11.

In the above embodiment, when the heated compressed air is not sufficiently discharged only by adjusting the opening ratio of the valve 23 during the lining operation, the portion of the lining material 1 that crosses the manhole 11, that is, the manhole. 11
It is also possible to provide a vent hole in the portion communicating with the vent hole so that the air can also be exhausted.

As described above, according to this embodiment, by connecting a plurality of lining materials 1 to each other, the length which can be introduced into the pipe 12 by one pulling operation can be increased. As a result, it has been difficult in the past, for example, 2
Continuous lining over a long distance of 00 m or more is also possible.

Therefore, it is difficult to secure a place for installing a shaft in a residential dense area, and a vertical shaft is constructed in a place other than the residential dense area, and from there, it passes under the residential dense area and goes through several manholes and then long. Even when it is necessary to perform lining over a distance, continuous lining can be effectively performed.

Further, by curing the resin by photo-curing as in the above-mentioned embodiment, a large amount of heat is not required as in the case of curing by heating with hot air, hot steam, warm water, etc., and in a short time. The lining work can be continuously performed over a long distance.

[0050]

As described in detail above, according to the present invention, a plurality of lining materials are successively connected to each other and continuously drawn into the existing pipe, thereby making it difficult to convey the lining material. This enables continuous lining work over long distances. As a result, even when the number of vertical shafts to be built is small and the vertical shaft setting position is limited, the lining work becomes easier and it is possible to contribute to the expansion of the applicable range of the lining.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a pipe that is connected through a plurality of manholes.

FIG. 2 is an explanatory view showing a process of cleaning the inside of a pipe with a high pressure jet.

FIG. 3 is a partially cutout structure explanatory view showing an example of a lining material used in the present invention.

FIG. 4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 (a) is an explanatory view of a process of drawing the lining material, and FIG. 5 (b) shows another drawing method of the lining material.

FIG. 6 is an explanatory diagram showing an example of a method of connecting lining materials to each other.

FIG. 7 (a) shows a state in which a valve is attached to the tip of the lining material drawn out into the reaching shaft and then the lining material is expanded with compressed air, and FIG. 7 (b) shows the valve. FIG.

FIG. 8 is an explanatory diagram showing a state in which the curing device is inserted into the lining material, moved from the reaching vertical shaft side toward the starting vertical shaft, and the lining material is irradiated with radiation.

FIG. 9 is an explanatory view showing a state in which a water blocking coating is attached to a connection portion of a lining material.

FIG. 10 is an explanatory view showing a process of cutting out a portion of the lining material that crosses the manhole.

[Explanation of symbols]

 1 lining material A axis of lining material 2, 3 base member 4 curable resin 5 resin layer 6 inner thin film 7 outer thin film 8 reinforcing material 9 connection member 32 water blocking coating 33 cutting device

Claims (4)

[Claims] 1. A flexible lining material containing an ultraviolet curable resin and having a tubular basic shape is introduced into an existing pipe conduit in an uncured state, and a fluid pressure is applied to the flexible lining material. By making the outer peripheral surface of the flexible lining material pressed against the existing inner pipe inner surface, in the lining method of the existing inner pipe inner surface to cure the flexible lining material by ultraviolet irradiation to the curable resin, The introduction operation of the flexible lining material is performed by successively pulling the flexible lining materials set to a predetermined length into the existing pipe while sequentially connecting the flexible lining materials to each other in the pipe axial direction. Lining method for the inner surface of the existing pipe. 2. The existing conduit comprises a plurality of conduits connected through one or more manholes, and after the operation of introducing the flexible lining material, the manhole of the flexible lining material is removed. The lining method according to claim 1, wherein a removal operation of a portion communicating with the portion is performed. 3. The connecting operation of the flexible lining materials is carried out by reinforcing the plurality of flexible lining materials provided in the flexible lining material by extending in the pipe axis direction. 3. The method according to claim 1 or 2, wherein the connection is made by connecting them to each other, and in order to prevent air leakage at the time of applying the fluid pressure, an outer surface of the connection portion is covered with a sealing material to be in a simple sealed state. Lining method described in. 4. After completion of the curing operation of the flexible lining material, a connecting portion between the flexible lining materials is erected between both lining materials, and both ends of the flexible lining material are connected to the inner wall surface of both end portions of the lining material. 4. The water-blocking covering body that can be attached by closely contacting the wall surfaces is brought into close contact and communication with each other.
The lining method according to any one of 1.