JPH0357241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for repairing concrete canals, and more specifically, to a method for repairing concrete canals that can completely seal cracks in concrete canals installed in agricultural canals, drainage canals, etc. Regarding renovation methods.

(Prior Art) Conventionally, agricultural waterways and drainage channels have been continuously constructed with concrete waterways at a constant pitch.
However, concrete waterway members tend to crack in a short period of time due to the behavior of the foundation, drying shrinkage of the concrete, or expansion and contraction of the concrete due to changes in environmental temperature. Moreover, the above concrete canals were connected by joints of approximately 10 mm to 20 mm, but these joint members were often made of wood or poured with asphalt pitch, and were not completely waterproof. Because of this, water was leaking from this joint.

By the way, once water leaks from the cracks or joints of the concrete waterway as mentioned above,
The soil under the waterway was eroding, and cracks were growing, causing a large amount of water to leak, causing the waterway and foundation to collapse. This has become a very dangerous problem, especially when there are private houses etc. near waterways.

For this reason, today it would take a huge amount of money and time to completely renovate a building with concrete, so the cracks were filled with sealants, injection materials, mortar, etc. each time. In addition, in areas where water leakage is particularly severe, a repair method is adopted in which the existing concrete waterway is partially removed, a formwork is reassembled with wood, and concrete is poured to create a new waterway. Ta.

(Problems to be solved by the invention) However, among the conventional repair methods, the method of filling localized cracks with sealant, mortar, etc.
Cracks could occur again within a year, and even the repair method, which involves creating new concrete waterways in some areas, had the major problem of requiring a long construction period and being expensive. Furthermore, it has become nearly impossible to completely renovate concrete irrigation canals.

The present invention deals with such practical problems and provides a method for repairing concrete irrigation channels that can be reused and economically completed in a short construction period without removing the concrete irrigation channels. With the goal.

(Means for Solving the Problems) That is, the present invention is characterized by using at least one rubber channel member in which a core material made of a plastically deformable metal member is embedded in rubber. Then, each wall surface of the concrete waterway that has already been provided is coated in contact with each other, and at least the joint part or end of the waterway member is sealed,
There is a method for repairing a concrete waterway by mechanically fixing it with a tightening material.

(Function) According to the method for repairing a concrete canal of the present invention, it becomes possible to reuse and repair an already installed concrete canal without removing it, and also to attach rubber canals to each of the above-mentioned canals. It is possible to freely follow the shape of the wall surface and bring it into close contact with the wall surface, making construction easier.Furthermore, since the rubber waterway member fully follows the behavior of concrete, even if new cracks occur in the concrete waterway. Rubber water channel members do not crack even if
Extremely safe and can be used for a long time.

(Example) Examples of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a partially cutaway perspective view of a rubber waterway member used in the concrete irrigation waterway repair method according to the present invention, and Figure 2 is an example of the concrete irrigation waterway repair method using this rubber waterway member. It is a partially sectional perspective view, and the rubber waterway member 1 used in the present invention is made of a rubber material 2 made of natural rubber, isoprene rubber, chloroprene rubber, ethylene-propylene terpolymer with good weather resistance, butyl rubber, or a blend thereof. A core material 3 made of a metal wire mesh or a metal flat plate is embedded in the core material 3, and has a relatively elongated shape with a substantially U-shaped or flat plate-shaped cross section and a length of about 50 to 300 cm. and,
Inside the end portion 5 of the water channel member 1, there is a stepped portion 4 with a reduced wall thickness, which serves as a joint to another water channel member.

As mentioned above, the core material 3 is a metal member made of a metal wire mesh or a metal flat plate, and this member has the function of retaining the shape of the rubber waterway member 1 and at the same time the function of freely changing the shape of the waterway member 1. is in charge of Therefore, this metal member has a porosity R={a/
(a+d)} ² ×100 (a: opening, d: wire diameter) 30 to 95
%, and plain weave, twill weave, creep weave, rhombus wire mesh, hexagonal wire mesh, etc. can be used. In addition, the metal flat plate is about 0.02 to 1 mm thick and has multiple round and square through holes, and the ratio of the through holes to (area of through holes / flat plate area x 100)
is also about 10-70%.

The rubber waterway member 1 is bent to match the shape of the concrete waterway 6 that has already been installed, and is then folded into each wall surface 7 of the concrete waterway.
In this case, the top 8 of the concrete waterway is also partially covered with the rubber waterway member 1 to prevent rainwater from entering between the concrete waterway 6 and the waterway member 1.

Thereafter, the water channel member 1 is mechanically fixed to the concrete water channel 6 by means of fastening materials 10 made of hole anchor pins, screws, bolts, spools, rivets, etc. at regular intervals, especially at the joint portion 9 of the member. .

In particular, it is necessary that the channel member 1 be fixed at the top 8 of the concrete channel. Of course, the water channel member 1
may be mechanically fixed in a region other than the joint portion 9.

Incidentally, the bending process of the rubber water channel member 1 can be performed at the construction site or at a factory. Although not particularly limited, a preferred method is to bend the rubber waterway member 1 in advance at a factory, bring it to the construction site, and then deform it again at the site.

The above rubber waterway member 1 is a concrete waterway 6.
The joints 9 are joined along the longitudinal direction, and this joint portion 9 is formed by, for example, as shown in FIG. The gaps between the joint portions 9 are filled with a sealing material 11. The overlapping parts 9 are mechanically fixed to the concrete waterway 6 by the tightening material 10 at regular intervals, but in this case, the gap between the overlapping parts formed on the outer side surface of the waterway member is A protective tape 12 is attached to cover it. However, this protective tape 12 is used as needed, and does not need to be used in locations where construction is difficult.

The sealing material 11 is composed of a non-vulcanized rubber composition, a naturally vulcanizable rubber composition, a silicone composition, a urethane composition, a composition in which a bituminous material such as asphalt is mixed with rubber or a synthetic resin. be done. Further, the protective tape 12 is, for example, a vulcanized rubber sheet laminated with a naturally vulcanizable adhesive layer. This sealing material 11 or protective tape 1
2 is used to ensure watertightness of the joint.

Furthermore, the joint portion 9 of the rubber water channel member 1 according to the present invention can be applied to other applications, for example, the end surfaces without a stepped portion are butted together with a sealant interposed therebetween, and a protective tape is further applied to the outer side. After coating the side wall, it is also possible to mechanically fix it to the concrete waterway by means of the fasteners at regular intervals.

In the embodiment described above, one rubber waterway member 1 is covered with the wall surface 7 of the concrete waterway.
When the concrete waterway 6 has large dimensions, a plurality of rubber waterway members are used. That is, as shown in FIG. 4, three flat rubber waterway members 1 are coated on each wall surface 7, that is, the side surface and bottom surface, of the concrete waterway 6 that has already been installed. The treatment of the top corner part 13 of each corner of the concrete canal is as shown in FIG. After fixing to the concrete canal 6 and the water channel member 1, a holding member 15 having an L-shaped cross section is brought into contact with the corner part to prevent water from entering between the concrete canal 6 and the water channel member 1, and is fixed to the concrete canal 6 using the same tightening material 10. do.
The holding member 15 used here is made of a metal member, a synthetic resin member, or a rubber member.

Furthermore, as shown in FIG. 6, the corner portion 16 of the groove bottom is treated by applying a sealing material to the gap between the channel member 1 covered and fixed to the side surface and the channel member 1 covered and fixed to the bottom surface.
1 and with a protective tape 12 interposed in an L-shape on the back side, the ends of each channel member 1, 1 are fixed to the concrete channel 6 with fastening materials 10, 10. In addition, as another treatment, as shown in FIG.
are brought into contact with the protective tape 12 interposed therebetween,
The corresponding material 16 is fixed to the concrete waterway 6 with a tightening material 10 to make the corner portion watertight.

Furthermore, as another treatment, after the stepped portions provided at the ends of each water channel member are overlapped or butted,
It is also possible to fill the gap created by this with a sealing material and fix this joining member to the concrete waterway with a tightening material.

Of course, the joining process in the longitudinal direction of each water channel member 1 is as follows.
As mentioned above, this can be done by overlapping or butting the step portions of the respective water channel members.

In this way, each water channel member 1 may be joined by any of the methods described above, and it is necessary to completely seal the joint portion 9 or the end portion 14 by combining the sealing material 11 or the protective tape 12. Furthermore, the treatment of the top part 8 of the concrete canal is to prevent rainwater from entering in the gap between the concrete canal and the water channel member.
However, even if the coating is coated with

(Effects) As described above, according to the concrete canal repair method of the present invention, without removing the cracked concrete canal, one bendable rubber canal member is placed on the surface of the cracked concrete canal as a base. Alternatively, the wall surface of the waterway is covered by using a plurality of them, and at least the joints or ends of these waterway members are sealed and mechanically fixed to the concrete waterway using a tightening material. It is possible to reuse and repair in a short period of time without having to remove the waterway, and since rubber waterway members are used, it follows the behavior of the concrete waterway well and prevents cracks from occurring in the rubber waterway members. Because it is mechanically fixed to the concrete waterway,
It is stable against flow speeds, and even if a rock falls, it will not break like concrete.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of a rubber water channel member used in the concrete irrigation channel repair method according to the present invention, and FIG. 2 is an example of a concrete irrigation channel repair method using this rubber channel member. FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 1, FIG. 4 is a partial cross-sectional perspective view of another embodiment of the present invention, and shows a method for repairing a concrete irrigation canal, and FIG. 5 is a partial cross-sectional perspective view. An enlarged view of part B in Figure 4, and Figure 6 is an enlarged view of part C in Figure 4.
FIG. 7 is an enlarged view of another corner portion corresponding to FIG. 6. DESCRIPTION OF SYMBOLS 1...Rubber waterway member, 3...Core material, 6...Concrete waterway, 7...Wall surface, 9...Joining part, 10...Tightening material, 11...Sealing material, 1
2... Protective tape, 14... Edge.

Claims (1)

[Scope of Claims] 1. At least one rubber waterway member in which a core material made of a plastically deformable metal member is embedded in rubber is coated on each wall surface of an already installed concrete waterway, and at least the waterway A method for repairing a concrete waterway, characterized in that the joints or ends of the members are sealed and mechanically fixed to the waterway using a tightening material. 2. The method for repairing a concrete waterway as claimed in claim 1, wherein the rubber waterway member has a substantially U-shaped cross section, and the wall surface of the concrete waterway is completely covered with only the rubber waterway member. 3. Renovation of a concrete waterway according to claim 1, wherein the rubber waterway member is flat and each wall surface of the concrete waterway is covered by using a plurality of the rubber waterway members. Construction method.