JPS62196106A - Manufacture of u-shaped ditch made of concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a U-shaped concrete groove whose inner surface is lined with a lining material such as a synthetic resin.

(Prior art) Conventionally, concrete U-shaped grooves have been manufactured as shown in Figure 8 (a).
) to (C). That is, a mold 1' for forming a U-shaped groove in an inverted state is used;
are two groove-shaped portions 11' for forming both side walls of the U-shaped groove.
, 11' and a flat plate part 12 for connecting the inner walls of the grooved parts 11', 11' and forming the bottom wall of the U-shaped groove, and having an inverted U-shaped cross section as a whole. , the long lining material 2' having a U-shaped cross section and ears 4' on the outside of the opening edges of the side parts 3' is placed in the flat plate part 12' of the mold 1' and the groove-shaped parts on both sides thereof, with the opening facing downward. In this method, the concrete 5' is fitted along the inner walls of the molds 11 and 11', poured into the mold 1', cured and hardened, and then the hardened material is removed from the mold 1. In the figure, the mold 1' is an elongated mold that is continuous in the direction perpendicular to the plane of the paper.

(Problems to be Solved by the Invention) However, the above conventional method has the following drawbacks.

(1) Concrete is usually poured into a mold while being vibrated with a pie break in order to densely fill the concrete into the mold.
The vibration causes the lining material to lift up, making workability poor (
Become.

(2) Also, as the lining material rises, concrete enters between the mold and the lining material, resulting in the U.
Another disadvantage was that the inner surface of the grooves was poorly finished and did not look good.

(3) Furthermore, in the U-shaped groove obtained by the conventional method, the ears of the lining material are simply buried in the concrete layer. For example, if the lining material is made of synthetic resin, the adhesion to the concrete may be poor. Moreover, since the thermal expansion coefficients were different, it was not possible to obtain a product with excellent adhesion.

(Means for Solving the Problems) The present invention eliminates the drawbacks of the conventional methods described above, and creates U-shaped grooves with good internal finish and excellent adhesion between the lining material and concrete with good workability (manufacturing). The purpose is to provide a method that can be used.

That is, the gist of the present invention is that when manufacturing a concrete U-shaped groove, a mold for forming the U-shaped groove in an inverted state is used, and the cough mold is made of two molds for forming both side walls of the U-shaped groove. A long lining material consisting of a groove-shaped part and a flat plate part for connecting the inner walls of the groove-shaped part and forming the bottom wall of the U-shaped groove, and having a generally inverted U-shape as a whole and a U-shaped cross section. is fitted along the inner walls of the flat plate part of the mold and the groove-shaped parts on both sides of the mold with the opening facing downward, and ears are provided protruding outside the edges of the opening on both sides of the long lining material, and the ears A plurality of holes are drilled in the ear portion, and the tip of a fixing jig having a locking convex portion at the tip is inserted and locked into the hole of the ear portion to fix the lining material, and then concrete is poured into the mold, A method for manufacturing a concrete U-shaped groove, which includes curing and hardening.

The material of the lining material used in the present invention is not particularly limited, and examples include synthetic resins such as polyethylene, polyvinyl chloride, ultra-high molecular weight polyethylene, and polyester resins, and fiber-reinforced synthetic resins reinforced with fiber-reinforced materials such as glass fibers. , or one made of metal such as stainless steel. Among them, ultra-high molecular weight polyethylene, polyester resin reinforced with glass fiber, etc. have a surface Ff? Since the coefficient of friction is small, it is suitable for use as a U-shaped groove for transporting snow.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 to 4 are explanatory views showing the manufacturing process of the present invention.

In the figure, 1 is a mold having an inverted U-shaped cross section as a whole, and in order to mold the U-shaped groove in an inverted state, two groove-shaped parts 11 and 11 are used to mold both side walls of the U-shaped groove. and,
It consists of a flat plate part 12 that connects the inner walls of the groove-shaped parts 11, 11 and forms the bottom wall of the U-shaped groove. The mold 1 is an elongated mold that continues in the direction perpendicular to the plane of the paper in the figure.

Reference numeral 4 denotes a lining material, which has a U-shaped cross section similar to that of the mold 1, and its inner surface conforms to the surfaces of the inner walls of the flat plate portion 12 and the grooved portion 11 of the mold 1. The lining material 4 has ears 6 at the opening edges of both side parts 5. The ears 6 are formed continuously in the longitudinal direction of the lining material 4. As shown in FIG. 5, the ear portion 6 is provided with a plurality of holes 7, 7, . . . at predetermined intervals in the longitudinal direction. The shape of the hole 7 may be circular, oval, square, oval, or the like. The size of the hole may be larger than the outer diameter of the tip of the fixing jig 8, which will be described later, and smaller than the outer diameter of the collar-shaped locking protrusion 9.

The rod-shaped fixing jig 8 is for fixing the lining material 4, and is provided with a collar-shaped locking convex portion 9 at a position slightly away from the tip.

The lining material 4 is fitted along the inner walls of the flat plate part 12 of the mold 1 and the grooved parts 11.11 on both sides thereof, with the opening thereof facing downward. At this time, a mold release treatment may be performed by applying a mold release agent or the like to the inner wall surfaces of the flat plate portion 12 and the grooved portions 11.11 of the roughening mold 1. Furthermore, reinforcing reinforcing bars 10 are placed within the formwork 1 as required, as shown in the drawings.

Next, the tip of the fixing jig 8 is inserted into the hole 7 of the ear part 6 of the lining material 4, and the brim-like locking convex part 9 of the jig 8 is engaged with the ear part 6, so that the lining material 4 is inserted into the mold 1. Fixed to.

The other end of the fixing jig 8 is supported and fixed outside the mold (
(not shown).

After the lining material 4 is fixed, concrete 2 is poured into the mold 1, and the concrete is poured to a predetermined height while being vibrated with a pie break (not shown). At this time, the lining material 4 is closely attached and fixed to the inner wall surfaces of the flat plate part 12 and the grooved part 11.11 of the mold 1 by the fixing jig 8, so even if it receives high-break vibration,
Lifting of the lining material 4 is prevented. Moreover, since no gap is created between the lining material 4 and the inner wall surfaces of the flat plate part 12 and the grooved part 11.11 of the mold 1, the concrete 2 is .1
1 and the inner wall surface of 1, and the finished product obtained has a good finish and good appearance.

Furthermore, since the outer diameter of the tip of the fixing jig 8 inserted into the hole 7 of the ear part 6 of the lining material 4 is smaller than the hole 7,
As shown in FIG. 6, the concrete 2 is also filled into the hole 7 of the ear 6. Therefore, the lining material 4 is firmly buried and integrated with the concrete by the concrete 2 filled in the hole 7 of the ear part 6.

Next, after curing and hardening the concrete 2, the cured product is taken out from the mold 1 and a part of the fixing jig 8 that protrudes outside the concrete layer is cut, thereby producing concrete whose inner surface is lined with a lining material. A V-shaped groove A is manufactured (see FIG. 7).

(Effects of the Invention) As described above, in the method for manufacturing a U-shaped groove for concrete according to the present invention, a plurality of holes are bored in the ears on both sides of a lining material having a U-shaped cross section, and the tips of the holes are The tip of a fixing jig with a locking protrusion is inserted and locked, and the lining material is fixed before concrete is poured. Therefore, when concrete is tightened using pie breaks, etc., the lining material does not lift up or There is no gap between the lining material and the mold. Therefore, a product with a good inner surface finish can be obtained.

In addition, the fixing jig is buried in the concrete layer of the product with its tip locked in the ear hole of the lining material.
The adhesion between the lining material and concrete becomes strong.

Furthermore, if the outer diameter of the tip of the fixing jig is smaller than the size of the ear hole as in the example, the concrete will also fill the ear hole. As a result, the lining material is more firmly integrated with the concrete. In addition, when concrete is compacted, some degassing takes place through the holes in the ears, making it possible to obtain a product with a high packing density.

[Brief explanation of drawings]

Figures 1 to 4 are explanatory diagrams showing the manufacturing process of the method of the present invention, Figure 5 is a perspective view showing an example of the lining material used in the method of the present invention, and Figure 6 is a part of Figure 3. FIG. 7 is a longitudinal sectional view of a product obtained by the method of the present invention, and FIGS. 8(a) to 8(C) are explanatory diagrams showing a conventionally known manufacturing process. 1... Mold, 2... Concrete, 4... Lining material, 6... Ear part, 7... Hole, 8... Fixing jig,
9...Locking convex portion.

Claims (1)

[Claims] 1. When manufacturing concrete U-shaped grooves, a mold for forming an inverted U-shaped groove is used;
It consists of two groove-shaped parts for forming both side walls of the groove and a flat plate part for connecting the inner walls of the groove-shaped parts and forming the bottom wall of the U-shaped groove, and the overall shape is approximately inverted U-shaped. A long lining material with a U-shaped cross section is fitted along the inner walls of the flat plate part of the mold and the grooved parts on both sides of the mold with its opening facing downward, and the edges of the openings on both sides of the long lining material are fitted. An ear is provided protruding from the outside, a plurality of holes are drilled in the ear, and the tip of a fixing jig having a locking convex portion at the tip is inserted into the hole of the ear and locked to fix the lining material. A method for manufacturing a concrete U-shaped groove, which comprises: then pouring concrete into a mold, curing and hardening it.