JP2812900B2 - Agricultural irrigation canal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural waterway with a water leakage prevention measure.

[0002]

2. Description of the Related Art As an agricultural waterway, a structure in which a number of U-shaped concrete blocks are connected is known. Conventionally, mortar, caulking material, or the like is filled at the joint of the concrete block to prevent water leakage.

[0003]

However, in the case of soft ground, etc., the waterway may sink unevenly due to the weight of the concrete block due to the weight of the concrete block and the weight caused by the flow of water. However, if the bottom plate and side plate of the concrete block are separate even if there is no problem in the ground, the joint of both may shift due to expansion and contraction of the concrete, cracks and gaps occur in the joint, and water leakage occurs There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an agricultural waterway which has joints having a high follow-up property with respect to displacement between concrete blocks and deformation of concrete, and which has little water leakage.

[0005]

SUMMARY OF THE INVENTION An agricultural waterway according to the present invention, which has been made to solve the above-mentioned problems, has an agricultural waterway formed by arranging a large number of U-shaped concrete blocks. The packing is filled in a state flush with the inner surface of the water channel or in a state of being lowered from the inner surface to form a joint, and along the joint, a 0.5 mm to 3 mm thick coating band made of a solventless polyurethane resin paint is formed. The block is provided in a series from the upper left edge to the upper right edge of the block with a width covering the edges and the joints of the blocks arranged before and after. When there is a gap along the water channel, packing is similarly attached to the gap to form a coating strip, but in any case, at least the upstream edge of the coating strip at the edge of the block. In some cases, a groove having a depth equivalent to the set thickness of the coating film strip is extended in order to store the film.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a first embodiment according to the present invention. This is an agricultural waterway formed by arranging a number of U-shaped concrete blocks having a bottom portion 10 and a standing portion 11 in series. In the gap between the blocks 1 and 1, there is formed a joint 2 in which a rubber packing 3 is loaded in a state where the packing 3 is slightly lowered from the inner surface of the block 1 over the entire area thereof. 3: 1
(Trade name) Mizeron S-100 / A-10, which is a two-component solvent-free polyurethane resin coating compounded by (volume ratio)
00 (manufactured by Mitsui Kinzoku Paint Chemical Co., Ltd., hereinafter referred to as Mizeron). Incidentally, the coating liquid was 55% of a polyol resin and 33% of a coloring pigment.
%, Extender pigment: 3%, additive: 9%, and the curing agent is a modified isocyanate resin: 100%.

The coating strip 4 is 0.5 mm to 3 mm thick and 5 mm to 2 mm from the ends of the blocks 1 and 1 arranged before and after the joint 2.
It is provided with a width of 0 mm to cover the edges 5 and 5 and the joint 2, and also penetrates into the concave portion 12 formed facing the packing 3 loaded in the gap, and tightly joins the block 5 and the packing 3. Further, since the coating strip 4 is provided in a series over the upper edges 6, 6, 7, and 7 of the right and left standing portions 11,
The peel strength is extremely high as compared with the case where only the inner surface of the upright portion 11 is coated. Polyurethane resin coatings that do not contain solvents, such as Mizurone, quickly dry and solidify without generating pinholes, blisters, and craters, and have a smooth finished surface, durability, abrasion resistance, water resistance, and water resistance. A high-quality coating strip 4 having both water permeability is formed. In addition, there is an advantage that the coating can be performed to a thickness of 500 μm to several cm by one coating by brush coating, flow coating or spray coating using a special coating machine.

[0008] The above-mentioned agricultural irrigation canal can be obtained by taking measures to prevent water leakage from an existing agricultural irrigation canal or newly obtained.

When taking measures against water leakage in an existing agricultural waterway, firstly, the water flow is cut off, and mortar or the like filled in the gaps between the blocks is eliminated at least to such an extent that the packing 3 can be loaded. Wash with water. Thereafter, water is removed by high-pressure air and dried by a gas burner. If the inner surface of the water channel is severely uneven, the surface is finished smoothly with mortar or the like, and at least the edge 5 of the concrete block 1 disposed at the upstream side with respect to each gap. A V-shaped groove 9 is formed on the inner surface along the joint 2 from the upper left edge 6 to the upper right edge 7 of the block 1 using a grinder or the like. The location where the groove 9 is formed is a location where the upstream end of the coating strip 4 is located (that is, 5 m from the joint 2).
m to 20 mm), and the depth is set substantially equal to the thickness of the coating film strip 4.

Next, a tape is applied to match the width of the paint to be applied with the paint and the packing 3 made of synthetic rubber such as natural rubber or EPR (ethylene propylene rubber) or foamed resin is prevented from protruding into the inner surface of the water channel. Fill and dilute 30% to 60% of Mizen Sealer as an undercoat to strengthen the adhesion of coating strip 4 with a roller or brush.
２2 times to impregnate the portion of the concrete block 1 where the coating strip 4 is to be formed. Within 1 hour to 24 hours after the undercoating, Mizeron is spray-painted with a special coating device, and the V-shaped groove 9 is filled to complete a water channel in which water leakage prevention measures have been taken. As a result, the edge 8 on the upstream side of the coating strip 4 is buried in the V-shaped groove 9 as described above, so that the peeling of the coating strip 4 can be prevented without direct contact of the edge 8 of the coating strip 4 with running water. In addition, it is possible to prevent dust or the like flowing along with water from being caught. still,
In the case of newly obtaining the agricultural irrigation canal, the blocks 1 may be arranged after leveling the ground as in the related art, and the same operation may be performed.

FIG. 2 shows a second embodiment according to the present invention. This is an agricultural waterway formed by assembling a plate-shaped concrete block serving as the bottom plate 13 or the side plates 14 and 14 to form a U-shape and arranging a large number of them in series. This waterway is also the first waterway. It can be obtained through the same steps as in the embodiment. In this case, joints along the flow path and joints crossing the flow path are formed, and the coating strip 4 is a series of vertical and horizontal crossings. The portions of the coating strip 4 that run across the waterway are the upper end faces 15, 15 of the left and right upright plates 14, 14.
, The peel strength of the coating film strip 4 is increased.

[0012]

As described above, the agricultural irrigation canal according to the present invention can be obtained by repairing the joints of the existing agricultural irrigation canal. Therefore, the agricultural irrigation canal must be newly installed. By using small-scale construction, it can be used continuously for a long time. As a result, it not only contributes to saving construction costs and shortening the construction period,
Along with the above-mentioned properties inherent in the solvent-free polyurethane resin coating, a high-quality agricultural waterway with good flow and no water leakage is constructed, and greatly contributes to the effective use of limited water even when water is insufficient.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of an agricultural waterway according to the present invention.

FIG. 2 is a perspective view showing a second embodiment of an agricultural waterway according to the present invention.

FIG. 3 is a sectional view of a main part of an agricultural waterway according to the present invention.

FIG. 4 is a plan view of a main part of an agricultural waterway according to the present invention.

[Explanation of symbols]

 1 block 2 joint 3 packing 4 coating strip 5 edge 6 upper left edge 7 upper right edge 8 edge 9 groove

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E02B 5/02 E02B 13/00 301 E03F 5/04

Claims (3)

(57) [Claims] In an agricultural water channel formed by arranging a large number of U-shaped concrete blocks, each block (1,
A packing (3) is filled in the gap between 1) so as to be flush with the inner surface of the water channel or in a state of being lowered from the inner surface to form a joint (2), and along the joint (2), a solventless polyurethane resin paint is used. 0.5 to 3 mm thick coating strip (4)
The blocks (1,5) are arranged so as to cover the edges (5,5) of the blocks (1,1) arranged before and after the joint (2) and the width covering the joint (2).
(1) An agricultural canal characterized by being provided in a series from the upper left edge (6, 6) to the upper right edge (7, 7). 2. In an agricultural waterway having a U-shaped cross section formed by arranging a large number of rectangular concrete blocks, a packing (3) is provided in a gap between the blocks (1, 1).
Is filled in a state flush with the inner surface of the waterway or below the inner surface to form a joint (2), and along the joint (2),
0.5mm-3m made of solventless polyurethane resin paint
A m-thick coating strip (4) is provided in a series with a width covering the edges (5, 5) of the blocks (1, 1) arranged on both sides of the joint (2) and the joint (2), and crosses the waterway. Agriculture characterized by being provided in series from the upper left edge (6, 6) to the upper right edge (7, 7) of the agricultural irrigation channel in the coating zone (4) along the joint (2). Irrigation canal. 3. A depth corresponding to a set thickness of the coating strip (4) is provided at an edge (5) of the block (1) to accommodate at least an upstream edge (8) of the coating strip (4). The agricultural waterway according to claim 1 or 2, wherein the groove (9) has an extension.