JP6340211B2 - Canal covering structure and covering method for canal - Google Patents

Description

The present invention relates to a situation where a paddy field, an agricultural waterway installed in a field, or other waterways collapses due to heavy rain, or a smooth flow of water is hindered by sediments, or a situation where water is leaked from the waterway into the ground and the adjacent land is moistened. In addition, the present invention relates to a irrigation channel covering structure and a irrigation channel coating method that can improve the durability of the irrigation channel.

  For example, an agricultural waterway is generally formed by excavating and forming a substantially bowl-shaped groove on the ground, and covering the bottom and both sides of the groove with concrete to form a concrete covering. Has a problem that it is not suitable for soft ground due to its weight. Therefore, in soft ground areas, the bottom and sides of the groove are covered with corrugated steel sheets (corrugated steel sheets) that are lighter than concrete, and the corrugated steel sheets connected to each other are laid with bolts and nuts sandwiched between waterproof rubber packings. A corrugated steel sheet covering is used.

However, the corrugated steel plate and rubber packing are gradually deformed due to pressure during heavy rain and snowfall, and deterioration due to rusting, causing water to leak from the connection site into the ground, resulting in wetting of the adjacent land, and the end side is drowned There is a problem that the strength is impaired and the outflow of earth and sand is caused. Further, as shown in FIG. 7, a bolt / nut 32 for connection protrudes from the surface 31A of the corrugated steel plate 31 by about 30 mm, and grass and dust are gathered together to gradually become a large lump. There is a problem that not only does the large amount of dust impede the flow of water, but also causes overflow from the irrigation channel, and it is necessary to remove dust every several years. There is also the problem of damaging the landscape.

In view of this, a repairing method such as covering the repaired part with a rubber sheet or applying a resin coating is performed, or a repairing method is provided such that a buried pipe is disposed on the ground where the irregularities are severely deformed.

Not found.

However, the above-mentioned method of repairing with a rubber sheet has the disadvantage that the rubber sheet is peeled off by water pressure or solids flowing down, and the method of applying resin coating has the disadvantage of causing deterioration due to ultraviolet rays, and there is a durable and reliable repair method. The current situation has not been proposed. In addition, the repair method using the buried pipe has a disadvantage that the cost is high, and the repair point increases year by year, so that the disadvantage that the cost is high is difficult to adopt as a repair method.

  The present invention has been made in view of the above-mentioned drawbacks of the prior art, and is suitable for soft ground because it uses a corrugated plate that is lighter than concrete, and the surface is a smooth surface free from projections of bolts and nuts. The purpose of the present invention is to provide a irrigation channel covering structure and a irrigation channel coating method that can smoothly flow down water without weeds and the like, prevent leakage into the ground, and have excellent durability. And

The means of the present invention according to claim 1 configured to solve the above-mentioned problem is arranged from the bottom surface of the irrigation channel to both side surfaces, and a plurality of support frame members arranged in a longitudinal direction at predetermined intervals, and A corrugated plate laid on a support frame material and covering the bottom and side surfaces of the water channel, a covering material arranged to cover the surface of the corrugated plate, and a durability arranged to cover the surface of the covering material This is because the flowing water surface is formed to be a smooth surface by constituting the material.

  And the upper end side of the said corrugated board, a coating | covering material, and a durable covering material is good to set it as the structure covered with a substantially U-shaped umbrella tree along the longitudinal direction of the said water channel.

  The covering material may be a soft material.

  The durable covering material may be a mixture of polymer cement mortar and blast furnace slag and short fibers.

  In the irrigation channel covering structure according to claim 1, a plurality of connected units may be used as a unit, and the adjacent units may be connected by a stretchable absorber.

  Further, the means constituting the present invention according to claim 6 of the present application includes a pretreatment step for maintaining the bottom surface and both side surfaces of the irrigation channel, and a substantially frame-shaped support frame member extending along both side surfaces from the bottom surface of the irrigation channel. A support frame material arranging step of arranging a plurality of the water channels at a predetermined interval in the longitudinal direction of the water channel, and a corrugated plate laying step of covering the bottom surface and both side surfaces of the water channel by laying a corrugated plate on the support frame material And a covering material disposing step for disposing a covering material on the surface of the corrugated plate and a covering material applying step for applying a durable covering material on the surface of the covering material. It is in installing the waterway covering structure which consists of.

The durable covering material may be a mixture of polymer cement mortar and blast furnace slag and short fibers.

Since the present invention is configured as described above, the following effects can be obtained.
(1) Since the water channel covering structure is formed on a smooth surface where the surface of the corrugated plate is covered with a covering material so that bolts, nuts, etc. do not protrude from the surface, water can flow smoothly and dust is hung. Overflow problems caused by wearing and enlarging and hindering the flow of water can also be solved.
(2) Since the channel covering structure has a structure in which the surface of the corrugated plate is covered with two layers of a covering material and a durable covering material, it has excellent strength and durability, and leaks water into the ground. The problem of wetness in the vicinity can be solved without fail, and repair costs and corrugated plate replacement costs can be greatly reduced.
(3) Since no dust removal work is required, maintenance costs can be reduced, and the problem of damaging the landscape can be solved.
(4) Since a soft material is used as the covering material, it can follow the expansion and contraction and distortion of the corrugated plate, so that the irrigation channel covering structure is not greatly damaged.
(5) Since the corrugated plate is configured to support both sides from the bottom with support frame members arranged at predetermined intervals in the water channel, it has strength against ground deformation due to earthquakes and water pressure during heavy rain. Excellent durability.
(6) Durable material is a mixture of polymer cement mortar and blast furnace slag and fibers , and has high toughness, and therefore has resistance to cracking due to fine vibrations caused by heavy rain or earthquake.
(7) The upper end side of the corrugated plate, the covering material, and the durable covering material is covered with a substantially square-shaped umbrella tree along the longitudinal direction of the irrigation channel, and each component is separated by rainwater permeation and freezing. Since the phenomenon is prevented, the irrigation channel covering structure having excellent durability can be obtained.
(8) The water channel covering structure is formed by connecting a plurality of units to form a unit, and the adjacent units are connected by an expansion / contraction buffer to absorb expansion / contraction of the corrugated plate due to changes in temperature and water temperature. It is possible to improve the durability while solving the leakage of water.

It is a partial top view of the waterway covering structure which concerns on embodiment of this invention. It is II-II arrow direction sectional drawing in FIG. It is a partial cross-sectional view of an irrigation channel covering structure. FIG. 4 is a partial vertical sectional view in the direction of arrows IV-IV in FIG. 3. It is a partial expanded end view which shows the connection structure of a corrugated steel plate. It is a partial expanded end view of the expansion-contraction absorber of a corrugated steel plate. It is composition explanatory drawing of the canal covering body which concerns on a prior art.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, 51 is the ground, 52 is an agricultural irrigation channel on which an after-mentioned canal covering structure 1 (hereinafter referred to as covering structure 1) is installed. The irrigation channel 52 has a bottom surface 52A and a slightly inclined side surface on the ground 51. 52B and 52B are excavated and formed in a substantially square shape with the upper part slightly opened.

1 is a covering structure for protecting the irrigation channel 52, 2, 2,... Are a plurality of supporting frame members constituting the covering structure 1, and each supporting frame member 2 is a lower frame member portion by a square member. 2A and side frame members 2B and 2B that stand up obliquely from both ends of the lower frame member 2A, and are formed in a generally square shape with the upper part opened, and the bottom surface 52A and both side surfaces 52B and 52B of the water channel 52 are formed. Are arranged on the ground 51 at predetermined intervals along the line, in this embodiment, at intervals of 900 mm.

Reference numeral 3 denotes a bottom corrugated steel plate that covers the bottom surface 52 </ b> A of the water channel 52. The bottom corrugated steel plate 3 is laid on the lower frame material part 2 </ b> A of each support frame material 2 and arranged in the longitudinal direction of the water channel 52. Reference numerals 4 and 4 denote side corrugated steel plates covering the side surfaces 52B of the irrigation channel 52. The side corrugated steel plates 4 are laid on the side frame member 2B of each support frame member 2 and arranged in the longitudinal direction of the irrigation channel 52. It is. The bottom corrugated steel plate 3 is fixed to the lower frame material portion 2A, and the side corrugated steel plate 4 is fixed to a fastening member 5 including a U-shaped bolt body 5A and a nut 5B fitted to the side frame material portion 2B, respectively. The corrugated steel plates 3 and 4 are integrated with the support frame member 2 to have stability and strength in form.

Further, as shown in FIG. 5, the arranged bottom corrugated steel plates 3, 3 are connected by overlapping one side edge 3 </ b> B and the other side edge 3 </ b> C by fastening with connecting bolts and nuts 6. The gap between the overlapping portions is covered with a sealing material 7 such as efmol, which will be described later, so as to be waterproof.
Similarly, the side corrugated steel plates 4 and 4 and the bottom corrugated steel plate 3 and the side corrugated steel plate 4 are also connected with connecting bolts and nuts 6 so as to have integrity and strength, and are covered with a sealing material 7 for waterproofness. I have it.

Reference numeral 8 denotes a covering material disposed so as to cover the surfaces 3A and 4B of the bottom corrugated steel plate 3 and the side corrugated steel plate 4. The covering material 8 is formed in a plate shape having a thickness of about 50 mm by a material capable of absorbing expansion and contraction due to temperature changes of the corrugated steel plates 3 and 4, for example, a soft material having elasticity and flexibility such as polyurethane and synthetic rubber. A receiving hole 8A is formed at a position corresponding to the U-shaped bolt 5A / nut 5B and the connecting bolt / nut 6 of the fastening member 5. And the coating | covering material 8 adhere | attaches and fixes the back surface 8B on the surface 3A of the bottom face corrugated steel plate 3, and the surface 4B of the side surface corrugated steel plate 4 with the adhesive agent. The reason why the thickness of the covering material 8 is set to about 50 mm is to completely accommodate the U-shaped bolt 5A, the nut 5B, and the connecting bolt / nut 6.

  Reference numeral 9 denotes a durable covering material formed so as to cover the surface 8 </ b> C of the covering material 8. The durable covering material 9 protects the covering material 8 which is a soft material from solids such as driftwood, earth and sand flowing down, and is durable by having frost damage resistance, abrasion resistance, impact resistance and toughness. Material, in this embodiment, a material in which polymer cement mortar is mixed with blast furnace slag and short fibers, and the product name Fmol (registered trademark) formed on the surface 8C of the covering material 8 to a thickness of about 30 mm by spraying means Consists of. Further, the durable covering material 9 is filled in the accommodation hole 8A, so that the surface 8C of the covering material 8 is formed flat.

  Reference numeral 10 denotes a stainless steel umbrella that covers the upper side of the side corrugated steel plate 4, the covering material 8 and the durable covering material 9. The umbrella tree 10 is substantially inclined in a side view from a belt-like upper surface portion 10A, a surface portion 10B extending downward from one side edge of the upper surface portion 10A, and a rear surface portion 10C extending downward from the other side edge of the upper surface portion 10A. It has a shape formed in a bowl shape, and is fitted from above to apply the sealing material 7 to the lower end of the surface portion 10B of the umbrella tree 10 and the portion of the durable covering material 9 so that rainwater or the like enters from the gap. It is preventing.

This umbrella tree 10 covers the upper edge of the side corrugated steel plate 4, the covering material 8 and the durable covering material 9, so that rainwater infiltrates between these constituent materials, and the infiltrated rainwater freezes and expands. A situation in which the covering structure 1 is damaged due to a peeling phenomenon is prevented, and a situation in which it is deteriorated by ultraviolet rays is prevented as much as possible. Furthermore, the strength of the covering structure 1 is enhanced by integrating the side corrugated steel plate 4, the covering material 8 and the durable covering material 9. In order to perform these functions, the umbrella 10 is formed of a stainless steel material having excellent weather resistance and strength.

Further, the predetermined number of bottom corrugated steel plates 3 and side corrugated steel plates 4 are connected as described above to form a unit Y, and the units Y and Y arranged in parallel are connected by an expansion / contraction buffer 11. The stretch buffer 11 is composed of a rubber stretch plate 12 and an end 12A of the stretch plate 12 overlaid on one end of the bottom corrugated steel plate 3 and the side corrugated steel plate 4 located at the end of the unit Y, and a backing plate from the back surface. 13 are brought into contact with each other and fastened with fixing bolts and nuts 14. Since the units Y are connected to each other by the expansion and contraction buffer 11 in this way, the expansion and twisting of the bottom corrugated steel sheet 3 and the side corrugated steel sheet 4 due to fluctuations in air temperature and water temperature are absorbed to prevent water leakage. Moreover, since the impact is absorbed, the durability of the covering structure 1 is enhanced.

  This embodiment has the above-described configuration, and the installation work will be described next. The irrigation channel 52 where the covering structure 1 is installed may be existing or new, but in the case of the existing irrigation channel 52, maintenance work for flattening such as leveling the unevenness of the bottom surface 52A and the side surface 52B and removing the vegetation are particularly performed. Perform (pretreatment step). Next, the support frame member 2 having a shape arranged on the both side surfaces 52B from the bottom surface 52A of the water channel 52 is arranged in the longitudinal direction of the water channel 52 at a predetermined interval (support frame material arranging step).

When the operation of arranging the predetermined number of support frame members 2 in the water channel 52 is completed, the corrugated steel plates 3 and 4 are laid on the support frame members 2 (corrugated plate laying step). That is, the bottom corrugated steel plate 3 is arranged in a row on the lower frame member 2 </ b> A of the support frame member 2 and fixed by the fastening member 5. Adjacent bottom plate corrugated steel plates 3 are connected by connecting bolts / nuts 6 with overlapping edges, and the sealing material 7 closes the gap.
Similarly, the side corrugated steel plates 4 are arranged in a row on the side frame member 2 </ b> B of the support frame member 2, and are fixed by the fastening members 5. Adjacent side corrugated steel plates 4 are connected with connecting bolts and nuts 6 with overlapping edges, and the gap is closed with a seal material 7.

Next, the covering material 8 is disposed on the entire surfaces 3A and 4B of the bottom corrugated steel plate 3 and the side corrugated steel plate 4 laid in the water channel 52 in the above-described process (covering material disposing step). The covering material 8 is formed into a plate-like body made of a soft material such as polyurethane, and has an accommodation hole 8A for accommodating a bolt and a nut in the thickness direction. And the coating | covering material 8 apply | coats an adhesive agent to the back surface 8B, presses and adheres to each corrugated steel plate 3 and 4. FIG.

Further, the durable covering material 9 is entirely applied to the surface 8C of the covering material 8 (covering material applying step). In the present embodiment, the durable covering material 9 is a product prepared by mixing polymer cement mortar with fine powder of blast furnace slag and inorganic fibers having a length of about 12 mm , for example, EFmol (registered trademark) is resistant to frost damage, It is suitable because it has chemical properties. The durable covering material 9 is applied by spraying means, and the thickness to be formed is about 30 to 40 mm as a guide. At the same time, the housing hole 8A of the covering material 8 is filled with efmol to flatten the surface of the durable covering material 9.

Finally, the stainless steel umbrella tree 10 is fitted to the upper edge of the side corrugated steel plate 4, the covering material 8 and the durable covering material 9, and the gap is closed with the sealing material 7. Installation of the covering structure 1 covering the bottom surface 52A and both side surfaces 52B is completed.

  The irrigation channel covering structure 1 installed in this way is excellent in durability and fluidity of water, and the maintenance cost can be reduced because the foreign matter does not block the channel.

DESCRIPTION OF SYMBOLS 1 Waterway covering structure 2 Support frame material 3 Bottom corrugated steel plate 4 Side corrugated steel plate 8 Covering material 9 Durable covering material 10 Umbrella 51 Ground 52 Water channel 52A Bottom surface 52B Side surface

Claims (7)

A plurality of support frame members arranged from the bottom surface of the irrigation channel to both side surfaces and arranged in the longitudinal direction at predetermined intervals; a corrugated plate laid on the support frame material and covering the bottom surface and side surfaces of the irrigation channel; An irrigation channel in which a water surface is formed into a smooth surface by comprising a covering material disposed so as to cover the surface of the corrugated plate and a durable covering material disposed so as to cover the surface of the covering material. Covering structure.   2. The irrigation channel covering structure according to claim 1, wherein the upper end side of the corrugated plate, the covering material, and the durable covering material is covered with a substantially U-shaped umbrella tree along the longitudinal direction of the irrigation channel. .   The canal covering structure according to claim 1, wherein the covering material is made of a soft material. 2. The waterway covering structure according to claim 1, wherein the durable covering material is a mixture of polymer cement mortar and blast furnace slag and fibers .     The irrigation channel covering structure according to claim 1, wherein a plurality of connected units are used as a unit, and the adjacent units are connected by an elastic absorber.   A pretreatment process for maintaining the bottom surface and both side surfaces of the irrigation channel, and a support in which a plurality of substantially frame-shaped support frame members along the both side surfaces from the bottom surface of the irrigation channel are arranged at predetermined intervals in the longitudinal direction of the irrigation channel A frame material arranging step, a corrugated plate laying step for covering the bottom surface and both side surfaces of the water channel by laying a corrugated plate on the support frame material, and a covering material arrangement for arranging a covering material on the surface of the corrugated plate An irrigation channel coating method in which an irrigation channel covering structure having a smooth water surface is installed by an installation step and an attachment material deposition step of depositing a durable substrate on the surface of the coating material. The irrigation canal coating method according to claim 6, wherein the durable covering material is a mixture of polymer cement mortar and blast furnace slag and fibers .

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