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    • 1. 发明专利
    • LEVEE AND ITS FORMING METHOD
    • JPH11286926A
    • 1999-10-19
    • JP8873098
    • 1998-04-01
    • MITSUBISHI PLASTICS INDSEKISUI CHEMICAL CO LTDPADEI KENKYUSHO KKSASAKI CO
    • SAOTOME YUTAKATAKAO KIMITOKUONODERA TSUNEO
    • E02B13/00
    • PROBLEM TO BE SOLVED: To improve the function by covering the ground part of a plastic sheet having one lateral side part buried in the ground with earth and sand, and covering the surface with a plastic cover. SOLUTION: In construction of a levee 1, one lateral side part of a strip plastic sheet 2 is inserted to an insert groove longitudinally provided in a levee setting part followed by back filling and fixed by rolling compaction. A form is thin arranged on both sides of the ground protruding part of the sheet 2, and earth and sand, or earth and sand including cement or a soil hardener is filled in the inner part to form a levee body part 3. After cover insert grooves are formed on both the foot parts of the body part 3, the form is removed, the body part 3 is covered with a plastic cover 4, and both the edges 4a thereof are inserted to the cover insert grooves followed by back filling and rolling compaction to fix the cover 4. According to this, since penetration of water for irrigation and boring by small animals can be surely prevented, and the strength is ensured by the levee body part, the plastic cover can be thinned to significantly reduce the cost, and the construction can be also facilitated.
    • 7. 发明专利
    • APPARATUS FOR CONTROLLING WATER LEVEL OF PADDY FIELD
    • JPH1118598A
    • 1999-01-26
    • JP17938697
    • 1997-07-04
    • SEKISUI CHEMICAL CO LTDPADEI KENKYUSHO KKMITSUBISHI PLASTICS IND
    • TAKAO KIMITOKUONODERA TSUNEOHASHIMOTO TAISUKE
    • A01G25/00E02B13/02
    • PROBLEM TO BE SOLVED: To provide an apparatus for controlling the water level of a paddy field, capable of stably supplying water to the whole paddy field area and automatically keeping the water level of the paddy field to a definite level, easily coping with the change of the culture crop at a part of the field, having excellent installation performance and producible at a low cost. SOLUTION: This water-level controlling apparatus 6 has a water-supplying and discharging port 61 connected to a tilled field 42, a water-supplying part 62 connected to a water-supplying pipe, a water-discharging part 63 connected to a water-discharging pipe, a water-supplying and discharging pit 60a furnished with a water-discharging pipe opened in the ground under the tilled field 42, a water-level controlling pit 60b furnished with a controlled water-supplying part 64 and a controlled water-discharging part 65 connected to the respective upstream and downstream water-level controlling pipes, and a controlled water flowing part 71 connecting the water-supplying and discharging pit 60a to the water-level controlling pit 60b through a shut-off valve 70. The water-supplying pat 62 is provided with a water-supplying valve 65 and a backward flow preventing weir, the water-discharging part 63 is provided with a water-discharging valve 84 and a water-discharge controlling weir 85, and the controlled water-discharging part 65 is provided with a water level controlling weir 86.