| 摘要 |
PROBLEM TO BE SOLVED: To provide a culvert formation device that suppresses clogging of openings of a penetration mark groove and a vertical port passage by soil of a farm field and maintains excellent draining property and air-permeability of the farm field, by having the penetration mark groove and the vertical port passage open in a digging groove formed at a position where the vertical port passage is formed as a lower part of a plow member scoops the soil of the farm field and discharges the soil sideways as a machine body travels, and by causing water on a surface of the farm field reach a culvert from the openings of the penetration mark groove and the vertical port passage through the digging groove, thereby reducing a distance from the farm field surface to the culvert.SOLUTION: A culvert formation device has a plow member 27 provided on a machine frame 3, the plow member being capable of scooping soil of a farm field and discharging the soil sideways, thereby forming a digging groove U at a position D where a vertical port passage is formed.SELECTED DRAWING: Figure 2 |
