| 摘要 |
PURPOSE: An installation method of a drainage side ditch to an L-shaped side ditch of a roadway is provided to make rainwater flow through a drainageway of a roadway to a rainwater-spout. CONSTITUTION: The installation method of a drainage side ditch to an L-shaped side ditch of a roadway comprises the steps of installing a drainageway to an L-shaped side ditch(2) installed to both side ditches of a roadway, constructing a rectangular drainpipe(9) with a hole 20-30 centimeters in width, 10-20 centimeters in thickness and 2-2.5 meters in length to make rainwater flow in, then connecting by a rainwater-spout(5) or connecting a U-shaped drainageway(8) with a form, then covering up a trench(12), or connecting a PE drainpipe(11) to the rainwater-spout(5), then covering up a cover with a trench(12).
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