Building and civil
Concrete gravity dam plan (55 m high, 200 m crest length)
The plan of a concrete gravity dam: the body, the spillway, the intake works and the access road for maintenance
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
ダムの平面図で主役なのは、水をためる所ではなく「流す所」。洪水吐(こうずいばき)は、設計を超える水が来たときに逃がす口。ここが詰まると、水は堤体を越えてダムそのものを壊す。
55m 落ちた水はそのままでは川底を掘る。勢いを殺す場所を下流側に作るのは、ダムを守るためでもある。
貯水池は深さで水温も濁りも違う。どの高さから取るかを選べるようにしてあるので、塔の形になっている。## 左岸・右岸は、下流を向いて決める
川の左岸・右岸は下流を向いたときの左と右(河川の決まり)。この図は北が上で、水は北(貯水池)から南(減勢工)へ流れるので、下流を向くと東が左岸、西が右岸 —— 図の左側が右岸になる。
堤高・堤頂長・貯水容量などの数値は架空(実在のダムではない)。1 px = 500 mm
Source (YAML)
examples/gallery/28-ダムの平面図.zumen.yaml
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