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[主观题]
某水库溢洪道进口为平底,共分两孔,每孔宽b=10m,平底顶高程为24.02m,输水段为混凝土等宽矩形陡槽,底坡i=0.2,
槽宽为22m,槽末端高程为8.7m,槽长78m,出口采用挑流消能,如图所示。当通过流量Q=319m3/s时,试用简化的水力指数法计算陡槽水面曲线。
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A.6848
B.6934
C.6618
D.6378
A.17
B.16
C.15
D.14
A.5
B.7
C.9
D.11
A.0.45,会产生空蚀
B.O.45,不会产生空蚀
C.0.66,会产生空蚀
D.0.66,不会产生空蚀
A.47
B.45
C.46
D.44
A.y=0.4x+0.006x2
B.y=0.01x+0.006x2
C.y=0.4x+0.029x2
D.y=0.01x+0.029x2
A.7.2°
B.4.5°
C.5.6°
D.6.5°
A.3.78、4.23
B.5.03、5.87
C.4.95、5.72
D.4.16、5.60
A.y=0.021529x2
B.y=0.021985x2
C.y=0.020828x2
D.y=0.020396x2
A.1扇
B.2扇
C.1~2扇
D.3扇以上
A.导墙的平面弧线曲率半径R≥96.00m,顺水流方向的长度L>30.00m
B.导墙的平面弧线曲率半径R≥96.00m,顺水流方向的长度L>34.00m
C.导墙的平面弧线曲率半径R≥96.00m,顺水流方向的长度L>39.00m
D.导墙的平面弧线曲率半径R≥96.00m,顺水流方向的长度L≥39.00m