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[单选题]
某岸坡式溢洪道由进水渠、控制段、泄槽段、挑流鼻坎及出水渠五部分组成。其中进水渠长约260m,渠底为平坡,底宽50m。进水渠在控制段前30m布置为直线段,并设混凝土衬砌,上游其余渠底不衬砌,则混凝土衬砌厚度取( )cm。
A.50
B.40
C.30
D.20
查看答案
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A.50
B.40
C.30
D.20
A.7.2°
B.4.5°
C.5.6°
D.6.5°
A.17
B.16
C.15
D.14
A.47
B.45
C.46
D.44
A.3.78、4.23
B.5.03、5.87
C.4.95、5.72
D.4.16、5.60
A.△h=1.699m
B.△h=1.274m
C.△h=1.019m
D.△h=1.133m
A.≥856.90m
B.≥858.30m
C.≥858.40m
D.≥858.60m
A.渐变段长度L≥30.00m,进水渠渠道转弯半径R≥240.00m
B.渐变段长度L≥38.20m,进水渠渠道转弯半径R≥240.00m
C.渐变段长度L≥34.40m,进水渠渠道转弯半径R≥240.00m
D.渐变段长度L≥28.20m,进水渠渠道转弯半径R≥240.00m
A.39.14、45.13
B.38.05、42.396
C.35.27、39.68
D.43.65、47.54
A.R=16.668~33.336m
B.R=23.748~47.496m
C.R=21.408~42.816m
D.R=25.716~51.432m
A.K检修≥1.5,K地震≥1.3
B.K检修≥1.3,K地震≥1.3
C.K检修≥1.5,K地震≥1.0
D.K检修≥1.3,K地震≥1.0
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