丁坝坝顶高程按历年平均水位设计,但不得超过原沟岸的高程。在山洪沟道中,以修筑不漫流丁坝为宜,坝顶高程一般高出设计水位______左右。
A.0.5m
B.1m
C.1.5m
D.2m
A.0.5m
B.1m
C.1.5m
D.2m
A.2862.483m
B.2865.142m
C.2866.183m
D.2866.342m
A.2498.36
B.2801.79
C.2701.79
D.2598.36
A.斜墙底部厚度不宜小于11.25m,斜墙顶部高程应不低于561.00m
B.斜墙底部厚度不宜小于11.25m,斜墙顶部高程应不低于561.30m
C.斜墙底部厚度不宜小于9.00m,斜墙顶部高程应不低于561.00m
D.斜墙底部厚度不宜小于9.00m,斜墙顶部高程应不低于561.30m
A.366.928m
B.368.304m
C.368.128m
D.367.704m
A.Ld=49.35m、td=5.02m
B.Ld=51.47m、td=5.36m
C.Ld=49.35m、td=5.36m
D.Ld=51.47m、td=5.72m
某水库溢流坝为单孔,坝面按WES型曲线设计,坝末端设有挑角θ为35°的挑坎。其他已知数据: (1)下泄流量Q为450m3/s; (2)上游水位高程为1688.65m;(3)下游水位高程为1661.96m;(4)下游河床高程为1657.30m;(5)溢流宽度与挑坎宽度相同,即b为30m;(6)坝下游河床岩基属Ⅲ类。其余尺寸如图9—14所示。试计算下泄水流的射程和冲刷坑深度。
A.227.35
B.229.86
C.229.04
D.228.30
A.可灌水泥浆,帷幕厚度不小于T=2.92m
B.可灌水泥黏土浆,帷幕厚度不小于T=8.34m
C.可灌水泥及水泥黏土浆,水泥浆帷幕厚度2.92m,水泥黏土浆帷幕厚度8.34m
D.均不可灌
A.864.55
B.865.15
C.864.35
D.865.05