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公式(复式断面过流计算)糙率:n1糙率:n2边坡系数:m1边坡系数:m2水深(m)h1水深(m):h2纵坡:J下底宽(m):b2(左滩)下底宽(m):b3(右滩)下底宽(m):b1(下底宽)上口宽1(m):B1=b1+2m1h1上口宽2(m):B2=b1+2m1h1+2m2h2+b2+b3左滩顶水位宽b2’(m)b2’=B2-b3-h2m2-B1右滩顶水位宽b3’(m)b3’=B2-b2-h2m2-B1面积(m2):A=(b1+m1h1)h1+B1h2+1/2(b2+b2’)h2+1/2(b3+b3’)h2湿周(m):X=b1+2h1(1+m12)1/2+b2+L1+b3+L2左滩边水线L1=((b2’-b2)2+h22)^0.5右滩边水线L2=((b3’-b3)2+h22)^0.5水力半径R=A/X谢才系数(m1/2/s):C=1/nR1/6简化取综合糙率n=0.029流速(m/s):V=C(RJ)1/2流量(m3/s):Q=AC(RJ)1/20.02750.0433B23.512.77b2’b3’0.00021749.13L1n2B1m2L2h249.13b2n1b364m1h185.06b1199.9457.4457.44792.4154201.97828.7595098.7595093.92327243.3015950.231.2645881.46691002.0791162.4
本文标题:复式断面水力计算
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