U型灌溉渠道斷面設(shè)計及水力要素計算表

1313編號代號U型灌溉渠道斷面設(shè)計及水力要素計算表單位名稱計算式號及數(shù)據(jù)UBJ30UBJ35UBJ40UBJ45UBJ50UBJ55UBJ60上口UBJ65UBJ70B=b+2^bmm300350400450500550600650下口b=B-2^bmm260290320350380410440470500b=B-2^bmm260290320350380410440470500半△b=1/2(B-b)mm2030405060708090l004△h弦心距△h=bXb/(2XH1)mml0l52025304045505Hl上部高度Hl=H-r+^hmm2603203904405005606206707306r圓弧半經(jīng)r=l/2XbJ(l+Ab2/Hl)mml30l46l6ll77l922082392557H總高度H=Hl+r-Ahmm38045l53l59l66273380486493580圓心角0=2arcos(△h/r)度l7l.l8l68.l9l65.75l63.74l62.05l60.62l59.39l58.32l58.749I弧長l=2n0r/360mm39042846650554458362266l700l0L腰線長L=VH21+Ab2mm26l32l392443504564676737llX濕周X=l+2L—2h/cosamm85ll0l0ll90上下口寬的一△b335224625301490165118111953211312h超高h(yuǎn)=H1-H0mm30303030303030303013a錐度a=artgQb/H1)度4.405.365.866.486.847.137.357.657.8014B0過水面寬BO二b+2Ab-2htgamm295.4344.4393.8443.2492.8542.5592.3641.9691.815H0上部水深H0=H1-hmm29534439444349354259264269216Q過水面積Q=l/2(b-bO)H+nr0/360(l/2)bAbcm28801210152920272519305936534247493917R水力半經(jīng)R=Q/Xmm10312013715216918520221723418C謝才系數(shù)C=(1/n)R1/6m3/s40.341.342.243.043.744.445.145.646.219q流量系數(shù)Q=QCVRm3/s1.141.732.553.404.535.847.409.0111.0320S斷面積S=Q+1/2(B0+B)hcm29691314174821632666322238324437514821a壁上口厚a=l/2(A-B)cm6.006.006.006.006.007.007.007.007.0022A總寬度A=B+2acm42047052057062069074079084023e底砼

厚e=G-Hmm50595958585756555524f拱高f=H-H1mm12013614115216317318419520525G砼高G=H+emm430510590650720790860910990266S砼面積6s=AG-Sm20.0840.1080.1320.1540.1800.2230.2530.2750.31727Q渠道過水流量Q=QCVRii=1/500時m3/s0.0510.0770.1140.1520.2030.2610.3310.4030.4