重力壩設(shè)計(jì)例題-荷載計(jì)算(可以考)

重力壩設(shè)計(jì)例題三、計(jì)算實(shí)例大壩實(shí)用剖面圖荷載計(jì)算簡圖壩體自重計(jì)算靜水壓力泥沙壓力浪壓力計(jì)算揚(yáng)壓力計(jì)算壩體自重計(jì)算W1=1/2×24×21×21×0.2×1=1058.4(kN)力臂=28.56/2－2/3×21×0.2=11.48(m)壩頂寬度=(34.8－28.8)×0.7=4.2(m)壩基寬度=34.8×0.7+21×0.2=28.56(m)力矩=1058.4×11.48=12150.432(kN?m)W2=24×4.2×34.8×1=3507.84(kN)力臂=28.56/2－21×0.2－4.2/2=7.98(m)力矩=3507.84×7.98=27992.563(kN?m)W3=1/2×24×28.8×28.8×0.7×1=6967.296(kN)力臂=28.56/2－28.8×0.7×2/3=0.84(m)力矩=－6967.296×0.84=－5852.529(kN?m)回計(jì)算簡圖靜水壓力計(jì)算PH1=1/2×9.81×33×33×1=5341.545(kN)力臂=1/3×33=11.0(m)力矩=－5341.545×11.0=－58756.995(kN?m)PH2=－1/2×9.81×2.1×2.1×1=－21.631(kN)力臂=1/3×2.1=0.7(m)力矩=21.631×0.7=15.142(kN?m)PV1=9.81×(33－21)×21×0.2=494.424(kN)力臂=28.56/2－21×0.2/2=12.18(m)力矩=494.424×12.18=6022.084(kN?m)PV2=1/2×9.81×21×21×0.2=432.621(kN)力臂=28.56/2－21×0.2/3=12.88(m)力矩=432.621×12.88=5572.158(kN?m)PV3=1/2×9.81×2.1×2.1×0.7=15.142(kN)力臂=28.56/2－2.1×0.7/3=13.79(m)力矩=－15.142×13.79=－208.805(kN?m)回計(jì)算簡圖回計(jì)算簡圖泥沙壓力計(jì)算PsH=1/2×6.5×11.1×11.1×tan2(45－18/2)=211.374(kN)力臂=1/3×11.1=3.7(m)力矩=－211.374×3.7=－782.084(kN?m)PsV=1/2×6.5×11.1×11.1×0.2=80.087(kN)力臂=28.56/2－11.1×0.2/3=13.54(m)力矩=80.087×13.54=1084.378(kN?m)回計(jì)算簡圖浪壓力計(jì)算計(jì)算風(fēng)速V0=1.5×12=18(m/s)，D=900(m)hL=0.59(m)，Lm=6.88(m)因?yàn)間D/V02=27.25，hL=h5%，h1%=1.241h5%=0.737，hZ=0.248。Hcr=0.89，H=33>Hcr，且H>Lm/2，深水波PL=1/4×9.81×6.88×(0.737+0.248)=16.62(kN)力矩=－16.62×33=－548.36(kN?m)回計(jì)算簡圖揚(yáng)壓力計(jì)算U1=－9.81×2.1×28.56×1=－588.365(kN)力臂=0(m)力矩=0(kN?m)U2=－9.81×6.9×0.25×(33－2.1)=－522.898(kN)力臂=28.56/2－6.9/2=10.83(m)力矩=－5662.98(kN?m)U3=－9.81×1/2×(28.56－6.9)×0.25×(33－2.1)=－820.722(kN)力臂=2/3×(28.56－6.9)－28.56/2=0.16(m)力矩=－131.32(kN?m)U4=－9.81×1/2×6.9×(1－0.25)×(33－2.1)=－784.346(kN)力臂=28.56/2－1/3×6.9=11.98(m)力矩=－9487.70(kN?m)荷載作用原則值作用設(shè)計(jì)值力臂(m)彎矩原則值(kN·m)彎矩設(shè)計(jì)值(kN·m)垂直荷載(kN)水平荷載(kN)垂直荷載(kN)水平荷載(kN)自重W11058.401058.4011.4812150.4312150.43W23507.843507.847.9827992.5627992.56W36967.306967.30-0.84-5852.53-5852.53水平水壓力PH15341.555341.55-11.00-58757.00-58757.00PH2-21.63-21.63-0.7015.1415.14垂直水壓力PV1494.42494.4212.186022.086022.08PV2432.62432.6212.885572.165572.16PV315.1415.14-13.79-208.80-208.80泥沙壓力Psv80.0980.0913.541084.371084.37PsH211.37253.65-3.70-782.08-938.50浪壓力PL16.6219.94-33.00-548.36-658.04揚(yáng)壓力浮托力U1-588.36-588.360.000.000.00滲透壓力U2-522.90-627.4810.83-5662.98-6795.58U3-820.72-984.870.16-131.32-157.58U4-784.35-941.2211.98-9396.47-11275.76∑9839.485547.909413.895593.50-28502.79-31807.03∑WK∑PK∑WR∑PR∑MK∑MR設(shè)計(jì)洪水位情況荷載作用原則值作用設(shè)計(jì)值力臂(m)彎矩原則值(kN·m)彎矩設(shè)計(jì)值(kN·m)垂直荷載(kN)水平荷載(kN)垂直荷載(kN)水平荷載(kN)自重W11058.401058.4011.4812150.4312150.43W23507.843507.847.9827992.5627992.56W36967.306967.30-0.84-5852.53-5852.53水平水壓力PH15838.185838.18-11.50-67139.03-67139.03PH2-53.42-53.42-1.1058.7658.76垂直水壓力PV1556.23556.2312.186774.846774.84PV2432.62432.6212.885572.165572.16PV337.3937.39-13.51-505.15-505.15泥沙壓力Psv80.0980.0913.541084.371084.37PsH211.37253.65-3.70-782.08-938.50浪壓力PL6.517.81-34.50-224.51-269.41揚(yáng)壓力浮托力U1-924.57-924.570.000.000.00滲透壓力U2-527.97-633.5710.83-5717.96-6861.55U