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θ = 90゜ 2α = 60゜管の位置管 管 θ = 180゜2α = 90゜θ = 360゜管 管 管 管 V2.32.12.22.32.63.03.53.94.44.95.45.86.36.87.4V0.50.40.40.50.50.60.70.80.91.01.11.21.31.41.5V0.50.40.40.50.50.60.70.80.91.01.11.21.31.41.5V0.50.40.40.50.50.60.70.80.91.01.11.21.31.41.5V0.30.30.30.30.40.40.50.50.60.60.70.80.80.91.0V0.40.40.40.40.50.50.60.70.80.80.91.01.11.21.3V0.30.20.20.20.30.30.40.40.50.50.60.60.70.70.8V0.20.20.20.20.20.30.30.30.40.40.50.50.60.60.6513■■■■参考資料土被り(m)σmax8.256.726.536.556.957.658.519.5610.8712.2013.5214.8516.1817.5218.86土被り(m)σmax1.991.621.581.581.681.852.052.312.632.943.263.593.914.234.55呼び径0.61.01.21.52.02.53.03.54.04.55.05.56.06.57.0呼び径0.61.01.21.52.02.53.03.54.04.55.05.56.06.57.0k1k20.0850.0700.030K3K443.0055.2567.7579.75最大曲げ応力とたわみ率の算定例〈T-25.有効支承角(2σ)120°、埋戻し土の単位体積重量:18kN/m3〉■設計に用いる寸法諸元■許容たわみ率許容たわみ率(Va)は、5%とします。5%としたのは、管路機能保持面から一般的に可とう性管に適用されている規定に準じたものです。■基礎条件と係数基礎条件■VU管 ■VP管 ■許容曲げ応力許容曲げ応力(σa)は、17.7N/mm2とします。これは、硬質塩化ビニル管の曲げ強さ88.3N/mm2を安全率5で除したものです。安全率を5としているのは硬質塩化ビニル管の安全率を諸外国では、破壊強度に対して4.0〜5.0を考慮していますので、その安全側をとったものです。施 工支承角有 効支承角2α0.1320.0790.2230.0110.1200.07975100Vσmax10.021.78.161.67.921.67.951.71.98.449.292.210.332.511.602.913.203.214.813.63.916.4218.034.319.654.65.021.2722.895.475曲げモーメント係数た わ み 係 数 90゜ 60゜180゜ 90゜0.1600.0110.1070.079360゜120゜0.1210.011基礎施工状態0.1020.0300.030 2α = 120゜125150200Vσmax9.092.37.402.17.192.17.212.32.67.668.433.09.383.410.533.811.984.34.813.4414.905.216.365.76.217.8319.306.77.220.77Vσmax8.452.06.881.86.681.86.702.02.27.117.832.68.712.99.783.311.133.74.112.4913.844.55.015.2116.575.45.817.936.219.30Vσmax8.951.87.291.67.081.67.101.72.07.538.302.39.232.610.363.011.793.33.713.2314.664.016.114.44.817.5519.005.25.620.45100125σmax2.281.851.801.811.922.112.352.643.003.363.764.104.464.835.20σmax3.132.552.482.492.642.923.233.634.134.635.145.646.156.657.16サイズ(mm){cm}(mm){cm}(mm){cm}(mm3/mm){cm3/cm}(mm4/mm){cm4/cm}1.500.01500.002252.040.02040.003573.380.03380.007595.040.050413.900.01390.081728.600.02868.170.118049.400.049411.80.163080.900.080916.320.90.2090117.100.11700.2650166.700.167026.50.3310233.600.234033.10.4060316.400.316040.661.40.6140589.800.5900 75100125150200250300350400450500600250300Vσmax9.491.97.721.87.501.87.531.92.27.998.792.59.782.910.983.212.503.64.014.0215.544.44.817.0718.605.220.145.76.121.67Vσmax9.752.17.941.97.712.07.742.12.48.219.042.710.063.111.303.512.854.04.414.4215.984.817.555.319.135.720.706.26.722.29150σmax2.632.142.082.092.222.442.713.053.473.894.314.745.165.596.01外径管厚管厚中心半径DtrZIθ頂A底頂B底頂C底0.304.3000.355.5250.456.7750.557.9750.70104.5010.450.84129.3012.930.99154.1015.411.12179.4017.941.26203.7020.371.41228.0022.801.56252.2025.221.92305.4030.548.911.414.016.521.626.731.837.042.047.052.063.03.03.54.55.57.08.49.911.212.614.115.619.289114140165216267318370420470520630350400450Vσmax10.312.28.402.08.152.08.182.22.58.689.562.810.633.211.943.713.584.115.244.65.016.8918.565.520.225.921.886.46.923.56Vσmax10.482.48.542.28.292.28.322.42.78.839.723.110.813.512.144.013.814.55.015.4917.185.518.876.020.566.522.257.07.523.95Vσmax10.522.58.562.28.312.38.342.42.88.859.753.210.843.612.184.113.854.65.115.5417.235.618.926.120.626.722.327.27.724.02200250σmax3.492.842.762.772.943.233.604.044.605.155.726.286.847.407.97σmax3.492.842.762.772.943.233.604.044.595.155.716.276.847.407.97σmax:最大曲げ応力(N/mm2) V:たわみ率(%)σmax:最大曲げ応力(N/mm2) V:たわみ率(%)断面係数断面2次モーメント2.253.577.59500600Vσmax10.492.58.542.28.292.38.322.42.88.839.723.210.823.612.154.113.824.65.115.5017.195.618.886.120.576.722.267.27.723.96Vσmax10.172.58.282.28.042.38.072.42.88.569.433.210.493.611.784.14.613.4015.035.15.616.6718.306.119.946.721.597.27.723.24300σmax3.492.842.762.772.933.233.594.044.595.155.716.276.847.407.96

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