頂管の位置基礎条件管A管管B管管C管DtrZIVVVVVVVV 底 頂 底 頂 底曲げモーメント係数た わ み 係 数0.002250.003570.00759参考資料参考資料501基礎施工状態θ = 90゜ 2α = 60゜0.1020.030θ = 180゜0.0850.0302α = 90゜θ = 360゜0.0700.030 2α = 120゜125150200VσmaxVσmaxVσmax9.092.08.451.88.957.401.86.881.67.297.191.86.681.67.087.212.06.701.77.107.662.27.112.07.538.432.67.832.38.309.382.98.712.69.2310.533.39.783.010.3611.983.711.133.311.7913.444.112.493.713.2314.904.513.844.014.6616.365.015.214.416.1117.835.416.574.817.5519.305.817.935.219.0020.776.219.305.620.45100125σmaxσmax2.280.33.131.850.22.551.800.22.481.810.22.491.920.32.642.110.32.922.350.43.232.640.43.633.000.54.133.360.54.633.760.65.144.100.65.644.460.76.154.830.76.655.200.87.16サイズ（mm）｛cm｝（mm）｛cm｝（mm）｛cm｝(mm3/mm)｛cm3/cm｝(mm4/mm)｛cm4/cm｝ 75100125150200250300350400450500600250300VσmaxVσmax1.99.492.19.752.21.87.721.97.942.01.87.502.07.712.01.97.532.17.742.22.27.992.48.212.52.58.792.79.042.82.99.783.110.063.23.210.983.511.303.73.612.504.012.854.14.014.024.414.424.64.415.544.815.985.04.817.075.317.555.55.218.605.719.135.95.720.146.220.706.46.121.676.722.296.9150σmax0.42.630.30.42.140.30.42.080.30.42.090.30.52.220.40.52.440.40.62.710.50.73.050.50.83.470.60.83.890.60.94.310.71.04.740.81.15.160.81.25.590.91.36.011.0外径管厚管厚中心半径898.93.00.3043.0011411.43.50.3555.2514014.04.50.4567.7516516.55.50.5579.7521621.67.00.70104.5010.4526726.78.40.84129.3012.9331831.89.90.99154.1015.4137037.011.21.12179.4017.9442042.012.61.26203.7020.3747047.014.11.41228.0022.8052052.015.61.56252.2025.2263063.019.21.92305.4030.54350400450VσmaxVσmaxVσmax10.312.410.482.510.528.402.28.542.28.568.152.28.292.38.318.182.48.322.48.348.682.78.832.88.859.563.19.723.29.7510.633.510.813.610.8411.944.012.144.112.1813.584.513.814.613.8515.245.015.495.115.5416.895.517.185.617.2318.566.018.876.118.9220.226.520.566.720.6221.887.022.257.222.3223.567.523.957.724.02200250σmaxσmax3.493.490.52.842.840.42.762.760.42.772.770.52.942.940.53.233.230.63.603.600.74.044.040.84.604.590.95.155.151.05.725.711.16.286.271.26.846.841.37.407.401.47.977.971.5断面係数断面2次モーメント4.3001.500.01502.255.5252.040.02043.576.7753.380.03387.597.9755.040.050413.900.01398.170.081728.600.028611.80.118049.400.049416.30.163080.900.080920.90.2090117.100.117026.50.2650166.700.167033.10.3310233.600.234040.60.4060316.400.316061.40.6140589.800.5900500600VσmaxVσmax2.510.492.510.172.32.28.542.28.282.12.38.292.38.042.22.48.322.48.072.32.88.832.88.562.63.29.723.29.433.03.610.823.610.493.54.112.154.111.783.94.613.824.613.404.45.115.505.115.034.95.617.195.616.675.46.118.886.118.305.86.720.576.719.946.37.222.267.221.596.87.723.967.723.247.4300σmax0.53.490.50.42.840.40.42.760.40.52.770.50.52.930.50.63.230.60.73.590.70.84.040.80.94.590.91.05.151.01.15.711.11.26.271.21.36.841.31.47.401.41.57.961.5施 工支承角θ有 効支承角2α0.1320.079 90゜ 60゜0.2230.0110.1200.079180゜ 90゜0.1600.0110.1070.079360゜120゜0.1210.01175100Vσmax0.68.251.710.022.31.06.721.68.162.11.26.531.67.922.11.56.551.77.952.32.06.951.98.442.62.57.652.29.293.03.08.512.510.333.43.59.562.911.603.84.010.873.213.204.34.512.203.614.814.85.013.523.916.425.25.514.854.318.035.76.016.184.619.656.26.517.525.021.276.77.018.865.422.897.2750.61.990.21.01.620.21.21.580.21.51.580.22.01.680.22.51.850.33.02.050.33.52.310.34.02.630.44.52.940.45.03.260.55.53.590.56.03.910.66.54.230.67.04.550.6σmax：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（％）◦基礎条件と係数◦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。最大曲げ応力とたわみ率の算定例〈T-25.有効支承角（2α）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。k1k2K3K4土被り（m）σmax土被り（m）σmax呼び径呼び径
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