【《某水库面板坝工程中坝坡稳定分析计算过程案例》4600字】

某水库面板坝工程中坝坡稳定分析计算过程案例根据《混凝土面板堆石坝设计规范》（SL288-2013）规定，本毕业设计坝基有5m～10m的河床砂砾卵石层，故对坝坡进行稳定计算，参照规定，采用不计条块间作用力的瑞典圆弧法计算。1）计算工况本毕业设计建筑物最高级别为5级，设计烈度采用基本烈度为6度，可不进行抗震计算。根据《碾压式土石坝设计规范》（SL274-2001）和本毕业设计的实际情况，坝坡稳定计算主要考虑了以下工况。正常运用条件一：水库水位处于正常蓄水位下的稳定渗流期下游坝坡稳定；正常运用条件二：上游为设计洪水位，下游相应水位时下游坝坡的稳定；正常运用条件三：水库水位从正常蓄水位降落至表孔堰顶高程相应水位时上游坝坡稳定；非常运用条件一：完建期上游坝坡稳定；非常运用条件二：上游为校核洪水位，下游相应水位时下游坝坡的稳定；非常运用条件三：水库水位由校核洪水位降落至正常蓄水位时上游坝坡的稳定；非常运用条件四：水库水位由正常蓄水位降落至死水位时上游坝坡的稳定。计算方法采用不计条块间作用力的瑞典圆弧法计算，各材料的计算参数指标见表1.10。表5-10坝坡稳定计算参数表材料容重γ（kN/m3）凝聚力C（MPa）摩擦角φ（°）堆石料19.60.1538.6垫层料20.20.1039.8坝基砂砾石20.0030.0坝基基岩22.50.548.0混凝土面板、趾板24.00.348.02）计算方法和计算参数按照《碾压式土石坝设计规范》（SL274-2001），本坝为混凝土面板堆石坝，采用：①总应力法（5-8）式中：K——整个滑体剩余下滑力计算的安全系数；l——单个土条的滑动面长度(m），l=bsecθ；W——条块重力（kN），浸润线以上取重度，以下取饱和重度；θ——条块的重力线与通过此条块底面中点半径中间的夹角（度）；C、φ——土的抗剪强度指标，采用总应力法时，取总应力指标，采用有效应力法时，取有效应力指标。②有效应力法（5-9）式中：K——整个滑体剩余下滑力计算的安全系数；l——单个土条的滑动面长度(m），l=bsecθ；W——条块重力（kN），浸润线以上取重度，以下取饱和重度；U——条块所受到的浮力（kN）；D——条块所受的渗透力（kN），据孔隙水压力梯度场积分得出；θ——条块的重力线与通过此条块底面中点半径中间的夹角（度）；α——条块的渗透力与水平线的夹角（度）；C、ψ——土的抗剪强度指标，采用总应力法时，取总应力指标，采用有效应力法时，取有效应力指标。3）计算成果面板坝坝坡稳定计算成果见表5-11。表5-11坝坡稳定计算成果表部位工况最小安全系数K规范允许值【K】下游坝坡正常运用条件一2.1981.24正常运用条件二2.0991.24非常运用条件二2.0311.15上游坝坡正常运用条件三4.5371.24非常运用条件一2.4571.15非常运用条件三1.1691.15非常运用条件四2.4131.15由表1.6-27可知，各种工况组合情况下混凝土面板堆石坝坝坡稳定安全系数均满足规范要求。各工况下坝体画面信息计算成果如下图：[土条详细表]表中符号意义:i——土条编号x——起始x(m)l——土条底长(m)α——土条底部倾角(度)c——土条底部粘聚力(kPa)φ——土条底部内摩擦角(度)W——土条重(kN)N——土条底部法向力(kN)T——土条底部切向力(kN)Er——土条右侧法向力(kN)Xr——土条右侧切向力(kN)Px——水平超载(kN)Py——竖向超载(kN)Sx——水平静水压力(kN)Sy——竖向静水压力(kN)U——孔隙压力(kN)Q——自重产生的水平地震力(kN)J——筋带力(kN)ti——超载在滑弧切线方向上产生的水平地震力(kN)Qv——自重产生的竖向地震力(kN)正常运用条件一滑动安全系数:2.198********************滑面信息*******************土条总数:24圆心半径(m):(26.503,93.600)R=93.600ixlαcφWNTErXrPxPySxSyUQJtiQv14.094.69-12.42141.031.6180.03473.57309.64404.240.000.000.000.000.00473.570.000.000.000.0028.674.65-9.56141.031.6573.20639.40347.42853.050.000.000.000.000.00514.230.000.000.000.00313.254.61-6.73141.031.6943.981003.95454.221421.730.000.000.000.000.00544.310.000.000.000.00417.834.59-3.91141.031.61304.561341.29552.202064.330.000.000.000.000.00580.600.000.000.000.00522.424.58-1.10141.031.61616.891629.16624.452719.910.000.000.000.000.00640.680.000.000.000.00627.001.001.84141.031.61924.551903.01703.223361.810.000.000.000.000.00757.590.000.000.000.00732.001.124.93141.031.62114.022058.03740.723922.790.000.000.000.000.00821.110.000.000.000.00837.101.158.08141.031.62408.322317.33813.994403.090.000.000.000.000.00861.970.000.000.000.00942.201.2011.25141.031.62671.152549.66879.764768.720.000.000.000.000.00902.300.000.000.000.001047.301.2714.45141.031.62903.262757.65943.014993.780.000.000.000.000.00929.630.000.000.000.001152.401.3517.70141.031.63101.292939.761004.275056.680.000.000.000.000.00941.310.000.000.000.001257.501.3620.98141.031.63031.012878.32991.804952.230.000.000.000.000.00918.450.000.000.000.001362.501.1024.18141.031.62780.822644.45921.554713.450.000.000.000.000.00836.200.000.000.000.001467.151.2427.34141.031.62862.952740.86966.694313.210.000.000.000.000.00834.230.000.000.000.001571.801.4130.60141.031.62936.152856.24986.933708.720.000.000.000.000.00921.410.000.000.000.001676.461.6133.97141.031.62972.612951.951001.802893.310.000.000.000.000.001000.710.000.000.000.001781.111.8637.48141.031.62963.733017.361021.301870.720.000.000.000.000.001057.500.000.000.000.001881.760.9139.56141.031.6479.92491.45169.241681.680.000.000.000.000.00159.800.000.000.000.001986.460.2639.91141.031.6131.79140.5548.141632.430.000.000.000.000.0041.590.000.000.000.002086.668.7142.66141.031.63881.644101.311446.30-81.850.000.000.000.000.001428.750.000.000.000.002193.060.5741.50141.031.6221.16238.9387.30-191.080.000.000.000.000.0086.530.000.000.000.002293.468.7248.34141.031.62833.633080.671228.58-1680.050.000.000.000.000.001074.940.000.000.000.002399.259.8754.03160.336.92007.912010.041181.08-2613.090.000.000.000.000.00661.400.000.000.000.0024101.0511.8360.67296.441.9763.35156.511596.16-1967.700.000.000.000.000.00156.510.000.000.000.00正常运用情况二滑动安全系数:2.099********************滑面信息*******************土条总数:24圆心半径(m):(24.903,91.300)R=91.300ixlαcφWNTErXrPxPySxSyUQJtiQv13.614.77-11.47141.031.6183.91496.72329.67421.890.000.000.000.000.00496.720.000.000.000.0028.294.73-8.62141.031.6581.37647.03364.85879.560.000.000.000.000.00531.340.000.000.000.00312.974.70-1.78141.031.6963.621017.00479.541459.110.000.000.000.000.00562.990.000.000.000.00417.654.68-2.96141.031.61330.891362.89584.782113.470.000.000.000.000.00596.700.000.000.000.00522.324.68-0.15141.031.61650.051651.73661.692779.350.000.000.000.000.00658.730.000.000.000.00627.001.012.77141.031.61919.481886.52728.833416.300.000.000.000.000.00763.170.000.000.000.00732.001.131.81141.031.62106.382039.75763.043968.860.000.000.000.000.00840.500.000.000.000.00837.101.168.91141.031.62402.692303.48824.174426.520.000.000.000.000.00932.240.000.000.000.00942.201.2212.02141.031.62670.282544.00881.844759.000.000.000.000.000.001014.210.000.000.000.001047.301.2911.18141.031.62901.342759.67937.354940.950.000.000.000.000.001081.270.000.000.000.001152.401.3818.39141.031.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