重力式挡土墙计算书

1、重力式挡土墙计算书（一）4.8m挡土墙计算毛石容重不小于20KN/m Ka=13 采用毛石MU30， M7.5水泥砂浆主动土压力=18/3x4.8=28.8KN/m 地面活=10/3=3.33 KN/m1、抗倾覆验算：示意图=70 =0.5=0.5x30=15 0=12G1=53.85KN G2=79.0KN G3=13.97KN G4=3.47KNEa=（3.33+3.33+28.8）x4.8/2=85.1KNEax=Easin-=69.7KNEaz=Eacos-=48.8KNzf=1.75-0.61=1.14m xf=3.06-1.75cot=2.423mGnXn+EazxfEaxzf=5

2、3.85x0.895+79x1.866+13.97x0.635+3.47x0.846+48.8x2.42369.7x1.14=4.141.6抗倾覆稳定满足要求2、抗滑移稳定验算：示意图=70 =0.5=0.5x30=15 0=12 =0.4G1=53.85KN G2=79.0KN G3=13.97KN G4=3.47KNGn=150.29KNGn=cos 0Gn=147KNGt= sin 0Gn=31.2KNEa=（3.33+3.33+28.8）x4.8/2=85.1KNEat=Easin-0-=58.0KNEan=Eacos-0-=62.2KNGn+EanEat-Gt=209.2x0.426

3、.8=3.121.3抗滑移稳定性满足要求3、地基承载力验算：Gnk=150.29KNn=1、2、3、4 Gk围墙=12.72KNNk=Gnk+Gk围墙=163.01KNc=GnXn+Gk围墙x+Eazxf-EaxzfNk=53.85x0.895+79x1.866+13.97x0.635+3.47x0.846+12.72x0.895+48.8x2.423-69.7x1.14163.01=1.58me=|B/2-1.58|=0.05mB/6=0.51m小偏心受压pk=163.013.06x1=53.3kpafa=105kpamaxk=Pk1+6eb=61kpa1.2famink=Pk1-6eb=4

4、5.9kpa地基承载力满足要求4、墙身强度验算：示意图验算离墙顶2.4m处截面-的应力截面-以上主动土压力Ea1=（3.33+3.33+14.4）x2.4/2=25.3KN/m截面-以上挡土墙自重G1=36KN G2=21.48KN Gk围墙=12.72KN截面-以上法相总压力N1k=36+21.48+12.72=70.2KNN1作用点离O1点距离c1=GnXn+Gk围墙xN1k=36x0.44+21.48x1.168+12.72x0.4470.2=0.662mE1=|1.765/2-0.662|=0.221mB/6=0.294m截面-以上法向相应力pk=70.21.765x1=40kpama

5、xk=Pk1+6eb=70kpa0.69MPa（MU30 M7.5水泥砂浆）mink=Pk1-6eb=9.9kpa截面-面上的剪应力=Ea1-（G1+G2+Gk围墙）fB1=25.3-36+21.48+12.72x0.61.7651.6抗倾覆稳定满足要求2、抗滑移稳定验算：示意图=68 =0.5=0.5x30=15 0=11 =0.4G1=31.8KN G2=48.62KN G3=10.44KN G4=2.20KNGn=93.06KNGn=cos 0Gn=91.35KNGt= sin 0Gn=17.75KNEa=（3.33+3.33+21.9）x3.65/2=51.16KNEat=Easin-

6、0-=34.23KNEan=Eacos-0-=38.0KNGn+EanEat-Gt=129.35x0.416.48=3.131.3抗滑移稳定性满足要求3、地基承载力验算：Gnk=93.06KNn=1、2、3、4 Gk围墙=12.72KNNk=Gnk+Gk围墙=105.78KNc=GnXn+Gk围墙x+Eazxf-EaxzfNk=31.8x0.743+48.62x1.525+10.44x0.522+2.2x0.695+12.72x0.743+31.3x1.94-41.67x0.86105.78=1.31me=|B/2-1.31|=0.065mB/6=0.415m小偏心受压pk=1052.49x1

7、+9=51.2kpafa=105kpamaxk=Pk1+6eb=59.2kpa1.2famink=Pk1-6eb=43.2kpa地基承载力满足要求4、墙身强度验算：示意图验算离墙顶1.825m处截面-的应力截面-以上主动土压力Ea1=（3.33+3.33+10.95）x1.825/2=16.1KN/m截面-以上挡土墙自重G1=21.9KN G2=13.21KN Gk围墙=12.72KN截面-以上法相总压力N1k=21.9+13.2+12.72=47.82KNN1作用点离O1点距离c1=GnXn+Gk围墙xN1k=21.9x0.392+13.2x0.933+12.72x0.39247.82=0.541mE1=|1.415/2-0.541|=0.167mB/6=0.236m截面-以上法向相应力pk=47.821.415x1=33.8kpamaxk=Pk1+6eb=57.7kpa0.69MPa（MU30