镇墩结构计算书(Excel)

三、轴向力计算1、钢管自重的轴向分力上游伸缩节处的水头~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~H1=计算公式：A1=gt.L.sinα144.200m下游伸缩节处的水头~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~H2=1.000m0.3引用流量~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Q=8.600m³/s镇墩与上游相邻支墩的距离~~~~~~~~~~~~~~~~~~~~~~~~~~~l1=镇墩与下游相邻支墩的距离~~~~~~~~~~~~~~~~~~~~~~~~~~~l2=6.000m0.150m钢管与支墩的摩擦系数~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~f=上游计算管段的水头损失~~~~~~~~~~~~~~~~~~~~~~~~~~~hw1=伸缩节止水填料与钢管的摩擦系数~~~~~~~~~~~~~~~~~~~~~fk=伸缩节止水填料长度~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~b=0.3上游钢管轴线倾角~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~α1=下游钢管轴线倾角~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~α2=9.468m138.138m51.000m钢管转弯处的水头~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~H0=6.000m上游伸缩节处的管内径~~~~~~~~~~~~~~~~~~~~~~~~~~~~~D01=1.600m上游钢管内径~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~D0=上游钢管外径~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~D1=下游钢管内径~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~D=下游钢管外径~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~D2=1.632m1.600m二、设计基本资料121.990m上游钢管计算长度~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~L1=下游钢管计算长度~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~L2=0.98t/m³18.450°39.810°1.632m1.632m一、设计依据及参考资料下游计算管段的水头损失~~~~~~~~~~~~~~~~~~~~~~~~~~~hw2=0.100m钢材的重度~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~γs=7.85t/m³水的重度~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~γw=　　（1）设计依据：《水电站压力钢管设计规范》（SL281—2003）　　（2）参考资料：《水电站》（河海大学刘启钊主编）分段式压力管道镇墩结构计算书下游伸缩节处的管内径~~~~~~~~~~~~~~~~~~~~~~~~~~~~~D02=1.632mγsLsinαD0D1gtA1上游（A1'）7.8551.000m0.316476971.600m1.632m0.637t/m10.287t下游（A1''）7.859.468m0.640243781.600m1.632m0.637t/m3.863tD0γwH0A2上游（A2'）1.600m0.98t/m³138.138m272.050t下游（A2''）1.600m0.98t/m³138.138m272.050tD01D0γwHA3上游（A3'）1.632m1.600m0.98t/m³121.990m9.706t下游（A3''）1.632m1.600m0.98t/m³144.200m11.473tD0γwhwA4上游（A4'）1.600m0.98t/m³1.000m1.969t下游（A4''）1.600m0.98t/m³0.100m0.197tD01bfkγwHA5上游（A5'）1.632m0.150m0.30.98t/m³121.990m27.568t下游（A5''）1.632m0.150m0.30.98t/m³144.200m32.588tfQpQwαA6上游（A6'）0.332.504t100.440t18.450°37.833t计算公式：A7=D02.γw.V2.3.14/4g4、水流对管壁的摩擦力计算公式：A4=D02.γw.hw.3.14/4计算公式：A5=D01.b.fk.γw.H.3.146、温度变化时钢管与支墩的摩擦力计算公式：A6=f.(Qp+Qw)cosα7、水在弯管处的离心力式中：gt=（D12-D02）.3.14.γs/43、伸缩节边缘处的水压力计算公式：A3=(D012.-D02).γw.H.3.14/45、温度变化时伸缩节填料的摩擦力2、钢管转弯处的内水压力计算公式：A2=D02.γw.H0.3.14/4D0γwVA7上游（A7'）1.600m0.98t/m³4.279m/s3.680t下游（A7''）1.600m0.98t/m³4.279m/s3.680tD0DγwHA8A81.600m1.600m0.98t/m³138.138m0.000tgtLαcosαQp上游（Qp'）0.637t/m318.450°0.948600191.814t下游（Qp''）0.637t/m339.810°0.768171791.469tgwLαcosαQw上游（Qw'）1.969t/m318.450°0.948600195.605t下游（Qw''）1.969t/m339.810°0.768171794.539t上游轴向力A1'A2'A3'A4'A5'A6'A7'温度上升10.287t272.050t9.706t1.969t27.568t37.833t3.680t温度下降10.287t272.050t9.706t1.969t-27.568t-37.833t3.680t温升上游合力温降上游合力下游轴向力A1A2A3A4A5A7A8温度上升3.863t-272.050t-11.473t0.197t-32.588t-3.680t0.000t温度下降3.863t-272.050t-11.473t0.197t32.588t-3.680t0.000t温升下游合力温降下游合力四、法向力计算8、钢管内径变化的(渐缩管)内水压力计算公式：A8=(D02-D2)γw.H.3.14/41、轴向合力计算(顺水流方向为+)(垂直向下为+)363.094t五、合力计算1、管重产生的法向力Qp计算公式：Qp=gt.L.cosα2、水重产生的法向力Qw计算公式：Qw=gw.L.cosα232.291t-315.731t-250.556t温升∑Y1114.911t-202.145t-87.234t温升∑X344.431t-242.536t101.895t温降∑Y173.515t-160.41664-86.902t温降∑X220.351t-192.470t27.882t下游合力7.037t上游合力4.615t0.55399.795t163.964t∑Y22、法向合力计算(垂直向下为+)(Qp'+Qw')xcosα1=(Qp''+Qw'')xcosα2=11.652t抗滑安全系数……………………………………………………Kc=1.75六、镇墩设计计算1、抗滑稳定计算计算公式：Kc=fz(∑Y+G)/∑XG=Kc∑X/fz-∑Y温升下游合力xsinα2温降下游合力xcosα2温升上游合力xsinα1温升上游合力xcosα1温降上游合力xsinα1温降上游合力xcosα1镇墩与地基的摩擦系数……………………………………………fz=温升下游合力xcosα2温降下游合力xsinα2温升时镇墩需要的重量温降时镇墩需要的重量G