镇墩结构计算书精

1号压力管道镇墩结构计算书一、设计依据及参考资料(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二、设计基本资料弓I用流量*~^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^w^wQ=1.620m3/s水的 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^~丫^^^1^^Ot/m^ 的重~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Ys=7.85t/m3上游钢管内径 D0=0.880m下游钢管内彳径 D=0.880m上游钢官夕卜彳径 D1=1.000m下游钢官夕卜彳径 D2=1.000m上游伸缩节处的管内径 D01=1.150m下游伸缩节处的管内径 D02=1.150m上游钢管轴线倾角~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~a1=0.000°下游钢'管'轴线彳^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^~a2^4700°上游钢计算长〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜L1=24.500m下游钢管计算长度〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜L2=10.700m镇墩与上游相邻支墩的距^~^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^W^~11=4 100m镇墩与下游相邻支墩的距离 l2=10.700m钢管转弯处的水头 H0=22.500m上游伸缩节处的水头 H1=22.500m下游伸缩节处的水头

H2=22.000m上游计算管段的水头损失 hw1=0.100m下游计算管段的水头损失〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜hw2=0.300m下游计算管段的水头损失〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜hw2=0.300m伸缩节止水填料与钢管的摩擦系数 fk=0.3伸缩节止水填料长度〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜b=0.200m伸缩节止水填料长度〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜b=0.200m钢管与支墩的摩擦系数 f=0.3三、轴向力计算1、钢管自重的轴向分力计算公式:A1=gt.L.sina式中:gt=(D12-D02.3.14.ys/4YsL疝qDIAl上淅（AD7.的24.500m'o:0.8S&jh1.MOb1«390t/n0,Mt下游（A1"）7.S510.700m0.0S193S510.88-Oin1.OOOjii1.390t/m1.21%:2、钢管转弯处的内水压力计算公式:2YsLDU上游（AD7.8524.50OiQ:0.8SDm下游(Al")7.B510.7口ftm0.081^38510.880m3、伸缩节边缘处的水压力计算公式:22

丫sLDODI上游(AD7.8524.500m0.8S0m1.000b下游(A1")7.S510.7口面0.081936510.880m1.00On4、水流对管壁的摩擦力计算公式:2YsLDO上游CA37.8524.50(hnQ:0.8S0m下游(Al")7.B510.70ftli0.081^38510.S80m5、温度变化时伸缩节填料的摩擦力计算公式:A5=D01.b.fk.Yw.H.3.14YsL缶i】4DODI钟上游CAD7.8524.500m-0 :0.SSthn1.gg1.390t/in下游(A1")7.S510.700m0.0B193S51口.58Dm1.DGOa1.390t/in6、温度变化时钢管与支墩的摩擦力计算公式:A6=f.(Qp+QwcosaYsLsinCtDODI上游CAD7.8524.50Om00.8S0ni1.000b7、水在弯管处的离心力计算公式:22DOywVA7上,游（A7,）380m1.00t?in：2.&65nL/s0.441f下游(A7,r)0.SBOiil1.DOt/in：2.&65m/s0.441t8、钢管内径变化的（渐缩管内水压力计算公式:22DOyvVAT上游CAT）0.8S0n1.00t/n：2.665n/s0.441t四、法向力计算1、管重产生的法向力Qp计算公式:Qp=gt.L.cosaDOyvVA7上游（A7）0.SBOn1.00tW2.665n/s0.441t下游（A7r）CL8S0n1.DOt/ni：2.665m/s0.441t2、水重产生的法向力Qw计算公式:Qw=gw.L.cosaDOyYVA7上淅CAT）C.SBOn1.002.665ul/s0.441t下游(A7ir)68B0n1.OOf/ii*2.665m/s0.441t五、合力计算1、轴向合力计算（顺水流方向为+（垂直向下为十

DOVAl上游CAT)0.880m1.DOt/mH2.665m/s0.441t下游(A7r)D.SBOjil1.口。田2.：665in/s0.4411DODywHASAS0.850m0.8S0m],口Ol/nP22,500m0.MOtDOyvVA7上游CAT)0.SBQni1.00t/ma2.665ia/s0.441t温度下降1,2L9t-13.678t466t4.767t-0,4411温月吓浦合力-26.949t温降下游合力-IT.41&t温度下降L2L9t-13.678t46610.1S214.767t-0,4411o.ooot湘J吓游合力-2&.94稣温降下游合力-1^4164温升£Y1温升上海合力Ksincr1O.ODOt温升下游合力Jisinoi2-2,20St-2,2081温度下降1.219t-13.673t-9.466t0.182t4.767t温月吓游合力-26.钢91