壩基開挖工程量計算壩肩均為巖體體，按中間截面面積乘高度計算（截右岸247.8--275）上底面：A1=0A2=(6+9)*5/2=37.5m2H=275-247.8=27.2mV=H*(A1+A2)/2=27.2*(0+37.5)/2=510m3左岸247.8--270）上底面：A1=0A2=(6+12)*10/2=90m2H=275-247.8=22.2mV=H*(A1+A2)/2=22.2*(0+90)/2=999m3V上底面：A1=37.5m2A2=(7.4+11.9)*7.5/2=72.375m2H=247.8-225=22.8mV2=H*(A1+A2)/2=22.8*(37.5+72.375)/2=1252.575m3上底面：A1=90m2A2=(7.4+11.3)*6.5/2=60.775m2H=247.8-225=22.8mV2'=H*(A1+A2)/2=22.8*(90+60.775)/2=1718.835m3+1718.835=2971.41m2上底面：A1=72.375m2A2=(15.5+20.6)*8.5/2=153.425m2H=225-200=25mV=H*(A1+A2)/2=25*(72.375+153.425)/2=2822.5m3上底面：A1=60.775m2A2=(15.5+20)*7.5/2=H'=225-200=25m=H*(A1+A2)/2=25*(60.775+133.125)/2=2423.75m3=2822.5+2423.75=5246.25m2上底面：A1=153.425m2A2=(23.5+28.5)*8.5/2=221.425m2本層高差：H=200-175=25mV4=H*(A1+A2)/2=25*(153.425+221.425)/2=4685.625m3上底面：A1=133.125m2A2=(23.5+28)*7.5/2=193.125m2H=225-200=25mV4'=H*(A1+A2)/2V4''=V4+V4'=4685.625+4078.1上底面：A1=0m2A2=(28.6+31)*4/2=119.2m2H=225-200=25mV4=H*(A1+A2)/2=25*(0+119.2)/2=1490m3上底面：A1=0m2A2=(28+34.6)*11/2=344.3m2H=200-175=25mV4'=H*(A1+A2)/2=25*(0+344.3)/2=4303.75m3上底面：A1=221.425m2A2=(28.4+38)*16/2=531.2m2本層高差：H=175-160=15mV5=H*(A1+A2)/2=15*(221.425+531.2)/2=5644.688m3上底面：A1=193.125m2A2=(28.4+41.9)*22.5/2=790.875m2本層高差：H=175-160=15mV=H*(A1+A2)/2=15*(193.125+790.875)/2=7380m3V=V5+V5'=5644.688+上底面：A1=208.6m2A2=(38+40.4)*4/2=156.8m2本層高差：H=175-160=15mV5=H*(A1+A2)/2=15*(208.6+156.8)/2=2740.5m3上底面：A1=344.3m2A2=(41.9+44.9)*5/2=217m2本層高差：H=175-160=15mV=H*(A1+A2)/2=15*(344.3+217)/2=4209.75m3VV5+V5'=2740.5+4209.75=6950.25m2A1=(41+32)*9/2=328.5m2V6=H*A1=43*328.5=14125.5m3左右剖面梯形：下底寬37.4m,A1=(39.9+37.4)*2.5/2=96.925m2V=H*A1=43*96.6