H1H2H3H4H2H4H3H1H2H4H3H1H2H4H3H1零线零线aaaaaaaabbc1.填方四棱柱体； T=a(H1+H2+H3+H4)/4挖方四棱柱体：W=a（H2+H2+H3+H4）/4梯形棱体； T=(b+c)（H3+H4）/8w=（2a-b-c）（H1+H2）/84.五棱体.三棱体； T=（a2-bc）（H1+H2+H4）/5 W=bcH3/3c方格网土方算量计算公式22