问题一:
放坡系数1:0.67,坑底2.5m*2.5m,深度1.75m。放坡宽度=1.75*0.67=1.1725,
上口宽度=(2*1.1725+2.5)*(2*1.1725+2.5)=4.845m*4.845m
截方锥体体积=H/6《(2*a+a1)*b+(2a1+a)》*b1
代入:W=1.75/6《(2*2.5+4.845)*4.845+(2*2.5+4.845)*2.5》
=0.2917《9.845*4.845+9.845*2.5》
=0.2917《47.70+24.61》
=0.2917*72.31
=21.09
问题二:
自己慢慢算吧,我也不费脑子了,