地坑体积计算公式推导:
V=(a+2c+KH)(b+2c+KH)H +4/3K
2
H
3
-K
式中
4/3K
为四个锥角的体积,而
(a+2c+KH)(b+2c+KH)H 包含长方体 K
,所以
要减去
K
,得出
V=(a+2c+KH)(b+2c+KH)H +1/3K