How to calculate the earthwork quantity of pile foundation engineering

You ask the formula for calculating the enlarged head of manual digging pile. Some sites don't dig the magnifying head, so you have to calculate it for him if he digs it. If you don't dig, you don't have to give it to him I won't write the volume formula of the pile, only give you the calculation formula of the magnifying head.

The enlarged head consists of three geometric bodies, the spherical crown of a circular platform cylinder.

The frustum of a cone v = (r1* r1+R2 * R2+r1* R2) * 3.14 * h/3.

R 1 R2 is the diameter of the upper and lower circles.

You can write a column, not a column.

Crown V=2/3*H*R*R*3. 14/4

This is an approximate formula used in engineering. It is too much trouble to use the standard formula of spherical cap, so this formula is used.

H is the crown height and r is the crown diameter.

You can use this formula to calculate for him.