Compute earthwork volume between two cross-sections from their end areas and spacing.
输入两端断面面积 A₁、A₂ 与间距 L,求体积。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Average end-area method | V = (A1 + A2)/2 · L | GB 50026-2020, Code for engineering surveying |
| Prismoidal formula | V = L/3 · ( A1 + A2 + sqrt(A1 · A2) ) | GB 50026-2020, Code for engineering surveying (earthwork volume) |
| Difference between the two | The average end-area method errs more as end areas differ; prefer the prismoidal formula then | GB 50026-2020, Code for engineering surveying |
| Units | Volume in cubic metres, area in square metres and spacing in metres | GB 50026-2020, Code for engineering surveying |