First answer the latter part: 150*15.8*15.8*0.015=road section length*road width (15+0.4*2 working surface width)*[road width*road cross slope]; 15.8 of them My understanding is that the working surface width of 0.4m is added to both sides.

I don’t understand the entire calculation formula, and I feel that the boundary conditions are missing:

1. The soil subgrade that requires shaping after excavation The cross slope of the road is generally road cross slope + 0.1%;

2. What is the excavation slope on both sides of the roadway, the conventional is 1:1.5;

3. The average excavation Does depth refer to the excavation depth at the center line of the road?

If the above boundary conditions are determined, calculating the amount of earthwork is a mathematical problem!

What are you talking about? I don’t know if you understand it correctly. Is there any Help!