1. List rules:

① Calculate the excavation area:

Method 1. Use the building area of ??the ground floor + the outer skin of the exterior wall to the outer skin of the cushion area. Calculation of the area from the outer edge of the exterior wall to the outer edge of the cushion (calculated according to the external graphics of the external edge of the external wall into blocks or calculated according to "the center line of the external graphics × the external length".)

Method 2 , Calculate the area of ??the outer edge of the cushion in blocks (the same as calculating the building area in blocks).

② Calculate the volume of the excavated earth: Volume of the earth = bottom area of ??the excavated earth * depth of excavation.

2. Quota rules:

Use the prism volume formula to calculate the upper and lower bottom areas of the excavation. V=1/6×H×(S top + 4×S middle + S bottom) to calculate the earth volume (where S top is the upper bottom area, S middle is the mid-section area, and S bottom is the bottom bottom area).

S lower = the building area of ??the ground floor + the area from the outer skin of the exterior wall to the bottom edge of the excavation (including working surface, drainage ditch, grading, etc.). Calculate Smid and Sbottom in the same way.