Where: h- cap height b- cap top area B- cap bottom area.
The following is the professional knowledge of foundation pile caps:
1, quantity of pile cap foundation
(1) Volume of cushion for pile cap foundation (2) Volume of cushion for pile cap foundation (3), formwork for cushion for pile cap foundation (4), formwork for pile cap foundation (5) Earthwork volume of foundation pit (6) Drilling and exploration quantities at the bottom of trench.
2. Manual calculation method of independent foundation
(1), the volume of cushion layer of pile cap foundation.
Cushion volume = cushion area × cushion thickness
[2] Formwork for cushion layer of pile cap foundation
Cushion template = cushion perimeter × cushion height
(3) Volume of pile cap foundation
Independent foundation volume = added volume per floor (using cuboid and frustum formula)
(4), pile cap foundation template
Independent foundation formwork = perimeter of each floor × height of each floor formwork
(5) Earth volume of foundation pit
The earthwork volume of foundation pit is calculated by multiplying the bottom area of foundation pit by the excavation depth. The area of the foundation pit bottom should be multiplied by the width of the foundation pit bottom. The length and width of the foundation pit bottom refers to the outer line of the concrete cushion plus the working face. If there is a drainage ditch, it should be counted as the outer line of the drainage ditch. The volume of drainage ditch should be included in the total earthwork. When sloping is needed, the earthwork volume of sloping should be merged into the total earthwork volume.
(6) Drilling quantities at the bottom of the trough
The drilling volume at the bottom of the trough is calculated according to the area of the trough bottom.
1, calculation difficulty of pile cap foundation engineering quantity
(1) The foundation volume of special-shaped pile caps is not easy to calculate.
(2) When the pile cap foundation intersects with other foundations, the deduction is not easy to calculate.
(3) When calculating earthwork, the working face and slope should be considered, and it is more troublesome to calculate the deduction.