Introduction: Formulas Flashcards
1
Q
What is the formula for groundwater uplift pressure?
A
σw=ρw×g×h
Where:
𝜎𝑤= uplift pressure (kN/m²)
𝜌𝑤= water density (1000 kg/m³ for fresh water)
𝑔 = gravity (9.81 m/s²)
ℎ= depth under the phreatic level (m)
2
Q
How do you calculate the void ratio?
A
e= V𝑣/𝑉𝑠
Where:
𝑒= void ratio
V𝑣= volume of voids
𝑉𝑠= volume of solids
3
Q
How do you calculate the porosity of soil?
A
n= V𝑣/𝑉t
Where:
𝑛= porosity
𝑉𝑣= volume of voids
𝑉𝑡= total volume
4
Q
What is the formula for soil density?
A
ρ= Volumeofsoil/Massofsoil
