Define Static and Dynamic Formula in Pile Foundation

Static formulae are used both for bored and driven piles. Dynamic formulae are used for driven piles. Load testing is the most reliable method to determine the load capacity of the pile in the field. Dynamic pile formulas are widely used to determine the static capacity of the driven pile. These formulas are derived starting with the relation.

Energy Input = Energy Used + Energy Lost.

The static resistance is obtained by subtracting the dynamic component from the total soil resistance. The dynamic component is computed as the product of the pile velocity times a soil parameter called the Damping Factor. The damping factor is related to soil grain size.

Static formulae are used to determine the load capacity of piles. The load capacity of a pile is the maximum load that can be applied to the pile without causing failure. The load capacity of a pile is determined by the strength of the soil and the pile. The strength of the soil is determined by the soil type, the soil density, and the soil moisture content. The strength of the pile is determined by the pile material, the pile cross-sectional area, and the pile length. Static formulae are used to determine the load capacity of piles by analyzing the soil and pile strength.

Dynamic formulae are used to determine the load capacity of driven piles. Driven piles are piles that are installed by driving them into the ground. Dynamic formulae are used to determine the load capacity of driven piles by analyzing the energy input into the pile and the energy lost during pile driving. The energy input into the pile is the energy that is used to drive the pile into the ground. The energy lost during pile driving is the energy that is lost due to soil resistance and other factors.

In summary, static formulae are used to determine the load capacity of piles, while dynamic formulae are used to determine the load capacity of driven piles. Load testing is the most reliable method to determine the load capacity of the pile in the field. The damping factor is related to soil grain size and is used to compute the dynamic component of the pile resistance. The static resistance is obtained by subtracting the dynamic component from the total soil resistance.