What Is the Driven Pile Static Axial Compressive Capacity Calculator?
Driven pile static capacity calculates the axial compression load a deep foundation pile can support safely.
How Does the Driven Pile Static Axial Compressive Capacity Calculator Work?
Sums the tip end-bearing area resistance and circumferential shaft skin friction.
Driven Pile Static Axial Compressive Capacity Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Q_{ ext{ult}} = Q_b + Q_s = q_b A_b + f_s (pi D L), quad Q_{ ext{all}} = rac{Q_{ ext{ult}}}{ ext{FS}}
Static equilibrium of deep foundation axial bearing and shaft friction resistance.
How to Use the Driven Pile Static Axial Compressive Capacity Calculator
- Enter pile diameter, embedment depth, unit tip bearing capacity qb, and average unit shaft resistance fs.
Step-by-Step Example Calculation
Precast Concrete Pile in Sand and Gravel
Input Values:
pileDiameterM:0.5
pileEmbedmentLengthM:18
unitEndBearingKPa:4500
averageSkinFrictionKPa:55
Worked Steps: Ultimate capacity Q_ult = 2,438 kN (884 kN base + 1,555 kN shaft); allowable load Q_all = 975 kN (FS = 2.5).
Understanding Your Result
Outputs ultimate capacity and design allowable working load using a safety factor of 2.5.
Factors That Affect the Result
- Soil layering, group action in closely spaced pile caps, and negative skin friction from settling clay.
When Should You Use This Calculator?
- Bridge piers, offshore platforms, high-rise tower foundations over soft soils.
Assumptions & Limitations
- Applies single isolated vertical pile; group efficiency effects must be applied for pile clusters.
Frequently Asked Questions
Calculation Accuracy & Reference Note
Standard static axial pile capacity formulation.