Datasoil Bearing Capacity

GEOGRAPHY & CARTOGRAPHY CALCULATOR Datasoil Bearing Capacity A precise tool.
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What is the Datasoil Bearing Capacity & How does it work?
Terzaghi’s bearing capacity theory provides a simple yet powerful way to estimate the ultimate load a shallow foundation can support before shear failure in the soil. It separates the contribution of soil cohesion, over‑burden stress, and the geometry of the footing into three distinct terms, each multiplied by a bearing‑capacity factor that depends on the soil’s internal friction angle. The bearing‑capacity factors (N_c), (N_q) and (N_gamma) are derived from limit‑equilibrium analysis of a failure mechanism beneath the footing. As the friction angle (phi) increases, the soil’s ability to mobilize shear resistance grows, raising the values of these factors and consequently the ultimate bearing capacity. In practice, engineers input measurable soil parameters – cohesion (c’), unit weight (gamma), foundation width (B), embedment depth (D) and friction angle (phi) – into Terzaghi’s equation. The result, (q_{text{ult}}), is compared against the applied pressure to ensure a safe and economical foundation design.
q_{text{ult}} = c’ N_{c} + gamma D N_{q} + frac{1}{2} gamma B N_{gamma}
c’ = cohesion (kPa)
gamma = unit weight (kN/mΒ³)
D = embedment depth (m)
B = foundation width (m)
phi = friction angle (Β°)
N_c, N_q, N_gamma = bearing‑capacity factors
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Parameters
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Frequently Asked Questions
What are the three terms in Terzaghi’s bearing capacity equation?
The three terms are soil cohesion, over-burden stress, and the geometry of the footing.
How do the bearing-capacity factors Nc, Nq, and Ng depend on the soil?
These factors depend on the soil’s internal friction angle, which is derived from limit-equilibrium analysis.
What does shear failure in the soil mean?
Shear failure occurs when the soil can no longer support the load and begins to deform or slide.
Can this calculator be used for deep foundations as well?
No, this calculator is specifically designed for shallow foundations. For deep foundations, different methods are required.
What is the significance of over-burden stress in the calculation?
Over-burden stress represents the weight of the soil above the foundation and affects its bearing capacity.
How do I determine the internal friction angle of the soil?
The internal friction angle can be determined through soil testing methods such as direct shear tests or triaxial compression tests.
What is the role of geometry in the footing’s bearing capacity?
The geometry of the footing affects how it distributes load into the soil, influencing its overall bearing capacity.

Results are for informational purposes only and do not constitute professional advice.