1. What is Net Ultimate Bearing Capacity?

Net Ultimate Bearing Capacity is the minimum net pressure intensity causing shear failure in soil. It represents the maximum pressure that the soil can withstand without failure when considering the angle of inclination.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( q_{nf} \) — Net Ultimate Bearing Capacity (Pa)
• \( \gamma \) — Unit Weight of Soil (kN/m³)
• \( D \) — Depth of Footing (m)
• \( i \) — Angle of Inclination to Horizontal in Soil (radians)

Explanation: This formula calculates the bearing capacity considering the soil weight, foundation depth, and the angle of inclination from horizontal.

3. Importance of Bearing Capacity Calculation

Details: Accurate bearing capacity calculation is crucial for foundation design, ensuring structural stability and preventing soil failure under applied loads.

4. Using the Calculator

Tips: Enter unit weight of soil in kN/m³, depth of footing in meters, and angle of inclination in radians. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the angle of inclination?
A: The angle of inclination affects the shear strength and stability of the soil, influencing the overall bearing capacity of the foundation.

Q2: How does depth affect bearing capacity?
A: Generally, deeper foundations have higher bearing capacity due to increased confining pressure and soil strength with depth.

Q3: What are typical values for unit weight of soil?
A: Unit weight typically ranges from 16-22 kN/m³ for most soils, with higher values for dense soils and lower values for loose soils.

Q4: When is this formula applicable?
A: This formula is specifically used when considering the effect of inclination angle on bearing capacity in foundation design.

Q5: Are there limitations to this equation?
A: This simplified formula may not account for all soil conditions and should be used with appropriate safety factors in practical applications.