Mobilized Cohesion Formula:
Definition: Mobilized Cohesion for Cohesive Soil is the effective shear strength contributed by cohesive soils when subjected to shear stresses.
Purpose: This calculator helps geotechnical engineers determine the mobilized cohesion based on stability number, soil unit weight, and depth.
The calculator uses the formula:
Where:
Explanation: The stability number multiplied by the unit weight and depth gives the mobilized cohesion at the specified depth.
Details: Proper calculation of mobilized cohesion is crucial for slope stability analysis, foundation design, and earth retaining structures.
Tips: Enter the stability number, unit weight of soil, and depth at which mobilized cohesion is considered. All values must be > 0.
Q1: What is a typical range for stability number?
A: Stability numbers typically range from 0.1 to 2.5 depending on slope geometry and soil conditions.
Q2: How accurate is this calculation?
A: The calculation has an accuracy of ±5% due to variability in soil properties and measurement uncertainties.
Q3: What affects the unit weight of soil?
A: Unit weight depends on soil type, moisture content, and degree of compaction.
Q4: Why is depth important in this calculation?
A: Cohesion typically varies with depth due to changes in overburden pressure and soil composition.
Q5: Can this be used for all soil types?
A: This formula is specifically for cohesive soils (clays). Different approaches are needed for granular soils.