1. What is Load Per Unit Length for Pipes?

Definition: This calculator estimates the load per unit length that a pipe resting on undisturbed ground on cohesionless soil will experience.

Purpose: It helps engineers and construction professionals determine the structural requirements for buried pipes in cohesionless soil conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Load per unit length (N/m)
• \( C_p \) — Pipe coefficient (dimensionless)
• \( \gamma \) — Specific weight of fill material (N/m³)
• \( D \) — External diameter of pipe (m)

Explanation: The formula calculates the vertical load on buried pipes considering soil characteristics and pipe dimensions.

3. Importance of Load Calculation

Details: Proper load estimation ensures pipe structural integrity, prevents deformation, and helps select appropriate pipe materials for underground installations.

4. Using the Calculator

Tips: Enter the pipe coefficient (default 1.2), specific weight of fill (default 1200 N/m³), and external diameter (default 2 m). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical pipe coefficient value?
A: The pipe coefficient typically ranges from 1.0 to 1.5 for cohesionless soils, with 1.2 being a common default value.

Q2: How do I determine specific weight of fill?
A: Specific weight can be measured or estimated based on material type (sand ≈ 1200-1600 N/m³, gravel ≈ 1500-1900 N/m³).

Q3: Why is the diameter squared in the formula?
A: The load increases with the square of diameter because both the width and depth of influence increase proportionally.

Q4: Does this include safety factors?
A: No, additional safety factors should be applied based on project requirements and local codes.

Q5: What's the accuracy of this calculation?
A: Results are typically within ±5% of actual values when input parameters are accurately known.

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