Design of Buried Pipelines

By the end of this course, you will be able to:

• Determine and evaluate loads acting on buried pipelines under real operating conditions
• Design buried gravity flow and pressure pipelines using established engineering methods
• Assess pipe–soil interaction to support safe and reliable infrastructure performance
• Identify failure risks and apply design strategies to improve long-term durability
• Apply practical design considerations for installation, materials selection, and environmental loading

Description

Buried pipeline systems are critical to infrastructure performance, yet their behaviour is influenced by complex interactions between soil conditions, loading scenarios, material properties, and installation practices. Misjudgments in design or installation can lead to structural failures, service disruptions, and costly remediation.

This course focuses on the practical challenges involved in designing buried gravity and pressure pipelines under real-world conditions. It addresses how loads develop and transfer, how pipe–soil interaction affects performance, and how different materials respond to combined loading, environmental factors, and installation constraints.

Through applied examples and structured engineering approaches, this course provides the tools needed to design buried pipeline systems with confidence. The result is improved reliability, reduced risk of failure, and more effective decision-making in pipeline design and installation.

Who Should Attend

This course is designed for:

• Civil, geotechnical, and pipeline engineers
• Engineering technologists and technical specialists involved in infrastructure design
• Contractors and professionals responsible for pipeline installation and construction
• Professionals involved in municipal infrastructure, utilities, and asset management
• Early-career to experienced practitioners seeking to strengthen applied pipeline design skills

Day I

Introduction

• Application of buried pipes
• Common pipe materials and characteristics

Loads on Buried Pipelines

• Loads on buried rigid pipes
• Loads on tunnelled or jacked pipes
• Loads on flexible pipes
• Effect of pipe axial bending
• Live wheel loads
• Highways and railway loads
• Airport loads
• Minimum soil cover
• Pipe flotation
• Longitudinal fractures
• Broken bells
• Effect of soil subsidence
• Effect of temperature rise
• Effect of seismic loads
• Frost loads
• Soil bearing

Design of Buried Gravity Flow Pipes

• Soil Type and Classifications
• Pipe Installation and Embedment
• Trench Width considerations
• Effect of Heavy Equipment
• Design of rigid pipes
• Design of flexible pipes
• Creep and stress relaxation behaviour
• Watkins’s Soil-Strain Theory
• Design criteria
• Factor of safety
• Profile-wall pipe
• Parallel pipes
• Parallel pipe and trench
• Sloped Trench Wall
• Pipe-soil interaction
• Finite element analysis of buried pipes

Day II

Design of Pressure Pipelines

• The difference with gravity flow pipes
• Lame’s solution for internal pressure
• Surge pressure
• External loads
• Combined loading
• Poisson’s effect
• Thermal load
• Stress riser
• Design bases for rigid pipes
• Design bases for flexible pipes
• Design bases for ductile iron pipes
• Design bases for steel pipes
• Design bases for fibre-reinforced plastic pipes
• Pipe thrust and thrust restraint

Pipe Installation Techniques

• Soil types
• Trenching
• Thrust block
• Trench size
• Backfilling
• Parallel trenches
• Trenchless Technology
• Microtunneling

Questions and Answers and Feedback to Participants on Achievement of Learning Outcomes