Principles of Soil Mechanics Laboratory Testing

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

• Interpret laboratory soil test results to classify soils and support geotechnical design decisions
• Evaluate soil type, characteristics, compaction, hydraulic conductivity, compressibility, and shear strength parameters for engineering applications
• Select appropriate laboratory test methods and interpret results for short‑ and long‑term ground behavior
• Confidently communicate soil test findings and limitations to support engineering judgment

Description

In geotechnical practice, design decisions often rely on laboratory soil test data, yet those results are only valuable when they are correctly interpreted and applied within real project constraints. Professionals are frequently required to assess ground behaviour related to compaction, seepage, settlement, and shear strength, often with incomplete data and varying soil conditions.

This course provides a structured, practice‑focused foundation in soil characterization and laboratory testing, emphasizing how commonly measured soil properties influence engineering performance. In addition to focusing on laboratory testing procedures, the course provides a comprehensive review on the interpretation of soil mechanics laboratory testing results, and connects test results to engineering behaviour and design assumptions.

Who Should Attend

This course is designed for:

• Civil and geotechnical engineers
• Engineering technologists and technicians involved in laboratory or field testing
• Early‑career professionals building foundational geotechnical competency
• Practicing engineers seeking a refresher on soil testing interpretation
• Professionals responsible for reviewing, interpreting, or applying geotechnical investigation data

Day I

Introduction

• Basic soil characteristics and soil classification

Measurement of Soil Index Properties

• Soil gradation by sieving and hydrometer tests
• Soil plasticity and Atterberg limit tests
• Examples of soil classification

Soil Compaction

• Introduction to soil compaction
• Standard Proctor compaction test
• Modified Proctor compaction test
• Field compaction control
• Examples of ground compaction design

Hydraulic Conductivity (K) of Soils

• Fundamental of seepage and Bernoulli’s equation
• Darcy’s law for water flow through the soil
• Constant-head K test
• Falling-head K test
• Examples of hydraulic conductivity measurement
• Examples of seepage analysis based on K measurements

Day II

Soil Compressibility and Consolidation Parameters

• Primary consolidation and soil compression indices
• Incremental loading oedometer test
• Constant rate of strain oedometer test
• End of primary consolidation
• The time rate of consolidation and coefficient of consolidation
• Secondary compression and long-term settlement of soil
• Examples of consolidation tests and determining soil consolidation parameters

Shear Strength Properties

• Introduction to soil failure
• Soil strength for short- and long-term conditions
• Direct shear test
• Unconfined compression test
• Triaxial compression test
• Determination of Mohr-Coulomb strength parameters
• Analysis of drained and undrained strengths
• Examples: soil shearing tests and analysis

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