This 3-hour course presents a step-by-step solution to a comprehensive range of 1-d consolidation problems for civil engineering students and professionals.
It covers the gap that exists in mainstream curricula that lack sufficient coverage of solved examples due to time limitations.
I have carefully selected the course problems so that they match those that you may come across in your assignments or exams. The course is also applicable to real-life settlement problems in clayey soils.
What's inside
Syllabus
How to process consolidation test results and determine consolidation parameters
After this detailed example, you will be able to:
plot the void ratio versus stress curve both arithmetically and logarithmically;
determine the preconsolidation pressure using Casagrande method;
determine the compression index Cc and recompression index Cr.
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Syllabus
After this detailed example, you will be able to:
plot the void ratio versus stress curve both arithmetically and logarithmically;
determine the preconsolidation pressure using Casagrande method;
determine the compression index Cc and recompression index Cr.
After this detailed example, you will be able to:
determine the stress history of a soil profile in terms of the state of consolidation (NC soil versus OC soil);
determine the margin of consolidation and the over-consolidation ratio OCR.
After this detailed example, you will be able to:
determine the total consolidation settlement due to placement of a fill material;
examine the consolidation of sand compared with clay.
After this detailed example, you will be able to:
determine the total consolidation settlement of 2 different clay layers loaded by a fill material using consolidation test results;
determine whether each clay is either normally consolidated or over-consolidated;
use the proper settlement formulas.
After this detailed example, you will be able to:
plot the e-log p' curve from a set of data of vertical stress versus sample height;
determine the compression index Cc of the given soil.
After this detailed example, you will be able to:
determine the coefficient of consolidation (cv) using time-settlement data;
determine the coefficient of volume compressibility (mv) for a pressure increment using the time settlement data;
determine the coefficient of permeability (k) from the time-settlement data.
After this detailed example, you will be able to:
use data from a soil profile and associated e-log p' curve to determine the consolidation settlement under a loaded footing;
determine the time to 70% consolidation.
After this detailed example, you will be able to:
solve a consolidation problem involving vertical sand drains (or equivalent);
determine the time to 90% consolidation for a clay site treated with vertical sand drains and loaded with a fill surcharge;
solve for the combined vertical and radial drainage to satisfy a specific degree of consolidation.
After this detailed example, you will be able to:
determine the void ratio from laboratory consolidation test results (stress versus sample height)
plot e-log p' curve using the consolidation data;
determine the settlement resulting from a given pressure increment;
determine the secondary consolidation settlement after a certain time.
After this detailed example, you will be able to:
process data involving piezometric measurements due to consolidation;
determine the degree of consolidation from water height in a piezometer by loading;
determine the stress increase at a point using piezometer data at another point;
differentiate between the average degree of consolidation and the degree of consolidation at a point;
apply the general consolidation equation involving Fourier series.
After this detailed example, you will be able to:
determine the settlement of a clay deposit due to dewatering (water level drop) for a given soil profile;
determine the swelling of the clay due to the rising of the water level to its original level.
After this detailed example, you will be able to:
determine the primary consolidation settlement under a structure for a given soil profile consisting of clay;
determine the settlement 9 months after the application;
determine the effective stress at a point in the middle of the soil;
determine the time needed for the water height in a piezometer installed in the middle of the clay to reach a certain elevation.
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Reviews summary
Practical solved examples for consolidation
Solutions are detailed and easy to follow.
Provides practical, step-by-step solved examples.
Activities
Review Basic Soil Mechanics Principles
Show steps
Reinforce your understanding of fundamental soil mechanics concepts, which are essential for grasping consolidation principles.
Browse courses on
Soil Mechanics
Show steps
-
Review definitions of effective stress, total stress, and pore water pressure.
-
Practice calculating effective stress in different soil profiles.
-
Review soil classification systems like USCS and AASHTO.
Holtz and Kovacs: An Introduction to Geotechnical Engineering
Show steps
Supplement your learning with a comprehensive textbook on geotechnical engineering, providing a solid foundation in soil mechanics and consolidation.
View
An Introduction to Geotechnical Engineer
on Amazon
Show steps
-
Read the chapters related to consolidation theory and soil properties.
-
Work through the example problems in the book.
-
Compare the book's approach to consolidation with the course materials.
Calculate Preconsolidation Pressure
Show steps
Sharpen your skills in determining preconsolidation pressure using different methods, a crucial step in consolidation analysis.
Show steps
-
Find practice problems involving e-log p' curves.
-
Apply Casagrande's method to determine preconsolidation pressure.
-
Compare results from different methods and analyze discrepancies.
Three other activities
Expand to see all activities and additional details
Show all six activities
Soil Mechanics: Concepts and Applications, 3rd Edition
Show steps
Expand your understanding of soil mechanics with a book that balances theory and practical applications, providing a broader perspective on consolidation.
View
Soil Mechanics
on Amazon
Show steps
-
Read the sections on consolidation and time-dependent settlement.
-
Review the case studies and examples provided in the book.
-
Compare the book's approach to consolidation with the course materials.
Create a Consolidation Case Study Summary
Show steps
Deepen your understanding by summarizing a real-world consolidation case study, highlighting key parameters and settlement predictions.
Show steps
-
Research a published case study on soil consolidation.
-
Summarize the soil profile, loading conditions, and consolidation parameters.
-
Compare predicted and actual settlements, discussing potential reasons for differences.
Develop a Consolidation Settlement Calculator
Show steps
Solidify your knowledge by creating a tool that automates consolidation settlement calculations, allowing you to quickly analyze different scenarios.
Show steps
-
Choose a programming language or spreadsheet software.
-
Implement the consolidation settlement equations from the course.
-
Test the calculator with various soil profiles and loading conditions.
-
Add features to handle different consolidation scenarios (e.g., normally consolidated vs. overconsolidated).
Review Basic Soil Mechanics Principles
Show steps
Reinforce your understanding of fundamental soil mechanics concepts, which are essential for grasping consolidation principles.
Browse courses on
Soil Mechanics
Show steps
- Review definitions of effective stress, total stress, and pore water pressure.
- Practice calculating effective stress in different soil profiles.
- Review soil classification systems like USCS and AASHTO.
Holtz and Kovacs: An Introduction to Geotechnical Engineering
Show steps
Supplement your learning with a comprehensive textbook on geotechnical engineering, providing a solid foundation in soil mechanics and consolidation.
View
An Introduction to Geotechnical Engineer
on Amazon
Show steps
- Read the chapters related to consolidation theory and soil properties.
- Work through the example problems in the book.
- Compare the book's approach to consolidation with the course materials.
Calculate Preconsolidation Pressure
Show steps
Sharpen your skills in determining preconsolidation pressure using different methods, a crucial step in consolidation analysis.
Show steps
- Find practice problems involving e-log p' curves.
- Apply Casagrande's method to determine preconsolidation pressure.
- Compare results from different methods and analyze discrepancies.
Soil Mechanics: Concepts and Applications, 3rd Edition
Show steps
Expand your understanding of soil mechanics with a book that balances theory and practical applications, providing a broader perspective on consolidation.
View
Soil Mechanics
on Amazon
Show steps
- Read the sections on consolidation and time-dependent settlement.
- Review the case studies and examples provided in the book.
- Compare the book's approach to consolidation with the course materials.
Create a Consolidation Case Study Summary
Show steps
Deepen your understanding by summarizing a real-world consolidation case study, highlighting key parameters and settlement predictions.
Show steps
- Research a published case study on soil consolidation.
- Summarize the soil profile, loading conditions, and consolidation parameters.
- Compare predicted and actual settlements, discussing potential reasons for differences.
Develop a Consolidation Settlement Calculator
Show steps
Solidify your knowledge by creating a tool that automates consolidation settlement calculations, allowing you to quickly analyze different scenarios.
Show steps
- Choose a programming language or spreadsheet software.
- Implement the consolidation settlement equations from the course.
- Test the calculator with various soil profiles and loading conditions.
- Add features to handle different consolidation scenarios (e.g., normally consolidated vs. overconsolidated).
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