Author :Muni Budhu
PURPOSES OF THIS BOOK
Soil Mechanics and Foundations by muni budhu is intended to present the principles of soil mechanics and its application to foundation analyses. It will provide you with an understanding of the properties and behavior of soils, albeit not a perfect
understanding. The design of safe and economical geotechnical structures or systems requires considerable experience and judgment, which cannot be obtained by reading this or any other textbook. It is
hoped that the fundamental principles and guidance provided in this textbook will be a base for lifelong
learning in the science and art of geotechnical engineering.
The goals of this textbook in a course on soil mechanics and foundation are as follows:
1. To understand the physical and mechanical properties of soils.
2. To determine parameters from soil testing to characterize soil properties, soil strength, and soil
3. To apply the principles of soil mechanics to analyze and design simple geotechnical systems.
OUTCOMES AFTER READING THIS BOOK
When you complete studying this textbook you should be able to:
• Describe soils and determine their physical characteristics such as grain size, water content, and
• Classify soils.
• Determine compaction of soils.
• Understand the importance of soil investigations and be able to plan a soil investigation.
• Understand the concept of effective stress.
• Determine total and effective stresses and porewater pressures.
• Determine soil permeability.
• Determine how surface stresses are distributed within a soil mass.
• Specify, conduct, and interpret soil tests to characterize soils.
• Understand the stress–strain behavior of soils.
• Understand popular failure criteria for soils and their limitations.
• Determine soil strength and deformation parameters from soil tests, for example, Young’s modulus,
friction angle, and undrained shear strength.
• Discriminate between “drained” and “undrained” conditions.
• Understand the effects of seepage on the stability of structures.
• Estimate the bearing capacity and settlement of structures founded on soils.
• Analyze and design simple foundations.
• Determine the stability of earth structures, for example, retaining walls and slopes.
Table of Contents
Introduction to soil mechanics
Geological characteristics and
particle sizes of soils
- Soils investigation
Physical soil states and soil
- Soil compaction
One-dimensional flow of water
Stresses, strains, and elastic
deformations of soils
- Stress path
settlement of fine-grained soils
- Shear strength of soils
A critical state model to
interpret soil behavior
Bearing capacity of soils and
settlement of shallow foundations
- Pile foundations
Two-dimensional flow of water
Stability of earth-retaining
- Slope stability
Distribution of vertical stress
and elastic displacement under a uniform