Foundation Engineering Analysis and Design

An-Bin Huang, Hai-Sui Yu

• Publisher: CRC Press
• Year: 2017
• eBook ISBN: 9781351255387
• Topic: Technology & Engineering
• Subtopic: Civil Engineering
• Index: Technology & Engineering

One of the core roles of a practising geotechnical engineer is to analyse and design foundations. This textbook for advanced undergraduates and graduate students covers the analysis, design and construction of shallow and deep foundations and retaining structures as well as the stability analysis and mitigation of slopes. It progressively introduces critical state soil mechanics and plasticity theories such as plastic limit analysis and cavity expansion theories before leading into the theories of foundation, lateral earth pressure and slope stability analysis. On the engineering side, the book introduces construction and testing methods used in current practice. Throughout it emphasizes the connection between theory and practice. It prepares readers for the more sophisticated non-linear elastic-plastic analysis in foundation engineering which is commonly used in engineering practice, and serves too as a reference book for practising engineers.

A companion website provides a series of Excel spreadsheet programs to cover all examples included in the book, and PowerPoint lecture slides and a solutions manual for lecturers. Using Excel, the relationships between the input parameters and the design and analysis results can be seen. Numerical values of complex equations can be calculated quickly. non-linearity and optimization can be brought in more easily to employ functioned numerical methods. And sophisticated methods can be seen in practice, such as p-y curve for laterally loaded piles and flexible retaining structures, and methods of slices for slope stability analysis.

Chapter 1

Soil behavior and critical state soil mechanics

1.1Introduction

The main purpose of a foundation is to ensure that the load from the superstructure is properly transmitted to the ground. Retaining walls are built to hold the soil behind it. Civil engineering projects often involve construction through an uneven terrain, or creation of uneven ground due to excavation where the stability of the natural or man-made slope is of concern. The above subjects, as diverse as they may appear, have one thing in common—they all involve unbalanced loading conditions. The analysis or design is to assure that the ground mass remains stable under the given or expected loading conditions and the built structure performs as required. Traditionally, the analysis has been divided into two broad categories, as follows.

1.1.1Safety analysis

The safety analysis can also be considered as a limit state analysis. The goal of this analysis is to determine the ratio between the ultimate resistance (capacity) over the given or expected load (demand) that the ground mass or the ground-supporting structure can offer. This ratio is referred to as the factor of safety (FS). Obviously, to maintain stability, an FS larger than 1 is required. This part of the analysis is traditionally done using the limit equilibrium method. In this method, the soil or ground mass around the foundation is divided by a series of slip surfaces into a number of sectors or blocks. The soil is assumed to be rigid outside of the slip surfaces. Ground displacement is allowed only along the slip surfaces as an assembly of rigid blocks. Despite of the fact that the key parameters are in terms of stresses, the analysis is based on the equilibrium of forces acting on the slip surfaces. S...

Table of contents

• Cover
• Half Title
• Title Page
• Copyright Page
• Dedication
• Contents
• List of figures
• List of tables
• Preface
• About the Authors
• 1. Soil behavior and critical state soil mechanics
• 2. Limit analysis and cavity expansion methods
• 3. Subsurface exploration for foundation design
• 4. Shallow foundations: Bearing capacity and settlement
• 5. Lateral earth pressure and retaining structures
• 6. Braced excavations
• 7. Static analysis and design of deep foundations
• 8. Construction and testing of deep foundations
• 9. Slope stability analysis
• Index