Effective Stress and Equilibrium Equation for Soil Mechanics

ISBN-13: 9780367572457 / Angielski / Miękka / 2020 / 150 str.

Longtan Shao; Xiaoxia Guo; Shiyi Liu

Opis

The concept of effective stress and effective stress equation are fundamental for establishing the theory of soil mechanics and poromechanics. However, up till now, the physical meaning of effective stress has not been explained clearly, and the theoretical basis of effective stress equation has not been proposed. This book is a primary reading

Spis treści

Preface

1 Introduction
1.1 Effective stress
1.2 Equilibrium differential equations
1.3 Continuous medium matter model for soils
1.4 Three constitutive phases of soils
1.5 Soil-water potential and its components
1.6 Soil-water characteristic curves

2 Equilibrium differential equations of soils
2.1 Equilibrium differential equations of soil mass
2.2 Static equilibrium equation of the soil skeleton

3 Effective stress
3.1 Effective stress equation and physical meaning of effective stress
3.2 Relationship between effective stress and shear strength/volumetric strain
3.3 Primary verification of the correlation between effective stress and shear strength of unsaturated soils
3.4 Effective stress principle for unsaturated soils

4 Seepage equation of unsaturated soils
4.1 Seepage equation of saturated soils
4.2 Seepage equation for unsaturated soils
4.3 Formula of seepage force
4.4 The overflow condition of the gas in soils

5 Discussion on some issues related to effective stress
5.1 Does Terzaghi’s effective stress equation need to be modified?
5.2 Is effective stress pseudo or real stress?
5.3 Effective stress and stress state variables of soils
5.4 Effective stress and soil skeleton stress
5.5 The Effective stress of unsaturated soils
5.6 Should contractile skin be the fourth phase?

Units and symbols

References

Index

O autorze

Dr. Longtan Shao is a professor in the Department of Engineering Mechanics, Dalian University of Technology, Dalian, Liaoning, China. He was born in China, where he obtained his bachelor degree, master degree and Ph.D. from Dalian University of Technology. He has been engaged in the research on the theory of soil mechanics, geotechnical testing technology and equipment development, and stability analysis of soil structures.

Dr. Xiaoxia Guo is a Senior Engineer in the Department of Engineering Mechanics, Dalian University of Technology, Dalian, Liaoning, China. She was born in China, and obtained bachelor, master and doctoral degrees from Dalian University of Technology. She has been engaged in the research on soil constitutive model, geotechnical testing technology and equipment, and stability analysis of soil structures.

Dr. Shiyi Liu obtained B.S. degree from Jilin University and Ph.D. degree from Dalian University of Technology. He joined the School of Resources and Civil Engineering at Northeastern University (Shenyang, China) as a Lecturer in 2016. His major research interests are slope stability analysis, lateral earth support structures and underground excavation.

Guofeng Zheng is a Ph.D. student in the Department of Engineering Mechanics, Dalian University of Technology, Dalian, Liaoning, China. His major research interest is the properties of unsaturated soils.