Effective Stress and Equilibrium Equation for Soil Mechanics

ISBN-13: 9781138092310 / Angielski / Twarda / 2017 / 150 str.

Longtan Shao

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. Researchers have not yet reached a common sense on the feasibility of the concept of effective stress and effective stress equation for unsaturated soils. Considering the effect of pore fluid pressure and the external forces excluding pore fluid pressure on the soil skeleton separately and defining the effective stress as the skeleton stress due to external forces, the effective stress equation can be derived and an explicit physical meaning of effective stress can be given. Based on the definition of skeleton, we consider the part of pore water which is bonded tightly with soil particles, bearing and transferring load together with the particles as a component of soil skeleton. Then, taking skeleton and pore fluid as research object respectively and considering the effects of the pore fluid pressure and the other external forces separately, the equilibrium differential equation of soil mechanics can be provided. Meanwhile, the effective stress equation and seepage equation can be derived. Finally, some possibly controversial problems are discussed to help the readers better understand the role of equilibrium equation and master the concept of effective stress. This book is a primary reading for the theory of soil mechanics in a new viewpoint. The audience of this book is senior undergraduates, graduate students, academics, and researchers major in soil mechanics, poromechanics, civil engineering, hydraulic engineering, traffic engineering, mining engineering and petroleum engineering.

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.