An Experimental Study of Non-coaxial Soil Behaviour Using Hollow Cylinder Testing（砂土非共轴性的空心扭剪实验研究）

　　岩土材料在主应力增量和主应变增量上具有非共轴性，其重要性在岩土工程领域中被广泛重视。本书利用HCA（空心扭剪仪）进行了一系列砂土的非共轴力学试验，并且从砂土非共轴性的表象规律、发生条件和机理、影响因素等方面进行了深入阐释。本书内容包括：文献综述，试验方法介绍，单调加载试验研究，纯剪试验研究，联合加载试验研究。

　　Dr. Yan-yan Cai, the author of this book,was born in Fujian Province of China in1982. She obtained Bachelor degree inCivil Engineering at China Universityof Mining and Technology, P. R. China.Dr Cai obtained her Master and Doctordegrees of Geotechnical Engineeringat University of Nottingham, U.K. in2010. Now, Dr. Cai is working in CivilEngineering Department, HuaqiaoUniveisity, P. R. China as the associateprofessor and master supervisor.
　　Dr. Cai devoted to the researches onmechanism and theory of soils in thepast 10 years. So far, she has publishedmore than 20 academic papers, more ofwhich were published in authoritativeinternational journals such as ‘Journal ofGeotechnical and Geoenvironmental’,’Materials Research Innovations’, etc.Dr. Cai has been responsible or involvedin more than seven projects funded byNational Natural Science Foundation ofP. R China, Ministry of Education of P. R.China. etc.

 

Abstract
Acknowledgements
List of Symbols
Chapter 1 Introduction
1.1 Background
1.2 Research Objectives
1.3 Outline of the Book
Chapter 2 Literature Review
2.1 Introduction
2.2 Non-coaxiality of Soil Behaviour
2.2.1 Definition of Non-coaxiality
2.2.2 Previous Studies on Non-coaxiality
2.2.3 Previous Numerical Studies on Non-coaxiality
2.3 Hollow Cylinder Apparatus
2.3.1 Introduction
2.3.2 Principles of Hollow Cylinder Testing
2.3.3 Stress Distribution in Hollow Cylinder Specimens
2.3.4 Specimen Geometry
2.3.5 Membrane Penetration Errors
2.3.6 Previous Experimental Studies Using HCA
2.4 Previous Studies on Non-coaxiality of Soil Behaviour Using HCA
2.5 Summary
Chapter 3 Experimental Methodology
3.1 Introduction
3.2 NCG Hollow Cylinder Apparatus
3.2.1 Introduction
3.2.2 Equipment Setup
3.2.3 Loading System and Measuring Instrumentation
3.2.4 Control Software
3.3 Tested Materials
3.3.1 Index Properties
3.3.2 Particle Shapes
3.4 Testing Procedures
3.4.1 Specimen Preparation
3.4.2 Saturation and Consolidation
3.4.3 Test Control
3.4.4 Stress Paths
3.5 Equipment Evaluation
3.5.1 Preliminary Experiments
3.5.2 Repeatability of Test Results
3.5.3 Hollow Cylinder Test Versus Triaxial Test
3.5.4 Membrane Penetration Error Correction
3.6 Summary
Chapter 4 Monotonic Loading Tests
4.1 Introduction
4.2 Test Details
4.2.1 Initial Conditions
4.2.2 Stress Paths
4.3 General Soil Behaviour
4.3.1 Series F-D: Dense Sand
4.3.2 Series F- M: Medium Dense Sand
4.3.3 Discussion and Comparison
4.4 Non-coaxial Soil Behaviour
4.4.1 Series F- D: Dense Sand
4.4.2 Series F- D: Medium Dense Sand
4.4.3 Discussion and Comparison
4.5 Summary
Chapter 5 Pure Rotation Tests
5.1 Introduction
5.2 Testing Procedures
5.2.1 Testing Conditions
5.2.2 Stress Paths Followed
5.2.3 Variations of Stresses
5.3 Tests on Portaway Sand
5.3.1 General Soil, Behaviour
5.3.2 Non-coaxial Behaviour
5.4 Tests on Leighton Buzzard Sand
5.4.1 General Soil Behaviour
5.4.2 Non-coaxial Behaviour
5.5 Comparison and Discussion
5.6 Summary
Chapter 6 Combined Loading Tests
6.1 Introduction
6.2 Testing Procedures
6.3 General Soil Behaviour
6.3.1 Stress Variation
6.3.2 Strain Variation
6.3.3 Effect of Density
6.4 Non-coaxial Soil Behaviour
6.5 Comparison and Discussion
6.6 Summary
Chapter 7 Summary and Conclusions
7.1 Summary
7.1.1 Background on Non-coaxiality
7.1.2 Reason to Study the Non-coaxial Soil Behaviour
7.1.3 Experimental Techniques
7.2 Conclusions
7.2.1 Behaviour Under Monotonic Loading
7.2.2 Behaviour Under Pure Rotation of a
7.2.3 Behaviour Under Combined Loading
7.3 Recommendations for Future Research
7.3.1 Update of the Experimental Techniques
7.3.2 Experimental Work
List of Tables
List of Figures
References