Book Cover

Title Dynamic response and deformation characteristic of saturated soft clay under subway vehicle loading / Yiqun Tang, Jie Zhou, Xingwei Ren, Qi Yang
Published Beijing : Science Press ; Heidelberg : Springer, [2014]
Table of Contents
1.1.Research Status3
1.1.1.The Study on Soil Structure3
1.1.2.The Study on Vehicle Vibration Loading3
1.1.3.Dynamic Response of Vehicle Vibration Load6
1.1.4.Dynamic Properties of Soft Clay Soil Under Dynamic Loading10
1.1.5.Microstructure of Soft Clay Soil13
1.1.6.The Long-Term Settlement of Soft Clay Foundation Under Vehicle Vibration Loading16
1.2.Research Content and Methodology18
1.2.1.Dynamic Response of Soft Clay Surrounding Subway Tunnel to Subway Traffic Loads19
1.2.2.Dynamic Characteristics of Soft Clay Under Subway Vibration Loads19
1.2.3.Microstructure Study of Soft Clay Under Subway Vibration Loads19
1.2.4.Numerical Simulation20
1.2.5.Settlement Prediction of Soil Surrounding Subway Tunnel Under Subway Vibration Loads20
2.2.Engineering Geology of Soft Soil in Shanghai26
2.3.Program Design28
2.3.1.Selection of Testing Site28
2.3.2.Selection of Testing Instruments28
2.3.3.Stratigraphic Section and Instrument Installation29
2.4.Results and Analysis29
2.4.1.Soil Response Frequency30
2.4.2.The Attenuation of Dynamic Response in Perpendicular Direction to Subway Tunnel Axis32
2.4.3.The Dynamic Response Development Along the Depth34
2.4.4.Development of Pore Pressure35
2.4.5.Mechanism Analysis of Pore Pressure Development Under Subway Traffic Loading36
2.5.Chapter Summary38
3.Laboratory Tests41
3.2.Pore Pressure Development42
3.2.1.Experimental Summary43
3.2.2.The Pore Water in Soft Clay49
3.2.3.The Pore Water Development Properties53
3.2.4.The Pore Water Pressure Attenuation Properties58
3.2.5.The Mechanism Analysis of Influence of Subway Vibration Loads on Pore Water Pressure59
3.3.Deformation Characteristics of Saturated Soft Soils60
3.3.1.Experimental Introduction61
3.3.2.The Factors on Deformation Under Cyclic Loads65
3.4.Strength Characteristics of Saturated Soft Soils71
3.5.Creep Behavior of Soil Under Cyclic Loading (Tang et al. 2010)72
3.5.1.Test Apparatus and Samples74
3.5.2.Test Control Parameter and Procedures74
3.5.3.Test Procedures75
3.5.4.Composition of Clayey Creep Under Cyclic Loading76
3.5.5.The Change of Reversible Elastic Strain of Saturated Clay81
3.5.6.Variation of Accumulated Plastic Strain of Saturated Clay83
3.5.7.Variation of the Residual Pore Water Pressure85
3.6.Dynamic Stress-Strain Relationships87
3.7.Effective Principal Stress Variation90
3.7.1.Experimental Introduction90
3.7.2.The Variation of Effective Primary Stress with Loading Time92
3.7.3.The Variation of Shear Wave Velocity95
3.8.Mechanism Analysis95
3.9.Chapter Summary97
4.Research of Microstructure101
4.2.Qualitative Analysis104
4.2.1.Research Method106
4.2.2.Preparation of Samples107
4.2.3.Basic Characteristics of the Soil Samples108
4.2.4.Qualitative Analysis of Observed Result109
4.3.Quantitative Analysis126
4.3.1.Research Method127
4.3.2.Fractal Parameters of MIP Results131
4.3.3.The Characteristics of Pore Variation in Undisturbed Soft Clay During the Process of Mercury Intrusion132
4.3.4.The Characteristics of Pore Variation in Undisturbed Soft Clay During the Process of Mercury Extrusion135
4.3.5.The Variation of Pore Structure Characteristic Parameters in Saturated Soft Clay Under Vibration Loading136
4.3.6.Fractal Model and Fractal Dimension140
4.4.Correlation Analysis Between Microstructure and Macroscopic Deformation Properties of Saturated Soft Clay Under Subway Loading147
4.4.1.Correlation Analysis of Pore Microstructure Parameter and Macroscopic Force147
4.4.2.Correlation Analysis of Pore Microstructure Parameters and Macroscopic Deformation149
4.5.Chapter Summary151
5.Finite Element Modeling155
5.2.Finite Element Analysis Software156
5.2.1.Numerical Method156
5.2.2.The Finite Element Method and ANSYS156
5.3.Theoretical Analysis157
5.3.1.General Equations of the Dynamic Analysis158
5.3.2.Dynamic Finite Element Analysis161
5.3.3.Static-Dynamic Analysis of Subway-Soil System166
5.4.Simulation of the Dynamic Loading Induced by the Subway Train169
5.4.1.Generation Mechanism170
5.4.2.Simplified Model for Subway Train173
5.4.3.The Simulation of Subway Train Loading173
5.5.Model Development177
5.5.1.Introduction to the Model177
5.5.2.Mesh Generation in FEM Model179
5.5.3.Material Parameters184
5.6.Viscoelastic Artificial Boundary184
5.7.The Time Integral Step186
5.8.The Results of Transient Analysis186
5.9.Chapter Summary189
6.Settlement Prediction of Soils Surrounding Subway Tunnel191
6.2.Analysis on Subway Tunnel Settlement During Tunneling in Soft Soil192
6.2.2.Scope of Settlement and Settlement Tank194
6.2.3.Relationship Between Settlement and Grouting Quantity195
6.2.4.Estimation of the Ground Pre-settlement198
6.2.5.Summary of Early Settlement's Analysis200
6.3.Analysis of Long-Term Settlement of Subway Tunnel in Soft Soil200
6.3.1.Factors Affecting Long-Term Settlement of Subway Tunnel in Soft Soil200
6.3.2.Mechanism Analysis of Long-Term Additional Settlement in Foundation Caused by Subway Load202
6.4.Applications of Gray Prediction Theory in Predicting Long-Term Settlement of Subway Tunnel203
6.4.1.Research Backgrounds and Introduction203
6.4.2.Methodology of Gray Prediction Theory206
6.4.3.Model Checking209
6.4.4.Applications of Prediction Model210
6.4.5.Discussions and Error Analyses213
6.5.Effective Stress Analysis of Long-Term Settlement in Tunnel219
6.6.Chapter Summary221
7.Conclusions and Prospects225
7.2.Prospects for Further Study228
 Appendix: Major Published Works of the Book Author229


Description 1 online resource (xxii, 241 pages) : illustrations (some color)
Series Springer environmental science and engineering, 2194-3222
Springer environmental science and engineering.
Contents Introduction -- Field test -- Laboratory tests -- Microstructure of soil -- Theoretical analysis and numerical simulation -- Settlement predictions for soil around subway tunnels
Summary "Involving several areas of geological engineering, geotechnical engineering and tunnel engineering, this book describes the soft soil deformation characteristics and dynamic responses induced by subway vibration load. Based on field monitoring and laboratory testing data, with both comprehensive micro-and macroanalysis, the authors present dynamic characteristics and deformation settlement of saturated soft clay surrounding subway tunnels using dynamic and static methodology. Mechanism of deformation, failure in microstructure of soft clay soil, dynamic response, macro deformation and settlement are all discussed and analyzed thoroughly and systematically. Some of the research findings in this book have been widely applied by large subway companies and will have broader application prospects in future. All the above make this book a valuable reference not only for technical engineers working in subway design or construction but also for advanced graduate students"--Provided by publisher
Bibliography Includes bibliographical references and index
Notes Online resource; title from pdf information screen (Ebsco, viewed March 12, 2014)
Subject Soil dynamics.
Deformations (Mechanics)
Clay soils.
Subway tunnels.
Underground construction.
underground buildings.
underground structures.
Sciences de la terre.
Clay soils.
Deformations (Mechanics)
Soil dynamics.
Subway tunnels.
Underground construction.
Genre/Form Electronic books
Form Electronic book
Author Tang, Yiqun, author
Zhou, Jie, author
Ren, Xingwei, author
Yang, Qi, author
LC no. 2013957571
ISBN 9783642419874