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Advanced Rail Geotechnology - Ballasted Track [Kõva köide]

(University of Technology Sydney, Australia), (University of Wollongong, Australia),
  • Formaat: Hardback, 432 pages, kõrgus x laius: 246x174 mm, kaal: 980 g
  • Ilmumisaeg: 16-Mar-2011
  • Kirjastus: CRC Press
  • ISBN-10: 041566957X
  • ISBN-13: 9780415669573
Teised raamatud teemal:
Advanced Rail Geotechnology - Ballasted TrackSuurem pilt
  • Formaat: Hardback, 432 pages, kõrgus x laius: 246x174 mm, kaal: 980 g
  • Ilmumisaeg: 16-Mar-2011
  • Kirjastus: CRC Press
  • ISBN-10: 041566957X
  • ISBN-13: 9780415669573
Teised raamatud teemal:
Püsilink: https://www.kriso.ee/db/9780415669573.html
Märksõnad:
"Ballast plays a vital role in transmitting and distributing the train wheel loads to the underlying sub-ballast and subgrade. Bearing capacity of track, train speed, riding quality and passenger comfort all depend on the stability of ballast through mechanical interlocking of particles. Ballast attrition and breakage occur progressively under heavy cyclic loading, causing track deterioration and rail misalignment affecting safety, and also demanding frequent and costly track maintenance. In the absence of realistic constitutive models, the track substructure is traditionally designed using empirical approaches. In this book, the authors present the detailed information on the strength, deformation, and degradation aspects of fresh and recycled ballast under monotonic, cyclic, and impact loading using innovative geotechnical testing devices. A new stress-strain constitutive model for ballast incorporating particle breakage is presented. The mathematical formulations and numerical models are validated using experimental evidence and field trials. The effectiveness of various commercially available geosynthetics for enhancing track drainage and stability is elucidated. Revised ballast gradations are presented for modern high speed trains capturing particlebreakage. This book should prove useful for final year civil engineering students and postgraduates, and for practicing railway engineers with the task of modernizing existing designs for heavier and faster trains"--Provided by publisher.

"In this book, the authors present the detailed information on the strength, deformation and degradation aspects of fresh and recycled ballast under monotonic, cyclic, and impact loading using innovative geotechnical testing devices"--Provided by publisher.
Preface xi
Foreword xv
About the Authors xvii
1 Introduction
1(14)
1.1 Nature of Track Substructure
2(9)
1.2 Carbon Footprint and Implications
11(1)
1.3 Scope
12(3)
2 Track Structure and Rail Load
15(32)
2.1 Types of Track Structure
15(2)
2.2 Components of a Ballasted Track
17(8)
2.3 Track Forces
25(10)
2.4 Load Transfer Mechanism
35(2)
2.5 Stress Determination
37(10)
3 Factors Governing Ballast Behaviour
47(34)
3.1 Particle Characteristics
47(6)
3.2 Aggregate Characteristics
53(4)
3.3 Loading Characteristics
57(10)
3.4 Particle Degradation
67(14)
4 State-of-the-art Laboratory Testing and Degradation Assessment of Ballast
81(26)
4.1 Monotonic Triaxial Testing
81(6)
4.2 Single Grain Crushing Tests
87(1)
4.3 Cyclic Triaxial Testing
88(9)
4.4 Impact Testing
97(10)
5 Behaviour of Ballast with and without Geosynthetics and Energy Absorbing Mats
107(38)
5.1 Ballast Response under Monotonic Loading
107(17)
5.2 Single Particle Crushing Strength
124(2)
5.3 Ballast Response under Cyclic Loading
126(8)
5.4 Ballast Response under Repeated Loading
134(2)
5.5 Effect of Confining Pressure
136(2)
5.6 Energy Absorbing Materials: Shock Mats
138(7)
6 Existing Track Deformation Models
145(18)
6.1 Plastic Deformation of Ballast
145(2)
6.2 Other Plastic Deformation Models
147(11)
6.3 Modelling of Particle Breakage
158(5)
7 A Constitutive Model for Ballast
163(40)
7.1 Modelling of Particle Breakage
163(7)
7.2 Constitutive Modelling for Monotonic Loading
170(14)
7.3 Constitutive Modelling for Cyclic Loading
184(6)
7.4 Model Verification and Discussion
190(13)
8 Track Drainage and Use of Geotextiles
203(16)
8.1 Drainage
203(3)
8.2 Fouling Indices
206(2)
8.3 Geosynthetics in Rail Track
208(5)
8.4 Use of Geosynthetic Vertical Drains as a Subsurface Drainage
213(6)
9 Role of Subballast, its Drainage and Filtration Characteristics
219(54)
9.1 Subballast Selection Criteria
220(5)
9.2 Empirical Studies on Granular Filtration
225(3)
9.3 Mathematical Formulations in Drainage and Filtration
228(6)
9.4 Constriction Size Distribution Model
234(4)
9.5 Constriction Based Criteria for Assessing Filter Effectiveness
238(2)
9.6 Implications on Design Guidelines
240(2)
9.7 Steady State Seepage Hydraulics of Porous Media
242(2)
9.8 Subballast Filtration Behaviour under Cyclic Conditions
244(14)
9.9 Time Dependent Geo-Hydraulic Filtration Model for Particle Migration under Cyclic Loading
258(15)
10 Field Instrumentation for Track Performance Verification
273(20)
10.1 Site Geology and Track Construction
273(3)
10.2 Field Instrumentation
276(6)
10.3 Data Collection
282(1)
10.4 Results and Discussion
282(11)
11 DEM Modelling of Ballast Densification and Breakage
293(28)
11.1 Discrete Element Method and PFC2D
294(4)
11.2 Modelling of Particle Breakage
298(1)
11.3 Numerical Simulation of Monotonic and Cyclic Behaviour of Ballast using PFC2D
299(8)
11.4 Breakage Behaviour
307(7)
11.5 Mechanism of CF Chains Developed during Cyclic Loading
314(7)
12 FEM Modelling of Tracks and Applications to Case Studies
321(14)
12.1 Use of Geocomposite under Railway Track
321(6)
12.2 Design Process for Short PVDS under Railway Track
327(8)
13 Non-destructive Testing and Track Condition Assessment
335(22)
13.1 Laboratory Model Track
335(3)
13.2 GPR Method
338(10)
13.3 Multi-channel Analysis of Surface Wave Method
348(9)
14 Track Maintenance
357(10)
14.1 Track Maintenance Techniques
357(4)
14.2 Track Geotechnology and Maintenance in Cold Regions
361(6)
15 Recommended Ballast Gradations
367(10)
15.1 Australian Ballast Specifications
368(2)
15.2 International Railway Ballast Grading
370(1)
15.3 Gradation Effects on Settlement and Ballast Breakage
371(2)
15.4 Recommended Ballast Grading
373(1)
15.5 Conclusions
374(3)
16 Bio-Engineering for Track Stabilisation
377(12)
16.1 Introduction
377(1)
16.2 Conceptual Modelling
378(3)
16.3 Verification of the Proposed Root Water Uptake Model
381(8)
Appendices
389(22)
Appendix A Derivation of Partial Derivatives of g(p, q) with respect to p and q from a First Order Linear Differential Equation
391(2)
Appendix B Determination of Model Parameters from Laboratory Experimental Results
393(6)
Appendix C A Pictorial Guide to Track Strengthening, Field Inspection and Instrumentation
399(6)
Appendix D Unique Geotechnical and Rail Testing Equipment
405(6)
Subject Index 411
Professor Buddhima Indraratna is a Civil Engineering graduate from Imperial College London, UK and holds a Masters degree in Soil Mechanics from the same Institution. He obtained his PhD from the University of Alberta, Canada in 1982. After working in industry and academia for several years he joined the University of Wollongong, Australia in 1991, where he is now Professor of Civil (Geotechnical) Engineering, and the Head of School of Civil, Mining and Environmental Engineering.

Professor Indraratna has earned the reputation as one of the worlds leading researchers in rail geotechnology. His work is elucidated in many scholarly journals and invited keynote papers in numerous international conferences since mid-1990s. His contributions through research and development towards the understanding of ballast and subgrade soil behaviour have been incorporated by numerous rail organisations into their engineering practices for the design and maintenance of ballasted tracks. The outcomes through strategic real-life projects and extensive laboratory testing over the past decade have lead to a major revision of current New South Wales standards for the placement densities of ballast on track and its size gradations, leading to significant track enhancement allowing greater axle loads at much higher speeds.

Among numerous national and international awards over the past decade for his research contributions, Professor Indraratna was awarded the prestigious 2009 Business-Higher Education Round Table (BHERT) award by the Australian Government for his outstanding contributions to rail track innovations in collaboration with industry. In September 2014 Professor Indranata was awarded the C. S. Desai Excellence Medal by the International Association of Computer Methods and Advances in Geomechanics (IACMAG).