000			03501cam a2200337Ii 4500
001			9780203815779
008			180420s2011 enkad ob 001 0 eng d
020			_a9780203815779 _q(e-book : PDF)
020			_a9781136717390 _q(e-book: Mobi)
020			_a9781136717437 _q(e-book: ePub)
020			_a9781136717444 _q(e-book: PDF)
020			_z9780415669573 _q(hardback)
020			_z9781138072893 _q(paperback)
024	7		_a10.1201/b10861 _2doi
035			_a(OCoLC)741139707
050		4	_aTF250 _b.I53 2011
082	0	4	_a625.141 _bI419
100	1		_aIndraratna, Buddhima, _eauthor. _915890
245	1	0	_aAdvanced rail geotechnology : _bballasted track / _cBuddhima Indraratna, Wadud Salim, Cholachat Rujikiatkamjorn.
264		1	_aLondon ; _aBoca Raton : _bCRC Press, _c2011.
300			_a1 online resource (xviii, 414 pages)
500			_aA Balkema book.
505	0		_a1. Introduction -- 2. Track structure and rail load -- 3. Factors governing ballast behaviour -- 4. State-of-the-art laboratory testing and degradation assessment of ballast -- 5. Behaviour of ballast with and without geosynthetics and energy absorbing mats -- 6. Existing track deformation models -- 7. A constitutive model for ballast -- 8. Track drainage and use of geotextiles -- 9. Role of subballast, its drainage and filtration characteristics -- 10. Field instrumentation for track performance verification -- 11. DEM modelling of ballast densification and breakage -- 12. FEM modelling of tracks and applications to case studies -- 13. Non-destructive testing and track condition assessment -- 14. Track maintenance -- 15. Recommended ballast gradations -- 16. Bio-engineering for track stabilisation.
520			_aBallast 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 particle breakage. 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-- _cProvided by publisher.
650		0	_aBallast (Railroads) _915891
700	1		_aSalim, Wadud. _915892
700	1		_aRujikiatkamjorn, Cholachat. _915893
776	0	8	_iPrint version: _z9780415669573
856	4	0	_uhttps://www.taylorfrancis.com/books/9781136717444 _zClick here to view.
942			_cEBK
999			_c71130 _d71130