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Advanced Rail Geotechnology Ballasted Track

Author: Buddhima Indraratna
Publisher: CRC Press
ISBN: 0203815777
Size: 12.74 MB
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Ballast plays a vital role in transmitting and distributing 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 demanding frequent and costly track maintenance. In the absence of realistic constitutive models, the track substructure is traditionally designed using empirical approaches. In Advanced Rail Geotechnology: Ballasted Track, the authors present detailed information on the strength, deformation and degradation, and aspects of fresh and recycled ballast under monotonic, cyclic, and impact loading using innovative geotechnical testing devices. The book presents a new stress-strain constitutive model for ballast incorporating particle breakage and validates mathematical formulations and numerical models using experimental evidence and field trials. The text also elucidates the effectiveness of various commercially available geosynthetics for enhancing track drainage and stability. It presents revised ballast gradations for modern high-speed trains capturing particle breakage and describes the use of geosynthetics in track design. It also provides insight into track design, capturing particle degradation, fouling, and drainage. This book is ideal for final year civil engineering students and postgraduates and is a solid reference for practicing railway engineers and researchers with the task of modernizing existing track designs for heavier and faster trains.

Ballast Railroad Design Smart Uow Approach

Author: Buddhima Indraratna
Publisher: CRC Press
ISBN: 0429996314
Size: 26.39 MB
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The railway track network plays an essential role in the transportation infrastructure worldwide. A ballasted railroad is commonly used for several reasons, including economic, rapid drainage and ease of maintenance. Given the increasing demand for trains to carry heavier loads, current Australian ballasted rail networks require a significant amount of upgrading. Railroad ballast is an unbounded granular material that displaces laterally when subjected to repeated train loading. During track operations, ballast deteriorates due to progressive breakage and the infiltration of fine particles or mud-pumping from the underneath layers (e.g., capping, subgrade), which decreases the shear strength, impedes track drainage and increases the deformation of ballasted tracks. This leads to excessive track settlements and instability, and increased maintenance costs. This book presents a comprehensive procedure of ballasted track design based on a rational approach that combines extensive laboratory testing, mathematical and computational modelling and field measurements carried out over the past two decades. The Ballast Railroad Design: SMART-UOW Approach can be regarded as a useful guide to assist the practitioner. This book can also be used as a useful resource by both postgraduate students and as a teaching tool by academics in track design and maintenance.

Analytical Methods In Petroleum Upstream Applications

Author: Cesar Ovalles
Publisher: CRC Press
ISBN: 1138001481
Size: 56.37 MB
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Effective measurement of the composition and properties of petroleum is essential for its exploration, production, and refining; however, new technologies and methodologies are not adequately documented in much of the current literature. Analytical Methods in Petroleum Upstream Applications explores advances in the analytical methods and instrumentation that allow more accurate determination of the components, classes of compounds, properties, and features of petroleum and its fractions. Recognized experts explore a host of topics, including: A petroleum molecular composition continuity model as a context for other analytical measurements A modern modular sampling system for use in the lab or the process area to collect and control samples for subsequent analysis The importance of oil-in-water measurements and monitoring The chemical and physical properties of heavy oils, their fractions, and products from their upgrading Analytical measurements using gas chromatography and nuclear magnetic resonance (NMR) applications Asphaltene and heavy ends analysis Chemometrics and modeling approaches for understanding petroleum composition and properties to improve upstream, midstream, and downstream operations Due to the renaissance of gas and oil production in North America, interest has grown in analytical methods for a wide range of applications. The understanding provided in this text is designed to help chemists, geologists, and chemical and petroleum engineers make more accurate estimates of the crude value to specific refinery configurations, providing insight into optimum development and extraction schemes.

Proceedings Of Geoshanghai 2018 International Conference Transportation Geotechnics And Pavement Engineering

Author: Xianming Shi
Publisher: Springer
ISBN: 9811300119
Size: 45.57 MB
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This book is the fourth volume of the proceedings of the 4th GeoShanghai International Conference that was held on May 27 - 30, 2018. This volume, entitled “Transportation Geotechnics and Pavement Engineering”, represents the recent advances and technologies in transportation geotechnics and pavement engineering. This book covers a wide range of topics, from transportation geotechnics, to geomechanics at various length scales, to pavement materials and structures. The book offers a unique mix of numerical modeling studies, experimental studies, and case studies from industry. It may be of interest to researchers and practitioners in the fields of transportation engineering and pavement engineering. Each of the papers included in this book received at least two positive peer reviews. The editors would like to express their sincerest appreciation to all of the anonymous reviewers all over the world, for their diligent work.

Track Geotechnology And Substructure Management

Author: Ernest Theodore Selig
Publisher: Thomas Telford
ISBN: 9780727720139
Size: 60.42 MB
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This comprehensive study provides practical advice and guidance on the important topics of rail transport and ground engineering, the use of which will result in optimum quality with the minimum maintenance effort and the most economical use of resources. The authors have synthesized all of their international knowledge and experience in this field, and produced, for the first time, a definitive guide for the design, construction, maintenance and renewal of railway track as they relate to geotechnology.

Design And Construction Of Pavements And Rail Tracks

Author: Antonio Gomes Correia
Publisher: CRC Press
ISBN: 0203937546
Size: 24.40 MB
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Design and Construction of Pavements and Rail Tracks - Geotechnical Aspects and Processed Materials is a compilation of selected contributions produced between 2002 and 2005 by the International Committee TC3 - Geotechnics of Pavements of the International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE), a committee dedicated to gathering current knowledge of geotechnical aspects relating to pavements and rail tracks. The volume presents advanced procedures for laboratory and field materials characterization, including processed materials (non-conventional road construction materials), novel tests for field stiffness evaluation, a pre-standard for roller integrated continuous compaction control and new theories for evaluation of the long term performance of materials, including environmental aspects. These contributions represent the latest developments relating to the design, construction and long term performance of pavements, rail tracks and earth structures, with emphasis on the geotechnical and environmental background.


Author: Klaus Knothe
Publisher: Springer-Verlag
ISBN: 364255766X
Size: 30.59 MB
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Mit der Renaissance des Schienenverkehrs hat das Spezialgebiet "Schienenfahrzeugdynamik" an Bedeutung gewonnen. Auf entsprechendes Interesse wird das erste Buch im deutschsprachigen Raum stoßen, das hier seinen Schwerpunkt hat. Obwohl es auf der Vorlesung "Schienenfahrzeugdynamik" an der TU Berlin basiert und Vorkenntnisse bezüglich Mechanik, Schwingungslehre und angewandter Mathematik voraussetzt, spricht es auch den Praktiker an. Das Buch behandelt die Vertikaldynamik bis hin zu Komfortbetrachtungen und die Lateraldynamik so weit, daß dem Leser ein Verständnis der Stabilität von Schienenfahrzeugen möglich ist. Den Vorgängen im Kontakt Rad/Schiene wird besondere Aufmerksamkeit gewidmet. Es enthält die jüngsten Erkenntnisse aus Forschung und Bahnpraxis. Die Autoren gehen detailliert auf die spezielle Terminologie der Schienenfahrzeugdynamik und benachbarter Fachgebiete ein.