Rock fall engineering

''INTRODUCTION This book on rock fall engineering has arisen from an initial passing interest in the subject as the result of extensive project work on transportation projects in the mountainous area of North America. This interest developed into a mission to fully understand all aspects of rock fall behavior and the application of this behavior to the design and construction of protection structures. Lately this mission has evolved into an obsession to help develop improved methods of modeling rock falls and the design of more efficient and cost effective protection structures. As with my other two books, Foundations on Rock and Rock Slope Engineering, the intention of this book is to provide both the theory, and the application of the theory to design. In this book, this approach involves describing five case studies where the impacts are well defined, and then showing how trajectory calculations and impact mechanics can be applied to these actual rock fall conditions. It is hoped that the field data will be useful for calibration of computer rock fall simulation programs. In addition, a wide range of well proven rock fall protection measures are discussed. These discussions describe both design methods, and practical construction experience based on many projects in which the author has been involved. It is intended that users of this book will be both researchers working on the development of rock fall simulation, and practitioners working in the field of rock fall mitigation design and construction. My work on rock falls has benefited from my association over many years with practitioners involved with the design and construction of mitigation structures''-- Read more... Content: Rock Falls - Causes And Consequences Source Zones And Topography Geology Weather Effects On Rock Falls Vegetation Effects On Rock Falls Seismic Effects On Rock Falls Human And Animal Influences On Rock Falls Consequences Of Rock Falls Documentation Of Rock Fall Events Impacts On Rock Slopes Impacts On Talus And Colluvium Slopes Impacts On Asphalt Impact With Concrete Summary Of Case Study Results Rock Fall Velocities And Trajectories Trajectory Calculations Rock Fall Velocities Variation Of Trajectories With Restitution Angle Angular Velocity Field Observations Of Rock Fall Trajectories Impact Mechanics Principles Of Rigid Body Impact Forces And Impulses Generated During Collinear Impact Energy Changes During Impact Coefficient Of Restitution Friction And Angular Velocity Changes During Impact Impact Behaviour For Rough, Rotating Body Calculated Vs Actual Restitution Velocities Coefficient Of Restitution Newton's Coefficient Of Restitution Normal Coefficient Of Restitution Tangential Coefficient Of Restitution And Friction Energy Changes During Impacts And Trajectories Impact Mechanics Theory And Kinetic Energy Changes Rotational Energy Gains/Losses Total Energy Losses Energy Loss Diagrams Loss Of Mass During Impact Effect Of Trees On Energy Losses Rock Fall Modelling Spreadsheet Calculations Terrain Model - Two Dimensional V Three Dimensional Analysis Modelling Methods - Lumped Mass Modelling Methods - Discrete Element Model (DEM) Modelling Results Of Case Studies Summary Of Rock Fall Simulation Results Selection Of Protection Structures Impact Energy - Deterministic And Probabilistic Design Values Impact Energy - Service And Ultimate States Energies Impact Energy - Probability Calculations Determination Of Rock Fall Return Periods Risk Management Of Rock Fall Hazards Design Principles Of Rock Fall Protection Structures Structure Location With Respect To Impact Points Attenuation Of Rock Fall Energy In Protection Structures Minimizing Forces In Rock Fall Protection Fences Design Of Stiff, Attenuator Fences Model Testing Of Protection Structures Rock Fall Protection I - Barriers, Nets And Fences Ditches And Barriers MSE Embankments Slide Detector Fences Wire Mesh - Draped and Pinned Nets and fences Rock Fall Protection II - Rock Sheds Types of rock sheds Reinforced concrete sheds Cantilevered structures Sheds with sloping roofs Wire mesh canopies Appendices Abstract: ''INTRODUCTION This book on rock fall engineering has arisen from an initial passing interest in the subject as the result of extensive project work on transportation projects in the mountainous area of North America. This interest developed into a mission to fully understand all aspects of rock fall behavior and the application of this behavior to the design and construction of protection structures. Lately this mission has evolved into an obsession to help develop improved methods of modeling rock falls and the design of more efficient and cost effective protection structures. As with my other two books, Foundations on Rock and Rock Slope Engineering, the intention of this book is to provide both the theory, and the application of the theory to design. In this book, this approach involves describing five case studies where the impacts are well defined, and then showing how trajectory calculations and impact mechanics can be applied to these actual rock fall conditions. It is hoped that the field data will be useful for calibration of computer rock fall simulation programs. In addition, a wide range of well proven rock fall protection measures are discussed. These discussions describe both design methods, and practical construction experience based on many projects in which the author has been involved. It is intended that users of this book will be both researchers working on the development of rock fall simulation, and practitioners working in the field of rock fall mitigation design and construction. My work on rock falls has benefited from my association over many years with practitioners involved with the design and construction of mitigation structures'' "INTRODUCTION This book on rock fall engineering has arisen from an initial passing interest in the subject as the result of extensive project work on transportation projects in the mountainous area of North America. This interest developed into a mission to fully understand all aspects of rock fall behavior and the application of this behavior to the design and construction of protection structures. Lately this mission has evolved into an obsession to help develop improved methods of modeling rock falls and the design of more efficient and cost effective protection structures. As with my other two books, Foundations on Rock and Rock Slope Engineering, the intention of this book is to provide both the theory, and the application of the theory to design. In this book, this approach involves describing five case studies where the impacts are well defined, and then showing how trajectory calculations and impact mechanics can be applied to these actual rock fall conditions. It is hoped that the field data will be useful for calibration of computer rock fall simulation programs. In addition, a wide range of well proven rock fall protection measures are discussed. These discussions describe both design methods, and practical construction experience based on many projects in which the author has been involved. It is intended that users of this book will be both researchers working on the development of rock fall simulation, and practitioners working in the field of rock fall mitigation design and construction. My work on rock falls has benefited from my association over many years with practitioners involved with the design and construction of mitigation structures"-- Provided by publisher Rock falls can be a public safety issue. This book provides comprehensive information on identification of these hazards, and design and construction of protection methods. Rock Fall Engineering describes first, the theoretical background to rock fall behavior in terms of the impact and trajectory phases of rock falls, and second, how this information is applied to modeling of rock falls and the design of ditches, fences and sheds. The theory of rock fall behavior is verified by comparing the calculations with five carefully documented case studies. The book covers four main topics as This book, which contains many worked examples, is of interest to practitioners and researchers working in the fields of geological engineering and natural hazards. Duncan C. Wyllie is a principal with Wyllie & Norrish Rock Engineers in Vancouver, Canada, and a registered professional engineer in British Columbia. He has worked on rock fall hazard projects involving the design and construction protection measures since the 1970s. He is the author of Foundations on Rock, Second Edition , and Rock Slope Engineering, Fourth Edition , both published by CRC Press. Duncan C. Wyllie. Includes Bibliographical References (pages 229-233).