Download or read book Assessment of Rockfall Rollout Risk Along Varying Slope Geometries Using the Rocfall and CRSP Software written by Mariam S. Al E'bayat and published by . This book was released on 2017 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Most routes in mountainous areas suffer from rock falling, rolling and bouncing risk. There are many computer programs concerned with simulating the rockfall problem, and whereas they have the same purpose, they however differ in the input data that's needed to simulate the problem, and they also differ in the way of processing and kind of output. This study used Rocfall® and the Colorado Rockfall Simulation Program (CRSP®) to simulate sixty-three models of varying slope geometry, where only the slope geometry is changed with the same material properties for both the slope and the rocks. Both programs were fast and easy in the data input stage, whereas the 'Barrier' feature of Rocfall added an advantage over the CRSP program in enhancing the solving of the rockfall problem. Also, 'Data Collectors', 'Results Animation' and 'Graph Distribution' on the slope profile help display the analysis results in Rocfall. Generally, the Rocfall and CRSP program results are not similar. The rock falls at a different angle in each program; CRSP is closest to the Physics theory, so that affects the results. Also, the rocks can be located just at (X=0) in CRSP that affects the allowed number of rocks falling along slope profile. Despite of the differences between the Rocfall and CRSP programs, their results indicated the slopes with 900 slope angle is the ideal slope geometry for rockfall problem. For vertical slopes, no rocks passed the shoulder edge onto highway in both programs. CRSP results indicated that the percentage of rocks that reach the highway are increasing when the slope height increases"--Abstract, page iii.
Download or read book Analysis of Rockfall Trajectories and Evaluation of Concrete Barrier Efficiency written by Srikanth Marchetty and published by . This book was released on 2015 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rockfall is the movement of rocks down the slope which can be in the form of freefall, bouncing, rolling, and sliding. The movement of rocks on different inclined slopes attains different amount of energies impacting the barrier with impact energy more than the absorbing capacity of a barrier leading to a hazard for highway users. The solution that is adopted by Ohio department of transportation (ODOT) to prevent this hazard is the placement of 32 inch precast concrete barrier (PCB) or to construct a 42 inch cast in place concrete barriers (CIP) along the edge of the roadway. The objective of this research is to perform a full-scale field testing and to investigate the trajectories of the falling rocks to compute velocities and bounce heights at impact and comparing them with the computer simulation programs called CRSP", and "Rocfall" RocScience Inc.,(Canada).Test Rocks made of reinforced cement concrete were rolled on three different slopes, allowing the Test Rocks to impact the concrete barrier built at the bottom of the slope. The three slopes were made with an inclination of 29 degrees, 45 degrees, 56 degrees. High speed cameras were used to capture the motion of Test Rocks and the videos thus recorded were converted to images to analyze the Test Rocks motion in a software called "PONTOS". The velocities and bounce heights of the rolling Test Rocks were found by "Pixel Point Method" using PONTOS software. Analysis of almost 68 rollouts was performed to compute the velocities and bounce heights of the falling Test Rocks and plotted to compare the results with that extracted from the computer simulation programs CRSP, and ROCFALL. The velocities and bounce heights of Test Rocks vary significantly based on a given rock, soil characteristics, initial velocity and many other factors. Velocities, bounce heights from CRSP, and RocFall are compared with those obtained from the PONTOS (Field Tests) and found to be inconsistent for a given rock size as there are a number of factors that change the behavior of Test Rocks during its roll. CRSP and RocFall programs underestimated both bounce heights and velocities at the impact location with the simulations performed considering the coefficients from their respective manuals. Statistical analysis was performed to the results obtained from field tests and computer simulations to develop factors that need to be multiplied to get the design values.
Download or read book A Geotechinical Investigation of the 2013 Fatal Rockfall in Rockville Utah written by Carl Jonathan Jacklitch and published by . This book was released on 2016 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: In December, 2013, a rockfall occurred in the town of Rockville, Utah, where an estimated 2700 tons (2450 tonnes) of rock detached from a 400 ft (122 m) slope and fell on a house, resulting in two fatalities. The primary objectives of this study were to assess the hazard potential of the east-west trending, south-facing, slope throughout the town to identify the sections that pose the highest hazard potential of causing injury or property damage and to identify the modes of slope failure in order to suggest potential remedial measures. The hazard potential was assessed through detailed field and laboratory investigations of four sites along the slope. Field investigations included mapping discontinuities, establishing site stratigraphy, and measuring slope geometry. Laboratory investigations included determining the dry density, slake durability index, and friction angle of rock samples. A stereonet analysis, using the DIPS software, determined the principle joint sets for use in the kinematic analysis. The maximum rollout distances for various block sizes were determined for each of the study sites, using the RocFall software. Results of the kinematic analysis and field observations indicate that wedge, plane, and toppling failures are possible within the Shinarump Conglomerate member of the Chinle Formation and the Upper Red member of the Moenkopi Formation along the entire slope. Based on the results of kinematic analysis, frequency of freeze-thaw cycles during the winter months, role of differential weathering in promoting slope failures, slope height, slope angle, and the proximity to the slope of the homes throughout the town, a rockfall hazard map was generated to demonstrate that the western portion of the town faces the highest hazard from potential rockfalls. Rollout distances, determined from rockfall simulations, were used to determine the maximum extent of the hazard zone. The current hazard map, developed by the Utah Geological Survey, tends to be more conservative than the hazard map generated from this study. The most effective remedial measure, in terms of cost and feasibility, is avoiding building close to hazardous slopes. Other possible remedial measures may include rock bolts for the larger rock blocks along with a drapery mesh on the slopes, or the extremely careful removal of loose rock blocks along with a drapery mesh to retain smaller rock blocks. If no actions are taken to remediate the slope, the potential for large rockfalls, causing damage and possible injury or fatality, will continue to exist.
Download or read book Rockfall Concrete Barrier Evaluation and Design Criteria written by Anil Patnaik and published by . This book was released on 2015 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rockfall is the movement of rocks down a slope which may be in the form of freefall, bouncing, rolling and sliding based on the characteristics of slopes and nature of rocks. When the rockfalls reach the roadway, they are hazardous to roadway users. Standardized precast concrete barriers (PCB) or cast-in-place (CIP) concrete barriers are commonly used by Ohio Department of Transportation (ODOT) to protect the affected highways against rockfall hazards. Impact tests were conducted on full-scale PCB and CIP concrete barriers to determine the impact resistance of these types of barriers against rockfall. Manufactured or natural rocks of different sizes and shapes were dropped from ranges of drop heights based on the desired impact energy to capture the performance of these barriers under impact loading. Current ODOT standard details were modified to improve the impact resistance of such barriers. The test results indicated that impact energy absorption capacity of the revised barriers can be increased by more than 100% compared to that of the barriers with the current ODOT standard details. The rollout tests were conducted on three different slopes with CIP concrete barriers constructed at the bottom of these slopes. The first slope was made to an inclination of 30 degrees, the second slope with 45 degrees, and the third slope with 55 degrees. The test rocks were dropped on the top of the slope to roll down and impact the concrete barriers constructed along a ditch at the bottom of the slope. The impacting velocities, the trajectories of the rocks while rolling down the slopes and bounce heights were digitally captured with high speed cameras. The results obtained from rockfall simulation programs such as CRSP were validated using the field measurements obtained from these rollout tests. The results indicated that the predictions obtained from rockfall computer simulation programs generally underestimate the bounce heights and velocities, and consequently the energies delivered by the rocks at the impact location.
Download or read book Rockfall written by A. Keith Turner and published by Transportation Research Board National Research. This book was released on 2012 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Slope Engineering written by Duncan C. Wyllie and published by CRC Press. This book was released on 2017-09-18 with total page 803 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock Slope Engineering covers the investigation, design, excavation and remediation of man-made rock cuts and natural slopes, primarily for civil engineering applications. It presents design information on structural geology, shear strength of rock and ground water, including weathered rock. Slope design methods are discussed for planar, wedge, circular and toppling failures, including seismic design and numerical analysis. Information is also provided on blasting, slope stabilization, movement monitoring and civil engineering applications. This fifth edition has been extensively up-dated, with new chapters on weathered rock, including shear strength in relation to weathering grades, and seismic design of rock slopes for pseudo-static stability and Newmark displacement. It now includes the use of remote sensing techniques such as LiDAR to monitor slope movement and collect structural geology data. The chapter on numerical analysis has been revised with emphasis on civil applications. The book is written for practitioners working in the fields of transportation, energy and industrial development, and undergraduate and graduate level courses in geological engineering.
Download or read book Earth s Dynamic Systems written by William Kenneth Hamblin and published by . This book was released on 2001 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt: The web site hosts a variety of review materials, including maps, images, photographs, and links to external sources of geological data and images. The CD-ROM inc;udes high quality images, videos, animations, narrated "Chalk Talks", and identification modules.
Download or read book Landslides Analysis and Control written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1978 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together, from a wide range of experience, such information as may be useful in recognizing, avoiding, controlling, designing for, and correcting movement. Current geologic concepts and engineering principles and techniques are introduced, and both the analysis and control of soil and rock-slopes are addressed. New methods of stability analysis and the use of computer techniques in implementing these methods are included. Rock slope engineering and the selecting of shear-strength parameters for slope-stability analyses are covered in separate chapters.
Download or read book Rock Slope Stability written by Charles A. Kliche and published by Society for Mining, Metallurgy, and Exploration, Incorporated. This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide for mining and construction engineers responsible for rock slope stability. This book focuses on rock slope stability, with sections on geological data collection, geotechnical data collection and analysis, surface water and groundwater effects, kinematic and kinetic stability analysis, rock slope stabilization techniques, and rock slope instrumentation and monitoring. Because of the discontinuous nature of rock, the design of stable rock slopes is as much an art as it is applied engineering. Experience can only be achieved from the proper utilization of these theories of soil and rock mechanics, structural geology, and hydrology. Rock Slope Stability is invaluable for engineering geologists, geotechnical engineers, mining engineers, civil engineers, and mine managers-- as well as anyone else dedicated to engineering slopes that are stable and safe and that enable a financial return.
Download or read book Landslides Theory Practice and Modelling written by S.P. Pradhan and published by Springer. This book was released on 2018-06-28 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, with contributions from international landslide experts, presents in-depth knowledge of theories, practices, and modern numerical techniques for landslide analysis. Landslides are a reoccurring problem across the world and need to be properly studied for their mitigation and control. Due to increased natural and anthropogenic activities, chances of landslide occurrence and associated hazards have increased. The book focuses on landslide dynamics, mechanisms and processes along with hazard mitigation using geo-engineering, structural, geophysical and numerical tools. The book contains a wealth of the latest information on all aspects of theory, practices and modelling tools and techniques involved in prediction, prevention, monitoring, mitigation and risk analysis of landslide hazards. This book will bring the reader up to date on the latest trends in landslide studies and will help planners, engineers, scientists and researchers working on landslide engineering.
Download or read book Engineering Geology for Society and Territory Volume 4 written by Giorgio Lollino and published by Springer. This book was released on 2014-08-12 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is one out of 8 IAEG XII Congress volumes, and deals with the processes occurring on the coastal zone, which represents a critical interface between land and sea, as the contribution of the ocean to the provision of energy and mineral resources will likely increase in the coming decades. Several related topics fit into this volume, such as: coastal developments and infrastructures; dredging and beach re-nourishment; sediment erosion, transport and accumulation; geohazard assessment; seafloor uses; seabed mapping; exploration and exploitation of the seafloor, of the sub-seafloor, and of marine clean energies and climatic and anthropogenic impacts on coastal and marine environments. Examples of specific themes are coastal management and shore protection, taking into account storm-related events and natural and anthropogenic changes in the relative sea level, planning of waste disposal, remedial works for coastal pollution, seafloor pipeline engineering, slope stability analysis, or tsunami propagation and flooding. The Engineering Geology for Society and Territory volumes of the IAEG XII Congress held in Torino from September 15-19, 2014, analyze the dynamic role of engineering geology in our changing world and build on the four main themes of the congress: environment, processes, issues and approaches. The congress topics and subject areas of the 8 IAEG XII Congress volumes are: 1. Climate Change and Engineering Geology 2. Landslide Processes River Basins 3. Reservoir Sedimentation and Water Resources 4. Marine and Coastal Processes Urban Geology 5. Sustainable Planning and Landscape Exploitation 6. Applied Geology for Major Engineering Projects 7. Education, Professional Ethics and Public Recognition of Engineering Geology 8. Preservation of Cultural Heritage.
Download or read book Rock Slope Engineering written by Evert Hoek and published by CRC Press. This book was released on 1981-06-30 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic handbook deals with the geotechnical problems of rock slope design. It has been written for the non-specialist mining or civil engineer, with worked examples, design charts, coverage of more detailed analytical methods, and of the collection and interpretation of geological and groundwater information and tests for the mechanical properties of rock.
Download or read book Chesapeake Bay Hydraulic Model written by and published by . This book was released on 1982 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Slope Stability and Stabilization Methods written by Lee W. Abramson and published by John Wiley & Sons. This book was released on 2001-11-01 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major revision of the comprehensive text/reference Written by world-leading geotechnical engineers who share almost 100 years of combined experience, Slope Stability and Stabilization, Second Edition assembles the background information, theory, analytical methods, design and construction approaches, and practical examples necessary to carry out a complete slope stability project. Retaining the best features of the previous edition, this new book has been completely updated to address the latest trends and methodology in the field. Features include: All-new chapters on shallow failures and stability of landfill slopes New material on probabilistic stability analysis, cost analysis of stabilization alternatives, and state-of-the-art techniques in time-domain reflectometry to help engineers plan and model new designs Tested and FHA-approved procedures for the geotechnical stage of highway, tunnel, and bridge projects Sound guidance for geotechnical stage design and planning for virtually all types of construction projects Slope Stability and Stabilization, Second Edition is filled with current and comprehensive information, making it one of the best resources available on the subject-and an essential reference for today's and tomorrow's professionals in geology, geotechnical engineering, soil science, and landscape architecture.
Download or read book Land Disposal of Hazardous Waste written by J. R. Gronow and published by . This book was released on 1988 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: A workshop was conducted in the Fall of 1987 at the Univ. of Cambridge to: a) discuss major issues related to land disposal of hazardous toxic wastes and engineering and environmental issues related to such disposal; and b) to assess emerging technologies and research efforts focussing on hazardous toxic waste management. Keywords: Chemical industries; Landfills; United States; Groundwater pollution control; Hydraulic conductivity of soils; Monitoring fluid leakages; Fluid leakage detection; Risk analysis; Long range time; Environmental impact estimates; Computerized simulation; Acid wastes; Transport properties; Leachate migration; Waste containment; Flexible membrane liners; Radioactive waste management; Engineering geology; West Germany; Great Britain. (EDC).
Download or read book Landslides written by A. Keith Turner and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to using the Public Record Office (PRO) in England for English or Welsh genealogical research, providing an introduction to PRO record classes of interest to North American researchers and identifying PRO records available in North American institutions. Includes advice for finding sources of emigration and immigration records, with appendices on local record offices in England and Wales and useful addresses. Annotation copyright by Book News, Inc., Portland, OR.
Download or read book Slope Stability Analysis and Stabilization written by Y. M. Cheng and published by CRC Press. This book was released on 2008-06-03 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of methods currently exist for the analysis and design of slopes. This book provides a critical review of these and offers several more appropriate approaches for overcoming numerical convergence and the location of critical failure surfaces in two-dimensional and three-dimensional cases. New concepts in three-dimensional stability analysis, finite element analysis and the extension of slope stability problems to lateral earth pressure problems are also addressed. It gives helpful practical advice and design resources in the form of recommendations for good analysis and design practice, design charts and tables for the engineer. Limitations are detailed of both limit equilibrium and the finite element method in the assessment of the stability of a slope, and guidance is provided for assessing the fundamental assumptions and limitations of stability analysis methods and computer modelling. The book provides ample examples to illustrate how this range of problems should be dealt with. The final chapter touches on design and its implementation on site. The emphasis is on the transfer of the design to its physical implementation on site in a holistic way, taking full account of the latest developments in construction technology. Engineering and construction problems tend to be pigeonholed into different classes of problem such as slope stability, bearing capacity and earth pressure behind retaining structures. This is quite unnecessary. This book offers a unified approach, which is conceptually, practically and philosophically more satisfying.
