Specialty Construction Techniques for Dam and Levee Remediation
Author: Donald A. Bruce | Size: 17 MB | Format:PDF | Quality:Unspecified | Publisher: CRC | Year: 2012 | pages: 447 | ISBN: 0415781949
Dam and levee remediation has become more prevalent since the start of the twenty-first century. Given the vastness and complexity of the infrastructures involved, keeping up with maintenance needs is very difficult. Major surges in repair are usually triggered by nature’s wake-up calls, such as hurricanes, floods, and earthquakes.
The challenge has been to develop methods that ensure safe, effective, reliable, and robust solutions for current and future remediation issues. Specialty Construction Techniques for Dam and Levee Remediation presents the state of practice in North American dam and levee remediation as it relates to the use of specialty geotechnical construction techniques, such as anchors, grouting, cutoff (diaphragm) walls, and deep mixing.
The book focuses on the actual construction processes, describing design and performance aspects of remediation where appropriate. Chapters deal with the application of drilling and grouting methods, methods to install mix-in-place (category 2) cutoff structures, excavated and backfilled trenches (category 1), composite cutoff walls, and stabilization using prestressed rock anchors. The book also provides a comprehensive guide to dam and levee instrumentation, covering planning, operating principles, data management, staffing, and automation. As an educational and salutary example of ineffective efforts, the final chapter presents a case history of a series of remediations performed on a single project, which ultimately proved unsuccessful.
A wide range of methods has been developed in response to the challenges that arise in the dam and levee remediation arena and the need for a competitive edge. These new methods are designed and monitored using state-of-the-art techniques, giving rise to the emergence of new intensity and initiative in this field. This book captures this transformation by examining the theory and practice of contemporary remedial techniques, using recent U.S. case histories to provide knowledge and inspiration to readers, both in North America and around the world.
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Over the last twenty years we have witnessed a revolution in ground stabilization in both underground and above-ground applications, thanks largely to the widespread adoption of shotcrete as a medium for support. Shotcrete technology continues to evolve and improve as its utilization increases. From relatively obscure and sporadic beginnings, it has now become central to ground stabilization in mines and tunnels throughout advanced nations in the world, and is increasingly being used in developing nations.
The reasons for this success are clear. Shotcrete offers unrivaled scope for adaptation to varying ground conditions when used for stabilization, and allows flexibility with respect to geometry when used in other applications. The absence of form work and the fact that it conforms to irregular substrates helps to reduce costs, and it can be installed very rapidly. In many situations shotcrete will prove the most economical means of stabilization or construction, and it is more durable than most alternatives. The combination of these factors has made shotcrete the material of first choice in most underground support applications and in an increasing number of above-ground applications. As utilization spreads, new and innovative approaches to construction with this material continue to arise. The engineering basis for analysis and design of shotcrete linings and structures has also improved.
This volume includes a selection of papers describing recent developments in the evolving field of shotcrete technology, written by a wide range of authors from around the world. The subjects range from mining-related ground control requirements, testing and performance characterization, and durability, to nozzleman education and accreditation requirements. The result is a reference providing a useful compendium of recent developments which should appeal to shotcrete technologists and practitioners alike.
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Existing and impending water shortages argue for improving water quantity and quality management. Groundwater Optimization Handbook: Flow, Contaminant Transport, and Conjunctive Management helps you formulate and solve groundwater optimization problems to ensure sustainable supplies of adequate quality and quantity.
It shows you how to more effectively use simulation-optimization (S-O) modeling, an economically valuable groundwater management tool that couples simulation models with mathematical optimization techniques.
Written for readers of varying familiarity with groundwater hydrology and mathematical optimization, the handbook approaches complex problems realistically. Its techniques have been applied in many legal settings, with produced strategies providing up to 57% improvement over those developed without S-O modeling. These techniques supply constructible designs, planning and management strategies, and metrics for performance-based contracts.
Learn how to:
• Recognize opportunities for applying S-O models
• Lead client, agency, and consultant personnel through the strategy design and adaptation process
• Formulate common situations as clear deterministic/stochastic and single/multiobjective mathematical optimization problems
• Distinguish between problem nonlinearities resulting from physical system characteristics versus management goals
• Create an S-O model appropriate for your specific needs or select an existing transferrable model
• Develop acceptable feasible solutions and compute optimal solutions
• Quantify tradeoffs between multiple objectives
• Evaluate and adapt a selected optimal strategy, or use it as a metric for comparison
Drawing on the author’s numerous real-world designs and more than 30 years of research, consulting, and teaching experience, this practical handbook supplies design procedures, detailed flowcharts, solved problems, lessons learned, and diverse applications. It guides you through the maze of multiple objectives, constraints, and uncertainty to calculate the best strategies for managing flow, contamination, and conjunctive use of groundwater and surface water.
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Author: Jorge Carvalho Pais and John Harvey | Size: 8.4 MB | Format:PDF | Quality:Unspecified | Publisher: CRC Press | Year: 2012 | pages: 310 | ISBN: 0415643317
Cracking is recognized as one of the main causes of pavement deterioration, and is the primary cause of the need for maintenance and rehabilitation. Researchers around the world are working on the problem of cracking in asphalt pavements, with the goal of developing better understanding of the mechanics of cracking, creating test methods for assessing the risk of cracking for different materials and designs, and implementing these results into improved design methods and specifications. This Third Conference on Four-point bending held at the University of California, Davis, USA, follows two successful previous conferences, held at the Delft University of Technology, The Netherlands, in 2007, and at the University of Minho, Portugal in 2009. The primary objective of these conferences is to provide an exchange of ideas and experience and to disseminate that knowledge among researchers, government and private agencies and consultants, about the use of the four-point bending test to evaluate stiffness and fatigue resistance of bituminous mixtures. These proceedings include 23 papers from 15 countries that have been subjected to peer review by a scientific committee composed of experts in asphalt materials, design and testing. Themes of the papers cover a range of topics, including modelling of the four-point beam test, applications to mechanistic design, asphaltic materials evaluation, comparisons with other tests and non-asphaltic materials evaluation.
Four Point Bending is of interest to academics and professionals interested in pavement engineering.
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Geotextile encapsulated sand elements are three-dimensional systems manufactured from textile materials, non-woven materials or combinations of textile and non-woven materials that are filled with sand on-site. These systems are relatively new and the number of applications is growing in river and coastal engineering.
Quite often Geosystems are mentioned as a possible solution, but planners, designers and contractors feel rather hesitant about the application of geotextile encapsulated sand elements due to a lack of experience and adequate design rules.
The use of geosystems has the advantage that local material can be applied and that no (expensive) quarry stone needs to be extracted and transported from the mountains to the site. Compared to traditional construction methods (with quarry stone) the application of geotextile sand filled elements may add considerable operational advantages to the execution of marine works and may offer attractive financial opportunities. In the application of geotextile encapsulated sand elements however, proper attention should be paid to the laying down of different responsibilities of the parties in the contract.
In Geosystems. Design Rules and Applications four types of geotextile sand elements are distinguished, each with specific properties: geo-bags, geo-mattresses, geotextile tubes and geotextile containers. The focus is on the use of geosystems filled with sand as a construction in river and coastal engineering. Geosystems filled with sludge are not covered. The chapters “Introduction” and “General design aspects” are followed by four chapters of the same structure dealing with the various systems. Each of these four chapters starts with a general description and applications and ends with a calculation example. Design aspects are dealt with in the remaining paragraphs.
Geosystems. Design Rules and Applications is based on research commissioned by the Dutch Rijkswaterstaat and Delft Cluster. The realisation of the Dutch version was coordinated by a CUR-committee. The English version is a translation of the Dutch version (CUR-publication 217). However, new developments have been added and the text was checked once again and improved. Geosystems. Design Rules and Applications is an essential reference for professionals and academics interested in River and Coastal Engineering, but aims also at those interested in Geotechnical Engineering.
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Hydraulic Fill Manual: For Dredging and Reclamation Works
Author: Jan van 't Hoff and Art Nooy van der Kolff | Size: 191 MB | Format:PDF | Quality:Unspecified | Publisher: CRC Press | Year: 2012 | pages: 672 | ISBN: 0415698448
Without proper hydraulic fill and suitable specialised equipment, many major infrastructure projects such as ports, airports, roads, industrial or housing projects could not be realised. Yet comprehensive information about hydraulic fill is difficult to find. This thoroughly researched book, written by noted experts, takes the reader step-by-step through the complex development of a hydraulic fill project.
Up-to-date and in-depth, this manual will enable the client and his consultant to understand and properly plan a reclamation project. It provides adequate guidelines for design and quality control and allows the contractor to work within known and generally accepted guidelines and reasonable specifications. The ultimate goal is to create better-designed, more adequately specified and less costly hydraulic fill projects.
The Hydraulic Fill Manual covers a range of topics such as:
• The development cycle of a hydraulic fill project
• How technical data are acquired and applied
• The construction methods applicable to a wide variety of equipment and soil conditions, the capabilities of dredging equipment and the techniques of soil improvement
• How to assess the potentials of a borrow pit
• Essential environment assessment issues
• The design of the hydraulic fill mass, including the boundary conditions for the design, effects of the design on its surroundings, the strength and stiffness of the fill mass, density, sensitivity to liquefaction, design considerations for special fill material such as silts, clays and carbonate sands, problematic subsoils and natural hazards
• Quality control and monitoring of the fill mass and its behaviour after construction.
This manual is of particular interest to clients, consultants, planning and consenting authorities, environmental advisors, contractors and civil, geotechnical, hydraulic and coastal engineers involved in dredging and land reclamation projects.
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With most of the easy gas and oil reserves discovered and prices rebounding, companies are now drilling far offshore in extreme weather condition environments. As deepwater wells are drilled to greater depths, engineers and designers are confronted with new problems such as water depth, weather conditions, ocean currents, equipment reliability, and well accessibility. Offshore Structure Design, Construction and Maintenance covers all types of offshore structures and platforms employed worldwide.
The ultimate reference for selecting, operating and maintaining offshore structures, this book provides a road map for designing structures which will stand up even in the harshest environments. The selection of the proper type of offshore structure is discussed from a technical and economic point of view. The design procedure for the fixed offshore structure will be presented and how to review the design to reach the optimum solution. Nonlinear analysis (Push over) analysis will be presented as a new technique to design and assess the existing structure. Pile design and tubular joint with the effect of fatigue loading will be presented also from a theoretical and a practical point of view.
With this book in hand, engineers receive the most up-to-date methods for performing a structural life cycle analysis; implement maintenance plans for topsides and jackets, using non destructive testing. Under water inspection is discussed for hundreds of platforms in detail. Advanced repair methodology for scour, marine growth and damaged or deteriorating members are discussed. Risk based under water inspection techniques are covered from a practical pint of view. In addition, the book will be supported by an online modeling and simulation program with will allow designers to save time and money by verifying assumptions online.
• One stop guide to offshore structure design and analysis
• Easy to understand methods for structural life cycle analysis
• Expert advice for designing offshore platforms for all types of environments
• Save time and money by verifying designs online
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Hi dear friends,
I will appreciate if any body help me who access ACI SPs to share this Proceeding.
Thank you.
SP-217: Seventh CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete
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