Download or read book Seepage Monitoring in Embankment Dams written by Sam Johansson and published by . This book was released on 1997 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instrumentation Monitoring and Surveillance Embankment Dams written by A.D.M Penman and published by Routledge. This book was released on 2018-05-02 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Besides giving an historical introduction to embankment dams the book describes the need for instrumentation, planning procurement and installation practices of instruments. The significance of visual inspection and techniques, of monitoring various parameters, seepage, pore pressure, surface and internal displacements, earth pressures and seismic behaviour, through instrumentation has been described. Collection and processing of data and their use for back analysis to check stability of a dam at various stages of construction and reservoir filling have been suggested. In addition to case histories quoted in various chapters, an exclusive chapter on select case histories has been added which describes the conventional and latest instruments that are being used and methods adopted for installation, monitoring and analyses of data.
Download or read book Seepage Monitoring and Diagnosis of Distresses in an Earth Embankment Dam Using Probability Methods written by Seyed Mohammad Reza Mousavian and published by . This book was released on 2017 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Failure of embankment dams may result in catastrophic consequences. Considering seepage and internal erosion are accounted as one of the major causes of failure in earth embankment dams, it is essential to detect any concentrated seepage and sources of distress at early stages. A number of investigation and monitoring methods exist for the detection of seepage, with varying degrees of technological and implementation complexity. This research, focuses on the Electrical Resistivity Monitoring Method (ERM), and develops a condition assessment process that allows 1) the identification of potential seepage areas and progress through visual observation and flow measurement, and 2) the determination of the most likely paths where piping may have occurred.
Download or read book An Introduction to Seepage Mitigation in Embankment Dams written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2020-01-28 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil and geotechnical engineers and construction managers interested in seepage at earth and rockfill embankment dams. Here is what is discussed: 1. GENERAL 2. SEEPAGE CONTROL MEASURES 3. SEEPAGE REDUCTION MEASURES 4. TEMPORARY EMERGENCY MEASURES 5. SEEPAGE MONITORING
Download or read book An Introduction to Seepage Mitigation in Embankment Dams written by J Paul Guyer and published by . This book was released on 2020-01-28 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil and geotechnical engineers interested in seepage mitigation for earth and rock fill embankment dams. Here is what is discussed:1. GENERAL2. SEEPAGE CONTROL MEASURES3. SEEPAGE REDUCTION MEASURES4. TEMPORARY EMERGENCY MEASURES5. SEEPAGE MONITORING.
Download or read book Embankment Dam Instrumentation Manual written by Charles L. Bartholomew and published by . This book was released on 1987 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embankment Dams written by United States. Bureau of Reclamation and published by . This book was released on 1990 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Seepage Failure Modes in Embankment Dams written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2020-10-10 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil and geotechnical engineers and construction managers interested in failure modes due to seepage at embankment dams. Here is what is discussed: 1. DEFINITION OF TERMS 2. SEEPAGE-RELATED ISSUES AND FAILURE MODES 3. KEY DATA FOR SEEPAGE EVALUATIONS.
Download or read book Evaluation and Monitoring of Seepage and Internal Erosion Interagency Committee on Dam Safety Fema P 1032 May 2015 written by U. S. Federal Emergency Management Agency and published by Createspace Independent Publishing Platform. This book was released on 2017-04-19 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal erosion through and under embankments poses one of the greatest threats to satisfactory performance of these type of water retention structures. This document addresses various processes of internal erosion that can occur in soils and how that erosion can, in some cases, result in failure of a dam or levee. Considerations for identifying and understanding potential failure modes and risks related to internal erosion of embankment and foundation materials are presented to aid practitioners in identifying conditions that adversely affect dam safety. Various monitoring methods that can be used to detect evidence of internal erosion as well as methods for long-term performance monitoring are also presented. Possible emergency response actions for short-term risk reduction and numerous approaches of long-term mitigation of internal erosion risks are included. This document addresses evaluation and monitoring of seepage and internal erosion in an effort to collect and disseminate information and experience that is current and has a technical consensus. It is recognized, though, that the study of internal erosion continues to evolve and that not all phases of the process are completely understood. While research continues into these processes, this document attempts to present the best understanding based on current Federal agency practice. Hence, very recent or new, unproven technologies are not discussed. The authors also acknowledge that there are some minor variations in practice for evaluation and monitoring of seepage and internal erosion among the various Federal agencies. They have tried to focus on what they judged to be the "best practice" and included that judgment in this document. Therefore, this document may be different than some of the various participating agencies' own internal practices. Procedures and guidance for "best practices" concerning the evaluation and monitoring of seepage and internal erosion are provided. Currently available information was reviewed, and when detailed documentation existed, it was cited to avoid duplicating available materials. The authors have strived not to reproduce information that was readily accessible in the public domain and attempted to condense and summarize the vast body of existing information and provide a clear and concise synopsis of this information. This document is intended for use by personnel familiar with embankment dams and levees, such as designers, inspectors, construction oversight personnel, engineering geologists, and dam safety engineers.
Download or read book Guidelines for Instrumentation and Measurements for Monitoring Dam Performance written by Task Committee on Instrumentation and Monitoring Dam Performance and published by ASCE Publications. This book was released on 2000-01-01 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared by the Task Committee on Instrumentation and Monitoring Dam Performance of the Hydropower Committee of the Energy Division of ASCE. This report is a handy and comprehensive source of information for dam owners, engineers, and regulators about instrumentation and measurements for monitoring performance of all types of dams. It presents the methodology and process for the selection, measurement instruments and techniques, installation, operation, maintenance, use, and evaluation of instrumentation and measurement systems for dams, appurtenant structures, their foundations, and environment. Topics include: factors affecting dam performance, means and methods of monitoring dam performance, planning and implementation of a monitoring program, data evaluation and reporting, and decision making. Case histories of instrumentation and monitoring programs at specific dams are provided for the reader. Product Review "I highly recommend this comprehensive reference on instrumentation used to evaluate dam performance. All owners, engineers, and regulators of dams should own a copy of this book." ?Fred Sage, Field Branch Chief, California Division of Safety of Dams
Download or read book Instrumentation Monitoring and Surveillance Embankment Dams written by A.D.M Penman and published by Routledge. This book was released on 2018-05-02 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Besides giving an historical introduction to embankment dams the book describes the need for instrumentation, planning procurement and installation practices of instruments. The significance of visual inspection and techniques, of monitoring various parameters, seepage, pore pressure, surface and internal displacements, earth pressures and seismic behaviour, through instrumentation has been described. Collection and processing of data and their use for back analysis to check stability of a dam at various stages of construction and reservoir filling have been suggested. In addition to case histories quoted in various chapters, an exclusive chapter on select case histories has been added which describes the conventional and latest instruments that are being used and methods adopted for installation, monitoring and analyses of data.
Download or read book Catalog of FEMA Dam Safety Resources written by and published by FEMA. This book was released on 2008 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Geophysical Methods for Assessing Seepage and Internal Erosion in Embankment Dams written by Sam Johansson and published by . This book was released on 2005 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resistivity and Surface Wave Seismic Surveys in Geotechnical Site Investigations written by Pontus Sjödahl and published by . This book was released on 2005 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dam Surveillance Guide written by CIGB ICOLD and published by CRC Press. This book was released on 2018-08-06 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dams are part of human achievements that induce great benefits for society but also bear a potential risk to people, property and the natural environment. The risk of a dam rupture is extremely low and diffi cult to quantify accurately. The aim of ‘Dam surveillance’ (ICOLD Bulletin 158), is to help reduce these risks by early detection of an undesirable event. The objective of dam surveillance is to make a precise and timely diagnosis of the behavior of dams, in order to prevent undesirable consequences. Both the monitoring system and surveillance program has to be designed and should be able to detect any abnormal behaviour. ‘Dam surveillance’ (ICOLD Bulletin 158), emphasizes the following aspects: • Routine visual inspection • Special inspection • Checking and testing of Hydro-electromechanical equipment • Monitoring parameters and devices • Automation • Maintenance of ageing monitoring systems • Re-instrumentation of existing dams • Recent developments • Data management • Dam documentation management • Assessment of dam condition and behaviour • Assessment of routine dam safety monitoring programme • Prioritization of maintenance, remedial and upgrading works.
Download or read book Commissioning a Three dimensional Electrical Resistivity Imaging System for Seepage Monitoring at an Embankment Dam Abutment written by Daniel Boulay and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mactaquac Generating Station is a large (660 MW) hydroelectric facility on the Saint John River, approximately 19 km upstream from Fredericton, New Brunswick. An alkali-aggregate reaction within the dam's concrete structures is causing their differential expansion. This has prompted the dam's operator, NB Power, to be proactive in monitoring for any signs of concentrated seepage that could arise where the dam's clay till core abuts a concrete diversion sluiceway. Seepage is a leading cause of dam failures. An emerging method to non-invasively investigate an embankment's interior is Electrical Resistivity Imaging (ERI). ERI is sensitive to changes in water saturation, temperature and ionic content, all of which can be indicators for localized seepage. In this work, a 100 electrode areal array was installed to focus on the interface between the embankment and its concrete abutment.Numerous hurdles and challenges were solved throughout this work. The installation of a durable and effective array was achieved by drilling into the slope and injecting bentonite into the drill holes before driving in long (0.91 m) electrodes to keep contact resistances low. Limitations posed directly by the relatively short survey line lengths on the back of the dam were mitigated by implementing a pole-dipole survey geometry which yields relatively large depths of exploration and maintained sensitivity near the ends of the lines. An enigmatic current regulation issue, which affected repeatability, was solved by customization of measurement array geometries and by averaging many surveys over time with a smart-averaging processing routine designed to reject outlier measurements. Many necessary changes were made to electrode array configuration over the course of the study and data quality has steadily improved. Early results are encouraging, yielding repeatable resistivity models for the embankment that are consistent with its internal structure. Time lapse surveys were successful in observing localized resistivity changes in the embankment, interpreted as seasonal temperature change. Also observed were small resistivity change anomalies within and just outside the core of the embankment, which are inferred to be consequences of changes in saturation and water temperature as well as road salt presence in the winter. Localized seasonal resistivity anomalies have been identified that are suggestive of two paths for elevated seepage: i) water passing through the concrete abutment and entering the rockfill on the downstream of the core, and ii) a possibility of elevated seepage through the core adjacent to the abutment. Further seasonal monitoring as well as incorporating data form electrodes installed across the dam crest will be needed to confidently assess whether seepage through the core is anomalous next to the abutment.
Download or read book Investigation of Geophysical Methods for Assessing Seepage and Internal Erosion in Embankment Dams written by Sam Johansson and published by . This book was released on 2005 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
