Download or read book Variability in the Hydraulic Conductivity of a Test Pad Liner System Using Different Testing Techniques written by Matthew Jonathan Nanak and published by . This book was released on 2013 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historic methods (the time lag approach, the velocity approach, and the Z-t approach), utilized to reduce two stage borehole test data, were evaluated. Two of the historic methods provided viable results and were used for this research project. Additionally, these two methods are recommended for reducing two stage borehole test data in the future. Flexible wall permeameter and soil index laboratory testing were conducted on the soil used to construct three environmentally controlled compacted clay liners (test pads) to develop a zone of acceptance (placement window). Using the results from the laboratory testing, two acceptance criterions were evaluated, while one criterion was used for construction purposes and is recommended. Two stage borehole testing was conducted in Test Pads 1 and 2, while sealed double ring infiltrometer testing was conducted in Test Pad 3. After in-situ hydraulic conductivity testing was completed for Test Pads 1 and 2, Shelby tube and hand carved samples were obtained and laboratory testing was performed on the samples. Time domain reflectometry probes and tensiometers were used to monitor the movement of the wetting front during testing conducted in Test Pad 3. Hydraulic conductivity results obtained from each testing method were compared. The laboratory obtained hydraulic conductivity values from testing conducted on Shelby tube samples were compared to laboratory hydraulic conductivity values obtained from testing conducted on hand carved samples. The laboratory hydraulic conductivity values obtained from testing conducted on Shelby tube and hand carved samples were compared to field hydraulic conductivity values obtained from two stage borehole hydraulic conductivity testing. The field hydraulic conductivity values obtained from two stage borehole hydraulic conductivity testing were compared to field hydraulic conductivity values obtained from sealed double ring infiltrometer hydraulic conductivity testing. Collection of soil specimens using Shelby tubes causes the soil to compress and thereby changes the soil parameters (unit weight and hydraulic conductivity). Results of this research project indicate that comparable hydraulic conductivities within half an order of magnitude can be obtained from two stage borehole and sealed double ring infiltrometer field testing and laboratory testing conducted on hand carved and Shelby tube flexible wall samples.
Download or read book Variability of Hydraulic Conductivity in Sandy Till written by Todd William Rayne and published by . This book was released on 1995 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison Between Various Field and Laboratory Measurements of the Hydraulic Conductivity of Three Clay Liners written by G. Didier and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: For waste facilities, field assessment of the hydraulic conductivity of fine- grained soils has been a real challenge for the past decades that has led to several types of test methods. Although standards (ASTM, NF, etc.) have been adopted in many countries, any test method needs careful application for constructing quality-control programs. The type of apparatus, its geometry, and even specimen preparation may be major sources of discrepancy. We compared hydraulic-conductivity values obtained from various field-testing methods (open, sealed, single and double infiltrometers, and borehole methods), and laboratory-testing methods such as oedometer cells or rigid and flexible-wall permeameters. Three materials were tested in this study: a compacted sandbentonite mixture, compacted clayey silt, and natural sandy clay. The field tests were run on soil-test pads whose characteristics were defined beforehand in the laboratory and the field. Comparison of the results shows a large range of hydraulic-conductivity values for a single soil sample. Such variability can commonly be explained by a scale effect, as demonstrated by the use of various types of diameter or geometry for the field or laboratory tests. Soil behavior (swelling or shrinkage) and test-analysis methods (saturated or unsaturated-flow analysis) are other important parameters. In conclusion, we identified the main problems affecting tests with infiltrometers and permeameters, and how they can be reduced or avoided by the improvement of current techniques.
Download or read book Variability of Hydraulic Conductivity in Sandy Till written by Todd William Rayne and published by . This book was released on 1993 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variability of Hydraulic Conductivity in Uniform Sandy Till Dane County Wisconsin written by Todd William Rayne and published by . This book was released on 1996 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solid Waste Disposal Facility Criteria written by and published by . This book was released on 1993 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Conductivity Testing of Geosynthetic Clay Liners GCLs Using the Constant Volume Method written by XD. Wang and published by . This book was released on 1999 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic conductivity tests were conducted using open and constant-volume permeation systems on specimens from a geosynthetic clay liner (GCL). Two constant volume (CV) systems were employed: the falling-head constant-volume (FHCV) system and the constant-head constant-volume (CHCV) system. A conventional burette system using pressurized air was employed for the open system (OS) tests. The test results show that hydraulic conductivity tests can be conducted 30 or more times faster with the FHCV and CHCV systems than with an open system. Typically the permeation portion of the FHCV and CHCV tests can be conducted in one-half day. Slightly lower hydraulic conductivities are measured with the CV systems due to the slightly higher effective stress applied during testing with these systems. The CHCV system has several advantages over the FHCV system, including minimizing initial transient behavior, constant applied effective stress during testing, and simpler calculations.
Download or read book Assessment of the Performance of Engineered Waste Containment Barriers written by National Research Council and published by National Academies Press. This book was released on 2007-09-22 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: President Carter's 1980 declaration of a state of emergency at Love Canal, New York, recognized that residents' health had been affected by nearby chemical waste sites. The Resource Conservation and Recovery Act, enacted in 1976, ushered in a new era of waste management disposal designed to protect the public from harm. It required that modern waste containment systems use "engineered" barriers designed to isolate hazardous and toxic wastes and prevent them from seeping into the environment. These containment systems are now employed at thousands of waste sites around the United States, and their effectiveness must be continually monitored. Assessment of the Performance of Engineered Waste Containment Barriers assesses the performance of waste containment barriers to date. Existing data suggest that waste containment systems with liners and covers, when constructed and maintained in accordance with current regulations, are performing well thus far. However, they have not been in existence long enough to assess long-term (postclosure) performance, which may extend for hundreds of years. The book makes recommendations on how to improve future assessments and increase confidence in predictions of barrier system performance which will be of interest to policy makers, environmental interest groups, industrial waste producers, and industrial waste management industry.
Download or read book Journal of Geotechnical Engineering written by and published by . This book was released on 1996 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Barrier Systems for Waste Disposal Facilities written by J.R. Booker and published by CRC Press. This book was released on 2004-06-03 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The protection of groundwater and surface water from contamination by the escape of contaminant from waste disposal is now an important consideration in many countries of the world.This book deals with the design of 'barrier systems' which separate waste from the surrounding environment and which are intended to prevent contamination of both ground
Download or read book Canadian Geotechnical Journal written by and published by . This book was released on 2003 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Geotechnics written by A. Bouazza and published by CRC Press. This book was released on 2021-07-01 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents proceedings from the first Australian-New Zealand Geoenvironment conference. The conference provides a forum for researchers and practitioners in the region to exchange ideas, share information and discuss the effective management of the geoenvironment.
Download or read book Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering written by The Organizing Committee of the 16th ICSMGE and published by IOS Press. This book was released on 2005-09-12 with total page 3742 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 16th ICSMGE responds to the needs of the engineering and construction community, promoting dialog and exchange between academia and practice in various aspects of soil mechanics and geotechnical engineering. This is reflected in the central theme of the conference 'Geotechnology in Harmony with the Global Environment'. The proceedings of the conference are of great interest for geo-engineers and researchers in soil mechanics and geotechnical engineering. Volume 1 contains 5 plenary session lectures, the Terzaghi Oration, Heritage Lecture, and 3 papers presented in the major project session. Volumes 2, 3, and 4 contain papers with the following topics: Soil mechanics in general; Infrastructure and mobility; Environmental issues of geotechnical engineering; Enhancing natural disaster reduction systems; Professional practice and education. Volume 5 contains the report of practitioner/academic forum, 20 general reports, a summary of the sessions and workshops held during the conference.
Download or read book Soils and Fertilizers written by and published by . This book was released on 1996 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Time Lag and Soil Permeability in Ground water Observations written by Mikael Juul Hvorslev and published by . This book was released on 1951 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Conductivity and Waste Contaminant Transport in Soil written by David Edwin Daniel and published by ASTM International. This book was released on 1994 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt:
