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Articles 1 - 29 of 29
Full-Text Articles in Engineering
The Effects Of Heavy Metals On The Chick Embryo Development, Yasmin Alibhai
The Effects Of Heavy Metals On The Chick Embryo Development, Yasmin Alibhai
Theses
The following is a research report on the effects of heavy metals on the avian embryo. A total of eight metals were used in the study. The metalE included were : cobalt, copper, indium, iron, manganese, molybdenum, arsenic and cadmium. A total of 800 eggs were used for the study. Salts of each of the metal were dissolved in physiological saline and injected into the air sacs of white Leghorn chick eggs. Dose levels varied with the metal to be tested. Control eggs were injected with an equivalent volume of saline (0.1 ml per egg). The eggs were injected on …
First International Conference On Case Histories In Geotechnical Engineering, Multiple Authors
First International Conference On Case Histories In Geotechnical Engineering, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Reinforced Flow Retardation Structure At Henshaw Dam, Dennis S. Tarnay
Reinforced Flow Retardation Structure At Henshaw Dam, Dennis S. Tarnay
International Conference on Case Histories in Geotechnical Engineering
The Henshaw Dam is a semi-hydraulic earthfill structure. The seismic studies indicated that the dam could fail by liquefaction during a strong seismic motion. To ensure the integrity of the dam, the reservoir storage was reduced, the old spillway reconstructed, and a new reinforced flow retardation structure was built immediately downstream from the existing dam.
Concluding Session, Multiple Authors
Concluding Session, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Conference Schedule, Multiple Authors
Conference Schedule, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface And Contents - Vol. 1, Multiple Authors
Preface And Contents - Vol. 1, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface And Contents - Vol. 3, Multiple Authors
Preface And Contents - Vol. 3, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface And Contents - Vol. 2, Multiple Authors
Preface And Contents - Vol. 2, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Snapshots Of Conference, Multiple Participants
Snapshots Of Conference, Multiple Participants
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
General Report For The Theme Three – Case Histories In Dams, Embankments And Slopes, D. E. Kleiner
General Report For The Theme Three – Case Histories In Dams, Embankments And Slopes, D. E. Kleiner
International Conference on Case Histories in Geotechnical Engineering
Of the approximately forty papers submitted for sessions 3A and 3B on Case Histories in Dams, Embankments and Slopes, eighteen specifically discuss dams, foundations for dams or tailings dams. Table 1 presents a capsule summary of those papers that discuss dams and their foundations. Table 2 is a similar capsule summary of the five papers that discuss performance, design and/or construction of tailings dams or spoil piles. This general report summarizes and comments on the papers listed in Tables 1 and 2, presents several abbreviated case histories that parallel those presented in the papers, comments on several points not covered …
The Use Of Limited Field Observation In Remedial Design, J. P. Sully, G. I. Mcphail
The Use Of Limited Field Observation In Remedial Design, J. P. Sully, G. I. Mcphail
International Conference on Case Histories in Geotechnical Engineering
As a consequence of a slope failure, an investigation was carried out to determine the present and future stability of a gold tailings dam in the Orange Free State, South Africa. Recommendations were also required concerning the type of remedial measure(s) necessary in order to permit continued deposition of the tailings waste product on the dam. The field and laboratory investigation involved sampling of the tailings and foundation soils and installation of piezometers at various locations around the dam. The paper describes how, using data obtained from a limited monitoring period, evaluation of in-situ parameters enabled prediction of future phreatic …
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering, St. Louis (1984), Multiple Authors
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering, St. Louis (1984), Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Power Station Foundations In Deep Expansive Soil, G. E. Blight, Lethabo Ad Hoc Foundation Committee
Power Station Foundations In Deep Expansive Soil, G. E. Blight, Lethabo Ad Hoc Foundation Committee
International Conference on Case Histories in Geotechnical Engineering
The site for a large (3600 MW) thermal power station is underlain by deep expansive soils which posed difficult conditions for the design of stable foundations. After describing the soil and ground-water conditions and attendant foundation problems, the paper goes on to describe how the amount and rate of heave were predicted. Most of the foundations are piled, but the piles will be subject to uplift as the soil swells. Large scale tests to acquire information for the prediction of uplift forces are described, as well as measures for reducing the uplift forces.
Settlement Of A Building Founded On Difficult Soil, Iqbal H. Khan, Fathi M. Layas
Settlement Of A Building Founded On Difficult Soil, Iqbal H. Khan, Fathi M. Layas
International Conference on Case Histories in Geotechnical Engineering
Many coastal areas in Benghazi have been reclaimed from lagoons. Quite often such areas are covered by debris, rubbish and other artificial fills over many years. The proximity of these deposits to the Mediterranean Sea coupled with the seasonal moisture variations has resulted in the formation of the so-called Sabkha soils having a high proportion of chemical content. Settlement records of a four storey building founded on sabkha soil are prescuted for seven years. The building underwent large settlement resulting in a tilt from the vertical. It is found that, for Sabkha soils, the measured settlement is larger than that …
Collapsible Soils Chashma Right Bank Canal, Izharul Haq
Collapsible Soils Chashma Right Bank Canal, Izharul Haq
International Conference on Case Histories in Geotechnical Engineering
In 1979-81 a stretch of 10 miles of Chashma Right Bank Canal was excavated and double layer brick tile lining was done. The lining was cured by flooding it with water through open drains made on either berm of lining. A couple of months after the completion of the lining, horizontal cracks were observed on either bank. Field density, moisture measurements, Soil classification and double Oedometer tests were performed. In situ water pending tests were also conducted. The observations and the test results revealed that the cracks were the consequence of collapse of silty low density soil due to saturation. …
Use Of Ground Anchors In Residual Soils, R. Kannan, Bengt B. Broms
Use Of Ground Anchors In Residual Soils, R. Kannan, Bengt B. Broms
International Conference on Case Histories in Geotechnical Engineering
In the past decade the use of ground anchors in deep basements has increased in most parts of the world, while their applications in Singapore have been very limited so far because of their interference with adjacent properties. Empirical design methods which are adequate in most cases are still commonly used. Analytical design methods and finite element analysis (FEM) which give better insight into the soil-anchor interaction are gaining popularity. Post grouting is often used for anchors in residual soils and has been found successful. Some case histories from Singapore are presented in this paper.
Lessons From Embankment Dam Accidents. An Introduction, V. Perlea
Lessons From Embankment Dam Accidents. An Introduction, V. Perlea
International Conference on Case Histories in Geotechnical Engineering
More than 500 records of embankment dam failures and accidents all over the world, were collected and statistically processed from many points of view. The causes of troubles were classified using a comprehensive scheme. It was found that overtopping is the main cause of failures and of causalities also. Most of troubles affected small earth darns. More than 50% failures and accidents occurred during construction or in the first two years of operation. The study is completed with an Appendix containing data on all considered events, this giving the possibility to check up, to correct the possible errors and to …
The Failure Of A Soil Blanket Lining Caused By The Action Of Bacteria, G. W. Plant, P. B.B. Voslo
The Failure Of A Soil Blanket Lining Caused By The Action Of Bacteria, G. W. Plant, P. B.B. Voslo
International Conference on Case Histories in Geotechnical Engineering
A raw water storage reservoir was constructed with earth embankments and a soil blanket floor lining. Treated sewage effluent was used as construction water. Bacteria in the soil were capable of converting the organic nitrogen and ammonia present in the effluent to nitrite and then to nitrate under aerobic conditions. This nitrate was reduced to nitrogen gas under anaerobic conditions. The generation of gas had a "leavening" effect on the soil structure of the floor lining leading to a high water permeability, thus making the soil lining ineffective.
The Role Of Case Studies In The Evaluation Of Soil Liquefaction Potential, H. Bolton Seed
The Role Of Case Studies In The Evaluation Of Soil Liquefaction Potential, H. Bolton Seed
International Conference on Case Histories in Geotechnical Engineering
Field evidence concerning soil liquefaction is reviewed and a number of case studies are summarized. Examples of the use of case studies in developing an understanding of the liquefaction phenomenon, both on level ground due to earthquake shaking and in slopes due to earthquake and static stress applications are presented.
Conference Participants, Multiple Participants
Conference Participants, Multiple Participants
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Discussions And Replies, E. J. Armstrong, G. W. Plant, D. H. Shields, John P. Sully, H. Taylor, R. K. Katti, Shri K. K. Moza, Shri D. R. Katti
Discussions And Replies, E. J. Armstrong, G. W. Plant, D. H. Shields, John P. Sully, H. Taylor, R. K. Katti, Shri K. K. Moza, Shri D. R. Katti
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Tower Foundations Bearing Above Weak Soils, T. J. Kaderabek, D. Barreiro, M. A. Call
Tower Foundations Bearing Above Weak Soils, T. J. Kaderabek, D. Barreiro, M. A. Call
International Conference on Case Histories in Geotechnical Engineering
A 13-level reinforced concrete structure was constructed on Marco Island in southwest Florida. The tower is located 200 feet from the Gulf of Mexico and has plan area dimensions of 115 by 170 feet. The field testing revealed the site was mantled with a 17-foot thick layer of firm sand. The sand stratum was underlain by a compressible 9-foot thick layer of silty sand which had an average SPT N-value of less than 2. Various methods of engineering analyses estimated total tower settlements to range from 1 to 8 inches. Actual measured settlement following the application of dead load was …
Dynamic Precompression Treatment - A Case History, F. J. Leon
Dynamic Precompression Treatment - A Case History, F. J. Leon
International Conference on Case Histories in Geotechnical Engineering
An unusual case history of a condominium apartment building, originally designed for eleven storeys, to which four additional floors were added after the footings had already been constructed and was successfully completed to fifteen storeys in height . The use of rather high soil-bearing values, from 7 ksf ( 350 kPa) in the original design to over 12 ksf ( 600 kPa) . The project site , underlain by erratic soil profiles containing layers of soft fine-grained soils to about 20 ft (6 m) below the surface, had been effectively improved with an intense application of the Dynamic Precompression Treatment …
Improvement Of Deep Tubewell Irrigation Project Performance In Bangladesh, Md. Mirjahan Miah
Improvement Of Deep Tubewell Irrigation Project Performance In Bangladesh, Md. Mirjahan Miah
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A computer model for use in predicting the impact of various improvement options on command area expansion of a deep tubewell irrigation system has been developed. A field study was conducted on 11 selected deep tubewells located at two sites, namely Dhamrai and Thakurgaon, in Bangladesh to collect necessary physical data to provide irrigation engineering insight and a basis for testing and application of the model. The results of the investigation revealed that the actual discharge of most of the deep tubewells was lower than the design or rated capacity. The duration of pump operation in the majority of the …
Human Health Effects Assays, Ronald C. Sims, J. L. Sims, R. R. Dupont
Human Health Effects Assays, Ronald C. Sims, J. L. Sims, R. R. Dupont
Biological Engineering Faculty Publications
Current development and use of short-term bioassays to evaluate potential human health hazards of environmental chemical exposure has been the focus of the U. S. Environmental Protection Agency (EPA) Second and Third Symposia on the Ap plication of Short-Term Bioassays in the Analysis of Complex Environmental Mixtures.1'2 Topics addressed included development and applications of bioassays, collection and preparation of environmental samples, characterization of hazardous components using bioassays, and environmental assessment. Bartsch and Tomabis,3 using six mutagenicity assays including sub mammalian and mammalian assays to evaluate the quantitative relationship between carcinogenicity and mutagenicity for 532 chemicals, concluded …
Direct Filtration Versus Conventional Water Treatment In The Intermountain Region, Susan K. Burns, V. Dean Adams, Steel B. Maloney
Direct Filtration Versus Conventional Water Treatment In The Intermountain Region, Susan K. Burns, V. Dean Adams, Steel B. Maloney
Reports
The direct filtration water treatment scheme does not include sedimentation and in some cases flocculation. Compared to conventional treatment, direct filtration has lowered capital costs, reduced space requirements, decreased sludge quantities, and reduced coagulant dosages. One objective of this research was the statistical comparison of the direct filtration, Utah Valley Water Purification Plant (Orem, Utah) and the conventional Little Cottonwood Water Treatment Plant (Salt Lake City, Utah). These treatment plants are the two most compatible treatment plants having the highest correlation of source water in the local area. The Little Cottonwood plant receives approximately 65 percent of its sources water …
Determination Of The Structural Coefficients Of A Foamed Asphalt Recycled Layer, Wijk Adriaan Van
Determination Of The Structural Coefficients Of A Foamed Asphalt Recycled Layer, Wijk Adriaan Van
JTRP Technical Reports
No abstract provided.
Geotechnical Engineering Problems In The Karst Region Of Southern Indiana, Francis T. Adams, C. W. Lovell
Geotechnical Engineering Problems In The Karst Region Of Southern Indiana, Francis T. Adams, C. W. Lovell
JTRP Technical Reports
No abstract provided.