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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

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

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

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

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

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

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

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

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

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

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 …

Irish H & V News

Building Services Engineering

No abstract provided.

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

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

JTRP Technical Reports

No abstract provided.

Geotechnical Engineering Problems In The Karst Region Of Southern Indiana, Francis T. Adams, C. W. Lovell

JTRP Technical Reports

No abstract provided.

H & V News

Building Services Engineering

No abstract provided.

Santa Clara Magazine, Volume 25 Number 8, Spring 1983, Santa Clara University

Santa Clara Magazine

2 - FIRST FRIEND by Robert Meyers. Nevada Senator Paul Laxalt talks about his special relationship with the President of the United States.

6 - A CONVERSATION WITH BROTHER ROGER by Patrick Samway, S.J. An interview with the founder of a remarkable ecumenical community that has become a source of inspiration for Christians everywhere.

11 - JESUIT CHAPLAINS IN WORLD WAR II by Donald F. Crosby, S.J. Chronicling the involvement of 273 Sons of Loyola who marched off as chaplains in World War II.

15 - PSYCHOLOGY AT THE STOCK EXCHANGE by Jerry Kroth. Can psychology provide us with an …

Hydrologic Evaluation Of The Coastal Belt Water Project Sarir And Tazerbo Well Fields, Libya, Edward P. Fisk, Christopher J. Duffy, Calvin G. Clyde, Roland W. Jeppson, Phillip H. Degroot, Bhasker Rao K., Win-Kai Liu

Reports

Executive Summary: The basic purpose of this study was to conduct a finite-element computer model and give an dindependent appraisal of the reliability of the groundwater supply for the proposed Coastal Belt Water Project (CBWP_ Well Fields at Sarir and Tazerbo. There is no doubt that ample quantities of groundwater of acceptable quality occur at the sites selected for these well fields for the estimated 50-year life of the project and longer. Of major concern is the predicted drawdown of wells and total pumping lifts throughout the 50-year period. Excessive drawdowns could cause operating costs to become prohibitibely expensive. Average …

Removal Of Fluoborate From Electroplating Rinse Water By Ion Flotation, Ray Haralson

Dissertations

A problem exists in the removal of fluoborate from electroplating waste rinse water. The normally used waste treatment methods are not effective and the vacuum evaporation process now being tried is expensive and energy intensive. Experiments were conducted and an alternative treatment process which shows substantial removals of the fluoborate was developed. This can be effectively done using ion flotation techniques. A broad range of surfactants were screened for usefulness in this process and it was found that an aliphatic amine acetate was usable in this process. Operating parameters for the process were investigated, and the removal mechanism was determined …

On-Site Excreta Treatment And Disposal In West Africa, Godfrey E. Igbokwe

Retrospective Theses and Dissertations

In operation, liquid from the test facility is circulated through the RHS core. The liquid is heated by passing over the resistance heaters. If the test facility's calibrations are under investigation, the RHS input power and temperatures are compared with those recorded by the test facility. If a collector is under test, the RHS is placed in series with the collector. The power input to the RHS is placed in series with the collector. The power input to the RHS core heaters is adjusted to give a temperature rise through the RHS equal to some fraction (usually one-half to one) …

H & V News

Building Services Engineering

No abstract provided.

Passive Cooling By Natural Ventilation: A Literature Review. Final Report, Task 1. Volumes 1 & 2. 01-29-82. Copies 1, 2, Florida Solar Energy Center, Subrato Chandra

FSEC Energy Research Center®

This is the final report on Task 1 of this contract. This literature review has been prepared in two volumes. Volume one is a summary of the state of the art. Volume two contains a summary of each major reference, a matrix relating the subject matter to various aspects of ventilative cooling and a compilation of airflow around and through buildings observed in wind tunnel studies.

Micro-Scale Hydropower For The Eighties, E. Beatriz Caicedo-Maddison

Retrospective Theses and Dissertations

The objectives of this project are to show the feasibility of micro-hydropower and to provide adequate engineering data for those people who wish to design their own micro system. Nine case studies are reviewed and analyzed in an attempt to determine general design parameters. Comparative data for these studies comes from preliminary permit applications submitted to the Federal Energy Regulatory Commission. Information on such topics as flow measurements, heads, generators and turbine technology are presented. Duration curves are explained with examples using data from a river found in Colombia, South America. Finally, a preliminary design of a micro-hydro facility is …

Passive Cooling By Natural Ventilation: A Literature Review. 11-10-81. 40 P., Florida Solar Energy Center, Subrato Chandra

FSEC Energy Research Center®

The purpose of this paper is to summarize the existing body of knowledge in natural ventilation and point out areas of research the authors have undertaken.

Santa Clara Magazine, Volume 24 Number 1, Fall 1981, Santa Clara University

Santa Clara Magazine

3- MEDIA AND MASS PSYCHOLOGY A not too gentle probe of the news media today. By Jerome Kroth.

9 - SAINTS, DIAMONDS AND BEARS A thoughtful comparison of education , today and 40 years ago. By William J. Rewak, S.J.

12 - SANTA CLARA POTPOURRI A chance to test your memory of campus features.

14 - THREE FOR ALL SEASONS Examining the interrelationship of three great Christian humanists. By Christiaan T. Lievestro.

18 - WHERE IS LOVE? Defining love in the new Catholic marriage law. By Theodore Mackin, S.J.

23 - TRACKING THE HIGH TECH BOOM The Silicon Valley is …

Bulletin - June, 1981, Civil Aviation Medical Association

Browse all Civil Aviation Medical Association Newsletters

An eight page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.

Mining The Deep Seabed Implications For International Law And American Foreign Policy, Steven H. Fitzgerald

Graduate Program in International Studies Theses & Dissertations

Whether or not the United States may someday face a mineral shortage, the need for a coherent, unified minerals policy is critical to national objectives and national security. Deep-sea mining may be the answer to American (and world) mineral needs in the twenty-first century. However, there are numerous problems which must be dealt with and resolved in the near future, in order to enable the U.S. (and the world community) to take advantage of vast undersea resources. Deep-sea mining requires the development of technology, tremendous capital investments, and years of labor before production can begin. U.S. policy makers must decide …

Design Measures To Improve Performance Of Fill Dams Under Earthquake Loading, K. L. Logani

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Fill dams of height 50 meters or more are increasingly being planned, designed and constructed in highly seismic areas of the world. These dams incorporate various earthquake design measures. The design measures have been critically examined. Design guides with respect to free board, core base width, crest width, type and material of core and material of shells have been reviewed. Some examples of actual changes made in the design, for the seismicity of the region have been given (Table II). Finally, a table of pertinent data of over 50 high dams located in highly seismic areas of the world is …

Stabilization Of Three Typical Indiana Aggregates Using Foam Asphalt : Interim Report, Franco Luis Castedo, Robert Lawrence Shofstall

JTRP Technical Reports

No abstract provided.