Engineering Commons^™

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 …

Irish H & V News

Building Services Engineering

No abstract provided.

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.

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 …

H & V News

Building Services Engineering

No abstract provided.

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.

A Laboratory Investigation On The Use Of Foamed Asphalt For Recycled Pavements : Interim Report, Michael Brennan

JTRP Technical Reports

No abstract provided.

Bulletin 3929 - Irrigation In Western Australia, K S. Cole

Bulletins - 3000 - 3999

Irrigation is essential in many parts of the world to produce essential food and profitable cash crops. Generally, those areas of land with less than 360 mm of rain spread over a distinct wet season of several months cannot grow crops for food or cash on rainfall alone. Then irrigation becomes necessary unless some peculiarity such as an oasis exists.

The Need For A Schema For The Classification Of Transitional (Shale) Materials, Robert C. Deen

Kentucky Transportation Center Research Report

The need for comprehensive information on the characteristics and behavior of earth materials has been recognized for many years, perhaps for as long as significant construction has taken place in and on the surface of the earth. In recent years, however, the magnitude and complexity of engineered construction has greatly increased, resulting in a corresponding increase in the need for information on the engineering properties of soil and rock materials for use in site selection, design, construction, and maintenance of major structures. Probably the most pressing need for such data is for use in preliminary considerations of site selection and …

H & V News

Building Services Engineering

No abstract provided.

H & V News

Building Services Engineering

No abstract provided.

Irish H & V News

Building Services Engineering

No abstract provided.

A Solar Water Heater For Honduran People, Manuel De Jesus Umana Guerrero

Graduate Research Papers

The purpose of this study is twofold:

1. To help Honduran people by giving them basic ideas about how they can reduce their expenses using solar energy in the water heating process.

2 . To assist the Technical Educational Department at the Escula Superior Profesorado ''Francisco Moraran, " in Honduras, in identifying contents associated with Energy Sources.

Irish H & V News - April & May Combined

Building Services Engineering

No abstract provided.

The Development And Application Of A Standard Compaction-Degradation Test For Shales : Interim Report, Barney Conrad Hale

JTRP Technical Reports

No abstract provided.

Irish H & V News

Building Services Engineering

No abstract provided.

Irish H & V News

Building Services Engineering

No abstract provided.

Cost Allocation Alternatives For The Senegal River Development Program, J. Paul Riley, Jay C. Andersen, A. Bruce Bishop, David S. Bowles, John E. Keith

Reports

The primary purpose of the study reported herein is to present methods for using estimated project benefits as the basis for distributing the capital, oeprating, maintenance, and replacement costs associated with the proposed Senegal River development program. The problem is complicated because the Senegal River is an international stream, so that it is necessary to consider not only the various economic use sectors involved with the program, but also the three separate countries of Mali, Mauritania, and Senegal. In attempting to meet the primary objective stated above, the report proposes an economic model which estimates economic benefits of the development …