Engineering Commons^™

Geotechnical Characterization Of Subsoil Deposits At Cairo, Mohamed A. El-Sohby, S. Ossama Mazen

International Conference on Case Histories in Geotechnical Engineering

As a result of considering the historical aspects in Cairo subsoil at different stages of its development, soil deposits in the alluvial plain in Cairo area could be identified and classified on their origin into limited number of major types. Their distribution could be produced on maps on which classes of engineering significance are recognized. The boundaries between map units have been drawn separating areas of equal origin and characteristics. Verification of soil profile from field investigation indicated complete agreement with the previous characterization based on theoretical considerations.

Grouting A Water Tower Foundation In A Carbonate Formation, Dorairaja Raghu, David Antes, Joseph J. Lifrieri

International Conference on Case Histories in Geotechnical Engineering

Grouting the cavities in cavernous carbonate formations is one of the techniques employed to achieve reliable bearing support for structures founded in and on such rock units. For this purpose, conventional exploration methods, such as test borings and geophysical measurements, can be employed to obtain the necessary subsurface data; but, they are usually limited in extent, expensive, time consuming, and can be misleading. These limitations can be overcome by employing percussion probing techniques. A case history is cited wherein percussion probing was successfully employed.

A Proposed Procedure For The Identification Of Dispersive Soils, H. J. Von M. Harmse, F. A. Gerber

International Conference on Case Histories in Geotechnical Engineering

The piping failure of the Senekal dam and many other small dams in South Africa, despite the use of apparently sound material and good control during construction, emphasizes the need for a method to unambiguously identify dispersive soils. Physical and chemical tests of one hundred and seventy soil samples were evaluated against the double hydrometer method, after removal of free salts. The chemical methods based on characterization of the exchange complex (CEC and ESP) gave consistently more reliable results than the physical tests, such as the pinhole, crumb and sticky point tests and even the double hydrometer test when free …

Failure Of Railway Embankment, J. Christodoulias, H. Giannaros

International Conference on Case Histories in Geotechnical Engineering

This article deals with the failure of a railway embankment in North Peloponese. The geotechnical investigation that followed aimed to specify the causes of the failure. The results of the above investigation are presented, an evaluation of the causes of failure is discussed and the remedial measures which 'have been taken are thoroughly described.

Field Observation And Finite Element Analysis Of A Subway Excavation, Roberto Azevedo, Luis Anibal Santos

International Conference on Case Histories in Geotechnical Engineering

This paper analyzes a braced excavation executed during the construction of Rio de Janeiro City subway along a street (Catete Street) in which several old and historical buildings existed and should be preserved. The excavation had an average depth of 13 meters and was executed almost ten years ago in a subsoil in which the principal problems were caused by a 6 meters thick loose sand layer, underlaid by a 4 meter thick silty organic clay layer. Several buildings were damaged and had to be repaired. The objective of this paper is to show that even using the incomplete laboratory …

Bioavailable Phosphorus In The Bear River System, Utah, Kenneth Warren Barker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The bioavailable fraction of phosphorus (BAP) in the lower Bear River system waters was investigated. BAP plays a critical role as the limiting nutrient for algal production and eutrophication in proposed reservoirs in the Bear River system. The Bear River system has a hardness ranging between 180-240 mg/L as CaCO₃ which significantly affects BAP.

BAP estimation was done by a modified Selenastrum capricornutum Printz Algal Assay Bottle Test. The algal bioassay is considered the best estimator of BAP because no chemical tests or indicator parameters are available. Autoclaving and UV radiation were found to be unacceptable means for sterilization …

Comparison Of Subsurface Cavity Investigations Using Earth Resistivity, Seismograph And Ground Penetrating Radar, Dennis M. Filler

Retrospective Theses and Dissertations

Sinkhole formation in the Central Florida area has become a serious problem. The subsurface exploration method for cavity detection is indeed needed prior to sinkhole development. this research study compares the effectiveness of earth resistivity, seismograph and ground penetrating radar (GPR) methods in the detection of subsurface cavities. A resistivity instrument measures a material's resistance to electric currents. The seismograph measure the propagation velocity of a medium refracting compressional waves. The GPR transmits and receives electromagnetic pulses reflecting off subsurface interfaces.

Tests were conducted at two sites: a model test site at the University of central Florida, Orlando, and a …

Evaluation Of The Coordination Of Weigh-In-Motion Truck: Fy86 Rtap Wim Project, John Daniel Riverson, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

An Evaluation Of Effects Of Routine Maintenance On Highway Surface Conditions : Informational Report, Turki Ibrahim. Al-Suleiman, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Prediction Of Erosion On Cut Or Fill Slopes, Jen-Chen Fan

JTRP Technical Reports

No abstract provided.

Irish H & V News

Building Services Engineering

No abstract provided.

Remarks: Frank Shafroth, Frank Shafroth

Kentucky's Annual Forum on Transportation

The conference date of this session should be March 19, 1987 instead of March 21, 1987.

Development Of Design Criteria For Ferritic Stainless Steel Cold-Formed Structural Members And Connections, Pieter Van Der Merwe

Doctoral Dissertations

"This dissertation describes the development of the basic criteria needed for the design of structural members cold-formed from certain ferritic stainless steels. The Allowable Stress Design method as well as the Load and Resistance Factor Design method receive attention. The ferritic stainless steels under consideration are: Types AISI 409 and 430 as well as a modified Type 409 steel, designated 3CR12 steel, developed and produced by the speciality steel producing company, Middelburg Steel and Alloys in South Africa.

The mechanical properties needed for structural design are established. It is shown through an experimental study that the design provisions for the …

Evaluation Of The Coordination Of Weigh-In-Motion Truck Data In Indiana (Fy86 Rtap Wim Project) : Interim Report, John Daniel Riverson, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Irish H & V News

Building Services Engineering

No abstract provided.

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

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Conference Schedule, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Preface And Contents - Vol. 2, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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

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

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

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

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

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. …