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Articles 31591 - 31620 of 40071

Full-Text Articles in Engineering

Experimental Approach Embankments At Salt Fork River Bridges On Us 177 And Their Initial Performance, John M. Benson, Donald R. Snethen Mar 1998

Experimental Approach Embankments At Salt Fork River Bridges On Us 177 And Their Initial Performance, John M. Benson, Donald R. Snethen

International Conference on Case Histories in Geotechnical Engineering

This paper presents preliminary findings based on the initial performance evaluation of five approach embankments used in a bridge replacement project over the Salt Fork of the Arkansas River on US Highway 177 in Noble and Kay Counties, Oklahoma. The research involved instrumentation and measurement of four experimental approach embankments and one control approach embankment, all with similar dimensions. Instrumentation inc1uded total pressure cells to measure lateral earth pressure against the abutment wall, inclinometer casings to measure lateral movement of the backfill material and abutment walls, telescoping couplings on the inclinometer casings to measure settlement of the backfill and foundation, …

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Failure Of A Pipeline In An 800-Year Old Debris Fill, D. G. Anderson, C. C. Sundberg, R. J. Robertson Mar 1998

Failure Of A Pipeline In An 800-Year Old Debris Fill, D. G. Anderson, C. C. Sundberg, R. J. Robertson

International Conference on Case Histories in Geotechnical Engineering

In June of 1994 a 20-m section of 1.4-m diameter, restrained-joint, ductile iron pipe failed during construction of a new section of water pipeline for the city of Cairo in the Arab Republic of Egypt. The failure occurred in an area where the pipe was supported on piles, and compacted silica sand was used as side support for the pipe. Soil above the crown of the failed section of pipe was 6 m or more in thickness. Results of a detailed review of the failure revealed that a number of unique and related factors apparently caused the failure. The most …

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Geotechnical Risk And Reliability From Theory To Practice, Lenka S. Timiovska Mar 1998

Geotechnical Risk And Reliability From Theory To Practice, Lenka S. Timiovska

International Conference on Case Histories in Geotechnical Engineering

Indeterminate combined with evaluating the safety of existing lifeline systems are, large and here one would expect format risk and reliability techniques to have found their most urgent need. Besides, risk analysis has languished in safety practice, is only now beginning to appear in established safety programs in my country. It is of interest to explore the reasons why this has been so, and to point the way to the adaptations that are necessary if risk analysis is to assume its deserved role in life-line systems and related areas of geotechnical practice. This paper has proposed that geotechnical conditions are …

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Identification Of Potential Seepage Locations Along The Herbert Hoover Dike, Lake Okeechobee Fl., By Electromagnetic Geophysical Method. Prediction And Confirmation., Anthony L. Dipiero, Robert Ross, Samuel R. Honeycutt, Richard D. Lewis Mar 1998

Identification Of Potential Seepage Locations Along The Herbert Hoover Dike, Lake Okeechobee Fl., By Electromagnetic Geophysical Method. Prediction And Confirmation., Anthony L. Dipiero, Robert Ross, Samuel R. Honeycutt, Richard D. Lewis

International Conference on Case Histories in Geotechnical Engineering

This case history demonstrates the use of electromagnetic (EM) induction methods to examine known seepage locations and then predict future ones along the Herbert Hoover Dike (HHD) in south central Florida. The HHD forms an embankment dam 20 to 30 feet high and 140 miles long surrounding Lake Okeechobee. Approximately 26 miles of embankment was surveyed with EM induction. The objective of the EM survey was to identify active and potential foundation seepage locations and conduits. Areas of greater conductivity were often associated with seepage locations observed during a record high water event in October, 1995. These problems included boils …

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Shopping Center Saved By Short Aggregate Piers, Thomas W. Blackburn, Tom M. Farrell Mar 1998

Shopping Center Saved By Short Aggregate Piers, Thomas W. Blackburn, Tom M. Farrell

International Conference on Case Histories in Geotechnical Engineering

We were faced with an extraordinary geotechnical challenge; our client wanted to support large tilt wa11 buildings and pavements for a 32 acre Commercial Shopping Center on 5 to 8 feet of saturated, I lo 3 blow/foot hydraulically placed fill. To make matters more difficult, the site was in the seismically active Napa Valley. We offered 3 solutions; 2 conventional, and 1 unconventional. Our conventional solutions consisted of: 1) piers founded in the normally consolidated clay below the hydraulic fill, or, 2) over-excavation and replacement of the upper 5 to 8 feet of highly unstable soil. Our unconventional solution consisted …

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Stability Analysis Corresponding To A New Bridge Abutments, Anton Chirică, Mircea Galer Mar 1998

Stability Analysis Corresponding To A New Bridge Abutments, Anton Chirică, Mircea Galer

International Conference on Case Histories in Geotechnical Engineering

The paper refers to the foundation design of a bridge situated on active landslides in the under-carpathian zone, in the South - Eastern part of Romania. The design philosophy involves two possible sliding mass stabilisation measures: a). to develop retaining works on each brook's bank separately to the bridge foundations system; b). to design the foundations themselves so that they should be able to support the earth thrust induced by the banks instability. In order to choose the optimal solution, geological and geotechnical researches were performed. Finally, the solution of a discontinuous retaining structure located upstream the bridge abutments was …

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Steel Industry-Wastes As New Materials For Road Construction, Sudhir Mathur, Praveen Kumar, A. V. S. R. Murty Mar 1998

Steel Industry-Wastes As New Materials For Road Construction, Sudhir Mathur, Praveen Kumar, A. V. S. R. Murty

International Conference on Case Histories in Geotechnical Engineering

A large number of steel plants have been set up in India and they are producing several million tonnes of iron and steel. However, the production of iron and steel is always associated with the generation of waste materials like air cooled slag, steel slag, granulated slag and flyash etc. These materials are posing serious problems of disposal and causing environmental pollution. Road Construction is one such sector where these materials can be utilised in bulk. CRRI started a few projects sponsored by Steel Authority of India Limited (SAIL), and all these materials were tested on a big scale in …

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Capping Of An Extremely Soft Neutralised Uranium Tailings − A Case History In Environmental Geomechanics, Y. Sheng, P. Peter, Y. Wei, A. R. Milnes Mar 1998

Capping Of An Extremely Soft Neutralised Uranium Tailings − A Case History In Environmental Geomechanics, Y. Sheng, P. Peter, Y. Wei, A. R. Milnes

International Conference on Case Histories in Geotechnical Engineering

The environmental regulation for Ranger Uranium Mine, in the Northern Territory, Australia, requires the stored tailings (irrespective of where they are finally stored, whether in a tailings dam or in mined-out pits) be capped safely to minimise contamination, erosion and radon gas emission, and also to enable the site to be rehabilitated through revegetation. The hydraulically deposited neutralised tailings in the existing tailings dam have a ‘gel-like’ structure which hinders the consolidation process. Consequently, the in situ tailings have a high water content, low permeability and extremely low shear strength. The present paper describes the case history of a successful …

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Case Histories Of Two Kinds Of Composite Function − Constructing Buildings Over-Crossing Canals, Niu Zhirong, Zhou Changyong Mar 1998

Case Histories Of Two Kinds Of Composite Function − Constructing Buildings Over-Crossing Canals, Niu Zhirong, Zhou Changyong

International Conference on Case Histories in Geotechnical Engineering

Two kinds of ground treatment methods of two buildings with 6 stories over-crossing irrigation canal will be inquired in the paper. The author analyses and compares respectively the design methods, action mechanisms, construction methods and treatment effects of sand column, powder deep mixing method (PDM), and chooses the best ground treatment method from the two. Moreover, the reason why the effects of obliterating liquefaction with PDM are little is discussed in the paper.

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Effects Of Effluents Of Industrial Waste On Soil Properties (A Case Study Of Nandesari Area, Vadodara), D. L. Shah, A. V. Shroff Mar 1998

Effects Of Effluents Of Industrial Waste On Soil Properties (A Case Study Of Nandesari Area, Vadodara), D. L. Shah, A. V. Shroff

International Conference on Case Histories in Geotechnical Engineering

Around Vadodara City (Gujarat) number of chemical industries dispose of water, air and oil based pollutant everyday. The pollution process in soil due to the industrial effluent discharge on to the land and its effect on the geotechnical properties of soil arc discussed in the present case study. Uncontrolled exploitation of the natural resources have resulted in an unanticipated soil behaviour due to environmental degradation. This resulted in an increased interest in the study of environmental geotechnics which is a means of forecasting soil behaviour to the changing environment.

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The Environmental Remediation Of Clark Island − A Former Alliedsignal Inc. Site, Romeo Ciubotariu, Charles E. Schneeberger, Marie-Claude Wilson, William J. Hague Mar 1998

The Environmental Remediation Of Clark Island − A Former Alliedsignal Inc. Site, Romeo Ciubotariu, Charles E. Schneeberger, Marie-Claude Wilson, William J. Hague

International Conference on Case Histories in Geotechnical Engineering

Clark Island is a 63 ha island located in Lake St-Francis, part of the St-Lawrence River, Québec, Canada. Since the early 40s the island has been used for the production of mineral acids by its fanner owner, Allied Chemicals Limited. Acidic wastes were placed over large portions of the island. The presence of these waste materials together with contaminated soils was identified as a potential threat to the nearby river water quality as well as to the underlying bedrock groundwater quality. A major remedial investigation and feasibility study was initiated in 1987. The approved scope of the remediation project included …

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Procedure To Predict Settlement Of Solid Waste Landfills Using Power Creep Law, Sanjeev Kumar Mar 1998

Procedure To Predict Settlement Of Solid Waste Landfills Using Power Creep Law, Sanjeev Kumar

International Conference on Case Histories in Geotechnical Engineering

Settlement prediction of solid waste landfills is important for their post-closure operation. Estimation of settlement of refuse is complex because of the mechanism of settlement and heterogeneity of the refuse. Several methods are available to predict the settlement of solid waste landfills. Based on the analysis of published measured data of four landfills, a unique relationship was recently developed between reference compressibility and rate of compression to predict refuse settlement using Power Creep Law. A step-by-step procedure is proposed to predict refuse settlement by using the Power Creep Law at a site for which the data from laboratory or field …

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Regulatory, Environmental And Geotechnical Solutions To Construction Of A Roadway Embankment Over A Landfill, Victor A. Modeer, Mary C. Lamie Mar 1998

Regulatory, Environmental And Geotechnical Solutions To Construction Of A Roadway Embankment Over A Landfill, Victor A. Modeer, Mary C. Lamie

International Conference on Case Histories in Geotechnical Engineering

The new Illinois Route 143 alignment was constructed with the new Clark Bridge that crosses the Mississippi River in Alton, Illinois. The new bridge forced the Illinois Department of Transportation (IDOT) to cross the Alton Commons Landfill with a new alignment. Approximately 318 meters of embankment with fill heights ranging between 4.5 to 7.6 meters were constructed on top of the landfill. An Environmental Impairment Assessment, Preliminary Site Assessment (PSA), Phase II and Phase III investigations were completed in 1989 and 1990. Using "Brownfield" concepts, the Illinois Environmental Protection Agency (IEPA) approved the alignment construction without having to remediate the …

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Pile Foundation Construction For The Buckman Bridge Jacksonville, Florida, Raymond J. Castelli, Mohamad Hussein Mar 1998

Pile Foundation Construction For The Buckman Bridge Jacksonville, Florida, Raymond J. Castelli, Mohamad Hussein

International Conference on Case Histories in Geotechnical Engineering

This paper describes the geotechnical issues related to pile foundation construction for the widening of the 1-295 Buckman Bridge over the St. John's River in Jacksonville. Florida. The project included a total of 1351 prestressed concrete piles, with sizes up to 30-inchcs (762-mm) square and design capacities up to 205 tons (1,820 kN). The paper highlights the application of dynamic testing as a routine and essential quality control measure during construction, and presents summaries of the dynamic test data obtained. Issues addressed include increased pile capacity with time after driving, unit friction and end bearing values, hammer efficiency, driving stresses, …

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Toward Earthquake Resilient Cities In The 21st Century: Reduction Of Community Vulnerability, Walter W. Hays Mar 1998

Toward Earthquake Resilient Cities In The 21st Century: Reduction Of Community Vulnerability, Walter W. Hays

International Conference on Case Histories in Geotechnical Engineering

The focus of this paper is on earthquakes and earthquake-resilient communities in the United States. The paper describes what we have learned from the International Decade for Natural Disaster Reduction (IDNDR) and how we can build upon these experiences as we continue working toward the worldwide goal of natural-hazard-resilient cities in the 21st century.

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Case Histories Of Foundations. Paper No. Gr-I, Alan J. Lutenegger, Carole L. B. Mitchell Mar 1998

Case Histories Of Foundations. Paper No. Gr-I, Alan J. Lutenegger, Carole L. B. Mitchell

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Case Histories Of Geological, Rock And Mining Engineering Including Underground Structures And Excavations. Paper No. Gr-Vi, Christopher G. Mueller, M. Kavvadas, Baoshan Huang Mar 1998

Case Histories Of Geological, Rock And Mining Engineering Including Underground Structures And Excavations. Paper No. Gr-Vi, Christopher G. Mueller, M. Kavvadas, Baoshan Huang

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Case Histories Of Geotechnical Earthquake Engineering. Paper No. Gr-Iii, Ahmed-W. Elgamal, Marshall Lew Mar 1998

Case Histories Of Geotechnical Earthquake Engineering. Paper No. Gr-Iii, Ahmed-W. Elgamal, Marshall Lew

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Case Histories Of New Solutions To Traditional Geotechnical Problems. Paper No. Gr-Ix, Vijay K. Puri, Tom Blackburn, John M. Benson Mar 1998

Case Histories Of New Solutions To Traditional Geotechnical Problems. Paper No. Gr-Ix, Vijay K. Puri, Tom Blackburn, John M. Benson

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Case Histories Of Retaining Structures And Deep Excavations. Paper No. Gr-V, Raj V. Siddharthan, Arni E. Rafnsson Mar 1998

Case Histories Of Retaining Structures And Deep Excavations. Paper No. Gr-V, Raj V. Siddharthan, Arni E. Rafnsson

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Conference Snapshots, Multiple Participants Mar 1998

Conference Snapshots, Multiple Participants

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Safety Of Dams Modifications Of Ochoco Dam − Crooked River Project, Oregon, Brent H. Carter, Richard A. Link Mar 1998

Safety Of Dams Modifications Of Ochoco Dam − Crooked River Project, Oregon, Brent H. Carter, Richard A. Link

International Conference on Case Histories in Geotechnical Engineering

Ochoco Dam, a hydraulic fill structure, was completed in 1920 and is located just east of Prineville, Oregon. Foundation units consist of a massive landslide, talus/alluvial fan complex, alluvium, and John Day Formation. Dam embankment right-abutment seepage occurred during first filling. Upstream right-abutment treatment in 1921 reduced this seepage from an estimated 43 cfs to approximately 28 cfs. Further modifications were completed in 1950 reducing seepage to approximately 12 cfs. As part of the U.S. Bureau of Reclamation's dam safety program, geotechnical investigations were started in 1985. Following this program, erratic piezometer readings in 1989 and sinkhole development along the …

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Abnormal Wall Movements Of A Steel Silo Caused By Paddy Rice Storage, Minh Phong Luong Mar 1998

Abnormal Wall Movements Of A Steel Silo Caused By Paddy Rice Storage, Minh Phong Luong

International Conference on Case Histories in Geotechnical Engineering

The particular rheological behaviour of paddy rice and husked rice, that is readily determined in laboratory using the conventional triaxial apparatus, provided a realistic interpretation of an unusual case history occurred on a large rice storage steel silo Subsequently 11 suggested minor modifications, but quite sufficient to ensure the facility availability at different stages of rice storage.

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Experiences Of The Support Designs In The Two Large Underground Openings In India, R. K. Goel, J. L. Jethwa, A. K. Dube Mar 1998

Experiences Of The Support Designs In The Two Large Underground Openings In India, R. K. Goel, J. L. Jethwa, A. K. Dube

International Conference on Case Histories in Geotechnical Engineering

Support requirements for two caverns arc worked out by empirical and the numerical approaches. The adequacy of the shotcrete-rock bolt support system is monitored by measuring the deformations of caverns walls and roof. The measurements are compared with the results obtained from the numerical approach. Brief geology, the supports, and the results of performance monitoring are presented in the paper.

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Bs News Mar 1998

Bs News

Building Services Engineering

No abstract provided.

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Investigating Sorbent Geometry Response Surfaces From Sorption Rate Data, H. Michael Harrison Mar 1998

Investigating Sorbent Geometry Response Surfaces From Sorption Rate Data, H. Michael Harrison

Theses and Dissertations

Sorption and desorption of hydrophobic organic compounds (HOCs) into soil particles occurs at Air Force contamination sites. Long-term desorption extends clean up time, costing billions. Accurately modeling desorption will reduce costs and improve clean up designs. State of the art models depict soil as uniform spherical particles which lose the effect of longer sorption path lengths. An alternate approach, the multiple sites in series (MSS) model, describes the sorption capacity of a mixture of soil particle sizes and shapes using a composite particle defined by a two parameter statistical distribution. When the MSS model uses a general radial geometry function …

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Survey And Visual Inspection Of Keystone Block Wall And Embankment Slide At Mist Lake Plaza In Lexington, Kentucky, L. John Fleckenstein, David L. Allen Mar 1998

Survey And Visual Inspection Of Keystone Block Wall And Embankment Slide At Mist Lake Plaza In Lexington, Kentucky, L. John Fleckenstein, David L. Allen

Kentucky Transportation Center Research Report

The Kentucky Transportation Center was requested by Bhate Engineering Corporation and A.B. Shopping Center Properties, Inc. to evaluate and monitor apparent movement in the Keystone Block retaining structure and the earth embankment located next to the Walmart Department Store at Mist Lake Plaza in Lexington, Kentucky. In June 1997, a report (KTC-97-11) was submitted which summarized work that had been conducted prior to June of 1997. The initial report included results of the inspection of the surface drainage, inspection of subsurface storm water drainage, inspection of the embankment, and inspection and photo-logging of visible wall distress. In June 1997, several …

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Use Of Hydrated Lime Byproduct For Stabilization Of Subgrade Soils, Tony L. Beckham, Tommy C. Hopkins Mar 1998

Use Of Hydrated Lime Byproduct For Stabilization Of Subgrade Soils, Tony L. Beckham, Tommy C. Hopkins

Kentucky Transportation Center Research Report

In January 1998, Minteck Resources requested that the Kentucky Transportation Center at the University of Kentucky perform a feasibility study to determine if a hydrated lime byproduct produced at the Carbide/Graphite facility in Calvet City, Kentucky can be used as a substitute for hydrated lime as a soil subgrade stabilizing agent. According to personnel of Carbide/Graphite Group, Incorporated, the byproduct contains a high percentage of hydrated lime.

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Evaluations Of Wall Structures In Kentucky (Kyspr-85-107), L. John Fleckenstein, Brad W. Rister, David L. Allen Mar 1998

Evaluations Of Wall Structures In Kentucky (Kyspr-85-107), L. John Fleckenstein, Brad W. Rister, David L. Allen

Kentucky Transportation Center Research Report

Approximately 209 retaining wall structures were visually evaluated under this study for long-term performance. The inspection included concrete crib, single-barrel and double-barrel culvert wing, metal bin, Gabion, rigid concrete, Keystone block, tiedback, mechanically stabilized earth (M.S.E.), Tech Wall, and sound walls. Significant structural distress was observed in several of the wall systems. This report discusses the performance of each wall system and makes recommendations on the future use of these systems.

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Design Of Automotive Structural Components Using High Strength Sheet Steels Effect Of Strain Rate On Material Properties And The Structural Strength Of Cold-Formed Steel Members, Wei-Wen Yu Mar 1998

Design Of Automotive Structural Components Using High Strength Sheet Steels Effect Of Strain Rate On Material Properties And The Structural Strength Of Cold-Formed Steel Members, Wei-Wen Yu

CCFSS Library (1939 - present)

PREFACE The research work on automotive components conducted at the University of Missouri-Rolla under the sponsorship of the American Iron and Steel Institute began in 1982. During the first six years, studies were made on the basis of static loading. Since May 1988, studies have been concentrated on the effect of strain rate on material properties and the structural strength of cold-formed steel members along with the behavior of hybrid members. The research findings for the period from 1988 through 1997 are summarized in this report. Special thanks are expressed to General Motors Corporation (Dr M. Y. Sheh, Mr. B. …

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