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Evaluation Of Full-Depth Asphaltic Concrete Pavements, Herbert F. Southgate, Gary W. Sharpe, Mark Anderson, Robert C. Deen

Kentucky Transportation Center Research Report

This study was initiated to verify a newly-developed set of design curves for full-depth asphaltic concrete pavements. Quality control during construction was checked using nuclear density testers, Benkelman beams, and a Road Rater. During the course of this study, an analysis system was developed to interpret the dynamic deflections as measured by the Road Rater and was confirmed by elastic theory. The thickness design curves were verified within the accuracy of construction variations.

Rut depths measured in 1979 were analyzed in terms of potential rut depth resulting from consolidation under traffic due to lack of obtaining 100-percent of Marshall density …

The Dynamics Of The Columbia River Estuarine Ecosystem: Volume I And Volume Ii, Creddp, Charles A. Simenstad, David A. Jay, C. David Mcintire, Willa Nehlsen, Christopher R. Sherwood, Lawrence F. Small

Civil and Environmental Engineering Faculty Publications and Presentations

Integrates results from the CREDDP studies into a comprehensive synthesis. Includes physical setting and processes; relationships between physical and biological processes and among functional groups of organisms; species, biomass and productivity per habitat type per region. Approximately 360 pages per volume.

Behavior Of Thin-Walled Channel Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Subash Yalamarthy

Theses

Next to rectangular, circular and L shapes, Channel section may be the most frequently encountered reinforced concrete columns since they can be used as box wall for elevators. Nevertheless, information about the load deformation behavior is not generally available to structural engineers. Most of the investigations have been emphasized on the ultimate strength of column sections under combined biaxial bending and axial compression and the resulting interaction surface. No attention is paid to load deformation behavior.

Current code provisions do not provide adequate guidelines for assessing the strength and ductility of biaxially-loaded reinforced concrete columns. Therefore, this investigation is aimed …

Behavior Of Tee-Shaped Reinforced Concrete Columns Subjected To Biaxial Bending And Axial Compression, Antoun Romanos Nader

Theses

The investigation deals with the effect of eccentric loading on the moment-curvature relationship of reinforced concrete tee columns.

The test program consisted of two series of tee-shaped reinforced concrete columns, loaded biaxially at constant angle from the principle axes. Their end conditions were assumed to be pinned-ended.

Loads, at constant rate, were gradually applied until failure. At each loading stage, measurements were made for the strains and deflections at the mid span section.

The experimental and theoretical results of the load- deformation and moment-curvature were compared and found that the analytical approach proposed by Hsu is applicable to irregular sections …

Volatile Organic Pollutant Levels In Indoor Environments From The Use Of Kerosene Heaters, Kashinath Banerjee

Theses

The indoor air pollutant levels caused by use of kerosene stoves as sources of heat in residences is of increasing concern as the use of such heaters becomes more widespread. Emission of volatile organic. species (aliphatic hydrocarbons from hexane to dodecane, cyclohexane and aromatic species including benzene, toluene, ethyl benzene, m/p xylenes, o-xylene and styrene) from these devices were measured at different sites. The organic vapor samples have been collected by adsorption on Tenax GC, and quantitatively analyzed by thermal desorption into a high Resolution capillary column gas chromatograph. Mass spectral analysis was also conducted for qualitative identification of sample …

Behavior Of L-Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Amar Shah

Theses

Combined biaxial and axial compression for L-shaped reinforced concrete short columns is a common design Problem. Current code, provisions and the available design aids do not offer an insight into the determination of strength and ductility of biaxially loaded reinforced concrete column. An experimental and analytical investigation of the moment-deformation behavior of biaxially loaded L-shaped short columns were undertaken. Four 1/2 scaled specimens were tested till failure. Moment-curvature and load-deflection curves were developed from the experimental and the analytical results. The analytical results were obtained using a computer program developed by Hsu (1). From the investigation it is deduced that …

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.

Design And Performance Of Horizontal Drains, J. H. Kleppe, G. M. Denby

International Conference on Case Histories in Geotechnical Engineering

The paper presents a comparison of field and analytical data regarding the performance of horizontal drains installed to stabilize a landslide. Results of the comparison provide generalized guidelines with which to design drain spacing, length and position. The most significant conclusions are, firstly, that horizontal drains were able to successfully depressurize a silty fine sand with up to 60% silt; secondly, that the ultimate drawdown that can be achieved by slotted horizontal drains in fine-grained soils is controlled primarily by the elevation of the drain; and thirdly; that the design drain spacing is dependent primarily on the initial drawdown response …

A Comparison Of Methods Of Estimating The Attenuation Of Earthquake Strong Ground Motion, O. W. Nuttli, R. B. Herrmann

International Conference on Case Histories in Geotechnical Engineering

Strong ground-motion attenuation relations take on a variety of forms, depending upon the parameters used to express the relations and upon the geographic area for which the equations are developed. In general the strong ground-motion parameters, namely acceleration, velocity, displacement and response spectra ordinates, are taken to be proportional to the distance from the earthquake source to the site, to the magnitude or some measure of the strength of the earthquake source, and to loss factors resulting from transmission of energy through the inelastic earth. In certain areas of the world, where strong-motion data are abundant, empirical relations can be …

Behavior Of Some Earth Dams On Liquefiable Soil, A. Popovici, V. Perlea, L. Corda

International Conference on Case Histories in Geotechnical Engineering

The 1977 March 4 Vrancea earthquake emphasized several zones with liquefiable materials on Romanian territory. Some earth dams of such zones, placed to over 200 km from the earthquake epicenter were damaged. Important hydropower works are at present in different design or construction stages in such area, comprising long earth dams. The Seismic analysis procedure applied to their design was based on the finite element method. Some characteristic cross - sections of the earth dams in different versions have been studied. The analysed sections had different shapes (with and without stabilizing benches downstream) and included different zoning of the materials …

Vibration Studies Of Block Type Machine Foundations, S. K. Guha

International Conference on Case Histories in Geotechnical Engineering

Detailed vibration measurements were undertaken at eight block type machine foundations with different supporting soil conditions. These extensive measurements were supplemented by theoretical vibration calculations using principally Barkan's method but, at times, using methods of Reissner, Pauw, Richart and Ford and Haddow. The results of prototype experiments and theoretical studies on various compressor foundations described above as also on similar foundations in the country justify broadly the validity of various theories, particularly Barkan’s method, though these are based on somewhat different concepts. Design criteria for foundations are generally described in terms of limiting values of amplitudes of displacement at the …

Efficacy Of Grout Curtain At Ramganga Dam, M. C. Goel, B. N. Sharma

International Conference on Case Histories in Geotechnical Engineering

The analysis of foundation piezometer records at main dam and saddle dam of Ramganga Project, has indicated that the single row grout curtain at main dam, is ineffective so far as the hydrostatic pressure reduction in foundation is concerned, whereas under similar conditions, upstream impervious blanket at saddle dam, is more effective in pressure reduction. Experimental test results by electrical analogy technique using graphite paper, has indicated that in case of Ramganga main dam, the total net pressure reduction for fully effective grout curtain would have been only 25%. The design curve for efficiency versus different openings in grout curtain …

Dynamic Response And Static Analysis Of Rcc Space Frames Supporting High Speed Centrifugal Machines With Coupled Soil-Structure Interaction, Dilip K. Chakravorty, Dhiman K. Ghosh, H. N. Batavyal

International Conference on Case Histories in Geotechnical Engineering

The paper reviews the current state of the art on the dynamic and static analyses of RCC space frames supporting high speed centrifugal machines e.g. large turbogenerators and compressors. The need to include the effects of soil-structure interaction formulations on overall behaviour of various analytical models are highlighted, At the same time, the uncertainties involved in evaluating essential geotechnical parameters and paucity of reliable and elaborate information from the machine manufacturers are discussed. The analysis and design aspects of this inter-disciplinary problem are illustrated with two typical design case studies selected from authors’ own experience in this specialised field. The …

Foundation-Bearing-Rotor Interaction Problem In Controlling Vibrations In A 120 Mw Turbo Generator, Krishen Kumar, Shamsher Prakash

International Conference on Case Histories in Geotechnical Engineering

A two-pole turbogenerator posed problem of resonance and excessive vibrations at the operating speed during test runs in the Test-bed. The entire system comprising the foundation, pedestals supporting the generator, journal bearing seats, bearing oil-film, and the rotor has been modeled and analysed for computing the rotor's critical speeds as also the foundation's natural frequencies. Some of the system's parameters have been derived from actual tests. Sensitivity analysis for the rotor's critical speed that coincided with the operating speed of machine showed that this critical speed is relatively insensitive to the foundation mass as well as stiffness, and largely depends …

General Report For Theme Six – Case Histories In Machine Foundations, Richard D. Woods

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Shale Pit Slopes - A Case History, D. H. Shields

International Conference on Case Histories in Geotechnical Engineering

The preliminary design for 180 metre high open pit mine slopes in shale is described. Given the complex geology and material properties, the first choice would have been to use reliability theory. The state-of-the-art of probabilistic methods in geotechnical engineering precludes this, and a deterministic approach to design was resorted to instead.

Behavior Of Two Big Rockfill Dams, And Design Aims, V. F. B. De Mello

International Conference on Case Histories in Geotechnical Engineering

The case histories of two major compacted embankment dams are analysed with regard to the problem most amenable to reasonings and computations of statistics of averages, the problem of deformations, discussed regarding specific laboratory testing compared with use of generalized correlations. Improved mental models for predictions are proposed. In the earthcore-compacted rockfill section the problem of crest cracking suggests the interest in a significant change of zoned section in the topmost stretch. For the concrete-face rockfill dam it is suggested that one needs a significant revision of instrumentation and monitoring orientation. Both dams behaved extraordinarily well on questions of consequence …

General Report A For Theme Nine – Case Histories In Subsidence Of Soils, Tunnels And Shafts In Soft Ground, Waste Disposal Sites And Pavements, Hal Aldrich

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

General Report B For Theme Nine – Geotechnical History Of Projects Other Than Presented In Sessions 1-8, Charles Mansur

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Pretreatment Of A Soft Soil By Surcharging - A Case History, D. Lakner, I. K. Lee, E. Armstrong, O. G. Ingles

International Conference on Case Histories in Geotechnical Engineering

A normally consolidated silty clay deposit, varying in depth from 0 to 15 m, was pretreated by surcharging combined with P.V.C. vertical drains. Representative field values of the vertical coefficients of primary (0.0015 m²/kN) and secondary consolidation (0.01) were calculated from the settlements caused by a preliminary fill placed some six years prior to the detailed geotechnical studies. A conservative representative field value of the horizontal coefficient of primary consolidation was established to be 8 m²/year. Asaoka's method was used to predict future settlements due to both primary and secondary consolidation. The vertical drains were installed …

Deformation Of Slopes Of Two Excavations In Soft Clays, C. W. Sheng

International Conference on Case Histories in Geotechnical Engineering

Observed results concerning the movements of excavated slopes during and after excavation for two drydocks with different construction sequence have been described. FEM analysis has been conducted and discussed. The effect of heavy rains on the stability of slope improved by wellpoints has been presented.

Foundation Heave At Asco Ii Nuclear Power Plant, R. B. Fallgren, C. R. Mcclure

International Conference on Case Histories in Geotechnical Engineering

Excavation of 75m of claystone at Asco Unit II resulted in foundation heave in excess of anticipated elastic rebound. The heave was found to be caused by expansive clay minerals in the rock swelling in the presence of water. Upper-bound estimates of future heave were made based on past trends, and structures analyzed to demonstrate their capacity to resist heave-caused deformations. The primary factor in controlling heave is the amount of water available to the bedrock.

An Embankment On Soft Clays With Sand Drains Numerical Characterization Of The Parameters From In-Situ Measurements, A. Cancelli, A. Cividini

International Conference on Case Histories in Geotechnical Engineering

The deformation parameters of a soft lacustrine deposit, with vertical sand drains, are evaluated by means of field measurements obtained during and after the construction of a railway embankment. The geotechnical system, modelled as linearly elastic and in plane strain, is analyzed by means of the finite element method and the estimation problem is solved adopting a Bayesian approach. The experimental data, the "a priori" estimation of the parameters and their uncertainties are considered in the back-analysis. The results provide the "optimal" values of the parameters, a measure of their uncertainties and, consequently, an index of the effectiveness of the …

Circulatory Processes In The Columbia River Estuary, David A. Jay

Civil and Environmental Engineering Faculty Publications and Presentations

Covers tidal circulation, density distribution, vertical mixing, salt transport, and low-frequency flow processes, with contributions to estuarine circulation theory.

Pullout Resistance Of Welded Wire Mats Embedded In Soil, Mark R. Nielsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Welded wire mesh has been used in the past as soil reinforcement in the construction of reinforced soil embankments. Involved in the design of these embankments is the external and internal stability. The internal stability has two failure mechanisms; tension failure and pullout failure of the welded wire mesh.

This paper presents the results of laboratory tests on different sizes of welded wire mats embedded in different types of soils. These tests were performed on mats that are much larger than in previous tests. These tests measured the pullout resistance as a function of the number of embedded wires, the …

Fundy Tidal Power Development : Preliminary Evaluation Of Its Environmental Consequences To The Resources Of The State Of Maine, Bigelow Laboratory For Ocean Sciences

Maine Collection

Fundy Tidal Power Development : Preliminary Evaluation of Its Environmental Consequences to the Resources of the State of Maine

A Report to the Maine State Planning Office by the Bigelow Laboratory for Ocean Sciences, April, 1984.

"Technical Report No. 35 - Bigelow Laboratory for Ocean Sciences, West Boothbay Harbor, Maine - A Division of Northeastern Research Foundation, Inc."

Contents: Executive Summary / Introduction / Methods / Physical and Biological Consequences / Socio-Economic Consequences / Research Needs / Bibliography / Appendix I. Written Comments on Greenberg Model

Application Of An Optimization Technique To The Chattanooga Area Regional Transportation Authority (Carta) Bus System, Fernando R. Chacon

Masters Theses and Doctoral Dissertations

The purpose of this project is to apply a mathematical model and optimization techniqu,e to the Chattanooga Area Regional Transportation Authority (CARTA).A survey of recent urban tranaportation models was completed and the model demand most specific and applicable was chosen.A computer technique of sensitivity analysis was used in order to complete the model . A comparison of the analytical results with the current bus system was made. The results obtained in this project provide a framework in which CARTA may plan for more efficient operations.

Soft-Op User Manual For Microcomputer Aided Process Control Of The Oxidation Ditch Facility, Drew D. Mcintyre

Reports

This manual is intended to be used in conjunction with the program SOFT-OP. SOFT-OP was developed at the Division of Environmental Engineering, Utah State University, Logan, Utah. Funding for the program development was supplied by Tremonton City Corporation, Tremonton, Utah. Foreword: SOFT-OP has been developed for use by operators of oxidation ditch wastewater treatment plants (extended aeration activated sludge). The program serves as a useful took in daily plant operation by assisting the operator in various tasks related to process control. These tasks are grouped within the following three classifications: 1. Implementation of control parameters 2. Analysis of process characteristics …

Rutting, A Case Study (Us 23, 1.5 Miles North Of Louisa), James H. Havens, Gary W. Sharpe, David L. Allen, Herbert F. Southgate

Kentucky Transportation Center Research Report

This case study of rutting in an asphaltic concrete pavement makes recourse to trenching full width and full depth to expose and observe the entire cross section of the structure. Rutting occurred in the vicinity of Station 59+00 on US 23, 1.5 miles north of Louisa, during August and September 1983 when traffic was diverted onto newly constructed northbound lanes (without final surface and shouldering) while excavation into the hillside was completed for the southbound lanes. Earth movers crossed the northbound lanes going to and from a waste area. Coal trucks (Figures 1 and 2) slowed, stopped, and crept where …

Development Of A Method For Establishing Resurfacing Priorities For The Pavement Management In Indiana: Volume 1, Executive Summary, Benjamin Colucci-Rios, Kumares C. Sinha, Eldon J. Yoder

JTRP Technical Reports

No abstract provided.