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Articles 2761 - 2790 of 4583
Full-Text Articles in Engineering
Keynote Lecture: Recent Studies On Liquefaction Resistance Of Sand-Effect Of Saturation, K. Ishihara, H. Tsuchiya, Y. Huang, K. Kamada
Keynote Lecture: Recent Studies On Liquefaction Resistance Of Sand-Effect Of Saturation, K. Ishihara, H. Tsuchiya, Y. Huang, K. Kamada
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The problem of sandy soils as to how they behave when they contain air or gas has been recently addressed in relation to evaluation of cyclic resistance during earthquakes. In order to shed some light on this issue, some laboratory tests were conducted on sand samples prepared in the triaxial test apparatus. The outcome of the tests disclosed that the degree of imperfect saturation can be quantified by way of the propagation velocity Vp of compressional wave or P-wave and that the cyclic resistance exhibits significant increase if the velocity Vp drops below 700 m/sec, a value smaller than the …
Past Proceedings: Fourth International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics, San Diego (2001), Multiple Authors
Past Proceedings: Fourth International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics, San Diego (2001), Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Performance Comparison Of A Roundabout Versus Two-Way Stop Controlled (Twsc) Intersections, Deogratias Eustace
Performance Comparison Of A Roundabout Versus Two-Way Stop Controlled (Twsc) Intersections, Deogratias Eustace
Civil and Environmental Engineering and Engineering Mechanics Faculty Publications
The superior safety record of modern roundabouts is well known in Western Europe, Australia and in most British-influenced countries around the world. The experience from a single modern roundabout installed in the City of Manhattan, Kansas, some three years ago, also shares the same experience. A major study of the performance of Manhattan, Kansas, modern roundabout was conducted at Kansas State University (KSU) and was co-sponsored by Mac-Blackwell National Rural Transportation Study Center, Kansas State University, and the City of Manhattan. The study examined three intersections, one modern roundabout and two Two-Way Stop Controlled (TWSC) intersections with similar traffic conditions. …
Fast Algorithm For Generating Sorted Contour Strings, Norman L. Jones, Michael J. Kennard, Alan K. Zundel
Fast Algorithm For Generating Sorted Contour Strings, Norman L. Jones, Michael J. Kennard, Alan K. Zundel
Faculty Publications
Automatic generation of contours for graphical display and map plotting has been studied extensively since the early days of computing. The individual segments making up a contour line are often determined by subdividing the object of interest into small triangles and computing the contours assuming a linear variation on each triangle. However, efficient storage of contour data and the need to place labels (automatically) or to smooth the contours require that the contours be generated in continuous strings of segments. A simple approach to generate such strings is to sort the randomly generated contour segments. Since sorting can be time-consuming, …
Application Of Vibrational Techniques In Determination Of Dynamic Properties Of Agricultural Products-State Of The Arton Of Vibrational Techniques In Determination Of Dynamic Properties Of Agricultural Products-State Of The Art, Silas Kajuna
Tanzania Journal of Engineering and Technology (TJET)
Vibration is one of the techniques employed in the determination of dynamic properties of fruits and vegetables. It entails generation of a mechanical or acoustic vibrational signal which is propagated through the flesh of the agricultural material. A transducer is either attached or held close to the specimen to monitor the propagation of the signal through the specimen. The manner in which the signal is transmitted through the material is analyzed, and the dynamic properties of the specimen which relate to its firmness or its internal being are derived. The technique has been around for the past 30 years or …
Disclaimer And Acknowledgments, University Of Missouri - Rolla
Disclaimer And Acknowledgments, University Of Missouri - Rolla
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Fourth International Conference On Case Histories In Geotechnical Engineering, St. Louis (1998), Multiple Authors
Past Proceedings: Fourth International Conference On Case Histories In Geotechnical Engineering, St. Louis (1998), Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Meet The Speakers, Multiple People
Meet The Speakers, Multiple People
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface, Shamsher Prakash
Preface, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Fourth International Conference On Case Histories In Geotechnical Engineering, Multiple Authors
Fourth International Conference On Case Histories In Geotechnical Engineering, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Authors Index, Multiple Authors
Authors Index, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Meet Our Authors, Multiple Authors
Meet Our Authors, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Organizing Committee, Multiple Members
Organizing Committee, Multiple Members
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Exhibitors, Multiple People
Exhibitors, Multiple People
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Participant List, Multiple Participants
Participant List, Multiple Participants
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors
Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
List Of Sessions, Multiple Authors
List Of Sessions, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Estimating Post-Liquefaction Displacements In Embankment Dams And Priorities Remediation Measures, W. D. Liam Finn
Estimating Post-Liquefaction Displacements In Embankment Dams And Priorities Remediation Measures, W. D. Liam Finn
International Conference on Case Histories in Geotechnical Engineering
Large displacement analysis is used to simulate the failures of flood protection dikes in Hokkaido, Japan, which occurred during the 1993 Kushiro-oki earthquake. These studies served to validate the method of analysis. The analysis was then used to predict displacements in dikes with potential for liquefaction by relating displacements to geometric characteristics of the dikes: height, slopes, and thickness of potentially liquefiable layer. The predictions were verified using dike displacement data from the Nansei-oki earthquake of 1994. The basis for reliable post-liquefaction analysis is a good estimate of the residual strength of the liquefied soils. For this reason, recent developments …
Foundation Design And Performance Of The World's Tallest Building, Petronas Towers, Clyde N. Baker Jr., Elliott Drumright, Leonard M. Joseph, Ir. Tarique Azam
Foundation Design And Performance Of The World's Tallest Building, Petronas Towers, Clyde N. Baker Jr., Elliott Drumright, Leonard M. Joseph, Ir. Tarique Azam
International Conference on Case Histories in Geotechnical Engineering
The analysis and design of foundations for the World's Tallest Building are described. The results of the exploration and in-situ testing program required to define the foundation support conditions are presented. The Towers are supported on a mat foundation on barrettes in residual soil and weathered silt stone, sandstone formation overlying karstic limestone at depths ranging from 80 to more than 200 meters. The extensive grouting program required to fill major cavities in the limestone beneath the Tower mats is described. The settlement analysis performed utilizing modulus information developed from the in-situ testing program is outlined. Barrette lengths were varied …
O-Cell Testings Case Histories Demonstrate The Importance Of Bored Pile (Drilled Shaft) Construction Technique, John H. Schmertmann, John A. Hayes, Thomas Molnit, Lorj O. Osterberg
O-Cell Testings Case Histories Demonstrate The Importance Of Bored Pile (Drilled Shaft) Construction Technique, John H. Schmertmann, John A. Hayes, Thomas Molnit, Lorj O. Osterberg
International Conference on Case Histories in Geotechnical Engineering
Herein we review the Osterberg Cell, or O-cell, method for performing large capacity load tests on bored piles (drilled shafts), and demonstrate how it provides a new opportunity to assess the effects of construction technique. A sampling of 8 case histories, 7 with comparative testing, illustrates the impact of poor technique and thus demonstrates the importance of good construction technique. The poor techniques include inadequate bottom cleanout, failure to use drilling fluids, poor concrete placement, failure to roughen sides, and improper drilling tools. We conclude with a brief description of a recent, world record, 133 MN (15,000 tons) O-cell load …
A Recent Difficult Foundation Problem: The Case Of The New Tagus Bridge, Pedro Simão Sêco E Pinto, Ricardo Oliveira
A Recent Difficult Foundation Problem: The Case Of The New Tagus Bridge, Pedro Simão Sêco E Pinto, Ricardo Oliveira
International Conference on Case Histories in Geotechnical Engineering
A brief description of the New Tagus Bridge is presented. The main site geological conditions and the field and laboratory tests are described. The seismic studies related to the design spectra, the liquefaction potential assessment and the seismic pile analysis are presented. The pile load tests (both static and dynamic) carried out on trial piles are described. The objectives of reception tests for piles and monitoring during the construction phase and the long term are presented.
Recent Experiences Of Tunneling And Deep Excavations In London, R. J. Mair
Recent Experiences Of Tunneling And Deep Excavations In London, R. J. Mair
International Conference on Case Histories in Geotechnical Engineering
The paper focuses on recent developments in tunnelling and deep excavations in London and it draws on the experiences of the Jubilee Line Extension project which has just been completed. A brief historical review is given of the first tunnels and deep excavations undertaken in London some 150 years ago. Construction methods recently used for bored tunnelling include sprayed concrete linings and closed face pressurised tunnelling machines. Ground movements observed for these various tunnelling operations and for deep excavations are reviewed, and their effects on buildings are discussed. The most extensive protective measure used on the Jubilee Line Extension to …
Risk And Reliability In Geotechnical Engineering, Suzanne Lacasse, Farrokh Nadim
Risk And Reliability In Geotechnical Engineering, Suzanne Lacasse, Farrokh Nadim
International Conference on Case Histories in Geotechnical Engineering
Statistics, reliability analyses and risk estimates can be very useful decision-making tools in geotechnical problems. Yet the methods are little used in practice. The offshore and mining industry are at the forefront for the use of these approaches, having encouraged their use and sponsored research that has enabled the methods to be well-documented and of proven usefulness in the study of alternatives for design and decision-making in face of uncertainties. The paper presents a few case studies in different areas of geotechnical engineering and discusses the results that would have been obtained without the use of the risk approach. Special …
Seismic Design Of Cellular Cofferdams, R. Scott Steedman
Seismic Design Of Cellular Cofferdams, R. Scott Steedman
International Conference on Case Histories in Geotechnical Engineering
Sheet pile cellular cofferdams (retaining walls) are robust structures, capable of withstanding significant deformation without collapse. Traditionally their use in the construction process has been associated with temporary works, but increasingly there is a demand to make use of this type of structure as part of the permanent works. However, although the design of cofferdams to resist static loads is relatively well documented, there are few examples in the literature of design approaches for seismic conditions. This paper describes the seismic design process for cellular cofferdams, drawing upon case histories in the US, CK and Japan. Comparisons are made with …
State Of The Art Of Soil Improvements With Case Histories, Joseph P. Welsh
State Of The Art Of Soil Improvements With Case Histories, Joseph P. Welsh
International Conference on Case Histories in Geotechnical Engineering
Soil improvement techniques for geotechnical construction can be broadly classified as densification, reinforcement, adhesion and excavation/replacement. This paper presents an overview of selected soil improvement techniques, with significant case histories. The soil improvement techniques discussed include Vibro-Compaction, Vibro-Replacement (stone columns), Dynamic Deep Compaction, compaction grouting, chemical grouting, jet grouting and soil fracture grouting.
Axial Load Capacity Of Piles In Sand, Roy E. Olson, Magued G. Iskander
Axial Load Capacity Of Piles In Sand, Roy E. Olson, Magued G. Iskander
International Conference on Case Histories in Geotechnical Engineering
The axial load capacity of individual piles in cohesionless soils can be estimated at design time using a variety of methods. Because of the difficulties in modeling the process of pile driving, set-up, and loading of piles, useful methods are based on case histories a load tests. Perhaps the most common approach in current use is to specify a soil/pile friction angle, an earth pressure coefficient, a tip bearing capacity factor, and appropriate limits on side shear and end bearing. The various parameters may be made functions of soil classification, relative density, depth, or whatever other variables the investigator thinks …
Bearing Capacity Of Footings On Compacted Sand, Alan J. Lutenegger, Michael T. Adams
Bearing Capacity Of Footings On Compacted Sand, Alan J. Lutenegger, Michael T. Adams
International Conference on Case Histories in Geotechnical Engineering
This paper presents the results of footing load tests conducted on compacted sand beds to evaluate the bearing capacity and load-displacement characteristics of shallow foundations. Tests were conducted on square concrete footings with widths of 0.30, 0.61, 0.91, and 1.22 m and with embedment ratios (D/B) of 0, 0.5, and 1.0 to investigate the influence of footing size and embedment on the load-displacement behavior and ultimate bearing capacity. A description of the soil and test procedures used is given and the results of the footing load tests are presented. A discussion of the definition of ultimate bearing capacity and the …
A Case Study On Expansive Soils And Rocks Of Al-Khod In Northern Oman, Amer A. Al-Rawas, Mohammed Qarnaruddin
A Case Study On Expansive Soils And Rocks Of Al-Khod In Northern Oman, Amer A. Al-Rawas, Mohammed Qarnaruddin
International Conference on Case Histories in Geotechnical Engineering
A case study of damage due to expansive soils and rocks in Northern Oman has been studied. Geological and geotechnical investigation revealed the presence of very stiff to hard silty clay with mudstone. Swell pressures up to 330 kPa, and swell percent values up to 70 were measured. Smectite (montmorillonite) and illite clay minerals were identified as being the main clay minerals present in the soils and rocks. A detailed investigation into the damage to the different building elements has been undertaken to study the mechanism of structural damage to establish the cause of such damage and to recommend the …
A Case Study On Settlement Of Oil Storage Tank Foundations, G. Ramasamy, G. Kalaiselvan
A Case Study On Settlement Of Oil Storage Tank Foundations, G. Ramasamy, G. Kalaiselvan
International Conference on Case Histories in Geotechnical Engineering
Foundations of 8 Steel Oil storage tanks and two fire water tanks were proportioned limiting total settlement to 100 mm. The soil at the site consists of alternating layers of cohesive and cohesionless soils. Settlement estimates were based on currently available methods with suitable modifications to the situation met with. The tanks were load tested (Hydrotest) and settlements observed at nine locations along the periphery on tank shell base. These observed settlements are compared with the estimated values.