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Articles 1051 - 1080 of 2055
Full-Text Articles in Engineering
The Construction Of Stations And Tunnels By Slurry Trecnch, Method In The Madrid Metro Extension, Carlos S. Oteo, Jose Mª Rodríguez Ortiz, Manuel Melis
The Construction Of Stations And Tunnels By Slurry Trecnch, Method In The Madrid Metro Extension, Carlos S. Oteo, Jose Mª Rodríguez Ortiz, Manuel Melis
International Conference on Case Histories in Geotechnical Engineering
Recently a new Extension of the Madrid Subway (Spain) is carried out (1995-2003). In 8 years more of 105 Km of tunnels are builded by several procedures: Traditional non-mechanized excavation, precast linings by E.P.B machines, cut and cover system, etc. In this paper the basic criteria adopted for the design of tunnels and stations built with the cut and cover method (reinforced concrete continuous and discontinuous walls) are analysed. Initially, to this purpose the geotechnical properties of the Madrid ground are reached, in order to establish a group of unified desion geotechnical parameters. The hypotheses made for the numerical analysis …
Piling-Induced Ground Motion: A Case Study Involving Hydrocarbon Exploitation Activities In The Niger Delta, Samuel U. Ejezie
Piling-Induced Ground Motion: A Case Study Involving Hydrocarbon Exploitation Activities In The Niger Delta, Samuel U. Ejezie
International Conference on Case Histories in Geotechnical Engineering
The damage potential of piling-induced vibrations in the humid tropical soils of southeastern Nigeria has been evaluated. The vibration propagation was characterized by a fairly high attenuation coefficient, as evidenced by a rapid decrease of velocity amplitude with distance from source. It was also observed that the bulk of the peak velocity amplitudes measured or calculated fell within the safe limit for structural safety and human tolerance. This therefore implied that the zone of highest damage probability at the case study site did not extend across property line as suspected prior to commencement of piling. In general, the findings and …
Failure Investigation Of A Fill Slope In Putrajaya, Malaysia, A. N. Hussein, A. H. Mustapha
Failure Investigation Of A Fill Slope In Putrajaya, Malaysia, A. N. Hussein, A. H. Mustapha
International Conference on Case Histories in Geotechnical Engineering
On 6th of January 2001, a fill slope collapsed in Putrajaya, Malaysia. The failed slope was 25m in height. The failure caused the slope to pushed two reinforced earth walls and the recently completed jetty and boat docking facilities to collapse. The depth of the failure scar was about 2m with a failure length of about 50m. A failure investigation was then carried out to determine the causes of failure. A total of thirteen new boreholes, fifteen Mackintosh probes and three hand augers were carried out to determine the soil profile. A desk study of existing information and records, site …
Construction Of Diaphragm Wall Support Underground Car Park In Historical Area Of Bangkok, Narong Thasnanipan, Zaw Zaw Aye, Chanchai Submaneewong
Construction Of Diaphragm Wall Support Underground Car Park In Historical Area Of Bangkok, Narong Thasnanipan, Zaw Zaw Aye, Chanchai Submaneewong
International Conference on Case Histories in Geotechnical Engineering
Geotechnical aspects in construction of diaphragm-wall-support 2 level underground car park building, located in the historically and culturally significant area of Bangkok is presented in this paper. Results of the preliminary analyses showed that the deflection of the thin diaphragm wall of 0.60 m width would be large if it was to be fully cantilevered to fulfill the architectural and utility aspects of the car park structure. It was therefore decided to use buttress to minimize the diaphragm wall deflection. Performance of buttressed-support diaphragm wall is demonstrated based on the inclinometer monitoring results. Intensive modification of construction sequence in actual …
Railway Tunnelling In Frozen Ground On Bothniabana, S. Saarelainen, L. Korkiala-Tanttu, J. Viitala
Railway Tunnelling In Frozen Ground On Bothniabana, S. Saarelainen, L. Korkiala-Tanttu, J. Viitala
International Conference on Case Histories in Geotechnical Engineering
A new railway line was under construction in North-eastern Sweden, along the shoreline of the Gulf of Bothnia. The terrain consisted of Postglacial clay and silt valleys, and ridges of Precambrian bedrock, crossing the railway line. The railway level was about 20m below the ground surface. For the design of freezing, a freezing analysis was carried out to determine the pipeline depths and distances, to estimate the necessary time for freezing and to determine temperatures within the frozen zone. To estimate the deformations, displacements and safety level, a mechanical analysis of the tunnel cross-section was carried out. As input, the …
Geotechnical Investigation And Rock Characterization For The East Side Access Project’S Manhattan Segment, Subal Sarkar, Amitabha Mukherjee, Aomar Benslimane, Carroll Stewart
Geotechnical Investigation And Rock Characterization For The East Side Access Project’S Manhattan Segment, Subal Sarkar, Amitabha Mukherjee, Aomar Benslimane, Carroll Stewart
International Conference on Case Histories in Geotechnical Engineering
The East Side Access Project to connect the Long Island Railroad to New York’s Grand Central Terminal on the east side of Manhattan will be one of the largest tunneling projects ever undertaken in New York. A series of tunnels and caverns will be excavated in rock to connect the existing 63rd Street tunnels to twin three-level caverns beneath Grand Central Terminal. The site investigation for the Manhattan Segment comprised archive searches, rock exposure mapping, geophysical surveys, test borings in soil and rock, in-situ testing, groundwater monitoring, and laboratory testing of soil, water and rock. Approximately 200 borings have been …
Effects Of Liquefaction On The Numerical Analysis Of A Single Pile-Soil Interaction During Earthquakes, Fusao Oka, Lu Chih-Wei, Zhang Feng
Effects Of Liquefaction On The Numerical Analysis Of A Single Pile-Soil Interaction During Earthquakes, Fusao Oka, Lu Chih-Wei, Zhang Feng
International Conference on Case Histories in Geotechnical Engineering
Dynamic behavior of pile-foundations during earthquakes is important for the performance of many foundations. To clarify the mechanism of the soil-pile interaction, we have conducted a series of numerical analysis of a single pile foundation in the different types of a two-layer ground. Upper layer of the ground is composed of dense sand, reclaimed soils, medium dense sand or loose sand, and the lower layer of the ground is composed of clayey soils. In the liquefaction analysis, we have used a fully coupled effective stress analysis method with the cyclic elasto-plastic and elasto-viscoplastic constitutive models for sandy soils and clays. …
Crosshole Sonic Logging Integrity Testing For The New Cooper River Bridge, Edward L. Hajduk, Marvin R. Tallent, Donovan L. Ledford, William R. Christopher
Crosshole Sonic Logging Integrity Testing For The New Cooper River Bridge, Edward L. Hajduk, Marvin R. Tallent, Donovan L. Ledford, William R. Christopher
International Conference on Case Histories in Geotechnical Engineering
A new cable-stayed bridge for US Highway 17 is currently under construction over the Cooper River between Mount Pleasant and Charleston, South Carolina. This new bridge will replace two existing structures, the Silas Pearlman and the Grace Memorial Bridges. When completed, the new bridge will have a 1,546 feet span over the Cooper River, making this bridge the longest cable-stayed span in North America. The foundations for this replacement bridge are drilled shafts embedded within the Cooper Marl formation, which underlies the near surface lower coastal plain soil deposits. Depending on the location within the bridge structure, the drilled shafts …
A Half Century Of Tapered-Pile Usage At The John F. Kennedy International Airport, John S. Horvath, Thomas Trochalides
A Half Century Of Tapered-Pile Usage At The John F. Kennedy International Airport, John S. Horvath, Thomas Trochalides
International Conference on Case Histories in Geotechnical Engineering
Tapered driven piles have been the deep foundation of choice ever since construction of and at the well-known John F. Kennedy International Airport (JFKIA) in New York City began in the late 1940s. Timber piles were used primarily for many decades but various brands of closed-end steel pipe piles have become preferred in recent years as engineers have sought ever-increasing allowable axial-compressive loads per pile. With currently available pile types it is now possible to routinely install tapered piles that have an allowable axial-compressive service-load capacity per pile in excess of 400 kips (1780 kN), with net ultimate axial-compressive geotechnical …
Prelimary Geotechnical Engineering Observations Of The Tecomán, Mexico Earthquake Of January 21, 2003, Joseph Wartman, Adrian Rodriguez-Marek, David Keefer, Scott Deaton, Pedro Repetto, Emir Jose Macari
Prelimary Geotechnical Engineering Observations Of The Tecomán, Mexico Earthquake Of January 21, 2003, Joseph Wartman, Adrian Rodriguez-Marek, David Keefer, Scott Deaton, Pedro Repetto, Emir Jose Macari
International Conference on Case Histories in Geotechnical Engineering
The 21 January 2003 Mw 7.6 Tecomán, Mexico Earthquake caused significant damage to the coastal region of the state of Colima, Mexico. This paper presents an overview of observations made by the United States National Science Foundation (NSF)-sponsored geotechnical engineering reconnaissance team, which visited the affected region one week following the earthquake. The team visited and documented sites including major cities, industrial facilities, and transportation routes. There were a number of important geotechnical engineering features of the earthquake. Liquefaction and consequent strength loss, ground settlement, and lateral spreading, alone or in combination, damaged the Port of Manzanillo, the capital …
Past Proceedings: 1st International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors
Past Proceedings: 1st International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Fourth International Conferences On Recent Advances On In Geotechnical Earthquake Engineering And Soil Dynamics, Multiple Authors
Fourth International Conferences On Recent Advances On In Geotechnical Earthquake Engineering And Soil Dynamics, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
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.
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 …