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Articles 1021 - 1050 of 2055
Full-Text Articles in Engineering
Micropile Foundations In Karst: Static And Dynamic Testing Variability, Jesús Gómez, Allen Cadden, O. Christopher Webster
Micropile Foundations In Karst: Static And Dynamic Testing Variability, Jesús Gómez, Allen Cadden, O. Christopher Webster
International Conference on Case Histories in Geotechnical Engineering
Development of a major industrial facility required support of large loads from machine foundations. The site was underlain by highly variable karstic limestone conditions, which resulted in irregular depths to rock, very soft residual soil layers, and potential for voids in the rock and soil matrix. Foundation mats on micropiles were selected for support of the machines. The benefits associated with the micropiles were the speed of installation, and relative cost and schedule savings. Two load tests were performed before the start of micropile installation. One of these tests failed prematurely. A third test, performed during the initial stages of …
Injection Consolidation Under The Piers Of The Railway Bridges For The Rehabilitation Of Line Merano-Malles, Mario Volante, Elisabetta Scattolini, Enrico Maria Pizzarotti
Injection Consolidation Under The Piers Of The Railway Bridges For The Rehabilitation Of Line Merano-Malles, Mario Volante, Elisabetta Scattolini, Enrico Maria Pizzarotti
International Conference on Case Histories in Geotechnical Engineering
Newdesign loads onMerano-Malles Railways Line required structural and ground improvement along the whole line and particularly on a couple of XIX century masonry arch bridges near Silandro village, N-E Italy, South Tyrol region. The need tominimize downward-settlements during ground improvement operation, alongwith the target to create a controlled upward liftup of treated footings, brought our design choice toward an extremely delicate and totally monitored Multistage-Multiport Low Pressure Grouting solution, based on Manchettes - pipe technique. A Successful Design concept, Grouting details, Monitoring results are presented in this paper.
Case History: Foundation Evaluation For The Virginia Highway 288 Project, Emad Farouz, Paul Landers, Scott Webster
Case History: Foundation Evaluation For The Virginia Highway 288 Project, Emad Farouz, Paul Landers, Scott Webster
International Conference on Case Histories in Geotechnical Engineering
For the first time in Virginia highway construction history, a consortium of contractors, engineers, and designers proposed an expansion of the VA-288 highway around the fast-growing western half of Richmond. The design-build project was approved in December 2000 and construction began April 2001. The project includes constructing approximately 17 miles of new highway with 23 bridges and overpasses. The fast-track, design-build process requires that bridge design and construction be carefully evaluated to determine the most cost-effective approach. Figure 1 presents the Site Location Map. In keeping with the design-build process, the bridge foundations were varied depending upon the crossing’s length …
Quality Control Of Cement Deep Soil Mixing Work For The Port Of Oakland Projects, David S. Yang, Christopher J. Coutu, Larry L. Scheibel
Quality Control Of Cement Deep Soil Mixing Work For The Port Of Oakland Projects, David S. Yang, Christopher J. Coutu, Larry L. Scheibel
International Conference on Case Histories in Geotechnical Engineering
The Cement Deep Soil Mixing (CDSM) method is an in situ soil treatment technology that introduces and mixes cementitious materials with native soils using hollow-stem rotating shafts equipped with a cutting tool at the tip and mixing paddles above the tip. The successful use of the soil-cement produced by CDSM relies on the selection of acceptance criteria and construction quality control during the in situ soil mixing process. Two CDSM projects for the Port of Oakland are used as case examples to present the acceptance criteria set and the execution of the quality control program for the soil mixing work. …
Site-Specific Earthquake Ground Motions For The 12th Street And 14th Street Viaducts On Route 139 In Jersey City, New Jersey, Aly M. Mohammad, Anthony S. Crincoli
Site-Specific Earthquake Ground Motions For The 12th Street And 14th Street Viaducts On Route 139 In Jersey City, New Jersey, Aly M. Mohammad, Anthony S. Crincoli
International Conference on Case Histories in Geotechnical Engineering
The 12th and 14th Street Viaducts, which carry Route 139, are located west of the Holland Tunnel in Jersey City, New Jersey. The two viaducts, supported on pile foundations, provide access to and from the Holland Tunnel (which connects New York City and New Jersey) and are considered critical structures. The New Jersey Department of Transportation (NJDOT) has selected DMJM+HARRIS to perform design services including rehabilitation and seismic retrofit for the 12th Street and 14th Street Viaducts. The subsurface conditions play a major role in evaluating the structures behavior under a seismic event. At the project site, the subsurface conditions …
Effect Of Earthquakes In Marshy Lands And Alluvial Soils: Case Histories, Saripalli Suryanarayana
Effect Of Earthquakes In Marshy Lands And Alluvial Soils: Case Histories, Saripalli Suryanarayana
International Conference on Case Histories in Geotechnical Engineering
This paper presents a case study of the various factors effecting foundations and piling in marsy lands and alluvial soils. Various aspects regarding these types of soils are presented in context of the Indian sub-continent. Various case studies are shown and practical inferences are drawn from them on the correct methodology of piling and foundation work to be performed in marshy and alluvial soils. Also examples from recent earthquakes in Gujarat, India are analyzed. . Precautionary measures such as light structures, with no cantilever, and no highrise buildings are a preliminary step. Further the overstressing of ground need to be …
Times Square Redevelopment: A Below Grade View, Tony D. Canale, James L. Kaufman, George J. Tamaro
Times Square Redevelopment: A Below Grade View, Tony D. Canale, James L. Kaufman, George J. Tamaro
International Conference on Case Histories in Geotechnical Engineering
The paper describes the design and construction of the foundations for two new high-rise structures in New York City (NYC). The sites are located in the heart of Times Square, bound by 42nd Street to the north, 41st Street to the south, and Broadway to the east. Below grade, active subways and subway stations abut the sites, extending as much as 50 feet into the property. The work involved the demolition of existing structures, excavation of debris and rock to depths exceeding 30 feet below grade, bracing adjacent subway structures around the site, installing high capacity caissons immediately adjacent to …
Nature And Properties Of Earthquake Energy And Waves And Their Contribution To Liquefaction Aspects At Adani Port During 2001 Bhuj Earth Quake, R. K. Katti, A. R. Katti
Nature And Properties Of Earthquake Energy And Waves And Their Contribution To Liquefaction Aspects At Adani Port During 2001 Bhuj Earth Quake, R. K. Katti, A. R. Katti
International Conference on Case Histories in Geotechnical Engineering
During Bhuj earthquake of 2001, certain distinct phenomenon in coastal saturated granular deposits were observed causing extensive distress to Adani Port facilities. An attempt is made to analyse the root cause by examining nature and properties of earthquake energy, geometry of earth and the origin of energy and propagation of waves, including excess pore water pressure contributed by Pwave. Although pile raft system were less damaged due to liquefaction, the tests showed extensive loss of load capacity. These aspects are presented in this paper.
Site Effects On Structure Damage And Surface Ground Motion Characteriscits In Tacna, Peru During Jun 23, 2001 MW 8.4 Earthquake, Jennifer L. Williams, Nien-Yin Chang, Pedro C. Repetto
Site Effects On Structure Damage And Surface Ground Motion Characteriscits In Tacna, Peru During Jun 23, 2001 MW 8.4 Earthquake, Jennifer L. Williams, Nien-Yin Chang, Pedro C. Repetto
International Conference on Case Histories in Geotechnical Engineering
At a magnitude of Mw 8.4, the June 23, 2001 southern Peru earthquake was the largest earthquake to have occurred anywhere in the world in the last 36 years and the largest in the region in 133 years. Many researchers have postulated the theory of the effect local site conditions can have on surface ground motion and resulting building damage intensities. However, due to the relative infrequency of earthquake occurrences, a limited number of major earthquakes have been evaluated in detail to better quantify the effects of site conditions using case studies. This paper presents the case history of …
A Comparison Of Wavelet Analysis Of Strong Motion Data Of Kocaeli, Duzce And Pulumur Earthquakes, Turkey, Berrak Teymur, S. P. Gopal Madabhushi
A Comparison Of Wavelet Analysis Of Strong Motion Data Of Kocaeli, Duzce And Pulumur Earthquakes, Turkey, Berrak Teymur, S. P. Gopal Madabhushi
International Conference on Case Histories in Geotechnical Engineering
In recent years there were several earthquakes in Turkey with magnitudes 7.4, 7.2 and 6 in Kocaeli, Duzce and Pulumur respectively. The first two occurred in 1999 causing the most damage both structurally and economically. The last happened in January 2003. These were all on the North Anatolian Fault and the earthquake occurrence was propagating towards east on the fault. Damage due to surface faulting, slope stability, liquefaction occurred during these earthquakes. In this paper the strong motion data acquired from these earthquakes at various locations are inspected using both the commonly used Fast Fourier transform and more recent harmonic …
The Newtown Creek Water Pollution Control Plant Upgrade Project: A Geotechnical Treatment, Domenic D’Argenzio, Hiren J. Shah, Hugh S. Lacy
The Newtown Creek Water Pollution Control Plant Upgrade Project: A Geotechnical Treatment, Domenic D’Argenzio, Hiren J. Shah, Hugh S. Lacy
International Conference on Case Histories in Geotechnical Engineering
The paper presents several geotechnical design and construction aspects of the Newtown Creek Water Pollution Control Plant upgrade project in Brooklyn, New York. The plant is located in the Greenpoint section of Brooklyn, adjacent to the south embankment of Newtown Creek. The original plant was constructed in the 1960s and serves portions of Brooklyn, Queens and Manhattan. The Department of Environmental Protection (DEP) of the City of New York is in the process of upgrading the plant to meet current and future treatment requirements. The upgraded plant, which is scheduled for completion by 2013, will be one of the largest …
Application Of Wavelets In Detection Of Cavities Under Pavements By Surface Waves, Nenad Gucunski, Parisa Shokouhi
Application Of Wavelets In Detection Of Cavities Under Pavements By Surface Waves, Nenad Gucunski, Parisa Shokouhi
International Conference on Case Histories in Geotechnical Engineering
A new seismic approach based on wavelet transforms of the surface response is proposed and applied to the problem of detection of shallow cavities under pavements. Seismic wave propagation is simulated by a transient response analysis on an axisymmetric finite element model. Shallow cavities in a homogeneous half-space and a pavement system of a variety of shapes and embedment depths are considered. The formulation of the continuous wavelet transform (CWT) is presented and its advantage over the traditional time or spectral analysis based methods is demonstrated through illustrative examples. The response of the medium at different surface points is presented …
Past Proceedings: 2nd International Conference On Recent Advances In Geotechnical Earthquake Engineering & Soil Dynamics (1991), Multiple Authors
Past Proceedings: 2nd International Conference On Recent Advances In Geotechnical Earthquake Engineering & Soil Dynamics (1991), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Behavior Of Piles In Liquefiable Soils During Earthquakes: Analysis And Design Issues, W. D. L. Finn, N. Fujita
Behavior Of Piles In Liquefiable Soils During Earthquakes: Analysis And Design Issues, W. D. L. Finn, N. Fujita
International Conference on Case Histories in Geotechnical Engineering
A general picture of the current state of the art and the emerging technology for dealing effectively with the seismic design and analysis of pile foundations in liquefiable soils is presented. Two distinct design cases are considered and illustrated by case histories. One is the static response of pile foundations to the pressures and displacements caused by lateral spreading of liquefied ground. The other is the seismic response of piles to strong shaking accompanied by the development of high pore water pressures or liquefaction. Design for lateral spreading is examined in the context of developments in design practice and the …
Environmental Geotechnics: Two Case Histories, James K. Mitchell, Richard A. Mitchell
Environmental Geotechnics: Two Case Histories, James K. Mitchell, Richard A. Mitchell
International Conference on Case Histories in Geotechnical Engineering
About 20 million gallons of liquid hazardous and toxic industrial wastes were disposed at the Hardage Site, about 35 miles southsouthwest of Oklahoma City, from 1972 to 1980. Following Superfund designation of this site by the EPA, identification of a few hundred companies as Potentially Responsible Parties, and a court ordered excavate, incinerate, and re-entomb remedy for its remediation, many of the companies joined to form the Hardage Site Remedy Corporation (HSRC) for implementation of design, construction, operation, and maintenance of the facility. With the aid of a panel comprised of experts in the disciplines relevant to contaminated site remediation, …
Liquefaction Hazard Mitigation By Prefabricated Vertical Drains, Kyle M. Rollins, R. Robert Goughnour, J. K. S. Anderson, Stacey F. Wade
Liquefaction Hazard Mitigation By Prefabricated Vertical Drains, Kyle M. Rollins, R. Robert Goughnour, J. K. S. Anderson, Stacey F. Wade
International Conference on Case Histories in Geotechnical Engineering
Liquefaction has typically been mitigated by in-situ densification; however vertical composite drains offer the possibility of preventing liquefaction and associated settlement while reducing the cost and time required for treatment. Three case histories are presented which describe the use of vertical drains to mitigate liquefaction hazard and techniques to control the flow of water exiting the drains. In addition, results from a test case are presented where controlled blasting techniques were used to evaluate drain performance in-situ. Blasting was successful in liquefying loose sand in an untreated test site. Similar blast charges were then detonated at adjacent sites treated with …
Local Geology Of New York City And Its Effect On Seismic Ground Motions, Sissy Nikolaou
Local Geology Of New York City And Its Effect On Seismic Ground Motions, Sissy Nikolaou
International Conference on Case Histories in Geotechnical Engineering
A thorough understanding of the local geologic and tectonic environment, the seismological history as well as very detailed site specific geotechnical and geophysical data are essential to the proper prediction of local site effects and seismic design in New York City (NYC). The site response in the NYC metropolitan area is affected by the widely varying geologic conditions encountered in the five boroughs. Along the spine of Manhattan Island rock extends well above sea level at the northern reaches, and falls to depths in excess of 250 m at the barrier islands at the southern extremities of NYC. Large areas …
The Failure Of Teton Dam – A New Theory Based On "State Based Soil Mechanics", V. S. Pillai, V. Muhunthan, N. Sasiharan
The Failure Of Teton Dam – A New Theory Based On "State Based Soil Mechanics", V. S. Pillai, V. Muhunthan, N. Sasiharan
International Conference on Case Histories in Geotechnical Engineering
Teton Dam failed during its first filling on 5 June 1976. The 405-ft high dam was designed and built using modern standards; therefore its failure received considerable scrutiny from engineering experts. Failure mechanisms suggested, included hydraulic fracture, internal erosion, wet-seam theory, and defects in the abutment rock. None of the investigations, however, were able to explain satisfactorily why the dam breached when the reservoir reached EL.5301.7 ft and only in the vicinity of Sta. 14+00 on the right abutment. The investigation here is focused on this crucial aspect of the failure using the modern framework of fundamental “state based soil …
Microzonation Studies For Delhi, Jabalpur & Dehradun As Impacted By Bhuj Earthquake, V. K. Mathur
Microzonation Studies For Delhi, Jabalpur & Dehradun As Impacted By Bhuj Earthquake, V. K. Mathur
International Conference on Case Histories in Geotechnical Engineering
History of earthquakes in our country demonstrate vulnerability to seismic hazards. The recent past, devastating earthquakes in urban areas in India causing heavy economical losses in terms of loss of life, property, disruption of services and damage to environment have been of great concern; the experiences have prompted to carry out in-depth studies and come out with solutions and policies which will go a long way in minimizing the damages caused by seismic ground motions. In this context, microzonation of urban areas have assumed new dimensions. Delhi, the capital city of India has a long seismic history and is being …
The Leaning Tower Of Pisa Revisited, J. B. Burland
The Leaning Tower Of Pisa Revisited, J. B. Burland
International Conference on Case Histories in Geotechnical Engineering
Stabilisation of the Leaning Tower of Pisa was achieved by means of an innovative method of soil extraction which induced a small reduction in inclination not visible to the casual onlooker. Its implementation has required advanced computer modelling, large-scale development trials, an exceptional level of continuous monitoring and daily communication to maintain control. Recently a number of historical examples have been found of the application of soil extraction to straightening leaning buildings – the earliest being 1832. Contemporary accounts of the work bring out interesting and important similarities and serve as reminders of the inventiveness and resourcefulness of engineers long …
Centrifuge Modelling Of Dynamic Soil Structure Interaction In Layered And Inhomogeneous Liquefiable Soil, B. Ghosh, S. P. G. Madabhushi
Centrifuge Modelling Of Dynamic Soil Structure Interaction In Layered And Inhomogeneous Liquefiable Soil, B. Ghosh, S. P. G. Madabhushi
International Conference on Case Histories in Geotechnical Engineering
In this paper the results of a series of dynamic centrifuge tests are reported. These tests were performed on different types of soil stratifications supporting a nuclear containment structure. Test results indicate that accelerations transmitted to the structure base are dependent on the stiffness degradation of the supporting soil. It is also conclusively shown that even partial liquefaction can be dangerous and the structure can tilt and rotate. Steady build up of excess pore pressure leads to softening of the soil, which decreases the shear modulus and shear strength and subsequently changes the dynamic responses. The characteristic frequency of the …
Meet Our Authors And Speakers, Multiple Authors
Meet Our Authors And Speakers, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
The Response Of Driven Single Piles Subjected To Combined Loads, D. T. P. Phillips, B. M. Lehane
The Response Of Driven Single Piles Subjected To Combined Loads, D. T. P. Phillips, B. M. Lehane
International Conference on Case Histories in Geotechnical Engineering
The behaviour of piles subjected to lateral load has generally been investigated experimentally using free-headed piles with a lateral load applied close to the pile head. In practice, however, there is some degree of restraint at the head of many piles and these are often subjected to a combination of lateral and vertical loads. The case history described in this paper involved full-scale field experiments comprising instrumented precast concrete piles subjected to a range of loading conditions including combined lateral and axial loading with partial rotational restraint at the pile head. The pile instrumentation, which included electrolevels and electrical resistance …
Grouting Technology For Rehabilitation Of Tillar Earthen Dam, Mahavir Bidasaria
Grouting Technology For Rehabilitation Of Tillar Earthen Dam, Mahavir Bidasaria
International Conference on Case Histories in Geotechnical Engineering
Over the last few decades grouting technology has grown into one of the disciplines in geotechnical engineering comprising mainly of foundation treatment of dams and other structures by strengthening or by making them impermeable and has become one of the main tool to rehabilitate the dams structurally. The present case study deals with structural rehabilitation of Tillar earthen dam which was constructed in 1987 but distress signals had started from the first impounding. Highly permeable strata having permeability to the tune of 0.36 x 10-1 cm/sec was existing between the bottom of Cut off Trench (COT) and foundation rock. From …
Estimation Of Liquefaction-Induced Ground Settlement (Case Studies), Jiaer Wu, Raymond B. Seed
Estimation Of Liquefaction-Induced Ground Settlement (Case Studies), Jiaer Wu, Raymond B. Seed
International Conference on Case Histories in Geotechnical Engineering
Over the past decade, the focus of liquefaction engineering began to shift towards assessment of the consequences of liquefaction with respect to the seismic performance of engineered structures and facilities, which requires accurate and reliable tools for prediction of ground deformations over the small to moderate range. Promising new predictive tools are evolving. These include simplified, empirical tools as well as sophisticated analytical and constitutive models. Recently, a high quality laboratory testing program consisting of undrained, cyclic simple shear testing on fully-saturated samples of Monterey No. 0/30 sand was completed at U.C. Berkeley. As a result, a new semiempirical procedure …
Soil Improvement With Jet-Grout Columns: A Case Study From The 1999 Kocaeli Earthquake, H. Turan Durgunoglu, Mauro Chinchelli, Selim Ikiz, Canan Emrem, Thomas Hurley, Faith Catalbas
Soil Improvement With Jet-Grout Columns: A Case Study From The 1999 Kocaeli Earthquake, H. Turan Durgunoglu, Mauro Chinchelli, Selim Ikiz, Canan Emrem, Thomas Hurley, Faith Catalbas
International Conference on Case Histories in Geotechnical Engineering
Soil improvement methods have been widely used to reduce the potential for liquefaction-related damages in sandy soils and strain-related problems in soft clays. The procedures and techniques used in the design of improved soil have been continuously improved. Filed case history data have always been crucial to refining such techniques and procedures. The 1999 Kocaeli Earthquake (M=7.4) struck northwestern Turkey and caused significant damage in urban and industrial areas along Izmit Bay. The sites were subjected to ground motions ranging from about 0.10g to 0.42g. This paper presents the performance of the Ipekkagit Tissue Factory site in Karamursel at the …
Landslides In Shale-Derived Glacial Till, Vernon R. Schaefer, Robert A. Lohnes
Landslides In Shale-Derived Glacial Till, Vernon R. Schaefer, Robert A. Lohnes
International Conference on Case Histories in Geotechnical Engineering
An area in south-east Iowa is notorious for landslides in both cut slopes and embankments. Most of the failed slopes have been modified to lower slope angles as attempted remediation; however in many instances the failure reoccurred. The dominant soil in the cuts and used for borrow material is Kansan age glacial till, while the underlying bedrock is Pennsylvanian shale of the Des Moines series. The till contains significant amounts of the underlying bedrock. In an effort to gain insight into the cause of these failures, an embankment with extensive failures in Monroe County was studied. One slide selected for …
Urban Environmental Vibration Induced By Underground Railway, Lu Li, Yang Xianjian
Urban Environmental Vibration Induced By Underground Railway, Lu Li, Yang Xianjian
International Conference on Case Histories in Geotechnical Engineering
It is well known that in general the underground railways always cause urban environmental vibration. Therefore, the more the underground railways which were built or under construction, the more serious the environmental vibration is. It is difficult to estimate to what degree the vibration, which was generated in the ground propagation by subway, attenuated with distance. At present, no practical method is available to calculate the ground vibration in current engineering by theory of wave. The effect of geometric damping、elastic wave theory in soil、material damping、equivalent radius of wave source of subway、the frequency of tunnel structure、source, which interacted around the soil …
Geotechnical Investigations For Design Of Foundations For Erosion And Flood Control Structures At Unwana Beach, Afikpo, Ebonyi State, South-Eastern Nigeria, So-Ngo Clifford Teme, Patrick Omorodion Youdeowei
Geotechnical Investigations For Design Of Foundations For Erosion And Flood Control Structures At Unwana Beach, Afikpo, Ebonyi State, South-Eastern Nigeria, So-Ngo Clifford Teme, Patrick Omorodion Youdeowei
International Conference on Case Histories in Geotechnical Engineering
Erosion occasioned by annual floods along the Cross River at Unwana Beach, Afikpo, situated on latitude 8° 00’ 00’’ North of the Equator and longitude 5° 40’ 15’’ East of the Greenwich Meridian, has threatened the location of a Water Pumping and Treatment Station nearby. Geotechnical investigations carried out using the Shell-and-Auger rig along the shoreline of the Unwana Beach indicated that the subsurface consists of between 3.00 to 8.00 meters of Yellowish brown silty clay layer (CL) underlain by about 3.00 meters of Dark, clayey sands (SC). These are further underlain by between 0.00 – 4.00 meters of Reddish …
Stabilization Of The Dividing Wall At A Drinking Water Reservoir, Ingo Fox, Burjor Kharivala
Stabilization Of The Dividing Wall At A Drinking Water Reservoir, Ingo Fox, Burjor Kharivala
International Conference on Case Histories in Geotechnical Engineering
The Reservoir is a component of the water supply system of a major city in the northeastern United States. The reservoir receives water conveyed by aqueducts and pressure tunnels from several watershed reservoirs. It is a balancing reservoir that regulates water flow and maintains the elevation head needed for the water tunnel distribution system to the south of the reservoir, which services the city inhabitants. The reservoir water surface is approximately 90 acres, and is contained by a man-made rim earth embankment, 40 feet in average height. The reservoir, which has an oval shape, is lined with a paneled concrete …