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Articles 211 - 240 of 363
Full-Text Articles in Geotechnical Engineering
Addressing The Geotechnical Case Histories Of Beirut, Jacques Harb
Addressing The Geotechnical Case Histories Of Beirut, Jacques Harb
International Conference on Case Histories in Geotechnical Engineering
The case histories of Beirut geotechnical practice is an important teaching example concerning deep and specialty foundations. Micro-piles, tie-back retaining structures, and sheet pile-walls are common practices around Beirut. The city, having reached its saturation potential and real estate prices escalating, is moving vertically to optimize investments and toward deeper exploration of underground space. The diverse geology poses also real challenges to the geotechnical practicing engineers with karstic terrains and cavities, liquefiable sandy zones and high salt water table. The geographical constraints are pushing the city toward a better exploration of land reclamation solution over a large surface of the …
One Hundred Years Settlement Of The Verna’S Breakwater - Construction On Soft Clay Like A Typical Example From University Program Of Port Construction In Bulgaria, Chavdar Vassilev Kolev
One Hundred Years Settlement Of The Verna’S Breakwater - Construction On Soft Clay Like A Typical Example From University Program Of Port Construction In Bulgaria, Chavdar Vassilev Kolev
International Conference on Case Histories in Geotechnical Engineering
The breakwater of the bigger Bulgarian Black See Port has erected in the first years of the XX-th century near Varna. Soon after the complained of its construction considerable settlements have appeared. Some times during the one hundred years superstructures and gravity increasing on the soil around the breakwater have made. The last restoration has made around 30 years ago and after that – 10 years later too when concrete tetrapodes have laid before the structure. Thereafter the settlements are continuing. The investigations and studies point out local no stability soil. It is delay to apply a send bed, known …
Use Of Case Histories To Enhance Practical Geotechnical Engineering, K. S. Babu Narayan, B. M. Sunil
Use Of Case Histories To Enhance Practical Geotechnical Engineering, K. S. Babu Narayan, B. M. Sunil
International Conference on Case Histories in Geotechnical Engineering
Mathematical models are constructed to describe the behavior of engineering systems in quantitative terms. During conceptualization stage of modelling several valid assumptions have to be made so as to make the model predict the behavior of the system as accurately as possible. Refinement of mathematical models need feed back from practice. Many practical cases are of interest in updating and enhancing quantitative judgment of geo-technical systems behavior. This paper envisages to present a few interesting cases where the situation forced true synthesis of theory and practice for innovation and advancement of practical geo-technical engineering.
Use Of Case Histories In The Classroom, Carsten H. Floess
Use Of Case Histories In The Classroom, Carsten H. Floess
International Conference on Case Histories in Geotechnical Engineering
Use of case histories provides an important role in Civil Engineering education, presenting an opportunity for students to extend the principles found in textbooks to real world, practical problems. Case histories provide students with a sense of judgment and a sampling of the “art” in geotechnics. The author, an Adjunct Professor of Civil Engineering at Rensselaer Polytechnic Institute, has used contemporary case history examples related to foundation and geotechnical engineering to supplement and invigorate classroom instruction and prepare students for the workforce. Typical examples related to foundation engineering include: • Design of subsurface investigation programs for structures, wastewater treatment plants, …
Bond Strength Of Hollow-Core Bar Micropiles, Jesús E. Gómez, Carlos J. Rodriguez, Helen D. Robinson, Johanna Mikitka, Larry Keough
Bond Strength Of Hollow-Core Bar Micropiles, Jesús E. Gómez, Carlos J. Rodriguez, Helen D. Robinson, Johanna Mikitka, Larry Keough
International Conference on Case Histories in Geotechnical Engineering
The foundation of two bridges was retrofitted using micropiles. The micropiles consisted of hollow core bars installed under limited headroom conditions. Of the total number of micropiles, 180 were installed in submerged sand and 80 were installed in stiff, silty clay. The micropiles were drilled using a lean cement grout which was re-circulated for de-sanding and re-use. Final grout was injected upon completion of drilling to the design tip elevation. The micropiles were subject to a rigorous quality control that included grout quality testing and proof-testing of each production micropile. All production micropiles were proof-tested up to 150 percent of …
Case Histories Of Foundations On Top Of A Rupturing Normal Fault During The Kocaeli 1999 Earthquake, G. Gazetas, I. Anastasopoulos
Case Histories Of Foundations On Top Of A Rupturing Normal Fault During The Kocaeli 1999 Earthquake, G. Gazetas, I. Anastasopoulos
International Conference on Case Histories in Geotechnical Engineering
Although the Kocaeli (Turkey) earthquake was triggered by reactivation of the North Anatolian strike-slip Fault, normal faulting also occurred within the pull-apart basin of Gölcük. Its effect on overlying structures is summarized in this paper. The normal rupture caused maximum vertical displacements of up to 2.5m. Several structures were crossed by the rupture. As expected, many of them either collapsed or were severely damaged. Surprisingly, several structures survived the dislocation with no damage, while in some cases the rupture deviated, “avoiding” the structures. The foundations of the involved structures comprised a variety of types, ranging from simple separate footings to …
Soil And Structure Vibrations From Construction And Industrial Sources, Mark R. Svinkin
Soil And Structure Vibrations From Construction And Industrial Sources, Mark R. Svinkin
International Conference on Case Histories in Geotechnical Engineering
Construction and industrial dynamic sources can produce environmental vibration problems for adjacent and remote structures. High vibrations and unacceptable dynamic settlements could disturb sensitive devices and people and even be the cause of structural damage. The dynamic sources, the geology at a site, and the condition of structures affect ground and structure vibrations. Each construction or industrial site is unique and requires consideration of specific approaches at the site for decreasing vibration effects of construction activities or industrial dynamic sources on surrounding structures. Specifications prepared for a site, calculation and prediction of expected vibrations, and monitoring and control of ground …
Incorporating Case Study And Site Visit For Teaching Of Earth And Hydraulic Structures At Universiti Putra Malaysia, A. M. Thamer, A. A. Aziz, B. B. K. Huat
Incorporating Case Study And Site Visit For Teaching Of Earth And Hydraulic Structures At Universiti Putra Malaysia, A. M. Thamer, A. A. Aziz, B. B. K. Huat
International Conference on Case Histories in Geotechnical Engineering
Case studies are widely used in civil engineering research but not in education and training. Case studies are important in the teaching of various subjects in the field of civil engineering. Site visits can also help to facilitate the students in recognizing and understanding the behaviour of structures and systems, especially when the students do not have any idea about them. The field of civil engineering covers a wide range of structures ranging from small to mega structures. Usually, small structures are seen regularly by the student and their behaviors are easy to comprehend. But mega structures such as dams …
Qinghai-Tibet Railway, China And The Solutions To Its Major Geotechnical Problems For Construction, Lanmin Wang, Zhijian Wu, Junjie Sun, Luxin Zhang
Qinghai-Tibet Railway, China And The Solutions To Its Major Geotechnical Problems For Construction, Lanmin Wang, Zhijian Wu, Junjie Sun, Luxin Zhang
International Conference on Case Histories in Geotechnical Engineering
The Qinghai-Tibet Railway (QTR) is the highest-elevation one for passenger trains in the world and the first railway to connect central China to Tibet. Construction of this railway starting in 2001 had to contend with major geotechnical challenges, such as permafrost, environmental protection and seismic hazards. Its completion in 2006 is a remarkable feat in the world’s railway construction history and crystallization of wisdom of human beings. In this paper, the planning and preparing history and the construction project of QTR are introduced. The major three thorny problems, permafrost, lack of oxygen and environmental frangibility for the construction and their …
Conference Director, Shamsher Prakash
Conference Director, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Other Special (Osp) Lectures, Multiple Authors
Other Special (Osp) Lectures, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Symposium - James K. Mitchell, Multiple Authors
Symposium - James K. Mitchell, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Performance Of Deep Soil Nailed Walls, H. Turan Durgunoğlu
Performance Of Deep Soil Nailed Walls, H. Turan Durgunoğlu
International Conference on Case Histories in Geotechnical Engineering
Exactly 40 years ago, one sunny September day, I found myself at the secretarial office of Geotechnical Engineering at UC Berkeley. I was very excited because it was going to be the first meeting with my advisor, Professor James K. Mitchell. Although I had previously received a very warm welcome letter from Professor Mitchell, I was convinced the meeting would be a very different experience for a foreign student from Turkey. Upon entering his office, and receiving a warm welcome, my assignment as a Research Assistant at the Richmond Field Station was explained to me and my schedule of classes …
Soil Dynamics Course Schedule, Ahmed Elgamal, Shamsher Prakash
Soil Dynamics Course Schedule, Ahmed Elgamal, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Post-Conference Tour, Multiple People
Post-Conference Tour, Multiple People
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
A Historical Perspective On Geotechnical Case Histories Courses, J. David Rogers
A Historical Perspective On Geotechnical Case Histories Courses, J. David Rogers
International Conference on Case Histories in Geotechnical Engineering
Ralph Peck introduced the concept of using a geotechnical case histories course to teach students problem solving and technical communications skills, beginning around 1956. This course was developed as a professional practice course at the graduate level, intended for civil engineers of diverse backgrounds as well as geoscientists. Students were required to prepare one-page summaries of each case history profiled in the course, a requirement that left an enormous impression on the students. A different approach was employed by the University of California, Berkeley, beginning around 1970. Berkeley offered two graduate courses in the mold of ABET “capstone courses,” graduate …
Ground Vibrations Induced By Impact Pile Driving, K. Rainer Massarsch, Bengt H. Fellenius
Ground Vibrations Induced By Impact Pile Driving, K. Rainer Massarsch, Bengt H. Fellenius
International Conference on Case Histories in Geotechnical Engineering
The importance of vibration problems induced by pile driving is addressed and guidelines for establishing limiting vibration levels with respect to buildings with different foundation conditions are presented. Basic concepts of pile dynamics and stress-wave measurements, which were developed for the determination of driving resistance and bearing capacity of impact-driven piles, provide important information about ground vibration induced by pile penetration. Dynamic hammer properties and geometry as well as the driving process are important for ground vibration emission from the pile. It is shown that the energy-based, empirical approach, which is still widely used by practicing engineers, is too crude …
Evaluation Of The Experiences In Underwater Dam Construction On Soft Soils, W. F. Van Impe
Evaluation Of The Experiences In Underwater Dam Construction On Soft Soils, W. F. Van Impe
International Conference on Case Histories in Geotechnical Engineering
The present paper illustrates the outcome of the monitoring of the consolidation behavior of a soft foundation soil under a large submerged sand embankment. Measurements of settlements and excess pore water pressures showed a good agreement with predictions evaluated using the large strain consolidation theory. Soft soil improvement by means of deep mixing has been optimized. Moreover, the principles and developments of underwater geosynthetics applications are discussed.
Case Studies In Forensic Geotechnical And Foundation Engineering, D. S. "Sax" Saxena
Case Studies In Forensic Geotechnical And Foundation Engineering, D. S. "Sax" Saxena
International Conference on Case Histories in Geotechnical Engineering
Forensics in the geo-domain encompasses an extensive array of topics with specific emphasis in geotechnical related fields. A new discipline known as forensic geotechnical engineering (FGE) has been created to deal with investigations of soil-interaction related failures of engineered facilities or structures. A practicing geotechnical engineer cannot provide services without the fear of a lawsuit. Services of geotechnical engineers experienced in jurisprudence system are commissioned to investigate such failures. This paper presents two case histories where forensic geotechnical engineering was effectively utilized to identify, investigate, and remediate the problem as well assist in litigation. The first case history identifies a …
State Of The Art And Practice (Soap), Multiple Authors
State Of The Art And Practice (Soap), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Sixth International Conference On Case Histories In Geotechnical Engineering, Arlington (2008), Multiple Authors
Past Proceedings: Sixth International Conference On Case Histories In Geotechnical Engineering, Arlington (2008), Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Co-Sponsors, Multiple Members
Co-Sponsors, Multiple Members
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Deformations Of Existing Buildings, Caused By Construction Activities, V. A. Barvashov, E. A. Parfenov, P. I. Yastrebov, A. N. Gavrilov, E. M. Gryaznova
Deformations Of Existing Buildings, Caused By Construction Activities, V. A. Barvashov, E. A. Parfenov, P. I. Yastrebov, A. N. Gavrilov, E. M. Gryaznova
International Conference on Case Histories in Geotechnical Engineering
Construction of a new building (NB) affects existing adjacent old buildings (OB) during pit excavation, piling, footing and NB erection. Two relevant history cases are described. In the first one, the graphs of OB settlements versus distance from the pit are given for the period of pit excavation and the total settlements for the period of NB erection. The second case gives the family of OB settlement time-related graphs versus distance from the pit, in which these settlements were caused by piling operations.
Case Histories Of Settlement Performance Comparisons On Ground Improvement Using Soil Stiffness, J. D. Redgers, A. L. Moxhay, G. S. Ghataora, I. Jefferson
Case Histories Of Settlement Performance Comparisons On Ground Improvement Using Soil Stiffness, J. D. Redgers, A. L. Moxhay, G. S. Ghataora, I. Jefferson
International Conference on Case Histories in Geotechnical Engineering
Ground improvements often aim to reduce settlement risks for foundations and this requires reliable methods of prediction. Current approaches are based on empirical procedures and methods developed over 30 years ago. This has resulted historically in designs and installations of unnecessarily sophisticated foundations. In addition many developments now encountered by ground improvement contractors involve previously developed or ‘brownfield’ sites made up of heterogeneous and variable made ground. Methods to predict settlements traditionally use destructive and invasive approaches such as SPT or CPT that can be insensitive to time dependent changes, which often occur when brownfield sites are improved. By comparison …
Case Histories Of Damage Of Foundations Near Sliding Slopes, Constantine A. Stamatopoulos
Case Histories Of Damage Of Foundations Near Sliding Slopes, Constantine A. Stamatopoulos
International Conference on Case Histories in Geotechnical Engineering
The paper studies the effect of large slope movements on foundations through case histories. More than 30 well-documented case histories of damaged buildings near the tip of slopes due to excessive movement caused by either heavy rain or earthquakes were collected. The case histories showed that a critical factor affecting the level of damage of buildings, is the coefficient Ι, that is defined as the ratio of the width below the foundation that settles by the total width of the foundation: (a) When Ι < 0.2, collapse does not occur, even if settlement is very large, (b). When 0.2 < Ι < 1.0, the level of damage depends both on settlement and the factor l. (c) When Ι=1, buildings may not collapse, even if the settlement is very large, about 1m, but damage and rotation may be high. The above hold regardless of the cause of the slide: heavy rain or earthquake.
Lessons Learned From Two Case Histories Of Retaining Structures, Pedro Simão Sêco E Pinto, João Barradas, Arlindo Sousa
Lessons Learned From Two Case Histories Of Retaining Structures, Pedro Simão Sêco E Pinto, João Barradas, Arlindo Sousa
International Conference on Case Histories in Geotechnical Engineering
In this paper two case histories are addressed. The first case history describes the underpinning and reinforcement of huge retaining walls due to the crossing of the old Rossio railway station building (1886) by an underground gallery (for the Lisbon Metro). A careful study was performed for this station in order to avoid unacceptable damages. These walls sustain an embankment on which the railway platforms were built. The second case history deals with the stabilization works of a landslide in Portugal. The lessons arising from technical and non technical factors related with slides are analysed, and the anchored retaining walls …
Elasto-Plastic Soil-Structure Interaction Analysis Of Building Frame-Soil System, Manjeet Hora
Elasto-Plastic Soil-Structure Interaction Analysis Of Building Frame-Soil System, Manjeet Hora
International Conference on Case Histories in Geotechnical Engineering
The conventional building frame analysis is carried out assuming unyielding supports and ignoring the interactive response of supporting soil media. In fact, the building frame and its foundation along with the soil mass on which it rests together constitute a single integral compatible structural unit to resist the loads. A proper idealization of the building frame-foundation-soil system is thus needed for accessing the realistic and more accurate analysis. The interaction system analyzed in this way yields a rational structural behavior as the shear forces and bending moments get significantly altered due to the resulting differential settlements of soil mass. In …
Foundation Design For The Burj Dubai – The World’S Tallest Building, Harry G. Poulos, Grahame Bunce
Foundation Design For The Burj Dubai – The World’S Tallest Building, Harry G. Poulos, Grahame Bunce
International Conference on Case Histories in Geotechnical Engineering
This paper describes the foundation design process adopted for the Burj Dubai, the world’s tallest building. The foundation system is a piled raft, founded on deep deposits of carbonate soils and rocks. The paper will outline the geotechnical investigations undertaken, the field and laboratory testing programs, and the design process, and will discuss how various design issues, including cyclic degradation of skin friction due to wind loading, were addressed. The numerical computer analysis that was adopted for the original design together with the check/calibration analyses will be outlined, and then the alternative analysis employed for the peer review process will …
Evaluation And Repair Of A Subterranean Parking Garage To Resist Hurricane Flood Levels, Matthew E. Meyer, Lijian Zhou, Cristina M. González
Evaluation And Repair Of A Subterranean Parking Garage To Resist Hurricane Flood Levels, Matthew E. Meyer, Lijian Zhou, Cristina M. González
International Conference on Case Histories in Geotechnical Engineering
Near-surface groundwater levels and high flood levels associated with flooding events impose significant hydrostatic forces on subterranean parking structures in Florida. Unique geologic conditions and the associated high hydraulic conductivities of the subsurface materials have precluded the use of conventional underdrain systems to provide hydrostatic relief. The case history presented here discusses the evaluation and repair of a subterranean parking garage of an existing office building that exhibited signs of distress including severe cracking of the ground floor slab, excessive quantities of water continuously seeping through these cracks and ponding water. Although various rehabilitation alternatives were evaluated, removal, replacement and …
Foundation Rehabilitation Of Bridge Over Danube: The Role Of Pile Integrity Testing, W. Wu, M. S. Acharya, F. Aschauer, J. Ludwig
Foundation Rehabilitation Of Bridge Over Danube: The Role Of Pile Integrity Testing, W. Wu, M. S. Acharya, F. Aschauer, J. Ludwig
International Conference on Case Histories in Geotechnical Engineering
The construction of the bridge near Pöchlarn over Danube, in Austria was begun 1998 and completed in 2002. The four middle piers of the bridge consist of sink caissons made of pre-cast reinforced concrete elements. Each caisson is founded on 18 bored piles of 1.2 m diameter. In a first step, two pilot piles of about 40 m length are installed for each caisson. After the pilot piles were completed, an accident happened in April 1999. A cargo ship collided with the pier no 3 and damaged the two pilot piles. Since the piles were below water level, it was …