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Articles 391 - 420 of 997
Full-Text Articles in Civil and Environmental Engineering
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 …
History Of Ultimate Limit State Of Bored Piles, Petr Koudelka
History Of Ultimate Limit State Of Bored Piles, Petr Koudelka
International Conference on Case Histories in Geotechnical Engineering
In European Union, the basic geotechnical code "EUROCODE 7 - Geotechnical design, Part 1 - General rules" (EC7-1) has been finished and its National Annexes have been drafted. The designs according to both EC7-1 and the Czech basic standard ČSN 73 0031 “Structural reliability – Basic requirements for design” are based on the Limit State Design theory. However, there is a principal difference between the inputs according to EC7-1 and the inputs according to ČSN 73 0031. In general, the input difference results in too conservative (ineffective) designs according to EC7-1 and more effective (more optimistic) designs according to ČSN. …
Case History Of Osterberg Cell Testing Of A Φ1500mm Bored Pile And The Interpretation Of The Strain Measurements For Princess Tower, Dubai, U.A.E., A. Canan Emrem, H. Fatih Kulac, H. Turan Durgunoglu, Gorkem Icoz
Case History Of Osterberg Cell Testing Of A Φ1500mm Bored Pile And The Interpretation Of The Strain Measurements For Princess Tower, Dubai, U.A.E., A. Canan Emrem, H. Fatih Kulac, H. Turan Durgunoglu, Gorkem Icoz
International Conference on Case Histories in Geotechnical Engineering
This paper reports a well-documented case history of a successful Osterberg Cell testing performed on a working pile cast for the foundations of the Princess Tower in Dubai. Princess Tower which is considered as the tallest residential tower in the world (currently being registered with Guiness Book & Records) up to an approximate 5000 tons demonstrating the efficiency of the testing methodology when accompanied by high-quality construction technique. The tower is 107 floors high and contains a combination of luxury apartments, offices, sales outlets, car parking spaces, sports and recreational clubs and hotel suites. The Osterberg load test was carried …
On Pile Foundation Performance In The Offshore Fields Of Qatar: Installation Evaluations, Discrepancies, And Remedial Measures, Waddah Akili
On Pile Foundation Performance In The Offshore Fields Of Qatar: Installation Evaluations, Discrepancies, And Remedial Measures, Waddah Akili
International Conference on Case Histories in Geotechnical Engineering
This paper addresses discrepancies between design of driven piles for offshore platforms in Qatar, the Arabian Gulf, and their “as-installed” ultimate capacities and safety factors. The paper makes use of pile installation records derived from several platforms in the offshore of the Gulf Region. More specifically, the paper evaluates “as–installed” ultimate capacities and safety factors, recommends remedial installation procedures when piles refuse before design penetration is achieved, and proposes a means for determining pile acceptability for piles meeting refusal short of design penetration. This case history offers what is believed to be relevant recommendations to guide the design and installation …
Pile Driving And The Elastic Rebound Theory, Kumars Zand-Parsa, Kamran Zand-Parsa
Pile Driving And The Elastic Rebound Theory, Kumars Zand-Parsa, Kamran Zand-Parsa
International Conference on Case Histories in Geotechnical Engineering
Almost all the bridge footings in southern California are on piles due to the soil condition. Steel (H & W), reinforced concrete and steel pipe filled with reinforced concrete are common piles that are using at bridge abutment and bent footings. Various methods and procedures are available when using known driving energy to determine the bearing capacity of the pile. These procedures can be categorized into three areas: (1) pile driving formulas, (2) wave equation analysis of pile driving, and (3) dynamic pile driving analysis. Pile driving formulas all utilize the energy delivered per blow, the resistance to movement of …
Design And Load Verification Of Driven Pile Foundations, Ching Tsai, Zhongjie Zhang
Design And Load Verification Of Driven Pile Foundations, Ching Tsai, Zhongjie Zhang
International Conference on Case Histories in Geotechnical Engineering
Eleven pile load tests were reviewed and analyzed to document the issues related to the design and load tests of driven pile foundations for a new bridge construction project in Louisiana. This project involves the design and construction of an elevated bridge approximately 17 miles in length. The project area is located in a Coastal Deltaic Plain, Saline Marsh area, underlain by slightly under-consolidated to normally-consolidated weak clays to depths greater than 200 feet. Environmental and site constraints limited the use of pile types and load test methods for this project. The geotechnical investigation methods consist of both cone penetration …
Tank Settlement Due To Highly Plastic Clays, Ashraf El Far, John Davie
Tank Settlement Due To Highly Plastic Clays, Ashraf El Far, John Davie
International Conference on Case Histories in Geotechnical Engineering
Settlement during hydro-testing of two 30-m diameter oil tanks was generated mostly by a layer of highly plastic clay at about 10 m depth. Based on about 5 months of readings on one of the tanks, the total predicted settlement at the tank perimeter was about 300 mm (with little differential movement) and at the center was closer to 550 mm. The settlement of a 7-m diameter water tank located close to the oil tanks followed quite a different pattern during hydro-testing. Within about 6 days, the tank had settled about 130 mm on one side, but only about 20 …