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Articles 10501 - 10530 of 21775
Full-Text Articles in Engineering
Application Of Case Studies In Education: Panel Presentation For Session 11, Friday, Aug 15, Peter Scharle
Application Of Case Studies In Education: Panel Presentation For Session 11, Friday, Aug 15, Peter Scharle
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Oriented Teaching Of Geotechnical Engineering, Sukhmander Singh
Case Histories Oriented Teaching Of Geotechnical Engineering, Sukhmander Singh
International Conference on Case Histories in Geotechnical Engineering
Integration of theory and practice in the teaching of geotechnical engineering have been examined on the basis of several years of teaching of foundation engineering. Most geotechnical analyses and relationships for use in design are developed under idealized boundry conditions. It has been shown by the use of case studies that an understanding of the departure between the idealized and the real boundry conditions is essential for the practice of geotechnical engineering. The case studies have also been used to teach students that the success of a geotechnical engineer depends upon how well he/she bridges the gap (departure) between the …
Educating Students Through Understanding The Pathology Of Geotechnical Projects, Mohamed Djebbi, Mounir Bouassida
Educating Students Through Understanding The Pathology Of Geotechnical Projects, Mohamed Djebbi, Mounir Bouassida
International Conference on Case Histories in Geotechnical Engineering
Three projects of end of studies which are related to soil mechanics pathology case histories were undertaken by students at civil engineering department of National Engineering School of Tunis. The two first projects dealt with Joumine and Sidi Saâd earth dams cases. For Joumine dam, concrete slabs of the spillway have been affected by serious disorders. The first disorder is related to the swelling nature of soil foundation of concrete slabs. The second disorder is attributed to high excess pore pressure responsible of slabs up risings. As solution the jet grouting technique was designed to eliminate high pore pressure in …
Exploring Case Histories: Chocolatetown, Pa, Matthew Mauldon, Kristin Brennan
Exploring Case Histories: Chocolatetown, Pa, Matthew Mauldon, Kristin Brennan
International Conference on Case Histories in Geotechnical Engineering
Case histories are invaluable components of civil engineering education in general and geotechnical engineering education in particular. They provide real world context for engineering methodologies studied in class, and serve as vehicles for discussing ancillary issues related to cost, communication, logistics, and many other factors. As commonly used in university courses, however, students encounter case histories as observers, and often on a fairly superficial level. Learning of concepts and methods, on the other hand, best takes place through active learning rather than through passive observation. To maximize their effectiveness as teaching tools, many case histories can be cast in a …
Josef Exploration Drift – From Exploration Of Gold To Unique Facility For Geotechnical Research, Education And Training, Jiri Slovak, Jiri Svoboda, Radek Vasicek, Pavla Bauerova
Josef Exploration Drift – From Exploration Of Gold To Unique Facility For Geotechnical Research, Education And Training, Jiri Slovak, Jiri Svoboda, Radek Vasicek, Pavla Bauerova
International Conference on Case Histories in Geotechnical Engineering
The Josef exploration drift was established in the 1980s for the underground exploration of gold deposits, the largest gold deposits in Central Europe. From 2005 to the beginning of 2007 the drift was transformed into an educational and research facility. The Josef Underground Educational Facility is intended to be a multidisciplinary workplace. Its main use c
Emerging Innovative Solutions Enhancing Practical Geotechnical Engineering, Shubhada S. Jagtap, Annapurni Iyer, Minimol Korulla
Emerging Innovative Solutions Enhancing Practical Geotechnical Engineering, Shubhada S. Jagtap, Annapurni Iyer, Minimol Korulla
International Conference on Case Histories in Geotechnical Engineering
This paper presents two case histories, wherein double twisted hexagonal wire mesh crates and netting were used as a solution for geotechnical problems that aroused while execution. One of which is worldwide known and one of the most prestigious projects of India - Konkan Railway, and second is internationally noted tourist spot- Amby Valley Sahara lake city. In Konkan Railway project, double twisted wire mesh was used as a basic material for variety of problems like rock fall prevention, Gravity walls at the base of rock slopes, Baby Gabions as ballast retention for railway tracks, Platform Gabions etc. Adoption of …
Foundations Of The Nation: The Hillbrow And Brixton Towers As Figurations Of National Identity In South Africa, Lizè Groenewald, Francis Legge
Foundations Of The Nation: The Hillbrow And Brixton Towers As Figurations Of National Identity In South Africa, Lizè Groenewald, Francis Legge
International Conference on Case Histories in Geotechnical Engineering
In its accreditation of degrees, the Engineering Council of South Africa (ECSA) requires the inclusion, in any curriculum, of 10% of total credits of what are termed complementary studies that encompass reflections upon environmental impact, legal matters, cultural heritage and design philosophies as they pertain to the engineering profession. By stipulating this inclusion ECSA acknowledges that engineering can no longer be regarded as a neutral, apolitical endeavour. This paper responds to the latter position and sets out to offer a broadening of the current scope of scholarly dialogue between a logical science and the human community which it serves. In …
Implications Of Swelling Clays On Asphalt Pavement Performance In Colorado, Scott Shuler
Implications Of Swelling Clays On Asphalt Pavement Performance In Colorado, Scott Shuler
International Conference on Case Histories in Geotechnical Engineering
Asphalt pavements constructed directly over high plasticity clays appear to be more susceptible to premature cracking parallel to the gutter on curb and gutter pavement cross sections than pavements with crushed stone bases. This paper describes five factors common to two sites studied that may be contributors to this early distress. These factors are: cracking is top-down; moisture content of the subgrade soils beneath the cracks is higher than optimum; density of the subgrade soils beneath the cracks is lower than optimum; subgrade soils are highly plastic; full-depth construction; and all pavements had curb and gutter typical sections. In addition, …
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 …
Landslides In Balchik –The Biggest Nature Experiment For Shore Protection In Bulgaria, Chavdar Vassilev Kolev
Landslides In Balchik –The Biggest Nature Experiment For Shore Protection In Bulgaria, Chavdar Vassilev Kolev
International Conference on Case Histories in Geotechnical Engineering
The nice ancient Bulgarian town Balchik is situated on deep (70m) landslide on the Bulgarian Black Sea cost. The genesis of this enormous landslide is supposed in last geological periods when the Black Sea level had changed around 300m. The geologic structure is a celebrated combination of Sarmat limestone, marl and sensitive clay. The mechanics of failure reminds the landslides of Anchorage (Alyaska) from 1962 even without tsunami. Through 80-th and 90-th years of the last century the landslide has been protected by the complex of, maybe, all known means for Cost protection and the aim has attained. The complex …
Use Of Case Histories To Enhance Practical Geotechnical Engineering, Liaqat Ali, Sarfraz Ali
Use Of Case Histories To Enhance Practical Geotechnical Engineering, Liaqat Ali, Sarfraz Ali
International Conference on Case Histories in Geotechnical Engineering
A geotechnical case history is a complete cycle; spread over events such as, investigation, design, execution, completion, and monitoring, of understudy project. In case histories the events are continuously monitored, evaluated, modified (if required), executed and corresponding responses / effects are recorded. Case histories help us learn from the past without living in the past, their analysis envision us to enhance practical engineering in the present and future. A geotechnical case history may be performed in an organizational framework or initiated by an interested research engineer in an individual capacity. In all circumstances; a case history would aim at exploring …
Bearing Capacity Evaluation Of Long, Large-Diameter, Open-Ended Piles, Yoshiaki Kikuchi
Bearing Capacity Evaluation Of Long, Large-Diameter, Open-Ended Piles, Yoshiaki Kikuchi
International Conference on Case Histories in Geotechnical Engineering
Recent changes in port construction in Japan include the use of deeply embedded large-diameter steel pipe piles. However, little change has been made to the procedure for estimating the bearing capacity of piles. An international comparison of bearing capacity estimation techniques and examination of the bearing capacity mechanism of open-ended piles were conducted. In this study, the plugging phenomenon was thoroughly investigated by means of field loading tests, large- and small-scale laboratory experiments with X-ray CT scanner, and numerical analysis.
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 …
Aging Of Sand – A Continuing Enigma?, James K. Mitchell
Aging Of Sand – A Continuing Enigma?, James K. Mitchell
International Conference on Case Histories in Geotechnical Engineering
Sand aging, a process during which the engineering properties of clean sands such as stiffness, penetration resistance and liquefaction resistance may exhibit considerable improvement over periods of only weeks to months after deposition and/or densification by different ground improvement processes, has been shown over the past 30 years to be of considerable practical importance. Numerous examples from a range of projects are presented. Chemical, physical-mechanical, and microbiological processes are examined relative to their adequacy for explaining the observed behavior. Although chemical precipitation-cementation reactions had initially been considered a primary cause, the evidence clearly favors a secondary compression-like process during which …
New York City High-Rises On Rock: Uncovering The Unknown Leads To Variable Foundation Solutions, Tony D. Canale, Joel Moskowitz, James L. Kaufman
New York City High-Rises On Rock: Uncovering The Unknown Leads To Variable Foundation Solutions, Tony D. Canale, Joel Moskowitz, James L. Kaufman
International Conference on Case Histories in Geotechnical Engineering
Construction of high-rise towers in New York City continues to provide exciting challenges for design and construction teams. Sites are becoming increasingly more difficult to build on as “desirable” locations have long since been developed and developers are constructing on sites that were previously over looked. This paper describes two projects that provided unique challenges to the engineers and contractors. The first site is the New York Times Headquarters Tower. This site appeared to be a fairly straightforward foundation design, but became complicated as the subsurface conditions were uncovered. The second case history is the new Bank of America Tower …
Soil-Structure Interaction And Uls Design Of Complex Deep Foundations, Rolf Katzenbach, Gregor Bachmann, Christian Gutberlet
Soil-Structure Interaction And Uls Design Of Complex Deep Foundations, Rolf Katzenbach, Gregor Bachmann, Christian Gutberlet
International Conference on Case Histories in Geotechnical Engineering
In conventional design of deep foundations, some important positive effects evolving from the interaction of the bearing elements and the subsoil (Soil-Structure Interaction) are not utilised. These positive effects especially arise when using Combined Pile-Raft Foundations (CPRFs). The application of numerical methods during the design process of such foundations, which is explicitly allowed in Eurocode 7, is capable of regarding these effects. This paper deals with an approach using numerical methods within the ULS design for complex foundations and discusses case histories where CPRFs are used as a foundation for high-rise buildings in Frankfurt am Main. The paper will be …
Case Studies Of Failure Of Cast-In-Situ Piles, A. Verghese Chummar
Case Studies Of Failure Of Cast-In-Situ Piles, A. Verghese Chummar
International Conference on Case Histories in Geotechnical Engineering
The paper deals with case studies of pile failure when cast-in-situ piling systems are adopted. The four commonly used methods of piling are the bailer, direct mud circulation, driven-cast-in-situ and rotary auger system. Failures in each of these cast-in-situ piling systems are discussed based on the failures noted in the initial testing or during execution. The causes for the failure are analyzed and the remedial measures adopted discussed.
Microbiological Improvement Of The Physical Properties Of Soil, Edward Kavazanjian Jr., Ismail Karatas
Microbiological Improvement Of The Physical Properties Of Soil, Edward Kavazanjian Jr., Ismail Karatas
International Conference on Case Histories in Geotechnical Engineering
The application of microbiological processes for improvement of the physical properties of soils offers the promise of sustainable, cost effective, non-disruptive ground improvement for a variety of geotechnical problems. Potentially beneficial applications of microbiological processes include increasing the stiffness of soil to reduce settlement and lateral deformations, increasing shear strength to enhance foundation bearing capacity and slope stability and to facilitate excavation and tunneling, reducing the susceptibility of granular soil to earthquake-induced liquefaction, reducing swell (expansion) potential of fine grained soil, and reducing permeability for groundwater control. Microbiological processes that can potentially be employed for these applications include mineral precipitation, …
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.
Committees, Multiple Members
Committees, Multiple Members
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Application Of Simplified Models To Qualitative Geotechnical Analysis, V. A. Barvashov, P. V. Kharlamov, A. I. Naidenov, S. A. Rytov
Application Of Simplified Models To Qualitative Geotechnical Analysis, V. A. Barvashov, P. V. Kharlamov, A. I. Naidenov, S. A. Rytov
International Conference on Case Histories in Geotechnical Engineering
The paper describes an approach for qualifying soil-structure systems behavior, using simple numeric models – “geotoys”, reflecting the main features of the systems behavior and enabling numeric simulation of various case histories. Three case histories of major karstic sinkholes are analyzed to show that man-made structures above a karstic cavity prevent formation sinkhole. When plastic zones reach the structure periphery, the soil-structure system becomes unstable. Prior settlements could be negligible to serve as precursors. Another soil-footing-superstructure (SFSS) model is a 2D geotoy - an exact mathematical solution, used for multiple simulations (about 10,000) of SFSS sensitivity i.e., response to input …
Effect Of Geometrical Parameters On Nonlinear Soil-Structure Interaction Behavior Of Plane Frame-Soil System, Manjeet Hora, Abhay Sharma
Effect Of Geometrical Parameters On Nonlinear Soil-Structure Interaction Behavior Of Plane Frame-Soil System, Manjeet Hora, Abhay Sharma
International Conference on Case Histories in Geotechnical Engineering
The analysis of soil-structure interaction problem is affected by various structural parameters and behavior of the soil mass. The nonlinear soil behavior plays a vital role in the redistribution of the forces in superstructure. Consequently, the forces in the frame members significantly get altered due to differential settlement of the soil mass. The study of interaction behavior due to these parameters requires the use of finite element method. The physical modeling of the interaction system is achieved by use of variety of elements. The unbounded domain of the soil mass is discretized with coupled finite-infinite elements and proper location of …
Effects Of Cyclic Test In Decreasing Damages To Structures And Roads On Gypsum Soils, Keyhan Sajedi, Bujang B. K. Huat, Jafar Bolouri Bazaz
Effects Of Cyclic Test In Decreasing Damages To Structures And Roads On Gypsum Soils, Keyhan Sajedi, Bujang B. K. Huat, Jafar Bolouri Bazaz
International Conference on Case Histories in Geotechnical Engineering
Fine gypsum soils, when saturated and loaded, because of their high porosity, have large settlements. Compaction of the soil and removal of the load causes the soil to swell. These properties of gypsum soils cause many problems for structures built on them. For instance unsymmetrical settlement, uneven ground floor and cracks in façade are some of the problems. Likewise in road engineering, swelling of this type of soil located under the asphalt after absorbing water is one of it most important problem. So realizing and identifying the behavior of gypsum soils and effort in finding solutions for decreasing the amount …
Heave Problem In Spread Footing In Jordanian Expansive Soil, Omar Hmoud Al-Hattamleh
Heave Problem In Spread Footing In Jordanian Expansive Soil, Omar Hmoud Al-Hattamleh
International Conference on Case Histories in Geotechnical Engineering
Spread footing foundation system is widely used here in Jordan. Cheap cost compare with other foundation type and accumulative practice makes them preferable in the construction industry. Overdesign of such footing and the lack of effective heave prediction lead to an unexpected outcome. Several residences building in Irbid province were suffered from severe crack. Subsequently, owners of these houses are enforced to leave their homes. In this paper a case study of a damaged one-storey reinforced concrete structure presented. The investigation shown that, the spread footings in the damaged part of the structure are over design, while the grade beam …
On Short-Term And Long-Term Behavior Of Large Diameter Above Ground Steel Storage Tanks Founded On Glacial Tills, Dan Dimitriu, C. (Kees) Kooy
On Short-Term And Long-Term Behavior Of Large Diameter Above Ground Steel Storage Tanks Founded On Glacial Tills, Dan Dimitriu, C. (Kees) Kooy
International Conference on Case Histories in Geotechnical Engineering
The paper summarizes settlement records taken over periods of weeks and up to 45 years on above ground steel storage tanks 20 m to 50 m in diameter, 14 m to 20 m high, founded on fine-grained glacial tills. Soil information for each of the tanks is provided from different sources such as conventional boreholes, test pits, and sometimes Dilatometer tests. Three newly constructed tanks have been instrumented with piezometers and a tank base hydraulic profiler for monitoring during hydrotesting. The presented long-term settlements for the older tanks, and the short-term monitoring data collected from the hydrotested tanks are examined …
Parametric Study Of The Response Of Single Pile Under Lateral Loading At The Pile Head, Naemeh Naghavi, Mohammad Hassan Baziar
Parametric Study Of The Response Of Single Pile Under Lateral Loading At The Pile Head, Naemeh Naghavi, Mohammad Hassan Baziar
International Conference on Case Histories in Geotechnical Engineering
This paper presents the findings of numerical studies based on the finite difference method for assessment of single pile behavior under simple dynamic lateral loads. At first, the results of an experimental dynamic lateral load test on a pipe pile driven in to sandy soil are compared with the results of this numerical modeling and some parameters are back calculated. Then piles with different length to diameter ratio, subjected to simple harmonic vibrations (sinusoidal vibrations) with different magnitudes of load and with a range of frequencies, are modeled. The load transferred to the pile and pile head displacement is calculated. …
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 …
The Bearing Capacity Of Cement-Treated Loess: A Case History Of Khon Kaen Loess, Thailand, Pongsakorn Punrattanasin, Watcharin Gasaluck
The Bearing Capacity Of Cement-Treated Loess: A Case History Of Khon Kaen Loess, Thailand, Pongsakorn Punrattanasin, Watcharin Gasaluck
International Conference on Case Histories in Geotechnical Engineering
The loess terrain exists in abundance in the Northeastern region of Thailand. The soil has a potential to collapse which has been caused by wetting. This study reports the characteristics of Khon Kaen loess under various conditions. A case study of foundation damage of building found on this soil is presented. The water supply pipe in front of a three-story building founded on shallow foundations in Khon Kaen University was broken. The loess supporting the foundation at the middle part of the building was soaked and the foundations were severely then settled. Some reinforced concrete beams and columns were investigated …
The Coefficient Of Subgrade Reaction And Its Accuracy On Design Of Foundations, Jamshid Sadrekarimi, Maryam Akbarzad Ghamari
The Coefficient Of Subgrade Reaction And Its Accuracy On Design Of Foundations, Jamshid Sadrekarimi, Maryam Akbarzad Ghamari
International Conference on Case Histories in Geotechnical Engineering
In this paper different methods proposed for determination of ks are discussed, compared and evaluated for their suitability and accuracy. The geotechnical parameters of a site on Tabriz Marl were selected as the base data and settlement analysis results with different methods were compared with that of obtained from analyses with advanced soil models using Safe and Plaxis soft wares. It was disclosed that for Tabriz Marl, soft soil model is the best governing model and Vesic relation among the methods of determination of ks leads to a negligible error in comparison to the soft soil model. Also, in order …