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Articles 1171 - 1200 of 2055
Full-Text Articles in Engineering
Sonic Integrity Test On Piles Founded In Bangkok Subsoil: Signal Characteristics And Their Interpretations, Narong Thasnaipan, Aung Win Maung, Ganeshan Baskaran
Sonic Integrity Test On Piles Founded In Bangkok Subsoil: Signal Characteristics And Their Interpretations, Narong Thasnaipan, Aung Win Maung, Ganeshan Baskaran
International Conference on Case Histories in Geotechnical Engineering
Sonic integrity testing is a common method used to test the integrity of piles in Bangkok. An acoustic technique equipped with computer software, developed by TNo. PDL IFCO, etc. is commonly used to test the piles. This paper presents the signal characteristics and their interpretations from sonic integrity test performed on mainly bored piles varying in length, size, construction method and founded soil strata. Toe reflection of small bored piles (diameter of 0.35m to 0.60m) constructed in Bangkok subsoil can be observed for pile length of up to 20m to 24m. Beyond 35m below the ground, visibility of toe reflection …
Case Histories Of Engineering Vibrations. Paper No. Gr-Iv, George M. S. Manyando, Sanjeev Kumar
Case Histories Of Engineering Vibrations. Paper No. Gr-Iv, George M. S. Manyando, Sanjeev Kumar
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Of Forensic Engineering "Where Things Went Wrong". Paper No. Gr-Viii, Richard Wesley Stephenson
Case Histories Of Forensic Engineering "Where Things Went Wrong". Paper No. Gr-Viii, Richard Wesley Stephenson
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Of Geological, Rock And Mining Engineering Including Underground Structures And Excavations. Paper No. Gr-Vi, Christopher G. Mueller, M. Kavvadas, Baoshan Huang
Case Histories Of Geological, Rock And Mining Engineering Including Underground Structures And Excavations. Paper No. Gr-Vi, Christopher G. Mueller, M. Kavvadas, Baoshan Huang
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Of Geotechnical And Hydrological Management And Remediation Of Solid, Hazardous And Low-Level Radioactive Wastes, Including Liner Cover Systems. Paper No. Gr-X, Carsten H. Floess, Mary C. Lamie, Wayne R. Bergstrom
Case Histories Of Geotechnical And Hydrological Management And Remediation Of Solid, Hazardous And Low-Level Radioactive Wastes, Including Liner Cover Systems. Paper No. Gr-X, Carsten H. Floess, Mary C. Lamie, Wayne R. Bergstrom
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Of Geotechnical Earthquake Engineering. Paper No. Gr-Iii, Ahmed-W. Elgamal, Marshall Lew
Case Histories Of Geotechnical Earthquake Engineering. Paper No. Gr-Iii, Ahmed-W. Elgamal, Marshall Lew
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Of New Solutions To Traditional Geotechnical Problems. Paper No. Gr-Ix, Vijay K. Puri, Tom Blackburn, John M. Benson
Case Histories Of New Solutions To Traditional Geotechnical Problems. Paper No. Gr-Ix, Vijay K. Puri, Tom Blackburn, John M. Benson
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Of Retaining Structures And Deep Excavations. Paper No. Gr-V, Raj V. Siddharthan, Arni E. Rafnsson
Case Histories Of Retaining Structures And Deep Excavations. Paper No. Gr-V, Raj V. Siddharthan, Arni E. Rafnsson
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case Histories Of Slopes, Dams, And Embankments. Paper No. Gr-Ii, Vlad G. Perlea, Mary P. Perlea, Bujang B. K. Huat
Case Histories Of Slopes, Dams, And Embankments. Paper No. Gr-Ii, Vlad G. Perlea, Mary P. Perlea, Bujang B. K. Huat
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Geotechnical And Geologic Features Of U.S. 189 In Provo Canyon, Utah, Thomas S. Lee, Steven H. Brandon
Geotechnical And Geologic Features Of U.S. 189 In Provo Canyon, Utah, Thomas S. Lee, Steven H. Brandon
International Conference on Case Histories in Geotechnical Engineering
Provo Canyon, located in north central Utah, is known to have landslide hazards for many years. Construction to widen and straighten a 2.5-mile-long section of U.S. 189 known as the “Narrows” commenced in December 1995. This project consists of twin 300-foot-long two-lane tunnels, 3/4 million cubic yards of soil and rock excavation, 60,000 square feet of cast-in-place concrete soil nailed walls, and 90,790 square feet of mechanically stabilized embankment. During excavation for some of the cuts, landslides occurred that required remediation. Cracks were noticed near the northern portal of the tunnels which necessitated immediate stabilization. Observations during construction are presented. …
Experiences Of The Support Designs In The Two Large Underground Openings In India, R. K. Goel, J. L. Jethwa, A. K. Dube
Experiences Of The Support Designs In The Two Large Underground Openings In India, R. K. Goel, J. L. Jethwa, A. K. Dube
International Conference on Case Histories in Geotechnical Engineering
Support requirements for two caverns arc worked out by empirical and the numerical approaches. The adequacy of the shotcrete-rock bolt support system is monitored by measuring the deformations of caverns walls and roof. The measurements are compared with the results obtained from the numerical approach. Brief geology, the supports, and the results of performance monitoring are presented in the paper.
Investigation Of The Influence Of The Clay Seams Around An Underground Excavation In Rock Salt, S. Kwon, John W. Wilson
Investigation Of The Influence Of The Clay Seams Around An Underground Excavation In Rock Salt, S. Kwon, John W. Wilson
International Conference on Case Histories in Geotechnical Engineering
The presence of clay seams in the roof is especially important for assessing the stability of the excavations in salt and potash mines, since they allow separation as well as horizontal slip. The deformational behavior at clay seams in the roof of excavations was investigated by using actual field measurements made at the Waste Isolation Pilot Plant (WlPP) site. From the in situ deformation measurements, the separation and separation rate across the clay seams in the roof and floor could be estimated by using the technique developed in this study. The horizontal displacement along the clay seams was determined from …
Tension Tests On Drilled Micropiles In A Stiff Clay, Alan J. Lutenegger, Gerald A. Miller
Tension Tests On Drilled Micropiles In A Stiff Clay, Alan J. Lutenegger, Gerald A. Miller
International Conference on Case Histories in Geotechnical Engineering
A series of 20 small diameter drilled and grouted micropiles were installed at three different depths in a stiff surficial clay crust at the National Geotechnical Experimentation Site in Amherst, Massachusetts. A detailed site characterization program was performed to evaluate· the soil characteristics in the crust. Three different sizes of micropiles ranging in diameter from 76 mm to 152 mm and having lengths from 1.52 m to 4.57 m were installed vertically at the site using both continuous flight augers and hand auger techniques. Concrete was placed in the open holes using gravity free-tall. After allowing the concrete to cure …
Case Histories Of Damaging Earthquakes, Walter W. Hays
Case Histories Of Damaging Earthquakes, Walter W. Hays
International Conference on Case Histories in Geotechnical Engineering
This paper contains illustrative case histories of the principal "forensic lessons" learned from multidisciplinary postearthquake investigations [United States Geological Survey, 1993] of damaging earthquakes throughout the world. Since 1980, the most notable earthquakes include those that struck Kobe, Japan in 1995, Northridge, California in 1994, Hokkaido-Nansei-Oki, Japan and Khalari, India in 1993, Landers, California and Erzincan, Turkey in 1992, Costa Rica in 1991, the Philippines in 1990, Lorna Prieta, California in 1989, Spitak, Armenia in 1988, Mexico in 1985, and El Asnam, Algeria and Irpinia, Italy in 1980. Individually and collectively, these earthquakes have served as scientific laboratories to show …
Case Histories For Settlement Analysis In Ground Improved By Vertical Drain, Takaharu Shogaki, Hayato Moro, Minoru Matsuo
Case Histories For Settlement Analysis In Ground Improved By Vertical Drain, Takaharu Shogaki, Hayato Moro, Minoru Matsuo
International Conference on Case Histories in Geotechnical Engineering
The effects of anisotropy and sample disturbance on the consolidation parameters were investigated through laboratory testing, and the degree of sample disturbance on the consolidation parameters in the periphery of the drain is evaluated. A new method for settlement analysis, taking into consideration both sample disturbance and the retardation of the consolidation in the ground improved by vertical drain, is proposed. The effects of anisotropy and sample disturbance on the consolidation parameters in the ground improved by vertical drain are given as the function of the distance from the boundary of drain. In the undisturbed zone, the ratio of the …
Geotechnical Risk And Reliability From Theory To Practice, Lenka S. Timiovska
Geotechnical Risk And Reliability From Theory To Practice, Lenka S. Timiovska
International Conference on Case Histories in Geotechnical Engineering
Indeterminate combined with evaluating the safety of existing lifeline systems are, large and here one would expect format risk and reliability techniques to have found their most urgent need. Besides, risk analysis has languished in safety practice, is only now beginning to appear in established safety programs in my country. It is of interest to explore the reasons why this has been so, and to point the way to the adaptations that are necessary if risk analysis is to assume its deserved role in life-line systems and related areas of geotechnical practice. This paper has proposed that geotechnical conditions are …
Identification Of Potential Seepage Locations Along The Herbert Hoover Dike, Lake Okeechobee Fl., By Electromagnetic Geophysical Method. Prediction And Confirmation., Anthony L. Dipiero, Robert Ross, Samuel R. Honeycutt, Richard D. Lewis
Identification Of Potential Seepage Locations Along The Herbert Hoover Dike, Lake Okeechobee Fl., By Electromagnetic Geophysical Method. Prediction And Confirmation., Anthony L. Dipiero, Robert Ross, Samuel R. Honeycutt, Richard D. Lewis
International Conference on Case Histories in Geotechnical Engineering
This case history demonstrates the use of electromagnetic (EM) induction methods to examine known seepage locations and then predict future ones along the Herbert Hoover Dike (HHD) in south central Florida. The HHD forms an embankment dam 20 to 30 feet high and 140 miles long surrounding Lake Okeechobee. Approximately 26 miles of embankment was surveyed with EM induction. The objective of the EM survey was to identify active and potential foundation seepage locations and conduits. Areas of greater conductivity were often associated with seepage locations observed during a record high water event in October, 1995. These problems included boils …
Procedure To Predict Settlement Of Solid Waste Landfills Using Power Creep Law, Sanjeev Kumar
Procedure To Predict Settlement Of Solid Waste Landfills Using Power Creep Law, Sanjeev Kumar
International Conference on Case Histories in Geotechnical Engineering
Settlement prediction of solid waste landfills is important for their post-closure operation. Estimation of settlement of refuse is complex because of the mechanism of settlement and heterogeneity of the refuse. Several methods are available to predict the settlement of solid waste landfills. Based on the analysis of published measured data of four landfills, a unique relationship was recently developed between reference compressibility and rate of compression to predict refuse settlement using Power Creep Law. A step-by-step procedure is proposed to predict refuse settlement by using the Power Creep Law at a site for which the data from laboratory or field …
Toward Earthquake Resilient Cities In The 21st Century: Reduction Of Community Vulnerability, Walter W. Hays
Toward Earthquake Resilient Cities In The 21st Century: Reduction Of Community Vulnerability, Walter W. Hays
International Conference on Case Histories in Geotechnical Engineering
The focus of this paper is on earthquakes and earthquake-resilient communities in the United States. The paper describes what we have learned from the International Decade for Natural Disaster Reduction (IDNDR) and how we can build upon these experiences as we continue working toward the worldwide goal of natural-hazard-resilient cities in the 21st century.
Conference Program, Shamsher Prakash
Conference Program, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Foundation Damage Of Structures In Kobe And Remediation, Tamotsu Matsui
Foundation Damage Of Structures In Kobe And Remediation, Tamotsu Matsui
International Conference on Case Histories in Geotechnical Engineering
In this paper, foundation damage of structures in the 1995 Hyogoken-Nambu Earthquake was overviewed, mainly focusing on that of bridges and elevated highways, port and harbor facilities and buildings. Then, the remediation methods and works for damaged foundations were summarized, together with illustrating some examples. Finally, essentials of related subjects and suggestions on seismic design and remediation for foundations of structures were summarized for a further study.
Keynote Lecture: "Creating Case Histories The Hard Way", Ralph B. Peck
Keynote Lecture: "Creating Case Histories The Hard Way", Ralph B. Peck
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Measurement And Analysis Of Civil Engineering Vibrations, Jean-Lou Chameau, Glenn J. Rix, Laurel Empie
Measurement And Analysis Of Civil Engineering Vibrations, Jean-Lou Chameau, Glenn J. Rix, Laurel Empie
International Conference on Case Histories in Geotechnical Engineering
Man-made vibrations caused by construction activities, blasting, rail and vehicular traffic, and machinery can have an adverse impact on buildings and facilities, human occupants of buildings, and sensitive equipment housed within these facilities. Comparisons between vibrations are often difficult because of different methods used to measure, analyze, and interpret vibration data. To facilitate these comparisons, standard methods of selecting and mounting transducers, processing vibration data, and interpreting test results are reviewed. Specific measurement and analysis techniques and maximum allowable vibration criteria used for evaluating the influence of vibrations on humans, the potential for cosmetic damage to structures, and the impact …
Design And Construction Of The Seattle Symphony's Benaroya Hall Above An Old Railroad Tunnel, Carole L. B. Mitchell
Design And Construction Of The Seattle Symphony's Benaroya Hall Above An Old Railroad Tunnel, Carole L. B. Mitchell
International Conference on Case Histories in Geotechnical Engineering
Benaroya Hall, the new home of the Seattle Symphony, is located directly over an old railroad tunnel in downtown Seattle. The railroad tunnel was hand excavated in the early 1900s; the tunnel excavation caused considerable settlement of the buildings and streets above. The tunneling disturbance and subsequent rotting of timber supports resulted in numerous voids in the vicinity of the tunnel. Excavation for the Benaroya Hall removed up to 55 feet of soil overburden and came to within 12 feet of the tunnel crown. The foundations for the symphony hall were required to protect the railroad tunnel from carrying symphony …
Failure Of Buildings On Mound ̶ A Case Study, U. N. Sinha
Failure Of Buildings On Mound ̶ A Case Study, U. N. Sinha
International Conference on Case Histories in Geotechnical Engineering
The century old buildings situated on mound at Jais town, Rae Bareli (Uttar Pradesh), India, failed after heavy rainfall. The paper presents the convincing evidence of the failure or buildings through photographs. The prime cause of failures and suggestions are also reported.
A Follow-Up Of Two Different Foundation Principles, Sven Hansbo, Leif Jendeby
A Follow-Up Of Two Different Foundation Principles, Sven Hansbo, Leif Jendeby
International Conference on Case Histories in Geotechnical Engineering
In a special lecture held by the senior author at the Int. Conf. on Case Histories in Geotechnical Engineering in St. Louis (Hansbo, 1984) a follow-up was presented of the observations on two nearby buildings founded on deep deposits of soft clay according to different foundation principles. In one case the total load of the building is carried by friction piles with a factor of safety against failure equal to 3 while, in the other case, the load is partly carried by contact pressure at the raft/soil interface and partly by friction piles with a design load equal to creep …
Heavy Crane Foundations On Soft Clay, John R. Davie, Kenneth R. Bell, Mark B. Fitzsimmons, Daniel A. Haggerty
Heavy Crane Foundations On Soft Clay, John R. Davie, Kenneth R. Bell, Mark B. Fitzsimmons, Daniel A. Haggerty
International Conference on Case Histories in Geotechnical Engineering
A very large mobile crane was used to lift a 3,150 kN steam generator through the roof of the containment building of a nuclear power plant. The maximum load on the crane was 19.8 MN, giving a track pressure of almost 600 kPa. Soil conditions were stiff clay underlain by softer clay. This paper describes the bearing capacity and settlement analysis performed to establish a suitable shallow foundation for the crane. The foundation load test confirmed that soil conditions had been adequately defined and that the foundation design was satisfactory.
Shallow Foundations On A Diagenetic Limestone Formation In Qatar, W. Akili, Robert M. Jackson
Shallow Foundations On A Diagenetic Limestone Formation In Qatar, W. Akili, Robert M. Jackson
International Conference on Case Histories in Geotechnical Engineering
The near surface limestones in Qatar have complex lithologies and have experienced diagenetic changes after deposition. A variety of weak limestones have been encountered in combination with matrix material (rock fragments and secondary fraction). The matrix, often clayey, sometimes cemented with gypsum, anhydrite or calcite grains, is not a rock nor does it qualify as a soil. These materials are: (i) difficult to sample in the undisturbed state. (ii) extremely variable m composition and proprieties, and (iii) appear susceptible to degradation, particularly when wet. This paper presents geotechnical information from selected sites where these materials (diagenetic limestone) have been encountered. …
Grouting In Consideration Of Predominant Direction Of Joints In Rock Masses, Masaki Kawasaki, Hitoshi Yoshida, Yoshikazu Yamaguchi
Grouting In Consideration Of Predominant Direction Of Joints In Rock Masses, Masaki Kawasaki, Hitoshi Yoshida, Yoshikazu Yamaguchi
International Conference on Case Histories in Geotechnical Engineering
We conducted a grouting test in rock mass having steep joints with predominant direction, assuming blanket grouting for embankment dams. Vertical holes and inclined holes designed in consideration of the predominant direction of the joints were used as grouting holes, and the hole spacing was determined such that the number of grouting holes per unit area on a joint was the same for both cases. As a result, both tests saw a similar improvement despite the fact that the test using inclined holes had wider hole spacing than the test using vertical holes on the ground surface. We can also …
Natural Slope Failure On Weathered Andesitic Breccia In Samigaluh Area, Indonesia, Dwikorita Karnawati
Natural Slope Failure On Weathered Andesitic Breccia In Samigaluh Area, Indonesia, Dwikorita Karnawati
International Conference on Case Histories in Geotechnical Engineering
Six events of landslides occurred simultaneously on weathered Andesitic Breccia in Samigaluh Area, following the heavy rainfall. Field investigation, laboratory works and slope stability analysis were carried out to assess the mechanism of the failures, their controlling factor and identify the triggering rainfall characteristics. It was found that the rainfall was the key factor inducing the failure. However, further investigation which incorporates slope hydrodynamic numerical modeling is still required, in order to find the triggering rainfall characteristics. In addition, the role of slope inclination was less significant than the soil and vegetation types covering the slopes. Finally, the landslide susceptibility …