Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Missouri University of Science and Technology

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 22561 - 22590 of 33708

Full-Text Articles in Entire DC Network

Tribeca Tower Foundation System, Jacek K. Leznicki, Robert G. Gaibrois, Melvin L. Esrig Jun 1993

Tribeca Tower Foundation System, Jacek K. Leznicki, Robert G. Gaibrois, Melvin L. Esrig

International Conference on Case Histories in Geotechnical Engineering

This paper describes the construction of the foundation system for a 52-story apartment building between Duane Street and Thomas Street (the Tribeca Tower) in the City of New York and the design and implementation of a protection program for a 130-year old designated landmark building founded on a stone "rubble" wall foundation adjacent to the Tribeca Tower.

Go to article

Uplift Load Tests On Driven Piles, J. R. Davie, M. R. Lewis, L. W. Young Jun 1993

Uplift Load Tests On Driven Piles, J. R. Davie, M. R. Lewis, L. W. Young

International Conference on Case Histories in Geotechnical Engineering

Details and results of uplift load tests on 25 piles at 15 sites are presented. The allowable uplift load on each pile determined from the BOCA code criterion is compared with an allowable capacity based on small movements at design load. In the majority of cases, the BOCA capacities are significantly lower.

Go to article

Variation In Capacities Of Different Pile Types Under Similar Soil Conditions, H. Senapathy, J. R. Davie, M. R. Lewis Jun 1993

Variation In Capacities Of Different Pile Types Under Similar Soil Conditions, H. Senapathy, J. R. Davie, M. R. Lewis

International Conference on Case Histories in Geotechnical Engineering

The interaction between soil and various pile types is of interest because it depends not only on the shear strength characteristics of the soil, but also on the pile dimensions, shape, and installation method, and on time after pile installation. This paper presents load test results from three types of displacement piles installed at the same site. The results obtained from the tests are compared with theoretical estimates. The computed values of soil-pile adhesion, back-calculated from the load tests, are discussed and compared with values found in the literature. Estimated pile capacities during driving and retap are also compared and …

Go to article

Case History Of An Uplift Problem, J. R. Deutekom, R. J. Termaat Jun 1993

Case History Of An Uplift Problem, J. R. Deutekom, R. J. Termaat

International Conference on Case Histories in Geotechnical Engineering

Deformation and related stability problems of dikes in the western parts of Holland were for many years ascribed to creep and excess pore water pressures only. However in the spring of 1988 during a high water period in the river Rhine the so called uplift mechanism was for the first time measured in practice. It was then recognised that in some cases the problems have been caused by the uplift phenomenon. For a few years the pore water pressures and the deformations were observed in a test site. With the results of the observations a procedure was formulated for design …

Go to article

Distress In Hirakud Dam, Orissa, India – Possible Causes And Remedial Measures, B. Ramachandran Jun 1993

Distress In Hirakud Dam, Orissa, India – Possible Causes And Remedial Measures, B. Ramachandran

International Conference on Case Histories in Geotechnical Engineering

Distress has been observed in the above dam, on its right spillway immediately after its completion in 1957. The distress has been intensified in the eighties with development of thin horizontal cracks in the undersluice barrels, gate gallery and adjoining areas at a level 18m above bed. These have all been chiselled, opened up and epoxy grouted; besides with water proof cement. But parallel cracks opened up soon after. Studies in detail carried out by various government organisations point out that rapid placement of concrete in ’55 - ‘56 leading to thermal stress is the main cause. Though some attribute …

Go to article

Foundations For Large Embankments, F. Colleselli, G. Cortellazzo Jun 1993

Foundations For Large Embankments, F. Colleselli, G. Cortellazzo

International Conference on Case Histories in Geotechnical Engineering

This report deals with problems connected with the design and construction of two levees built on thick soft compressible soils in the Po Delta. Settlement and pore pressure measurements in foundation soils, taken for about four years during and after construction by means of complete geotechnical instrumentation, were compared with results obtained through various methods during both design and back-analysis phases. Back-analysis was carried out using numerical simulations with finite-element programs. Considerations of the problems of the global stability of the embankments during the various construction phases are also presented.

Go to article

Geotechnical Problems Of Dam Sites And Their Solution With Reference To The Projects Of Eastern India, S. Gangopadhyay Jun 1993

Geotechnical Problems Of Dam Sites And Their Solution With Reference To The Projects Of Eastern India, S. Gangopadhyay

International Conference on Case Histories in Geotechnical Engineering

Geotechnical problems of dam construction are associated with adverse geological conditions of the dam site like soft rock, fault, shear zone, joints, weathering, permeable bouldery deposit, soluble rocks, ancient slide etc. In many of the dam sites of eastern India where one or more of such adverse conditions exist, the dam could be safely constructed by treatment of foundation defects. In some cases, however, a new site with less geologic problem was chosen with consequent modification in the project scheme.

Go to article

Ground Anchors Stabilize Highway Bridge Abutments, N. H. Wade, G. W. Davies Jun 1993

Ground Anchors Stabilize Highway Bridge Abutments, N. H. Wade, G. W. Davies

International Conference on Case Histories in Geotechnical Engineering

Calgary's Glenmore Causeway, constructed in 1962 across the Elbow River, consists of an earthfill embankment with a waterway spanned by a 43 m long bridge, the abutments of which are supported on spread footings founded in the embankment fill. Between the 25 m deep sand and gravel embankment fill and the sub-horizontal bedrock surface is a compressible clay layer up to 5 m thick. To improve abutment stability during peak river flows, 126 post-tensioned Dywidag ground anchors up to 60 m long were installed through the concrete slabs armouring the abutment slopes. Twenty-two anchors were terminated in the embankment fill …

Go to article

Landslide Management And Control In Himalayas, P. Jagannatha Rao Jun 1993

Landslide Management And Control In Himalayas, P. Jagannatha Rao

International Conference on Case Histories in Geotechnical Engineering

The Himalayan ranges experience intense mass movements, culminating in a large number of landsl1des every year. The road system in Himalayas is especially vulnerable to the landslide hazard. A number of techniques have been used in practice to manage and control landslides in these areas. The present paper deals with experiences gained in this regard. A few case histories are presented in the paper, wherein landslides have been successfully managed by appropriate techniques. These concern mainly (i) the use of hazard zonation techniques for solving chronic landslide problems by rationally identifying a stable alternate route and (ii) effective and economical …

Go to article

Pile Embankment On Soft Clay: Comparison Between Model And Field Performance, Bujang B. K. Huat, Faisal Hj. Ali Jun 1993

Pile Embankment On Soft Clay: Comparison Between Model And Field Performance, Bujang B. K. Huat, Faisal Hj. Ali

International Conference on Case Histories in Geotechnical Engineering

The paper describes the performance of a full scale pile embankment on soft clay foundation which has been built and instrumented in Malaysia. Reference is made to a parallel design study carried out using centrifuge modelling technique.

Go to article

Seepage Through Mine Tailings Dams, D. C. Cowherd, K. C. Miller, V. G. Perlea Jun 1993

Seepage Through Mine Tailings Dams, D. C. Cowherd, K. C. Miller, V. G. Perlea

International Conference on Case Histories in Geotechnical Engineering

A determination of the phreatic surface in dams constructed of coal refuse, under the criteria set forth in the National Dam Safety Act was made. All of these dams were over 20 years old. Most of the embankments studied were not constructed with any compaction specification and no effort was made to compact the coal refuse. A comparison of actual phreatic surface to the theoretically predicted surface is made using the classical seepage theory and the computer program SEEP. The embankments are old enough to present the steady slope phreatic surface, and thus, provide a good check of the ability …

Go to article

Smw Wall For Seepage Control In Levee Reconstruction, D. S. Yang, U. Luscher, I. Kimoto, S. Takeshima Jun 1993

Smw Wall For Seepage Control In Levee Reconstruction, D. S. Yang, U. Luscher, I. Kimoto, S. Takeshima

International Conference on Case Histories in Geotechnical Engineering

An SMW wall was installed as a cutoff wall for seepage control during high floods in a narrow levee constructed in the early 1900's using sandy soils. After part of the wall was installed, difficulties were encountered in evaluating the permeability of the as-built cutoff wall according to the project specifications. Methods used to evaluate the permeability of the cutoff wall included laboratory tests on bulk samples and core samples and in-situ permeability tests. Significant differences in test results were caused by various sample preparation and handling procedures, sampling disturbance, and different testing methods. The difficulties were resolved by performing …

Go to article

Stabilization Of A Tailings Dam By De-Watering, A. B. Fourie, G. I. Mcphail Jun 1993

Stabilization Of A Tailings Dam By De-Watering, A. B. Fourie, G. I. Mcphail

International Conference on Case Histories in Geotechnical Engineering

The failure of the outer slope of one of the paddocks of a tailings dam, resulted in a significant decrease in the area available for tailings deposition. Overloading of the remaining five paddocks resulted. To maintain the stability of the existing dam whilst construction of new disposal facilities was in progress, three techniques were investigated; horizontal, push-in drains at the dam toe, a rock buttress around the operational paddocks, and vertical de-watering wells installed on the first terrace, or ‘step-back’ of the dam. De-watering wells proved most effective, and 165 wells were installed. A monitoring programme included regular determination of …

Go to article

Moisture And Mineralogy Aspect Of Clayey Materials, Sanga Tangchawal Jun 1993

Moisture And Mineralogy Aspect Of Clayey Materials, Sanga Tangchawal

International Conference on Case Histories in Geotechnical Engineering

Problems of clayey mass stability are mainly due to swelling behavior and strength reduction of clayey soils and rocks. Laboratory measurements were carried out on various clayey materials to obtain their engineering properties related with the performance of clays in nature. The author demonstrated statistical relationships among material index and material properties. Review of geotechnical mechanisms concerning moisture and mineralogy effects was also given.

Go to article

Session 2 Concluding Remarks, Pedro S. Sêco E Pinto Jun 1993

Session 2 Concluding Remarks, Pedro S. Sêco E Pinto

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Go to article

General Report Session No. 3: Case Histories Of Geotechnical Earthquake Engineering, Steven L. Kramer, Peter K. Robertson Jun 1993

General Report Session No. 3: Case Histories Of Geotechnical Earthquake Engineering, Steven L. Kramer, Peter K. Robertson

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Go to article

Comparison Between Finite Element Predictions And Results From Dynamic Centrifuge Tests On Tilting Gravity Wall Retaining Dry Sand, A. S. Al-Homoud, R. V. Whitman Jun 1993

Comparison Between Finite Element Predictions And Results From Dynamic Centrifuge Tests On Tilting Gravity Wall Retaining Dry Sand, A. S. Al-Homoud, R. V. Whitman

International Conference on Case Histories in Geotechnical Engineering

An analytical model is developed to analyze the seismic response of gravity walls retaining and founded on dry sand, with special emphasis on tilting behavior. A well verified two-dimensional finite element code is used for this purpose. The analytical model is verified comparing predictions to results from three dynamic centrifuge tests, with satisfactory agreement. Moreover, sensitivity analyses are carried out for one of the centrifuge test conditions to understand how the results would change if the boundary conditions and rotational stiffness of the wall were changed.

Go to article

Earthquake Response Of 30-Story Building During The Loma Prieta Earthquake, T. Kagawa, M. A. Al-Khatib Jun 1993

Earthquake Response Of 30-Story Building During The Loma Prieta Earthquake, T. Kagawa, M. A. Al-Khatib

International Conference on Case Histories in Geotechnical Engineering

A 30 story building supported by 828 piles had been subjected to the Loma Prieta earthquake in 1989. The building was heavily instrumented by strong-motion devices. This study analyzed and compared computed and recorded responses of the building by using the state-of-the-art techniques for dynamic pile-group interaction. Computed results were in good agreement with recorded ones.

Go to article

Earthquake-Induced Parameter Automation, Gregory L. Hempen, James L. Keim, James L. Mayo Jun 1993

Earthquake-Induced Parameter Automation, Gregory L. Hempen, James L. Keim, James L. Mayo

International Conference on Case Histories in Geotechnical Engineering

An operating automated system has been developed for Wappapello Dam. The system allows periodic reading of foundation pore pressure sensors. Upon sensing strong ground shaking the system reads rock and foundation triaxial acceleration. The acceleration readings cause the system to collect pore pressure rise in a loose, saturated sand. The data is available over telephone lines in real time. In addition to reducing maintenance piezometer reading labor, the automation performs earthquake triggering notification and remote data evaluation. The engineering use for dam safety review is considered invaluable.

Go to article

Evaluation Of Liquefaction Potential Of Coal Slurry, D. C. Cowherd, K. C. Miller, V. G. Perlea, Shamsher Prakash Jun 1993

Evaluation Of Liquefaction Potential Of Coal Slurry, D. C. Cowherd, K. C. Miller, V. G. Perlea, Shamsher Prakash

International Conference on Case Histories in Geotechnical Engineering

Hundreds of coal refuse impoundments are constructed each year to dispose of coarse and fine coal refuse. As the need for more sites develops, the suitability of available sites decreases. This creates the need for alternative construction practices such as upstream tailings dam construction methods. These methods raise the question of how to analyze the seismic and liquefaction stability of these structures. The use of down hole nuclear density and moisture probes provides a reliable method for assessing the potential stability issues for these types of structures.

Go to article

Ground Waving And Its Damaging Effect, John G. Z. Q. Wang Jun 1993

Ground Waving And Its Damaging Effect, John G. Z. Q. Wang

International Conference on Case Histories in Geotechnical Engineering

Some unusual patterns of earthquake damages due to ground waving have been described in order to draw attention to further research towards these problems. A brief introduction of relevant theoretical approach to torsional components of ground motion and amplification of seismic surface waves due to local topographic irregularities have been given in this paper to provide a contrast between theoretical approach and practical cases in order to reflect the gap to be filled.

Go to article

Jet Grouting To Reduce Liquefaction Potential, K. W. Tsai, C. K. Chou, J. C. Chang, W. H. Wang Jun 1993

Jet Grouting To Reduce Liquefaction Potential, K. W. Tsai, C. K. Chou, J. C. Chang, W. H. Wang

International Conference on Case Histories in Geotechnical Engineering

A compaction sand piling technique was abandoned after it caused excessive vibrations in buildings adjacent to the construction site. Various alternatives were evaluated, but none could provide certainty of acceptance by the residential community without causing schedule delay and other construction complications. A vibration-free jet grouting method was, therefore adopted for ground improvement to reduce liquefaction potential at the site. Modifications in grouting procedure details were implemented to overcome problems caused by the site conditions.

Go to article

Liquefaction Case Histories From 1990 Manjil, Iran, Earthquake, M. K. Yegian, M. A. A. Nogole-Sadat, V. G. Ghahraman, H. Darai Jun 1993

Liquefaction Case Histories From 1990 Manjil, Iran, Earthquake, M. K. Yegian, M. A. A. Nogole-Sadat, V. G. Ghahraman, H. Darai

International Conference on Case Histories in Geotechnical Engineering

The Manjil, Iran, earthquake caused extensive liquefaction and liquefaction-induced damage to residential, commercial and public structures. This paper presents liquefaction case histories as well as the results from our analysis of the data. Based on the field observations made in Iran, liquefaction strength of clean sands for Ms=7.7 is established. The resulting liquefaction resistance versus density relationship is compared with the results published by Seed et al. (1983).

Go to article

Macrozonation Of Landslides For The Manjil, Iran 1990 Earthquake, M. Zaré Jun 1993

Macrozonation Of Landslides For The Manjil, Iran 1990 Earthquake, M. Zaré

International Conference on Case Histories in Geotechnical Engineering

The macrozonation and classification studies are carried out for the induced landslides in the imprinted area of the Manjil, Iran earthquake of 20 June 1990, in view point of engineering geology. The earthquake induced landslides are classified in 7 classes and all of them are mapped on the seismotectonic map of the region. Landslides of the historic time are considered as well. These studies showed that the most of large earthquake induced landslides are occurred within the earthquake origin zone of this earthquake and in the area which is specified with the earthquake intensity of more than VII (7) MSK. …

Go to article

Response Of Two Dams In The 1987 Whittier Narrows Earthquake, R. W. Boulanger, J. D. Bray, R. B. Seed Jun 1993

Response Of Two Dams In The 1987 Whittier Narrows Earthquake, R. W. Boulanger, J. D. Bray, R. B. Seed

International Conference on Case Histories in Geotechnical Engineering

The 1987 Whittier Narrows earthquake (ML = 5.9) shook two dams, the Puddingstone and Cogswell dams, which were instrumented as part of the California Strong Motion Instrumentation Program (CSMIP). The resulting recorded accelerograms provided a valuable opportunity to investigate and evaluate the accuracy and reliability of conventional geotechnical procedures for evaluation of dynamic response characteristics of earth and rockfill dams. This paper presents the results of these studies, which provide insight regarding current techniques for dynamic soil property evaluation and the applicability of one- and two-dimensional analytical procedures to evaluation of the dynamic response of these types of dams.

Go to article

Mitigation Of Seismically Induced Slope Movement, Craig S. Shields, Frank L. Rollo Jun 1993

Mitigation Of Seismically Induced Slope Movement, Craig S. Shields, Frank L. Rollo

International Conference on Case Histories in Geotechnical Engineering

Ground shaking during the Lorna Prieta earthquake of 17 October 1989 caused permanent lateral and vertical displacements of a steep hillside in San Francisco, California. These displacements damaged 36 residences along the top of the hillside. Subsequent exploration and analyses indicated the hillside is composed of loose to medium-dense Dune sand that is marginally stable under static conditions, but highly susceptible to ·movements during ground shaking caused by earthquakes. A retaining system consisting of a combination of drilled soldier piles and permanent tiebacks was designed and constructed to mitigate the potential for future seismically induced slope movement. This paper describes …

Go to article

Past Proceedings: Third International Conference On Case Histories In Geotechnical Engineering, St. Louis (1993), Multiple Authors Jun 1993

Past Proceedings: Third International Conference On Case Histories In Geotechnical Engineering, St. Louis (1993), Multiple Authors

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

No abstract provided.

Go to article

Discussions And Replies Session 5, Shamsher Prakash, J. N. Gómez, Eyjolfur Arni Rafnsson, Roy E. Olson Jun 1993

Discussions And Replies Session 5, Shamsher Prakash, J. N. Gómez, Eyjolfur Arni Rafnsson, Roy E. Olson

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Go to article

Cut And Cover At Landrückentunnel North, R. Pöttler Jun 1993

Cut And Cover At Landrückentunnel North, R. Pöttler

International Conference on Case Histories in Geotechnical Engineering

The paper deals with a tunnel structure which has been designed in a very economic way, taking account of best estimate ground parameters and high sophisticated numerical models for simulating the reinforced concrete behaviour. Some changes were made during construction of the tunnel, to speed up the construction procedure. During the backfill of the tunnel higher displacements than calculated occurred.

Go to article

Failure Of A Twenty-Foot High Retaining Wall, R. E. Olson Jun 1993

Failure Of A Twenty-Foot High Retaining Wall, R. E. Olson

International Conference on Case Histories in Geotechnical Engineering

A cantilever retaining wall, designed in apparent accord with provisions in a civil engineering handbook, failed soon after construction. Analyses of the causes of the failure are presented.

Go to article

First Prev Next Last