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1993

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Articles 601 - 630 of 1343

Full-Text Articles in Engineering

The Forest City Landslide, R. E. Hunt, S. M. Miller, V. L. Bump Jun 1993

The Forest City Landslide, R. E. Hunt, S. M. Miller, V. L. Bump

International Conference on Case Histories in Geotechnical Engineering

A large and complex landslide in marine shales is impacting the approach roadway and a 4600-ft long bridge carrying U.S. Route 212 over the Oahe Reservoir at Forest City, South Dakota. After extensive investigation and analyses it was determined that the main landslide could be remediated by unloading the slide using a large cut through the escarpment located upslope from the bridge. Although moving with the main slide, the 900- foot long approach embankment is failing in directions differing from the main slide. Preliminary study indicates that the independent slides within the approach embankment can be stabilized by stone columns …

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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.

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Uplift Capacity Of Driven Piles From Static Loading Tests, M. H. Hussein, J. M. Sheahan Jun 1993

Uplift Capacity Of Driven Piles From Static Loading Tests, M. H. Hussein, J. M. Sheahan

International Conference on Case Histories in Geotechnical Engineering

A pile driving and testing program was undertaken to evaluate installation procedures, assess capacity (particularly in uplift) of 24- and 30-inch square, prestressed concrete piles, and provide foundation design parameters for the New Edison Bridge project in Fort Myers, Florida. The subsurface profile generally consisted of three major soil strata: an upper clayey sand and sandy clay layer to a depth of about 45 to 50 feet below mudline, a medium dense to dense silty sand middle layer about 10 feet thick, and a third layer of dense to very dense silty fine sand. Eleven prestressed concrete test piles of …

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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.

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Foundations Of New York Naval Base Sima Building, C. C. Chang, R. L. Kanthan Jun 1993

Foundations Of New York Naval Base Sima Building, C. C. Chang, R. L. Kanthan

International Conference on Case Histories in Geotechnical Engineering

This paper illustrates an exhaustive geotechnical effort to accompany the design and construction of the foundations of the SIMA Building of the United States Naval Shore Support Facility on Staten Island, New York.

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Ground Failure And Remedial Measures At A Block Of Flats, I. Stanculescu, A. Chirica Jun 1993

Ground Failure And Remedial Measures At A Block Of Flats, I. Stanculescu, A. Chirica

International Conference on Case Histories in Geotechnical Engineering

Thee ground failure presented in the paper, occurred in 1986, in the foundation ground, of a ten storyed block of flats, consisting of Bahlui structured dilatant clay, normally consolidated. The foundation ground rupture, by plastic yielding, begin shortly after an accidental drowning of the basement. Before this accident, the building had not presented any signs of evolutive settlements processes. The paper presents the consolidation measures taken to stop the progressive yielding of the ground beneath the foundations. Results of tests pointed out the dilatant behavior and the sensitivity to moistening of the Bahlui clays, during the shear process.

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Analyses Of Behaviors Of Embankment Dams, N. Yasuda, M. Itoh, T. Fujisawa Jun 1993

Analyses Of Behaviors Of Embankment Dams, N. Yasuda, M. Itoh, T. Fujisawa

International Conference on Case Histories in Geotechnical Engineering

The design of embankment is carried out based on several assumptions for the dam body and foundation, and the dam is constructed according to the design conditions. Therefore, it is important to evaluate the conforming of assumptions to the design and construction by the observation of behavior of the dam body and foundation. In this report, internal vertical movement, pore-water pressure and surface movement are arranged concerning of 21 embankment dams of Japan in order to optimize the measurement method including frequency and proper installation of instrumentation and consequently to present a guidelines for the safety control of dams.

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Case History – Monitored Settlement Of 32m Thick Compacted Fill, William A. Trow, Richard Carrington, Timothy G. Orpwood Jun 1993

Case History – Monitored Settlement Of 32m Thick Compacted Fill, William A. Trow, Richard Carrington, Timothy G. Orpwood

International Conference on Case Histories in Geotechnical Engineering

An abandoned brickyard, about 32 m deep, was filled with soil from numerous excavations in the Metro Toronto area with the ultimate intent of development for residential purposes. Compaction and environmental control of the fill was carried out and drainage wells installed to keep the water table low in order to hasten the rate of settlement. The fill generally was placed at approximately 85 percent saturation. A magnetic settlement system was installed as the fill was placed and the differential settlement recorded during fill placement and about 4 years after completion. The rate of settlement response was rapid but proceeded …

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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 …

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Chinese Expansive Soil Canal Project, Ke Zunjing, Fan Qiuyan, Wang Guanping, Wang Xiangfan Jun 1993

Chinese Expansive Soil Canal Project, Ke Zunjing, Fan Qiuyan, Wang Guanping, Wang Xiangfan

International Conference on Case Histories in Geotechnical Engineering

This paper gives three representative expansive soil canal projects in China. The engineering geological conditions, the properties of the expansive soil, features of the slides and the measures taken for these canal projects are introduced in detail.

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Development Of Landslide At Csa-Open Mine In Bohemia, P. P. Procházka, J. Vacek Jun 1993

Development Of Landslide At Csa-Open Mine In Bohemia, P. P. Procházka, J. Vacek

International Conference on Case Histories in Geotechnical Engineering

Because of its descriptive properties physical modelling belongs to one of the most prospective means for assessment of behaviour of soils and rocks. Its disadvantage is a poor description of stress fields in the material. This difficulty can be partly avoided by means of mathematical modelling mainly by comparison of both the models. The coupled modelling brings also about new views on the statements of constitutive relations, here following Drucker, Prager, 1952, also Brož, Procházka, 1987, mathematical background e.g. Duvant, Lions, 1972. For more details of physical modelling see e.g. Vacek, 1991, another application of coupled modelling see e.g. Vacek, …

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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 …

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Full Scale Field Test On A Slope Progressive Failure, I. Stanculescu, C. Athanasiu, A. Chirică, I. I. Stănculescu, E. Georgescu Jun 1993

Full Scale Field Test On A Slope Progressive Failure, I. Stanculescu, C. Athanasiu, A. Chirică, I. I. Stănculescu, E. Georgescu

International Conference on Case Histories in Geotechnical Engineering

In order to obtain the mechanical behaviour parameters of the red structured clays from the Danube- Black Sea Canal and to estimate the behavior of the slopes cut in such clays, an experimental programme was carried out. A checked failure was provoked for a slope dug in red fissured clays. The paper presents the results of the field investigations and the laboratory test regarding the, characteristics of the structured clays, as well as the in situ measurements during the experimental programme. The results of these measurements are compared with those obtained by numerical symulation using a computer program.

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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 …

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Overview Of Geotechnical Issues Involved In The Olmsted Locks And Dam Project, J. C. Ruhl Jun 1993

Overview Of Geotechnical Issues Involved In The Olmsted Locks And Dam Project, J. C. Ruhl

International Conference on Case Histories in Geotechnical Engineering

The Olmsted Locks and Dam project consists of new twin 1200-foot locks and dam located on the Ohio River near its confluence with the Mississippi River. The site of the locks and dam presents some unique geotechnical challenges. A major landslide on the Illinois bank, artesian groundwater conditions, significant seismic considerations, and the design of the pile foundation and the construction cofferdams presented major challenges to the design engineers. The geotechnical investigations and the design considerations involved in this project are discussed.

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Performance Of An Embankment Built On A Soft Disturbed Clay, M. S. S. Almeida, F. A. B. Danziger, M. C. F. Almeida, S. R. L. Carvalho, I. M. S. Martins Jun 1993

Performance Of An Embankment Built On A Soft Disturbed Clay, M. S. S. Almeida, F. A. B. Danziger, M. C. F. Almeida, S. R. L. Carvalho, I. M. S. Martins

International Conference on Case Histories in Geotechnical Engineering

A high embankment was built on a soft clay disturbed due to an inadequate technique. Settlement analysis has been carried out to estimate coefficients of consolidation Cv, final settlements and average degrees of consolidation U. Laboratory and in situ tests have been performed to estimate C values as well. Piezometric measurements have also been made to estimate U values corrected with non linear oedometer test data. Times for settlement stabilization have been estimated with the available data.

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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.

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Rock Slides Along Haibat Sultan Road, N. Iraq, S. N. Al-Saadi, S. H. Al-Jassar Jun 1993

Rock Slides Along Haibat Sultan Road, N. Iraq, S. N. Al-Saadi, S. H. Al-Jassar

International Conference on Case Histories in Geotechnical Engineering

The instability of rock slopes controlling the main Arbil-Sulaimaniya road has been studied in the southwestern side of Haibat Sultan Mountain, northern Iraq. The cause of this instability is the presence of road cuts as well as the erosion at the toe of the slope. The military operations in the area have further increased the hazardous condition of the slope. Field observations at ten stations have revealed that plane sliding of limestone slabs had occurred within the layers of friable marl. The study focused on the mode of failure, as affected by slope orientation and discontinuity geometry. Subsequent monitoring revealed …

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Slope Engineering Of Expansive Highway Cut, Ge Guangbin, Ke Zunjing Jun 1993

Slope Engineering Of Expansive Highway Cut, Ge Guangbin, Ke Zunjing

International Conference on Case Histories in Geotechnical Engineering

This paper introduces the engineering geological conditions, the properties of the expansive soil and the measures taken in detail for two slope engineering projects of expansive highway cut In Guangxi province of China.

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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 …

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Tailing Dam Zelazny Most Environmental Hazard, M. Werno, B. Dembski, B. Juszkiewicz-Bednarczyk, Z. Mlynarek, W. Tschuschke Jun 1993

Tailing Dam Zelazny Most Environmental Hazard, M. Werno, B. Dembski, B. Juszkiewicz-Bednarczyk, Z. Mlynarek, W. Tschuschke

International Conference on Case Histories in Geotechnical Engineering

The factors governing the geotechnical stability of copper tailing dam Żelazny Most, the largest in Europe, have been discussed. The efficiency of pumping wells barrier against outflow of contaminated ground water has been predicted for a period of next 15 years.

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The Agua Prieta Powerhouse Slope Instability, F. Gonzalez-Valencia, S. Herrera-Castañeda Jun 1993

The Agua Prieta Powerhouse Slope Instability, F. Gonzalez-Valencia, S. Herrera-Castañeda

International Conference on Case Histories in Geotechnical Engineering

The slope instability that endangered seriously the powerhouse of the Aqua Prieta Hydroelectric Project and involved about one million cubic meters of soils and breccias is described. The evolution of the geotechnical instrumentation measurements done from October 1987 to date, the geomechanic analysis performed and the stabilization works are discussed.

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Time Prognosis Of Landslide Based On Unstable Creep, Wang Jianguo Jun 1993

Time Prognosis Of Landslide Based On Unstable Creep, Wang Jianguo

International Conference on Case Histories in Geotechnical Engineering

The fundamental characters at each of three stages of creep deformation of rock masses are discussed. A model, a friction element and a dashpot element connected in parallel, suitable for middle and short time prognosis is suggested--landslide happens at accelerated creep stage and its mechanism may be described by progressive deterioration (assuming linear decrease with time) of material parameters which denote the friction and the dashpot of rock masses. The verification for the model is carried out by comparing theoretical results with measured results of three typical landslides.

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Leakage At Upper Mun Dam, Nibondh Saihom, Ruongrit Ammawat, Mondhian Kangsasitiam Jun 1993

Leakage At Upper Mun Dam, Nibondh Saihom, Ruongrit Ammawat, Mondhian Kangsasitiam

International Conference on Case Histories in Geotechnical Engineering

The Upper Mun Dam located In Nakom Ratchaslma, the Northeastem Province of Thailand, intercepts a catchment area of 454 sq. kms. It is a zone earth dam with 32.7 meters of maximum height and 880 meters in length. The foundation strata comprises alluvial deposits overlying sandstone and siltstone. The chute spillway is designed for probable maximum flood of 950 m3/sec. and the outlet conduit is 1.84 by 1.84 meters caters for a maximum outflow of 11.2 m3/sec. No foundation treatment was carried out except cement grouting beneath the spillway and the outlet. The dam was completed …

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Residual Strength Parameters From A Slope Instability, P. Carrubba, N. Moraci Jun 1993

Residual Strength Parameters From A Slope Instability, P. Carrubba, N. Moraci

International Conference on Case Histories in Geotechnical Engineering

The study attempts to determine the in situ shear strength parameters of a stiff clay from a back analys1s of a well documented landslide. The relatively small extension of the instability, as well as the homogeneity of the clay formation and the defined slip surface, allows a consistent evaluation of shear strength parameters. The study is also supported by ring shear tests, and microscopic analysis performed on undisturbed thin sections, by means of scanning electron microscopy. The results of back analysis are in good agreement with laboratory tests and microscopy observations.

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Earthquake Induced Landslides In Columbia, J. A. Rodriguez, C. J. Poran Jun 1993

Earthquake Induced Landslides In Columbia, J. A. Rodriguez, C. J. Poran

International Conference on Case Histories in Geotechnical Engineering

The paper presents a case study of landslides associated with the 1983 Popayan earthquake in Colombia. It includes a systematic parametric study of the effect of earthquake characteristics and soil properties on slope behavior. Earthquake induced slope displacements are computed based on the sliding block concept. Computed results from two and three-dimensional analyses are compared with field observations. Conclusions are drawn in regard to the adequacy of analysis procedures, validity of slope deformation-critical acceleration curves, and effect of vertical acceleration on slope stability.

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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.

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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.

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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.

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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).

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