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Full-Text Articles in Geotechnical Engineering
Foundations Of New York Naval Base Sima Building, C. C. Chang, R. L. Kanthan
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.
Ground Failure And Remedial Measures At A Block Of Flats, I. Stanculescu, A. Chirica
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.
Analyses Of Behaviors Of Embankment Dams, N. Yasuda, M. Itoh, T. Fujisawa
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.
Behavior Of A Breakwater On Soft Sediments – Failure And Success, S-C. R. Lo, S-Q Li
Behavior Of A Breakwater On Soft Sediments – Failure And Success, S-C. R. Lo, S-Q Li
International Conference on Case Histories in Geotechnical Engineering
The observed responses during the staged construction of an unreinforced section and a reinforced section of a breakwater founded on soft sediments are presented. Both sections were instrumented and the unreinforced section approached instability at the end of Stage I construction. A series of Class 'C' predictions were made with three different analytical methods. It was particularly difficult to predict the impending instability of the unreinforced section. A fully coupled finite element analysis, with close modelling of the construction sequence and using a strain softening model for the foundation clay, was needed to predict all the observations.
General Report Session No. 2: Case Histories Of Slopes, Dams And Embankments, Leslie F. Harder Jr., Vlad G. Perlea, Nario Yasuda
General Report Session No. 2: Case Histories Of Slopes, Dams And Embankments, Leslie F. Harder Jr., Vlad G. Perlea, Nario Yasuda
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Case History – Monitored Settlement Of 32m Thick Compacted Fill, William A. Trow, Richard Carrington, Timothy G. Orpwood
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 …
Chinese Expansive Soil Canal Project, Ke Zunjing, Fan Qiuyan, Wang Guanping, Wang Xiangfan
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.
Development Of Landslide At Csa-Open Mine In Bohemia, P. P. Procházka, J. Vacek
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, …
Dynamics Of Rockfalls In Sri Lanka And Landslide Hazards, R. K. Bhandari, K. Jeyatharan, A. Raviskanthan
Dynamics Of Rockfalls In Sri Lanka And Landslide Hazards, R. K. Bhandari, K. Jeyatharan, A. Raviskanthan
International Conference on Case Histories in Geotechnical Engineering
The paper spotlights the dynamics of rockfalls and debrisflows in Sri Lanka in the backdrop of some recent examples and discusses the appropriateness of simple energy dissipation systems in situations where source of rockfall is either intractable or difficult to arrest. The question of runout of rockfalls usually significant in the assessment of their damage potential is also discussed and importance of such estimate is highlighted in the context of landslide hazard zonation mapping.
Evaluation And Remediation Of A Small Landslide In Colluvium, D. T. Mooney, J. J. Bowdes Jr.
Evaluation And Remediation Of A Small Landslide In Colluvium, D. T. Mooney, J. J. Bowdes Jr.
International Conference on Case Histories in Geotechnical Engineering
A landslide in colluvium near Grafton, West Virginia was evaluated for cause and remediation. Monitoring was conducted for 15 months to observe further movements prior to remediation. The observed failure surface, slide geometry and groundwater conditions were used to back-solution for an effective residual friction angle ( φr’) . The φr’ was found to agree well with index property correlations cited in the literature. Slope failure resulted from excessive pore water pressures due to seasonably high groundwater levels. Stability analyses using the back-solutioned φr’ were performed to design and position seepage cutoff drains for …
Full Scale Field Test On A Slope Progressive Failure, I. Stanculescu, C. Athanasiu, A. Chirică, I. I. Stănculescu, E. Georgescu
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.
Geotechnical Prediction And Performance Of Eastern Scheldt Storm Surge Barrier, J. Lindenberg, A. Plooster, J. P. F. M. Janssen
Geotechnical Prediction And Performance Of Eastern Scheldt Storm Surge Barrier, J. Lindenberg, A. Plooster, J. P. F. M. Janssen
International Conference on Case Histories in Geotechnical Engineering
The construction of the Eastern Scheldt storm surge barrier was completed in 1986. The monitoring system meant to verify the functioning of the barrier during storm conditions became operational in 1988. Data concerning the geotechnical response was collected during the 4 days storm period between February 26 and March 2, 1990. In the paper some results are described. Conclusions with respect to the expected behaviour of the barrier during more extreme storms in future will be drawn in near future.
Large Scale Instrumental Test Embankment On Uranium Tailings, J. L. Santiago, T. Barrera, M. Pastor
Large Scale Instrumental Test Embankment On Uranium Tailings, J. L. Santiago, T. Barrera, M. Pastor
International Conference on Case Histories in Geotechnical Engineering
The remediation of an inactive uranium mill tailings pile at the town of Andujar (Spain) has provided an opportunity to investigate the settlement characteristics of hydraulically-deposited uranium mill tailings. A test embankment was constructed on top of the existing tailings deposit and total stresses, settlements and pore pressures were measured. Settlements and pore pressure data were compared with the results obtained using an elastoplastic numerical model which allows the simulation of two dimensional consolidation processes. Backcalculated consolidation parameters were derived to provide agreement between the calculated and measured settlements and pore pressures. These parameters could then be used to predict …
Nipigon River Landslide, R. B. Dodds, J. P. Burak, K. D. Eigenbrod
Nipigon River Landslide, R. B. Dodds, J. P. Burak, K. D. Eigenbrod
International Conference on Case Histories in Geotechnical Engineering
A massive landslide occurred on the Nipigon River, north of the Town of Nipigon, Ontario, Canada in the early morning hours of April 23, 1990 and involved an estimated 300,000 cu m of soil. Although there was no loss of life, there were significant environmental and economic impacts. Discussed in this paper are the investigations carried out after the slide, the events prior to and the factors contributing to, the slide.
Overview Of Geotechnical Issues Involved In The Olmsted Locks And Dam Project, J. C. Ruhl
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.
Performance Of A Low Embankment On A Soft Soil Deposit, Gerald P. Raymond
Performance Of A Low Embankment On A Soft Soil Deposit, Gerald P. Raymond
International Conference on Case Histories in Geotechnical Engineering
The design and performance of a surcharged highway embankment across a 45 metre thick soft soil deposit is described. Using theoretical soil mechanics concepts it was predicted that the long-term stability necessitated the use of berms despite the fact that an undrained strength analysis based on in situ vane tests predicted a reasonable factor of safety. This fact is supported by the performance of an existing road. Consideration of both theoretical soil mechanics concepts and practical considerations suggested that the berms should be construction prior to the central fill and from their outer limits towards the centre. The central fill …
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
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.
Rock Slides Along Haibat Sultan Road, N. Iraq, S. N. Al-Saadi, S. H. Al-Jassar
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 …
Slope Engineering Of Expansive Highway Cut, Ge Guangbin, Ke Zunjing
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.
Tailing Dam Zelazny Most Environmental Hazard, M. Werno, B. Dembski, B. Juszkiewicz-Bednarczyk, Z. Mlynarek, W. Tschuschke
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.
Time Prognosis Of Landslide Based On Unstable Creep, Wang Jianguo
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.
Leakage At Upper Mun Dam, Nibondh Saihom, Ruongrit Ammawat, Mondhian Kangsasitiam
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 …
Residual Strength Parameters From A Slope Instability, P. Carrubba, N. Moraci
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.
Consolidation Study Of An Active Tailings Pond, B. F. Ulrich
Consolidation Study Of An Active Tailings Pond, B. F. Ulrich
International Conference on Case Histories in Geotechnical Engineering
Two geotechnical site investigations using state-of-the-art equipment for insitu testing have been made of a single tailing pond. The two separate investigations were made at an interval of approximately three years between studies. Each investigation included such tests as piezocone, self-boring pressuremeter, field vane shear, and standard penetration tests. The purpose of these tests was to establish various strength and phreatic characteristics of the tails in the deposit for use as input design parameters in the proposed upstream embankment expansion. This data may also be used to show a time-based consolidation study of a fully-drained, active tailing deposit. As tests …
Earthquake Induced Landslides In Columbia, J. A. Rodriguez, C. J. Poran
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.
Earthquake Damage To Fill Dams, S. Tani
Earthquake Damage To Fill Dams, S. Tani
International Conference on Case Histories in Geotechnical Engineering
Earthquakes have caused much damage to fill type dams. Research into earthquake damage has contributed to the study of earthquake resistance of dams. However damage to fill dams occurred almost only to small scale earth dams, especially the few cases of heavy damage. This report describes the damage and performance of fill dams more than 15m-high during earthquakes, drawn from literature, data, and field surveys. The results indicate that even stronger earthquakes than the design earthquake intensity did not cause heavy damage to large well-constructed modern dams. The above analysis of the performance of fill dams during earthquakes shows that …
Gravelly Soil Properties By Field And Laboratory Tests, Takaaki Konno, Yoshio Suzuki, Akira Tateishi, Kenji Ishihara, Kinji Akino, Setsuo Iizuka
Gravelly Soil Properties By Field And Laboratory Tests, Takaaki Konno, Yoshio Suzuki, Akira Tateishi, Kenji Ishihara, Kinji Akino, Setsuo Iizuka
International Conference on Case Histories in Geotechnical Engineering
The basic policy in Japan is to build nuclear reactor buildings on rock. But, in order to cope with the middle and long term siting problems it has become necessary to develop new siting technology from the standpoint of expanding the available range of site selections and effective utilization of lands. The gravelly soil layer in the Quaternary deposits has high possibility of becoming the bearing soil stratum when constructing a nuclear power plant. In order to verify the seismic stability of such gravelly soil layers, a series of field dynamic and static torsional loading tests for large scale in-situ …
Liquefaction Study Eastern Scheldt Foreshore, T. P. Stoutjesdijk
Liquefaction Study Eastern Scheldt Foreshore, T. P. Stoutjesdijk
International Conference on Case Histories in Geotechnical Engineering
All available methods to obtain insight into the flow slide susceptibility have been applied on one location. This demonstrates, that the level of available knowledge is of influence on the quality of the advice. An overview of the methods and the results is given. The results are discussed. The conclusion is, that advanced study improves the understanding of uncertainties, and therefore gives a better assessment of risks. In this case, insight lead to the advice that no expensive measures were necessary, at least for part of the location.
Numerical Estimate Of Tangshan Earthquake Damage, H. Y. Loo
Numerical Estimate Of Tangshan Earthquake Damage, H. Y. Loo
International Conference on Case Histories in Geotechnical Engineering
The initial stress is first calculated quasi-statically under various loading conditions by using 3-dimenaional finite element model with double nodes to simulate the locked Tangsban fault. Once the shear stress at the front of fault tip reaches rupture criterion, the accumulated stress is suddenly released accompanying with frictional slip along the fault plane, the new state of stress imposed during faulting is re-calculated by reducing the shearing resistance of the hypocenter with the same boundary condition. Then the stress difference before and during shock is regarded as the driving force to generate ground motion. Numerical results show that both the …
Seismic Qualification Of Mechanical Systems, A. K. Singh, K. G. Bhatia
Seismic Qualification Of Mechanical Systems, A. K. Singh, K. G. Bhatia
International Conference on Case Histories in Geotechnical Engineering
Seismic qualification of large and complex mechanical systems is a tedious task in itself. It not only involves high computational cost, but also becomes cost ineffective in case repeated runs are required from safety considerations. Seismic analysis of one bank of Main PHT System of a typical Nuclear Power Plant has been attempted. Besides analysing the complete system, an attempt has also been made to divide the complete system into logical subsystems and analyse the same for the prescribed seismic loads. The results thus obtained have been compared with those of the complete system and a fairly good degree of …