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Articles 3241 - 3270 of 4589

Full-Text Articles in Geotechnical Engineering

Landfill Leachate Production And Gas Generation Numerical Model, John Edward Riester Jr. Jan 1994

Landfill Leachate Production And Gas Generation Numerical Model, John Edward Riester Jr.

Civil & Environmental Engineering Theses & Dissertations

Numerous processes occur in landfills which lend themselves to modeling. Many of the processes are mutually interdependent. An unsteady numerical model is developed combining the major processes. The three-dimensional moisture transport equations and boundary conditions are solved using an implicit finite difference scheme. The boundaries are determined through a two-dimensional runoff model for the landfill surface and a one-dimensional leachate liner flow model at the bottom of the landfill. The runoff model accounts for evapotranspiration, runoff, infiltration, and leachate recirculation. Richard's equation is solved for saturated and unsaturated vertical flows and Darcy's Equation is solved for lateral flow between adjacent …

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Conference Speakers, Multiple People Jun 1993

Conference Speakers, Multiple People

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Author Index Volume I And Ii, Multiple Authors Jun 1993

Author Index Volume I And Ii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Meet Our Authors, Multiple Authors Jun 1993

Meet Our Authors, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Meeting Minutes Of The Organizing And Steering Committees, Multiple Members Jun 1993

Meeting Minutes Of The Organizing And Steering Committees, Multiple Members

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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List Of Conference Participants, Multiple Participants Jun 1993

List Of Conference Participants, Multiple Participants

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Banquet Speeches, Multiple Authors Jun 1993

Banquet Speeches, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Table Of Contents - Vol. I, Multiple Authors Jun 1993

Table Of Contents - Vol. I, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Table Of Contents - Vol. Ii, Multiple Authors Jun 1993

Table Of Contents - Vol. Ii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Ii, Multiple Authors Jun 1993

Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Ii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. I, Multiple Authors Jun 1993

Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. I, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Conference Schedule, Multiple Participants Jun 1993

Conference Schedule, Multiple Participants

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Analysis Of Small Pipe Piles Using The Field Vane, G. A. Miller, A. J. Lutenegger Jun 1993

Analysis Of Small Pipe Piles Using The Field Vane, G. A. Miller, A. J. Lutenegger

International Conference on Case Histories in Geotechnical Engineering

Results of axial compressive load tests on three small diameter pipe piles driven in a varved clay deposit are presented. Predictions of the axial pile capacity were made using the a-method originally proposed by Tomlinson (1957, 1971) and incorporating undrained strength profiles determined with the field vane. Predicted and measured capacities are compared and discussed in light of the various factors which can affect the outcome such as vane geometry, vane testing procedure and interpretation, pile load testing conditions, and empirical relationships incorporated in predictions.

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Bearing Capacity And Load-Displacement Behavior Of Rigid Pads On Soft, Sensitive, Clay, R. J. Jardine, B. M. Lehane, P. R. Smith, P. A. Gildea Jun 1993

Bearing Capacity And Load-Displacement Behavior Of Rigid Pads On Soft, Sensitive, Clay, R. J. Jardine, B. M. Lehane, P. R. Smith, P. A. Gildea

International Conference on Case Histories in Geotechnical Engineering

The paper describes tests on rigid square pads at the UK national soft clay research site at Bothkennar, Scotland. The work was performed as a low cost adjunct to the instrumented pile research described by Lehane and Jardine (1992). Its aims were to investigate (i} bearing capacity, (ii) load-displacement response to short and long term loading, (iii) the applicability of relevant theories and (iv) relationships between soil properties determined in-situ and those measured in high quality laboratory tests.

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Behavior Of Laterally Loaded Drilled Shafts In Stiff Soil, A. J. Lutenegger, G. A. Miller Jun 1993

Behavior Of Laterally Loaded Drilled Shafts In Stiff Soil, A. J. Lutenegger, G. A. Miller

International Conference on Case Histories in Geotechnical Engineering

Results of lateral load tests on four drilled shafts installed in stiff cohesive soil are presented. Predictions of the load/displacement behavior were made using p-y curves generated from the results of Prebored Pressuremeter and Dilatometer Tests. A new method to develop p-y curves from the DMT is presented and discussed.

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Caisson Foundations For Cellular Telephone Monopoles, Donald A. Benvie, Jeffrey B. Kirby Jun 1993

Caisson Foundations For Cellular Telephone Monopoles, Donald A. Benvie, Jeffrey B. Kirby

International Conference on Case Histories in Geotechnical Engineering

Design and construction procedures that were implemented for the installation of caisson foundations to support cellular telephone monopoles at fifteen sites throughout metropolitan New York are presented herein. Subsurface investigation procedures, development of geotechnical design criteria, methods of structural analysis and caisson design, and actual construction installation of the caissons have been provided along with a comparison of soil conditions and their impact on design and construction of the caissons.

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Case Histories Of Bored Pile Foundations, T. Z. Rao Jun 1993

Case Histories Of Bored Pile Foundations, T. Z. Rao

International Conference on Case Histories in Geotechnical Engineering

A kind of bored pile with large diameter is being used in civil engineering in China. The maximum length in earth of the pile is greater than 100 m. This pile may be built in rock. In the paper, the constructing methods of the bored pile foundation of a bridge and a grade separation are described. Relating the result with its cause, the failure of the bored pile in construction, the cause of the failure and the treatment methods are related.

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General Report Session No. 1: Case Histories Of Foundations, Roy E. Olson, J. H. Long, R. Jardine, Yudhbir Jun 1993

General Report Session No. 1: Case Histories Of Foundations, Roy E. Olson, J. H. Long, R. Jardine, Yudhbir

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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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.

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Concluding Session, Y. Iwasaki Jun 1993

Concluding Session, Y. Iwasaki

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors Jun 1993

Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Iii, Multiple Authors Jun 1993

Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Iii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Prediction And Observation Of Pore Pressure Due To Pile Driving, S. Chandra, Md. I. Hossain Jun 1993

Prediction And Observation Of Pore Pressure Due To Pile Driving, S. Chandra, Md. I. Hossain

International Conference on Case Histories in Geotechnical Engineering

In this study, pore pressure response due to pile driving has been observed in the field. Cavity Expansion theory using critical state parameters of the soil has been used to predict the trend of the pore pressure development and dissipation. Parametric study has been carried out to know the sensitivity of various parameters on the predicted results. A comparison has been made between the predicted and observed results.

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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 …

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General Report Session No. 2: Case Histories Of Slopes, Dams And Embankments, Leslie F. Harder Jr., Vlad G. Perlea, Nario Yasuda Jun 1993

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.

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Dynamics Of Rockfalls In Sri Lanka And Landslide Hazards, R. K. Bhandari, K. Jeyatharan, A. Raviskanthan Jun 1993

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.

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Evaluation And Remediation Of A Small Landslide In Colluvium, D. T. Mooney, J. J. Bowdes Jr. Jun 1993

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 …

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Large Scale Instrumental Test Embankment On Uranium Tailings, J. L. Santiago, T. Barrera, M. Pastor Jun 1993

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 …

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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 …

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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.

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