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Articles 12211 - 12240 of 13029

Full-Text Articles in Engineering

A Case Of Land Use And Urban Planning In The Expansive-Soil District, Hou Shitao, Wang Siyi, Zhou Jibing, Cao Kezhi May 1984

A Case Of Land Use And Urban Planning In The Expansive-Soil District, Hou Shitao, Wang Siyi, Zhou Jibing, Cao Kezhi

International Conference on Case Histories in Geotechnical Engineering

Taking the construction and reform planning for new town of Yunxian County as an example, this paper deals with the principles of land development and use and town construction and reform planning in the expansive-soil area in the case of undulating mountain topography, including the problems of treating expansive-soil slope, of treating expansive-soil foundation etc., not involving other aspects of general planning.

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A Case Of Singular Geotechnical Failure For Industrial Structures In The Peruvian Andes, A. Carillo Gil, R. Torres Vega May 1984

A Case Of Singular Geotechnical Failure For Industrial Structures In The Peruvian Andes, A. Carillo Gil, R. Torres Vega

International Conference on Case Histories in Geotechnical Engineering

During the rainy season of 1982, foundation distress was occurred at several recently completed and still incomplete structures of an important mine project located in the Peruvian Andes. When the tailings thickener was tested an unexpected settlement started, some cracking was observed in the slab, and the central pier settled and tilted. The nature of the distress suggested the failure occurred as the result of the combined effect of a long term seepage under the bearing foundation soil and due to its different degree of compaction. This paper presents the characteristics of these problems as both foundation and fill materials, …

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A Dockwall Failure In Milwaukee, Wisconsin, A. B. Wagner May 1984

A Dockwall Failure In Milwaukee, Wisconsin, A. B. Wagner

International Conference on Case Histories in Geotechnical Engineering

In 1975, a dockwall at the Port of Milwaukee, Wisconsin failed as salt was being deposited behind the wall. In 1981, exploration at the site was required for a new development. The exploration program included field testing to measure the shear strength of the organic soils through which the failure occurred. Dutch cone and vane shear devices were used. Continuous undisturbed samples were obtained in two (2) borings. This allowed an accurate determination of the stratigraphy in the slide area. The shear strength of the undisturbed samples was measured in the laboratory by means of the Torvane device. The shear …

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General Report For Theme Eight – Case Histories In Selection Of Sites For Industrial Structures And Determination Of Design, P. D. Deo May 1984

General Report For Theme Eight – Case Histories In Selection Of Sites For Industrial Structures And Determination Of Design, P. D. Deo

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Geotechnical Investigations For Foundation Design For Multi-Storeyed Building, S. C. Handa, Swami Saran, G. Ramasamy, A. S. R. Rao, B. Prakash May 1984

Geotechnical Investigations For Foundation Design For Multi-Storeyed Building, S. C. Handa, Swami Saran, G. Ramasamy, A. S. R. Rao, B. Prakash

International Conference on Case Histories in Geotechnical Engineering

Oil and Natural Gas Commission of India plans to construct a multi-storeyed building in Dehradun city at the foothills of Himalayas. The geotechnical investigations were carried out at site to determine soil parameters for foundation design. It was found that it was not possible to provide a raft foundation for the building and hence alternatively the pile foundation was suggested. The pile load capacity was predicted on the basis of soil parameters determined and a comparison was then made with the results obtained by carrying out load tests on constructed piles.

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Siting For A Nuclear Power Plant In Saudi Arabia, A. A. Sabtan, W. M. Shehata May 1984

Siting For A Nuclear Power Plant In Saudi Arabia, A. A. Sabtan, W. M. Shehata

International Conference on Case Histories in Geotechnical Engineering

A site reconnaissance study was conducted in the mid-western coastal area of Saudi Arabia to select the most suitable site for a nuclear power plant. Three potential sites near Yanbu, Rabigh and Jeddah were selected, evaluated and ranked according to their acceptability based on the U.S. Atomic Energy Commission Regulatory criteria. Based on this preliminary investigation, it was found that the area south of Yanbu city is the most feasible site. Geotechnical properties of the soil and rock, seismicity and proximity to load center played an important role in Yanbu site selection. More detailed study is recommended for this site. …

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Siting Study For An Aluminum Plant In Central Kentucky, Grover C. Cox Iii May 1984

Siting Study For An Aluminum Plant In Central Kentucky, Grover C. Cox Iii

International Conference on Case Histories in Geotechnical Engineering

This paper describes a soil and rock exploration program that studied three (3) alternate sites for a 2,600 foot long aluminum production facility. Based on the results of the preliminary explorations, the third side was selected, although it had the poorest geotechnical properties and would be the most expensive to develop. This site contained karst features. Therefore, the major objective of the continuing exploration and design program was the overall clarification and quantification of the degree and distribution of solution activity across the site and its effect on construction planning and operations. A detailed analysis of the subsurface geohydrology was …

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Study Of Vibration In Site Selection For A Precision Instrument Factory, Pan Fulan May 1984

Study Of Vibration In Site Selection For A Precision Instrument Factory, Pan Fulan

International Conference on Case Histories in Geotechnical Engineering

Antivibration is an important consideration in site selection for setting up a precision instrument factory. Any negligence to this could bring to the future production a great deal of trouble, as that the measurement will be inaccurate, the precision of products will not be up to the requirements, the instruments and meters will be damaged. In this paper, case histories in selection of site of the factory are described briefly. Then based on the site tests and wave theory, the formula for calculating the attenuation of amplitude, the principles for selecting the site of a factory and the necessary distances …

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Behavior Of Two Big Rockfill Dams, And Design Aims, V. F. B. De Mello May 1984

Behavior Of Two Big Rockfill Dams, And Design Aims, V. F. B. De Mello

International Conference on Case Histories in Geotechnical Engineering

The case histories of two major compacted embankment dams are analysed with regard to the problem most amenable to reasonings and computations of statistics of averages, the problem of deformations, discussed regarding specific laboratory testing compared with use of generalized correlations. Improved mental models for predictions are proposed. In the earthcore-compacted rockfill section the problem of crest cracking suggests the interest in a significant change of zoned section in the topmost stretch. For the concrete-face rockfill dam it is suggested that one needs a significant revision of instrumentation and monitoring orientation. Both dams behaved extraordinarily well on questions of consequence …

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Case Histories For Today's Geotechnique, R. B. Peck May 1984

Case Histories For Today's Geotechnique, R. B. Peck

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Case History - Hyperbolic Cooling Tower Foundation, L. J. Almaleh May 1984

Case History - Hyperbolic Cooling Tower Foundation, L. J. Almaleh

International Conference on Case Histories in Geotechnical Engineering

This paper summarizes the design considerations and construction techniques employed during the construction of two hyperbolic cooling tower foundations. Included are descriptions of the site conditions, foundation loading requirements, drilled pier design techniques, construction coordination, and foundation installation.

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Case History On Dewatering Problems In Shanghai, L. X. Shi May 1984

Case History On Dewatering Problems In Shanghai, L. X. Shi

International Conference on Case Histories in Geotechnical Engineering

This paper deals with the dewatering problems in soft soils; it also describes the historical review of the dewatering work in the Shanghai region. In some cases, the measures taken in preventing the settlement of the neighbouring buildings have been introduced.

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Densifying A Landfill For Commercial Development, S. B. Steinberg, R. G. Lukas May 1984

Densifying A Landfill For Commercial Development, S. B. Steinberg, R. G. Lukas

International Conference on Case Histories in Geotechnical Engineering

This paper presents a case study of a dynamic compaction ("pounding") project, undertaken in Skokie, Illinois. The purpose was to densify a 50-ft deep former municipal waste landfill for support of a one-story warehouse structure on shallow foundations. The majority of the pounding was performed utilizing a 15-ton weight falling from a height of 60 ft. In some areas, lower energy levels were used for surface compaction. All phases of the project are discussed, beginning with the subsurface exploration program and geotechnical analysis, through the experimental test pounding section, and the final check borings to observe that the "production" pounding …

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Design Of Road Cut Adjacent To Existing Structure, G. C. Whited, C. N. Laughter May 1984

Design Of Road Cut Adjacent To Existing Structure, G. C. Whited, C. N. Laughter

International Conference on Case Histories in Geotechnical Engineering

Interchange improvements within an urban environment required the deepening of a hillside cut. Design restraints required as deep a cut as possible without disturbing a water tower located at the crest of the slope or interfering with a shopping center at the toe. The water tower, constructed in 1933 with a steel tank encased in a concrete and brick structure, was founded on shallow spread footings. Foundation soils were silts and silty sands with seams of silty clay. The design investigation involved hydrogeologic studies, SPT borings, undisturbed sampling, laboratory testing, and stability analyses. Laboratory studies involved routine and unusual testing …

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Dewatering Of The Construction Site For A 200-Foot Diameter Clarifier Tank Founded On Sand And Gravel, Grover C. Cox Iii May 1984

Dewatering Of The Construction Site For A 200-Foot Diameter Clarifier Tank Founded On Sand And Gravel, Grover C. Cox Iii

International Conference on Case Histories in Geotechnical Engineering

This paper presents the preliminary design, the field modifications applied to the final design, and additions made to the dewatering system for a wastewater treatment plant. The site history is described, as are the exploration, design and construction phases of the dewatering operation. The difference between the predicted results and the actual results and lessons learned from experience in the field are discussed. The data includes design parameters for hydrological applications derived from the site soils and the groundwater elevations from one month before the beginning of construction through the construction of the clarifier tank and an additional pump building.

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Direct And Indirect Influence Of Mining Related Subsidence On Structural Damages - A Case Study, H. J. Siriwardane, L. K. Moulton May 1984

Direct And Indirect Influence Of Mining Related Subsidence On Structural Damages - A Case Study, H. J. Siriwardane, L. K. Moulton

International Conference on Case Histories in Geotechnical Engineering

An investigation of causes of damages to a structure located at a toe of a hillside over an undermined area is described. The investigation included a finite element analysis and an analysis of landslide susceptibility of the hillside. Direct and Indirect influence of mining activity appears to be the cause of structural damages.

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Dykes On Clay Foundation At Bersimis 2, S. Z. Akber May 1984

Dykes On Clay Foundation At Bersimis 2, S. Z. Akber

International Conference on Case Histories in Geotechnical Engineering

This paper discusses the behaviour (settlement, high foundation pore pressure, horizontal displacement and seepage) of two dykes founded on a thick clay deposit, since their completion in December, 1958 to date. In the first case, coarse and fine sand layers successively cover an over sixty meters thick clay deposit; in the second case, an eight to thirty meters thick clay layer is underlain by a heterogeneous granular deposit. Foundation treatments including problems encountered during the foundation works are discussed. Results of static and pseudo-static analyses carried out using the measured high pore pressures are compared with the factors of safety …

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General Report A For Theme Nine – Case Histories In Subsidence Of Soils, Tunnels And Shafts In Soft Ground, Waste Disposal Sites And Pavements, Hal Aldrich May 1984

General Report A For Theme Nine – Case Histories In Subsidence Of Soils, Tunnels And Shafts In Soft Ground, Waste Disposal Sites And Pavements, Hal Aldrich

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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General Report B For Theme Nine – Geotechnical History Of Projects Other Than Presented In Sessions 1-8, Charles Mansur May 1984

General Report B For Theme Nine – Geotechnical History Of Projects Other Than Presented In Sessions 1-8, Charles Mansur

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Geotechnical Aspects Of The Fort Mchenry Tunnel - Design And Construction, S. K. Sarkar, G. A. Munfakh May 1984

Geotechnical Aspects Of The Fort Mchenry Tunnel - Design And Construction, S. K. Sarkar, G. A. Munfakh

International Conference on Case Histories in Geotechnical Engineering

The geotechnical considerations affecting the design and construction of an immersed-tube tunnel are presented. Construction of the tunnel required deep excavations in overconsolidated fissured and slickensided clay deposits. Undrained, long-term residual and fully softened drained strength parameters were determined. The depth of excavation and the life of the cut slope were considered in selecting the design parameters for the slope study analysis. A tied-back soldier pile and lagging system was used for protection of the east end excavation in a congested urban area. Each tie-back was tested according to a simple acceptance criteria developed during construction. Lateral displacements measured behind …

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Ground Improvement For Oil Tank Farm In Indonesia, A. F. Abbs, J. M. Cognon, R. W. N. Kelsey May 1984

Ground Improvement For Oil Tank Farm In Indonesia, A. F. Abbs, J. M. Cognon, R. W. N. Kelsey

International Conference on Case Histories in Geotechnical Engineering

This case study describes the use of ground improvement to treat a highly variable site, where new oil storage tanks were constructed. Varied techniques were used comprising a combination of dynamic compaction, preload, vertical drains and replacement. Settlement data from the storage tanks during water test shows the treatment to have been successful.

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Ground Movement Characteristics Above Mined Panels In Appalachia-An Empirical Approach, M. Karmis, T. Triplett, P. Schillizzi, G. Hasenfus May 1984

Ground Movement Characteristics Above Mined Panels In Appalachia-An Empirical Approach, M. Karmis, T. Triplett, P. Schillizzi, G. Hasenfus

International Conference on Case Histories in Geotechnical Engineering

The growing recognition of mining subsidence and its effects has provoked numerous investigations into the modeling and prediction of this phenomenon. Through an analysis of case histories and examination of the various modeling techniques, it has become apparent that empirical studies currently represent the most realistic approach to this problem. However, the collection, analysis and interpretation of subsidence and strain data acquired from case studies presents substantial difficulties, due to varying monitoring techniques and methods of analysis. In this paper it is suggested that a prescribed monitoring program could eliminate these problems and ensure quality data by standardizing the measurement …

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Highway Interchange Constructed With Slurry Walls, E. Itzig Heine, Frank A. Mcdonough, Surinder Singh May 1984

Highway Interchange Constructed With Slurry Walls, E. Itzig Heine, Frank A. Mcdonough, Surinder Singh

International Conference on Case Histories in Geotechnical Engineering

The use of slurry walls to support 40 feet high embankments and bridge structures at Techwood-Spring Connector, part of Williams Street Interchange in Atlanta, is described. Advantages of using slurry walls in lieu of conventional walls are discussed.

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Improvement Of A Dumped Rockfill Foundation By Dynamic Consolidation, Adrian Wightman, Nelson F. Beaton May 1984

Improvement Of A Dumped Rockfill Foundation By Dynamic Consolidation, Adrian Wightman, Nelson F. Beaton

International Conference on Case Histories in Geotechnical Engineering

The paper describes an Industrial Park development, on the British Columbia coast, where Dynamic Consolidation was chosen to densify a loose rockfill prior to construction of a modern high capacity sawmill on shallow foundations. The design and execution of the compaction are described. The in situ tests used to monitor the compaction are described and results presented. It is concluded that the desired result was achieved, and this is supported by a survey of foundation elevations taken four years after construction.

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Instrumentation Of A Sewer Tunnel In Weak Singapore Soils, K. W. Lo, G. P. Karunaratne, S. L. Lee May 1984

Instrumentation Of A Sewer Tunnel In Weak Singapore Soils, K. W. Lo, G. P. Karunaratne, S. L. Lee

International Conference on Case Histories in Geotechnical Engineering

The effects of tunnelling in soft ground consisting mainly of Singapore marine clay were recently monitored to establish ground response characteristics. A sewer tunnel of 2.1 m square section was driven at a depth of 6.3 m in this soil by jacking conventional shield and face supports against installed timber lining. Ground response was monitored by an assortment of field instruments read over several weeks' duration. Peck's proposal (1969) of fitting a normal distribution profile to lateral surface settlement field plots when a heading is well past, and the suggestion by Oshikoshi et al 0978) that similar profiles may be …

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Mechanism Of Dynamic Consolidation And Its Environmental Effect, Zhong-Qi Wang, Xiang-Iin Deng May 1984

Mechanism Of Dynamic Consolidation And Its Environmental Effect, Zhong-Qi Wang, Xiang-Iin Deng

International Conference on Case Histories in Geotechnical Engineering

This paper is contributed as case histories in ground soil improvement with particular emphasis of dynamic consolidation. The authors try to present as much as they got from the field testings and observations including vibrational parameters, pore pressures, stereoscopic photogrammetry, etc. in order to trace the real behaviour of ground movement during tamping. It is believed that all the data got from the field work are rather informative and illustrative than that from theoretical modelling in the laboratory. Thus, some highlights relating effective thickness of compaction, maximum spacing between compaction points, number of blows for optimum tamping and seismic attenuation …

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Performance Of Sand Drains In A Tidal Marsh, R. P. Long, W. H. Hover May 1984

Performance Of Sand Drains In A Tidal Marsh, R. P. Long, W. H. Hover

International Conference on Case Histories in Geotechnical Engineering

This paper presents the field behavior of a jetted sand drain installation at a preloaded wastewater treatment facility site in Gloucester, Massachusetts, U.S.A. The site is underlain by surficial estuary deposits above a stratum of stiff to soft clays. Detailed subsurface explorations and laboratory testing program provided data to predict amounts and rates of primary compression and rates of secondary compression in the referenced strata. The field behavior is compared to predictions through analyzed values of total settlement at the end of primary compression, coefficient of consolidation, and coefficient of secondary compression. A field instrumentation program allowed monitoring of settlements …

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Preloading For Large Storage Building, A. C. Stamatopoulos, P. C. Kotzias May 1984

Preloading For Large Storage Building, A. C. Stamatopoulos, P. C. Kotzias

International Conference on Case Histories in Geotechnical Engineering

The properties and method of preloading a 11 m erratic deposit of soft clays and loose sands, are described. Under the preload embankment of 12 m the deposit compressed an average of 7%. Settlement developed rapidly and excess porepressure dissipated within few days, never exceeding 2.1 m of water head. After preload removal borings were performed to compare results with those obtained on the untreated site. This comparison showed that the compressibility and strength of both the clayey and sandy components improved substantially and that the subsurface became more homogeneous. The projected structure built on the improved ground has performed …

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Settlements Induced By Soft Ground Tunneling, Miguel P. Romo May 1984

Settlements Induced By Soft Ground Tunneling, Miguel P. Romo

International Conference on Case Histories in Geotechnical Engineering

Ground settlements induced by air-pressure shield tunneling throughout the soft clays of Mexico City have been monitored in five test sections by means of settlement points installed at various depths and distances from the tunnel axis. Subsoil conditions and soil characteristics at each site were thoroughly studied in the field and in the laboratory. Measured settlement profiles have been compared to those computed by a simplified analytical procedure showing very good agreement.

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Soil-Cement Backfill For Nuclear Power Plant Foundations, E. Saveri, G. P. Vaccaro, G. Varosio May 1984

Soil-Cement Backfill For Nuclear Power Plant Foundations, E. Saveri, G. P. Vaccaro, G. Varosio

International Conference on Case Histories in Geotechnical Engineering

Soil-cement backfills have been analyzed, designed and tested for the Alto Lazio Nuclear Power Plant in Italy. Extensive analyses were performed to evaluate the stability of and stresses in soil-cement foundation backfills. Soil-structure interaction was also analyzed. The minimum required cement content for foundation and general backfills was established and verified by means of laboratory and field tests. Foundation backfills were designed for two major buildings of the plant.

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