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Geotechnical Engineering

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Articles 3331 - 3360 of 4582

Full-Text Articles in Engineering

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.

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Analyzing Man-Made Vibrations, Diagnostics And Monitoring, M. R. Svinkin Jun 1993

Analyzing Man-Made Vibrations, Diagnostics And Monitoring, M. R. Svinkin

International Conference on Case Histories in Geotechnical Engineering

Machine foundation and construction vibrations ate main industrial man-made vibrating sources. Eight presented case histories are divided on two groups: machine foundation oscillations and seismic effect of man-made vibrations. There is the attempt in this paper to suggest a guideline for determination the causes of arisen perceptible machine foundation vibrations. Some case histories are described shortly using the following set-up: arisen problem, field investigation and measurements, the suggested solution, the performance, and final results. Others case histories are elaborated in details.

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Combined Isolation Foundation By Elastic Base Plate And Ground Barriers, Guang-Yun Gao, Xian-Jian Yang Jun 1993

Combined Isolation Foundation By Elastic Base Plate And Ground Barriers, Guang-Yun Gao, Xian-Jian Yang

International Conference on Case Histories in Geotechnical Engineering

A high sensitive and large semi-anechoic chamber, designed by a new system of isolation is reported in this paper. The combined isolation of a large size elastic plate on sand cushion and pile barriers was used in this system. By properly designing the stiffness of elastic base plate, the amplitude of the anechoic chamber floor under the action of dynamic toad of testing vehicle can be controlled within the allowed range of accuracy. This new system has been conformed with the disturbance of outside of vibration on anechoic chamber (passive vibration isolation) and with that of vehicle testing inside the …

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Rock Music Induced Damage And Vibration At Nya Ullevi Stadium, A. Bodare, S. Erlingsson Jun 1993

Rock Music Induced Damage And Vibration At Nya Ullevi Stadium, A. Bodare, S. Erlingsson

International Conference on Case Histories in Geotechnical Engineering

Two rock concerts were held in the City of Gothenburg, Sweden at Nya Ullevi soccer stadium the summer of 985. The stadium is founded on driven piles in soft clay. An enthusiastic audience was jumping in time to the songs. Violent vibrations of the suspension wires and in the cantilever roof beams of the structure were observed and damage to the roof and the building itself was detected after the concerts. People on the pitch and inside the stadium building experienced excessive vibrations. Residential buildings 400 m away experienced vibrations. Concerts are at present not permitted at the stadium. The …

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Augercast Pile Retaining Walls, D. W. Hohmeyer Jun 1993

Augercast Pile Retaining Walls, D. W. Hohmeyer

International Conference on Case Histories in Geotechnical Engineering

A case study is presented concerning the design and construction of two retaining walls constructed with augercast piles. The paper describes the successful use of augercast piles for retaining walls with heights of 22.0 and 32.0 feet. The 22.0 foot permanent wall was tied back to an existing structure. The temporary wall used a circular configuration and vertical anchor piles to obtain a 32.0 foot wall height without tiebacks or bracing.

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Behavior Of A Braced Sheet Pile Wall In Soft Clay, T. Edstam, Leif Jendeby Jun 1993

Behavior Of A Braced Sheet Pile Wall In Soft Clay, T. Edstam, Leif Jendeby

International Conference on Case Histories in Geotechnical Engineering

The earth pressure distribution against, and the displacement of, a braced sheet pile wall in soft clay have been examined. In connection with the construction of a fly-over, on the west cost of Sweden, two sections of a braced sheet pile wall were instrumented. The instrumentation consisted of earth pressure cells and inclinometer pipes mounted on three sheet piles. The sheet pile wall was also analyzed by means of the FLAC code in which the interaction between the sheet pile wall, the struts and the soil was studied. The movements and the calculations are compared with a conventional design method …

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Behavior Of Braced Sheetpile Excavation In Detroit Clay, H. Abedi, T. G. Porter, B. H. Lien, J. A. Ramos Jun 1993

Behavior Of Braced Sheetpile Excavation In Detroit Clay, H. Abedi, T. G. Porter, B. H. Lien, J. A. Ramos

International Conference on Case Histories in Geotechnical Engineering

This paper presents the design criteria, finite element modeling and actual behavior of a braced sheetpile excavation in Detroit soft clay. Due to the close proximity of existing structures to the excavation, a detailed analysis was performed to design and construct an earth retention system to avoid damage to these structures. The excavation involved a 170 ft by 220 ft area. The maximum depth of excavation was 23.5 ft. The subsurface soil consists of soft to very soft Detroit clay from the excavation level to a depth of 80 ft and has an undrained shear strength as low as 360 …

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Behavior Of Deep Excavations Using Sheet Pile Bracing System In Soft Bangkok Clay, Wanchai Teparaksa Jun 1993

Behavior Of Deep Excavations Using Sheet Pile Bracing System In Soft Bangkok Clay, Wanchai Teparaksa

International Conference on Case Histories in Geotechnical Engineering

The sheet pile bracing system is the most well-known for excavation work in Bangkok soft marine clay. The sheet pile wall which is defined as flexible wall will show a large significant of lateral deformation and ground surface settlement if the excavation system is carried out without a good quality control. The sheet pile bracing system with fully effective preloading strut system was designed for basement excavation of 11.3 m. deep of Bai Yok Tower II. The results indicate that berm width can reduce the maximum sheet pile wall deflection only at the first three stages of excavation. The fully …

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Braced Excavation At The Nipsco Bailly Station Power Plant, J. D. Bray, R. J. Deschamps, Ad. J. Augello, R. S. Parkison Jun 1993

Braced Excavation At The Nipsco Bailly Station Power Plant, J. D. Bray, R. J. Deschamps, Ad. J. Augello, R. S. Parkison

International Conference on Case Histories in Geotechnical Engineering

In July 1991, the intake and discharge pipelines of a major power plant collapsed. A 60-ft. deep excavation adjacent to several structures sensitive to ground movements was required- for remediation. Based on conventional analyses, the estimated factor of safety against base heave was close to 1. 0 for the required excavation, and there was grave concern for damage to appurtenant structures. A viable reconstruction scheme was developed through the integration of finite element analyses and construction monitoring.

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Dewatering Of A Large Excavation Pit By Wellpoints, M. U. Ergun, M. S. Nalçakan Jun 1993

Dewatering Of A Large Excavation Pit By Wellpoints, M. U. Ergun, M. S. Nalçakan

International Conference on Case Histories in Geotechnical Engineering

An excavation, rectangular in dimensions of 55 m x 95 m at the base and approximately 120 m x 160 m at the ground surface was made possible by the use of multi-staged wellpoint dewatering system. Groundwater table was lowered more than 20 meters using four stage wellpoint system to construct the main wastewater pump station for the city of Izmir. The most significant soil parameter affecting the planning and design of the dewatering work is the coefficient of field permeability, and it has been directly measured by a large scale pumping test at the site. During dewatering and construction …

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Performance Of A Pier Consisting Of Three Sections, Edwin P. Woo, Cetin Soydemir, Thomas K. Liu Jun 1993

Performance Of A Pier Consisting Of Three Sections, Edwin P. Woo, Cetin Soydemir, Thomas K. Liu

International Conference on Case Histories in Geotechnical Engineering

A deteriorated 600 ft. long pier in Quincy, Massachusetts consisting of timber pile supported relieving platform and anchored steel sheet pile bulkhead sections was replaced with a new pier. The majority of the new pier consists of a deadman anchored steel sheet pile bulkhead. Due to the proximity of adjacent structures and another existing pier, two areas along the new pier could not accommodate an anchored bulkhead system. In these two areas, relieving platform and double steel sheet pile wall systems were constructed. Inclinometer data showing horizontal movements in the sheeting during the construction and post-construction periods are presented.

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Performance Of A Semi-Rigid Braced Excavation In Soft Clay, B. H. Lien, H. Abedi, J. A. Ramos, T. G. Porter Jun 1993

Performance Of A Semi-Rigid Braced Excavation In Soft Clay, B. H. Lien, H. Abedi, J. A. Ramos, T. G. Porter

International Conference on Case Histories in Geotechnical Engineering

Construction of a 21-foot wide, 28-foot deep braced excavation in Detroit soft clays has been completed. In order to protect an existing 50-year old tunnel adjacent to the excavation, a semi-rigid, tangent wall earth retention system was constructed to minimize the soil movements. The tangent wall was formed by 118 drilled piers with 42-inch in diameter and 41-foot long. The maximum soil lateral and vertical movements adjacent to the excavation were controlled below a magnitude of 2.0 inches, while bottom of the excavation experienced about 3 inches of heave. This paper presents the design considerations and construction performance of the …

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Reinforced Soil Structure Test Sections In Mountainous Terrain, Pichit Jamnongpipatkul, Yongyuth Taesiri, Voranit Charumas Jun 1993

Reinforced Soil Structure Test Sections In Mountainous Terrain, Pichit Jamnongpipatkul, Yongyuth Taesiri, Voranit Charumas

International Conference on Case Histories in Geotechnical Engineering

Reinforced soil structure test sections have been constructed along the alignment of the highway route no 1149 leading to the top of a mountain in Chiang Rai Province, northern Thailand. The test sections are located on the steep slope of residual soil derived from diorite, divided into two subsections for a total length 9f about 300 m. Their heights vary up to twelve meters. The face slope is 70 degrees, initially protected with soil bags and finally with grasses and creepers. The reinforced element is high tensile strength polymer grid composing of "Tensar" SR 55, SR 80 and SR 110. …

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"Unconventional" Drilled Pier Underpinning, Robin M. Lim, Michael Majchrzak Jun 1993

"Unconventional" Drilled Pier Underpinning, Robin M. Lim, Michael Majchrzak

International Conference on Case Histories in Geotechnical Engineering

An “unconventional” earth retaining system consisting of drilled underpinning piers, was used successfully to underpin a four- story building in Redwood City, California. Considerations to other conventional underpinning systems and their feasibility at the subject site are also examined. An in-depth discussion of the "unconventional" underpinning system selected for the project is presented with details of the construction sequence and difficulties encountered. Post-construction performance of the underpinning system and the relative costs of the “unconventional” underpinning system are also presented.

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Underpinning Of A Tilted Building, A Case History, Ch. Marangos Jun 1993

Underpinning Of A Tilted Building, A Case History, Ch. Marangos

International Conference on Case Histories in Geotechnical Engineering

In the paper, the case history of underpinning of a tilted four-storey building located near Kastoria lake, Greece, is presented. Based on geotechnical investigation results, the causes of tilting and the further behaviour of the building are investigated and the underpinning system is also presented.

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Construction Of Pedestrian Tunnels, Essex Junction, Vt, B. F. Townsend, A. D. Walker Jun 1993

Construction Of Pedestrian Tunnels, Essex Junction, Vt, B. F. Townsend, A. D. Walker

International Conference on Case Histories in Geotechnical Engineering

A combination of innovative tunnel engineering concepts and ground improvement technologies are described as applied to an IBM facility in Vermont, with emphasis on the geotechnical aspects of the construction. By this approach, emergency access and egress tunnels were built through difficult soils beneath the slab on grade of a vibration sensitive manufacturing building, with minimal disruption to daily operations.

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Geotechnology Allows Construction Of Two Cohabirating Projects, W. A. Bischoff, M. L. Larson, S. S. Huang Jun 1993

Geotechnology Allows Construction Of Two Cohabirating Projects, W. A. Bischoff, M. L. Larson, S. S. Huang

International Conference on Case Histories in Geotechnical Engineering

The following case history presents innovative geotechnical solutions which allowed the simultaneous construction of two overlapping projects, by two different contractors, sponsored by different governmental agencies under tight project schedules. A settlement sensitive Light Rail Transit (LRT) line was to cohabitate the same alignment as a new freeway with embankment heights of 27 feet; both of which are on compressible and weak subgrade soils. Construction activities could not impinge on one or anothers project. The geotechnical concepts used allowed the two projects to proceed simultaneously and minimized the impacts of embankment induced settlement on the two LRT tracks. Field monitoring …

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Recognition And Delineation Of A Landslide, Turkey, Lester M. Tyrala Jun 1993

Recognition And Delineation Of A Landslide, Turkey, Lester M. Tyrala

International Conference on Case Histories in Geotechnical Engineering

Geological mapping, geophysical surveys, test pits, and shallow borings were used to identify and evaluate a site containing a landslide complex. An investigation was performed to characterize the extent and nature of the complex, determine the susceptibility to movement, and the potential for impact on a nearby proposed reservoir and dam. The methods of investigation established a relationship between the morphology, geology, and hydrology of the slide complex. The surface of the slide was initially identified by a series of scarps, seeps, and slopes. Seismic refraction and resistivity surveys were performed to determine depths to the basal failure surface and …

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General Report Session No. 6: Case Histories Of Geotechnical Engineering And Rock Engineering, Charles J. Haas Jun 1993

General Report Session No. 6: Case Histories Of Geotechnical Engineering And Rock Engineering, Charles J. Haas

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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General Report Session No. 7: Case Histories Of Soil Improvement, Grouting, Geosynthetics, Dynamic Compaction, Vibroflotation, Blasting, And Other Methods, Donald Anderson, B. G. Rao, S. Yasuda, R. Jewell Jun 1993

General Report Session No. 7: Case Histories Of Soil Improvement, Grouting, Geosynthetics, Dynamic Compaction, Vibroflotation, Blasting, And Other Methods, Donald Anderson, B. G. Rao, S. Yasuda, R. Jewell

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Discussions And Replies Session 7, E. C. Shin, C. A. Dougherty, Aswath V. Rao, J. Blayne Kirsch, Arthur Pengelly, Kou-Roung Chang, Kenji Hayashi Jun 1993

Discussions And Replies Session 7, E. C. Shin, C. A. Dougherty, Aswath V. Rao, J. Blayne Kirsch, Arthur Pengelly, Kou-Roung Chang, Kenji Hayashi

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Foundation Grouting For The Forks Of Butte Powerhouse, K. D. Weaver, T. R. Kolbe, S. J. Klein Jun 1993

Foundation Grouting For The Forks Of Butte Powerhouse, K. D. Weaver, T. R. Kolbe, S. J. Klein

International Conference on Case Histories in Geotechnical Engineering

Construction of a powerhouse on unconsolidated landslide debris materials at the edge of a stream channel in a narrow, steep-sided canyon in northern California entailed application of an unusual combination of grouting techniques to protect the foundation during peak flows. These techniques included permeation grouting, displacement grouting, compaction grouting, and controlled hydrofracture grouting.

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Dynamic Compaction Prepares Supermarket Site, Nathan L. Whetten Jun 1993

Dynamic Compaction Prepares Supermarket Site, Nathan L. Whetten

International Conference on Case Histories in Geotechnical Engineering

This paper presents a case in which dynamic compaction (DC) was used as site preparation for a proposed supermarket. The site was located immediately adjacent to a steep, 15 ft. high slope leading down to the Hudson River. Test borings revealed subsurface conditions consisting of uncontrolled miscellaneous fill extending 10 ft. below river level. Stability evaluations indicated that the slope was unstable under rapid drawdown conditions, and placement of the supermarket at the crest of the slope further decreased its stability. There were also concerns regarding possible differential settlement of the supermarket due to the variability of the fill. Dynamic …

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Use Of Geotextiles In Low Volume Roads — A Case Study, A. V. S. R. Murty, Sudhir Mathur, S. K. Soni, K. Nageswara Rao Jun 1993

Use Of Geotextiles In Low Volume Roads — A Case Study, A. V. S. R. Murty, Sudhir Mathur, S. K. Soni, K. Nageswara Rao

International Conference on Case Histories in Geotechnical Engineering

The application of geotextiles has been well accepted as a construction material in Civil engineering works. However, in India, the utility of geotextiles is very limited to particular areas of application in Civil Engineering such as highways, railways and irrigation projects etc. On an experimental basis, these fabrics have been used as an intermediate layer between subgrade and subbase to serve as a separation and drainage layer in a road constructed on soft subgrade soil. The main objective of field trials was to study the need, relevance and the relative efficacy of the use of geotextiles as compared to the …

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Chemical And Lime Stabilization Of Expansive Clay, L. D. Johnson Jun 1993

Chemical And Lime Stabilization Of Expansive Clay, L. D. Johnson

International Conference on Case Histories in Geotechnical Engineering

Two soil stabilization treatments were performed on highly expansive clay in Fort Sam Houston San Antonio, TX, to reduce the potential for swell. Lime slurry pressure injection is considered primarily a preswell treatment with some clay alteration. Chemical injection using a proprietary potassium based chemical is considered to alter the clay. Both treatments effectively reduced the potential for swell.

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Soft Clay Ground Improvement Of Ningbo International Airport, X. R. Zhu, Q. Y. Pan, K. H. Xie Jun 1993

Soft Clay Ground Improvement Of Ningbo International Airport, X. R. Zhu, Q. Y. Pan, K. H. Xie

International Conference on Case Histories in Geotechnical Engineering

Ningbo International Airport is built on the soft clay ground first in China. It has a runway 3,000m in length and 45m in width. The thickness of soft clay is greater than 32m. The calculating consolidation settlement is 0. 48m, far beyond to allowable limit. The soft clay ground is improved by wick drain and surcharge precompression. The airport has been put in service since July, 1990. The process and the results of a full scale embankment test, the ground improvement and the settlement observation are described. The influence of the smear and the well resistance of the wick drain …

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Soil Improvement Method Using Low Strength Pile With Permeability, Yoshio Wakame, Masato Majima Jun 1993

Soil Improvement Method Using Low Strength Pile With Permeability, Yoshio Wakame, Masato Majima

International Conference on Case Histories in Geotechnical Engineering

In order to reduce differential settlement and prevent heaving of surrounding ground due to fill loading, a new method using low strength pile with permeability has been devised. The pile material have been composed of hydraulic granulated slag and 12-20% cement of slag. After the design method having been presented on basis of model loading test result, soil improvement have been put to practical use with sand drain method. As a result, it have been confirmed that this method has been effective for reduction settlement, prevention heaving and same drainage as sand drain method.

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Field Measurements Of A Diaphragm Wall Foundation, T. Matsui, H. Nakajima, T. Nagano, T. Hosoi, Y. Fukuda, K. Hayashi Jun 1993

Field Measurements Of A Diaphragm Wall Foundation, T. Matsui, H. Nakajima, T. Nagano, T. Hosoi, Y. Fukuda, K. Hayashi

International Conference on Case Histories in Geotechnical Engineering

Field measurements of a small-sectioned diaphragm wall foundation for a highway bridge have been performed to understand the stability of the trench wall during construction. In this paper, a case history on the field measurements of the diaphragm wall foundation during deep trench excavation is presented.

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Soil Improvements Of An Inhomogeneous Reclaimed Ground, Sasumu Yasuda, Hiroshi Suzuki, Hideotoshi Takemoto, Kohi Hayashi, Kazuo Saito, Naomi Ine Jun 1993

Soil Improvements Of An Inhomogeneous Reclaimed Ground, Sasumu Yasuda, Hiroshi Suzuki, Hideotoshi Takemoto, Kohi Hayashi, Kazuo Saito, Naomi Ine

International Conference on Case Histories in Geotechnical Engineering

A coal storage yard for an electric power plant was to be constructed on reclaimed land in northern Japan. As the reclaimed land consisted of loose sand and soft silt, a deep well excavation method, a dynamic compaction method and a sand compaction method were selected to improve clayey grounds, sandy grounds and intermediate grounds, respectively. After the improvement, no obvious settlement and no liquefaction has been induced.

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Improvement Of Soft Clay For 50000 M3 Oil Storage Tank, Shiming Wu, Yunmin Chen, Wei Feng Jun 1993

Improvement Of Soft Clay For 50000 M3 Oil Storage Tank, Shiming Wu, Yunmin Chen, Wei Feng

International Conference on Case Histories in Geotechnical Engineering

A design of soil improvement for building a petroleum storage tank with a capacity of 50000 M3, and its construction are presented in this paper. Mono-axis deep mixing technique was applied for this project. Laboratory and in-situ test on cemented soil both for static and dynamic properties were conducted, based on which analysis of strength for static and seismic loading can be used for the practice of the project.

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