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Articles 32851 - 32880 of 39978

Full-Text Articles in Engineering

Soil Response During The 1988 Armenia Earthquake, M. K. Yegian, V. G. Ghahraman, G. Gazetas Jun 1993

Soil Response During The 1988 Armenia Earthquake, M. K. Yegian, V. G. Ghahraman, G. Gazetas

International Conference on Case Histories in Geotechnical Engineering

Building damage statistics from the 1988 Armenia earthquake are presented and discussed. These statistics are correlated to the local soil profiles in the two major cities of Leninakan and Kirovakan. The soil amplification effects on building damage during this earthquake are investigated. One-dimensional site response analysis results and valley effects are presented to explain the extent and pattern of damage in the two cities.

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Conference Snapshots, Multiple People Jun 1993

Conference Snapshots, Multiple People

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Disclaimer And Preface - Vol. Iii, Shamsher Prakash Jun 1993

Disclaimer And Preface - Vol. Iii, Shamsher Prakash

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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

Table Of Contents - Vol. Iii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Field Trip Report: To View Effect Of An Earthquake That Happened Almost 200 Years Ago, David Stewart Jun 1993

Field Trip Report: To View Effect Of An Earthquake That Happened Almost 200 Years Ago, David Stewart

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Settlement Of Multi-Story Buildings On Sand Fills, K. J. Osinubi Jun 1993

Settlement Of Multi-Story Buildings On Sand Fills, K. J. Osinubi

International Conference on Case Histories in Geotechnical Engineering

The behaviour of two residential buildings with shallow foundations supported on sand fills with underlying soft alluvial deposits are discussed. Regular settlement measurements were taken for four and seven years on the foundations of the nine-storey and five-storey buildings respectively. Measured settlements have been compared with predictions based on the theory of one-dimensional consolidation. The factors that might have been responsible for the lower predicted settlement values are highlighted.

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Calibrated Dynamic Response Analysis Of Stafford Dam, L. H. Mejia, R. W. Boulanger Jun 1993

Calibrated Dynamic Response Analysis Of Stafford Dam, L. H. Mejia, R. W. Boulanger

International Conference on Case Histories in Geotechnical Engineering

Stafford Dam, an approximately 79-ft high compacted earthfill founded on stream alluvium approximately 40 feet thick, was shaken by the 1989 Lorna Prieta Earthquake. Records of the earthquake motions were obtained from seismographs located at the dam crest and at the right abutment on rock. Two-dimensional dynamic finite element analyses were performed to calibrate a model of the dam using the recorded motions. Excellent agreement between the recorded and calculated response was obtained by appropriate adjustments to material parameters based on shear wave velocity measurements. Various deconvolution methods for obtaining input bedrock motions to calculate the dam response are discussed.

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Seismic Failure Of Barahona Tailings Dam, J. H. Troncoso, A. Vergara, A. Avendaño Jun 1993

Seismic Failure Of Barahona Tailings Dam, J. H. Troncoso, A. Vergara, A. Avendaño

International Conference on Case Histories in Geotechnical Engineering

The seismic failure of Barahona Tailings Dam has been analyzed. Causes of failure were decrease of the shear strength of the slimes and large displacements and breaching of the sand dikes. The dikes were partially founded on the unconsolidated slimes because the dam was built by the upstream method. Liquefied tailings flowed violently down the courses of Barahona creek and Cachapoal River causing heavy destruction over a 50 km long path. It is concluded that the upstream method of construction of tailings dams should not be encouraged in seismic zones; however, it could be considered as an alternative solution, provided …

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Failures Of Quay Walls During Chilean Earthquake Of March 1985, P. Ortigosa, E. Retamal, R. V. Whitman Jun 1993

Failures Of Quay Walls During Chilean Earthquake Of March 1985, P. Ortigosa, E. Retamal, R. V. Whitman

International Conference on Case Histories in Geotechnical Engineering

Extensive damage took place in the quay walls in the Ports of Valparaíso and San Antonio during the Chilean earthquake of March 1985. Different types of retaining structures such as gravity retaining walls built with concrete blocks, sheetpiles and decks on vertical piles were subjected to large shaking ranging from 0.3 - 0.45g at Valparaíso Port to more than 0.6g at San Antonio. Some of the retaining structures collapsed and others behave quite well. In addition, some liquefaction and settlements in the sandy fill below the yards did occur at San Antonio, along with permanent displacements in the fill slope …

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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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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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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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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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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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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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Session 10, 11, 12 − Opening Remarks, Shiming Wu Jun 1993

Session 10, 11, 12 − Opening Remarks, Shiming Wu

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Case History Of Aquifer Thermal Energy Storage (Ates), C. Mirza Jun 1993

Case History Of Aquifer Thermal Energy Storage (Ates), C. Mirza

International Conference on Case Histories in Geotechnical Engineering

Aquifer Thermal Energy storage (ATES) is a relatively new energy conserving technology which enables subsurface seasonal storage of freely available cold of winters and heat of summers for re-use in the opposite season. Thermal energy is stored in aquifers, groundwater serving as the medium of energy transfer. This case history describes an ATES installation for an office building in Ontario. Groundwater from a 10 m thick sandy aquifer at the 60 m depth is pumped from one pair of wells and re-injected, after extraction or addition of heat, into an opposing pair of wells. ATES technology not only conserves non-renewable …

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Preliminary Studies Of Ground Motions At Treasure Island And Yerba Buena Sites During The 1989 Loma Prieta Earthquake, W. D. Liam Finn, Guoxi Wu, Carlos E. Ventura Jun 1993

Preliminary Studies Of Ground Motions At Treasure Island And Yerba Buena Sites During The 1989 Loma Prieta Earthquake, W. D. Liam Finn, Guoxi Wu, Carlos E. Ventura

International Conference on Case Histories in Geotechnical Engineering

Site response analyses were conducted at the Treasure Island site where surface motions were recorded during the Loma Prieta earthquake. The analyses were conducted using a nonlinear dynamic effective stress method which took into account the effects of the liquefaction that occurred at the site. The rock motions recorded at nearby Yerba Buena Island were used as input motions. Computed and recorded ground motions transverse to the direction of wave propagation and associated response spectra were in good agreement. Agreement was also good in the radial direction, except in certain frequency bands higher than 1.25 Hz. Coherence studies showed that …

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Case Histories: Geology, Value Engineering And Deep Foundations In New York Area, S. K. Jain Jun 1993

Case Histories: Geology, Value Engineering And Deep Foundations In New York Area, S. K. Jain

International Conference on Case Histories in Geotechnical Engineering

The geologic and subsurface conditions in the Metropolitan New York area are highly variable and complex. The Building Code of the City of New York (henceforth, The Code) requires soil identification based on their geological history and engineering characteristics. The code is very stringent and it specifies elaborate subsurface exploration, field testing and geotechnical analysis for the foundation design and its installation. In this paper three deep foundation construction case histories in the New York City are presented which emphasize the importance of site geology, subsurface exploration and value engineering.

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A Case History Of Raft Foundation Behavior For A Large-Scaled Building Complex, M. Aoki, M. Maruoka, N. Sahasi, Y. Okamura, Y. Ikuta Jun 1993

A Case History Of Raft Foundation Behavior For A Large-Scaled Building Complex, M. Aoki, M. Maruoka, N. Sahasi, Y. Okamura, Y. Ikuta

International Conference on Case Histories in Geotechnical Engineering

This paper describes the field observation of settlement of a raft foundation for a large scale building complex in Nagoya city in Japan. The complex consists of a 28 story hotel, a 15 story office building and a low-storied banquet hall in the middle all of which are supported on a single 80 m square basement on raft foundation. Since the load on the foundation is non-uniform, the differential settlement of the foundation was investigated analytically, taking into consideration the interaction between the ground and the raft. To confirm the validity of the design, measurements were conducted for about 2 …

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Crack Damage And Treatment Of Low House On Expansive-Contractive Red Clay, Ke Zunjing, Shan Mei Jun 1993

Crack Damage And Treatment Of Low House On Expansive-Contractive Red Clay, Ke Zunjing, Shan Mei

International Conference on Case Histories in Geotechnical Engineering

Red clay distributes widely in China, it can be classified into two kinds: swell- shrinking and non-swell-shrinking red clay. According to the strong strength and low compressibility features of the Expansive-contractive Red Clay (ECRC), it can be used as an excellent natural ground. Sometimes its swell- shrinkage property may cause crack damage to the low house which based on the ECRC. This rupture is quite common and serious, the crack house became dangerous and had to be rebuilt. In China, the main preventive measures against the crack damage are: moisture holding, deep embedment, soil replacement method (sand cushion), sand surrounding …

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Evaluation Of Bearing Capacity Of Friction Pile Based On Uncertainty Of Soil Properties, H. Ochiai, K. Matsui, S. Adachi Jun 1993

Evaluation Of Bearing Capacity Of Friction Pile Based On Uncertainty Of Soil Properties, H. Ochiai, K. Matsui, S. Adachi

International Conference on Case Histories in Geotechnical Engineering

The authors have proposed a method for evaluation of vertical bearing capacity of bored friction pile which might be capable to reflect the uncertainty of soil properties on the evaluation. The rationality of the method is examined from the application to the bridge design in this paper. A vertical bearing capacity of pile foundation is practically estimated by expressions with N-value, in which there are two kinds of uncertainties which depend on the N-values at the estimation points and the coefficient of the bearing capacity expressions. It is, therefore, necessary to improve the accuracy in estimating the bearing capacity that …

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Failure Of Foundation Systems Using Stone Columns, A. Verghese Chummar Jun 1993

Failure Of Foundation Systems Using Stone Columns, A. Verghese Chummar

International Conference on Case Histories in Geotechnical Engineering

The paper presents the case history of the failure of a major foundation system comprising of ground improved by stone column technique. An in-depth analysis of the soil parameters, design and construction details, gives valuable lessons for the precautions to be adopted while implementing stone column technique.

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Failure Of Offshore Concrete Piles During Construction, V.D. S. Raju, R. Sundaravadivelu, V. G. Idichandy Jun 1993

Failure Of Offshore Concrete Piles During Construction, V.D. S. Raju, R. Sundaravadivelu, V. G. Idichandy

International Conference on Case Histories in Geotechnical Engineering

Two offshore piles of 1000 mm diameter with 1 m socketing into rock in 15 m water depth have failed during construction. The analysis of failure considering wave and current forces, structural and foundation capacities and vibration measurement on freshly concreted and well set piles is discussed.

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Field Study Of Foundation Of Extension Project To Tongji University Library In Shanghai, J. G. Dong, Y. P. Qian, G. Lu, D. Y. Huang Jun 1993

Field Study Of Foundation Of Extension Project To Tongji University Library In Shanghai, J. G. Dong, Y. P. Qian, G. Lu, D. Y. Huang

International Conference on Case Histories in Geotechnical Engineering

The extended building to Tongji University Library is composed of two cantilever beam structure towers with height of 50 m and 11 floor. In order not to affect the normal serviceability of the original library the large and deep compensated box foundation is adopted and a diaphragm wall close against box is employed as an anti-permeability veneering structure. Practice in this extension project has shown that compensated foundation is one kind of the best foundations for tall buildings in the areas with dense buildings in Shanghai. This paper studies in detail the distribution of contact pressure beneath box foundation. It …

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Foundation Problems At A Residential Complex – A Case History, U. N. Sinha Jun 1993

Foundation Problems At A Residential Complex – A Case History, U. N. Sinha

International Conference on Case Histories in Geotechnical Engineering

The paper describes a case history in connection with foundation problems at a residential complex on the adequacy or otherwise of the bearing capacity of foundation soil for raising the existing buildings to double storeyed configuration. The study made possible to raise few existing buildings to double storeyed where safe bearing capacity was found adequate and these buildings could reveal good performance since implementation of suggestions.

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Foundation Problems In A Developing City, K. R. Saxena, A. S. R. Swamy, R. S. Murthy Jun 1993

Foundation Problems In A Developing City, K. R. Saxena, A. S. R. Swamy, R. S. Murthy

International Conference on Case Histories in Geotechnical Engineering

Foundation problems are normally associated with type of sub strata, soil, rock or any other foreign material' met with, and/or if choice of foundation is not compatible with them. In developing cities, the development stress is on highly developed congested areas, limiting the sub soil investigation, and plans to have high rise buildings, requiring deep foundations and sometimes execution of these posing site problems. The collapse of a multi-storeyed structure caused, according to geotechnical engineers due to overlooking the existence of a drain and a few cases of "composite" foundations are described.

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Foundation Selection And Construction Performance - Clark Bridge Replacement, D. E. Daniels, V. A. Modeer, M. C. Lamie Jun 1993

Foundation Selection And Construction Performance - Clark Bridge Replacement, D. E. Daniels, V. A. Modeer, M. C. Lamie

International Conference on Case Histories in Geotechnical Engineering

The paper describes the foundation investigation for the Clark Bridge Replacement, which spans the Mississippi River at Alton, Illinois. The subsurface investigation and the design considerations leading to the foundation piling selection are detailed. The construction performances of the selected H-piles and composite piles are described, including the use of pre-construction wave equation analyses to predict the performance of proposed pile hammers, and the use of the dynamic pile driving analyzer during construction to limit driving stresses and prevent pile damage.

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Foundation Strengthening And Protective Measures For Sri Sangameshwar Temple At Kudal Sangam, Karnataka, Devendra Sharma Jun 1993

Foundation Strengthening And Protective Measures For Sri Sangameshwar Temple At Kudal Sangam, Karnataka, Devendra Sharma

International Conference on Case Histories in Geotechnical Engineering

Sri Sangameshwara temple situated at the confluence of two rivers developed noticeable tilt. Also the temple site be inundated by the back waters of the dam during floods. An elaborate plan of dismantling the temple and reconstructing it by the same stone pieces and statuary could be carried through partially only and the sanctum santorum portion housing the ‘Lingam’ had to be retained. Now the entire temple is to be reconstructed as and where it was. The temple was founded on a boulder platform with hetrogeneous river deposits below it. Honouring the constraints of uninterrupted daily worship rituals in the …

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