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Articles 171601 - 171630 of 198032

Full-Text Articles in Engineering

Case History On The Foundation And Site Liquefaction Potential Evaluation For The Renovation Of A One-Hundred Year Old Building, Vassilios K. Magginas Mar 1998

Case History On The Foundation And Site Liquefaction Potential Evaluation For The Renovation Of A One-Hundred Year Old Building, Vassilios K. Magginas

International Conference on Case Histories in Geotechnical Engineering

This case history involves the foundation and site liquefaction potential evaluation for the renovation of a one-hundred-year old building. The subject project is a four story structure with one basement, built of thick masonry walls and supported on shallow foundations. The project site is located in a seismic zone 3 per UBC. The subsurface geology consists of alluvial inter-bedded layers of silt, sand, and clay. Substantial additional loads were considered during the proposed renovation, and thus an extensive study on the foundation and geotechnical aspects of the project were required, including site geology, evaluation of bearing capacity and settlement, evaluation …

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Soil-Nailed And The Tie-Back Wall Construction Using Hollow Nails, Kyle Rollins, Kenneth Murphy, Shaun Dustin, Jerry Bishop Mar 1998

Soil-Nailed And The Tie-Back Wall Construction Using Hollow Nails, Kyle Rollins, Kenneth Murphy, Shaun Dustin, Jerry Bishop

International Conference on Case Histories in Geotechnical Engineering

Excavation support is commonly provided using soil-nailed walls or tie-hack walls. This paper describes two case histories where nails and anchors where installed using a hollow reinforcing bar and a disposable drill bit. A lean grout was pumped through the reinforcing bar as it was driven into the ground. This process created a reinforced grout column with a diameter of about 150 mm. This procedure reduced the time of installation and resulted in cost savings of about 25% in comparison with conventional procedures. The procedure was used successfully to install nails in sandy gravels and silty sands. It was also …

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Organizing Committee, Multiple Members Mar 1998

Organizing Committee, Multiple Members

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Exhibitors, Multiple People Mar 1998

Exhibitors, Multiple People

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 Mar 1998

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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Table Of Contents, Multiple Authors Mar 1998

Table Of Contents, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Participant List, Multiple Participants Mar 1998

Participant List, Multiple Participants

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 (1993), Multiple Authors Mar 1998

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

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Estimating Post-Liquefaction Displacements In Embankment Dams And Priorities Remediation Measures, W. D. Liam Finn Mar 1998

Estimating Post-Liquefaction Displacements In Embankment Dams And Priorities Remediation Measures, W. D. Liam Finn

International Conference on Case Histories in Geotechnical Engineering

Large displacement analysis is used to simulate the failures of flood protection dikes in Hokkaido, Japan, which occurred during the 1993 Kushiro-oki earthquake. These studies served to validate the method of analysis. The analysis was then used to predict displacements in dikes with potential for liquefaction by relating displacements to geometric characteristics of the dikes: height, slopes, and thickness of potentially liquefiable layer. The predictions were verified using dike displacement data from the Nansei-oki earthquake of 1994. The basis for reliable post-liquefaction analysis is a good estimate of the residual strength of the liquefied soils. For this reason, recent developments …

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Foundation Damage Of Structures In Kobe And Remediation, Tamotsu Matsui Mar 1998

Foundation Damage Of Structures In Kobe And Remediation, Tamotsu Matsui

International Conference on Case Histories in Geotechnical Engineering

In this paper, foundation damage of structures in the 1995 Hyogoken-Nambu Earthquake was overviewed, mainly focusing on that of bridges and elevated highways, port and harbor facilities and buildings. Then, the remediation methods and works for damaged foundations were summarized, together with illustrating some examples. Finally, essentials of related subjects and suggestions on seismic design and remediation for foundations of structures were summarized for a further study.

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O-Cell Testings Case Histories Demonstrate The Importance Of Bored Pile (Drilled Shaft) Construction Technique, John H. Schmertmann, John A. Hayes, Thomas Molnit, Lorj O. Osterberg Mar 1998

O-Cell Testings Case Histories Demonstrate The Importance Of Bored Pile (Drilled Shaft) Construction Technique, John H. Schmertmann, John A. Hayes, Thomas Molnit, Lorj O. Osterberg

International Conference on Case Histories in Geotechnical Engineering

Herein we review the Osterberg Cell, or O-cell, method for performing large capacity load tests on bored piles (drilled shafts), and demonstrate how it provides a new opportunity to assess the effects of construction technique. A sampling of 8 case histories, 7 with comparative testing, illustrates the impact of poor technique and thus demonstrates the importance of good construction technique. The poor techniques include inadequate bottom cleanout, failure to use drilling fluids, poor concrete placement, failure to roughen sides, and improper drilling tools. We conclude with a brief description of a recent, world record, 133 MN (15,000 tons) O-cell load …

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Seismic Design Of Cellular Cofferdams, R. Scott Steedman Mar 1998

Seismic Design Of Cellular Cofferdams, R. Scott Steedman

International Conference on Case Histories in Geotechnical Engineering

Sheet pile cellular cofferdams (retaining walls) are robust structures, capable of withstanding significant deformation without collapse. Traditionally their use in the construction process has been associated with temporary works, but increasingly there is a demand to make use of this type of structure as part of the permanent works. However, although the design of cofferdams to resist static loads is relatively well documented, there are few examples in the literature of design approaches for seismic conditions. This paper describes the seismic design process for cellular cofferdams, drawing upon case histories in the US, CK and Japan. Comparisons are made with …

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Barrettes Designed As Friction Foundations: A Case History, Chu-Eu Ho, Ching-Heng Lim Mar 1998

Barrettes Designed As Friction Foundations: A Case History, Chu-Eu Ho, Ching-Heng Lim

International Conference on Case Histories in Geotechnical Engineering

This paper describes the performance of a fully instrumented test barrette subjected to an ultimate loading of 30932 kN. The load transfer characteristics were measured by vibrating wire strain gauges. Rod extensometers recorded the displacements at several locations along the barrette shaft. Test results indicated that substantial loads were carried in shaft resistance. The end bearing component was reduced by poor toe conditions caused by debris accumulation at the trench base. The load - displacement behaviour and factor of safety in barrette foundation design LS discussed. The toad test results of a subsequent working barrette confirmed that the performance of …

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Bearing Capacity Of Footings On Compacted Sand, Alan J. Lutenegger, Michael T. Adams Mar 1998

Bearing Capacity Of Footings On Compacted Sand, Alan J. Lutenegger, Michael T. Adams

International Conference on Case Histories in Geotechnical Engineering

This paper presents the results of footing load tests conducted on compacted sand beds to evaluate the bearing capacity and load-displacement characteristics of shallow foundations. Tests were conducted on square concrete footings with widths of 0.30, 0.61, 0.91, and 1.22 m and with embedment ratios (D/B) of 0, 0.5, and 1.0 to investigate the influence of footing size and embedment on the load-displacement behavior and ultimate bearing capacity. A description of the soil and test procedures used is given and the results of the footing load tests are presented. A discussion of the definition of ultimate bearing capacity and the …

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Cyclic Load-Induced Settlement Of Foundations On Clay, Braja M. Das, Eun Chul Shin Mar 1998

Cyclic Load-Induced Settlement Of Foundations On Clay, Braja M. Das, Eun Chul Shin

International Conference on Case Histories in Geotechnical Engineering

Laboratory model test results for estimating the permanent settlement of a surface strip foundation supported by a saturated clay are presented. The tests were conducted with one model foundation and one clay soil. The model foundation was subjected to an initial static load, and then a cyclic load was superimposed on it. The magnitude of the static load intensity and the amplitude of the intensity of cyclic load were varied. Based on the model test results, relationships for the permanent foundation settlement and intensities of the static and cyclic load are presented.

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Deformation Modulus Of Soil At The Tip Of A Bored Pile, Takahide Horiuchi, Yukihiko Kani Mar 1998

Deformation Modulus Of Soil At The Tip Of A Bored Pile, Takahide Horiuchi, Yukihiko Kani

International Conference on Case Histories in Geotechnical Engineering

In this study, variation with load was analyzed in terms of the settlement/diameter ratio, of deformation modulus Kp of soil at the tip of a precased concrete pile as bored, defined as the slope of a straight line extending from the point of origin of its stress-settlement curve at its tip as determined through a vertical loading test and intersecting with such curve at the point corresponding to the settlement at each load level as applied during such loading test. Data were taken from a series of vertical loading tests conducted on 18 piles. From the study, the deformation modulus …

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Design And Construction Of The Seattle Symphony's Benaroya Hall Above An Old Railroad Tunnel, Carole L. B. Mitchell Mar 1998

Design And Construction Of The Seattle Symphony's Benaroya Hall Above An Old Railroad Tunnel, Carole L. B. Mitchell

International Conference on Case Histories in Geotechnical Engineering

Benaroya Hall, the new home of the Seattle Symphony, is located directly over an old railroad tunnel in downtown Seattle. The railroad tunnel was hand excavated in the early 1900s; the tunnel excavation caused considerable settlement of the buildings and streets above. The tunneling disturbance and subsequent rotting of timber supports resulted in numerous voids in the vicinity of the tunnel. Excavation for the Benaroya Hall removed up to 55 feet of soil overburden and came to within 12 feet of the tunnel crown. The foundations for the symphony hall were required to protect the railroad tunnel from carrying symphony …

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Expansion And Rehabilitation Of The State Fish Pier In Gloucester, Massachusetts, Cetin Soydemir, K.M. Murtagh, R.E. Bertolino, Edward B. Kinner Mar 1998

Expansion And Rehabilitation Of The State Fish Pier In Gloucester, Massachusetts, Cetin Soydemir, K.M. Murtagh, R.E. Bertolino, Edward B. Kinner

International Conference on Case Histories in Geotechnical Engineering

The State Fish Pier in Gloucester, Massachusetts, has been expanded and rehabilitated to provide an upgraded facility to support the local fishing industry. Expansion consisted of a new Finger Pier and solid fill extension of the existing pier. Rehabilitation consisted of replacing a deteriorated wharf with a new higher load carrying wharf. Subsurface conditions ranged from rock outcrops exposed at low tide at some locations to thick marine deposits overlying rock at other locations. Foundation support for the new Finger Pier and rehabilitated wharf consisted of concrete filled steel pipe piles, a portion of which had to he socketed into …

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A Follow-Up Of Two Different Foundation Principles, Sven Hansbo, Leif Jendeby Mar 1998

A Follow-Up Of Two Different Foundation Principles, Sven Hansbo, Leif Jendeby

International Conference on Case Histories in Geotechnical Engineering

In a special lecture held by the senior author at the Int. Conf. on Case Histories in Geotechnical Engineering in St. Louis (Hansbo, 1984) a follow-up was presented of the observations on two nearby buildings founded on deep deposits of soft clay according to different foundation principles. In one case the total load of the building is carried by friction piles with a factor of safety against failure equal to 3 while, in the other case, the load is partly carried by contact pressure at the raft/soil interface and partly by friction piles with a design load equal to creep …

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Ground Modifications By A Combination Of Dynamic Compaction, Consolidation, And Replacement, Jie Han Mar 1998

Ground Modifications By A Combination Of Dynamic Compaction, Consolidation, And Replacement, Jie Han

International Conference on Case Histories in Geotechnical Engineering

Modification of weak soils can be accomplished by dropping a heavy weight onto a ground surface. The mechanisms for improving the ground by this technology can be described as dynamic compaction, dynamic consolidation, or dynamic replacement. The importance of each mechanism at one site is dependent on soil conditions, impact energy, weight dimensions, etc. A case study presented herein demonstrates how each mechanism affects the treatment effectiveness of this technology. The selected site has a mix of cohesive and cohesionless soil layers. A pilot study was conducted before the construction program for the whole site. Evaluation of the treated ground …

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Heavy Crane Foundations On Soft Clay, John R. Davie, Kenneth R. Bell, Mark B. Fitzsimmons, Daniel A. Haggerty Mar 1998

Heavy Crane Foundations On Soft Clay, John R. Davie, Kenneth R. Bell, Mark B. Fitzsimmons, Daniel A. Haggerty

International Conference on Case Histories in Geotechnical Engineering

A very large mobile crane was used to lift a 3,150 kN steam generator through the roof of the containment building of a nuclear power plant. The maximum load on the crane was 19.8 MN, giving a track pressure of almost 600 kPa. Soil conditions were stiff clay underlain by softer clay. This paper describes the bearing capacity and settlement analysis performed to establish a suitable shallow foundation for the crane. The foundation load test confirmed that soil conditions had been adequately defined and that the foundation design was satisfactory.

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Restoration Of Equalization And Aeration Tanks Of Effluent Treatment Plant At The Mysugar Factory, Mandya, Karnataka, India, S. Sudarshan, C. S. Viswanatha, T. S. Nagaraj Mar 1998

Restoration Of Equalization And Aeration Tanks Of Effluent Treatment Plant At The Mysugar Factory, Mandya, Karnataka, India, S. Sudarshan, C. S. Viswanatha, T. S. Nagaraj

International Conference on Case Histories in Geotechnical Engineering

This paper deals with the restoration measures resorted to strengthen the structure and prevent the leakage of the equalization and aeration tanks of effluent treatment plant in a sugar factory. These tanks showed distress at the hydraulic test itself before commissioning due to the failure of the reinforced concrete floor and bund lining on account of loss of support due to excessive deformation of the substratum. Extensive sand piling was resorted to strengthen the substratum before recasting the reinforced concrete floor and bund lining to ensure structural stability and prevent leakage. These tanks are functioning satisfactorily since two years after …

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Settlements Of Neighboring Buildings During Piling Works, A. B. Fadeev, V. N. Paramonov, V. K. Inozemtcev, V. A. Lukin, E. M. Perley Mar 1998

Settlements Of Neighboring Buildings During Piling Works, A. B. Fadeev, V. N. Paramonov, V. K. Inozemtcev, V. A. Lukin, E. M. Perley

International Conference on Case Histories in Geotechnical Engineering

Two case histories of heavy damaging the neighbouring buildings in Sankt-Petersburg during construction the bored piles are presented. The analysis of causes of the damages has shown that ground inflow into the housing tubes due to low strength properties of water saturated liquid-plastic loams is the main cause of additional settlements of existing houses during construction the bored piles of large diameter close to them.

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Case Study On Landslide Investigations In Himalayas, D. V. Singh, Jai Bhagwan Mar 1998

Case Study On Landslide Investigations In Himalayas, D. V. Singh, Jai Bhagwan

International Conference on Case Histories in Geotechnical Engineering

The great Himalayan mountains are a majestic cluster of several, more or less parallel, hill ranges intervened by numerous vallies and extended plateaus. At the two ends of Himalayan ranges, other mountain ranges converge. Burmese ranges are in the Eastern and Karakoram-Hidkush mountain ranges in the North-Wester end. The individual hill ranges generally present a steep slope towards the plains of India and are more gently inclined towards the north. There are large variations in the geological features of different areas, however, the common phenomena in the landslides occurrence is that they are generally induced by rainfall. In this paper …

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Geotechnical Problems And Treatments Of Weathered Rock Seams Occurring In The Foundation Of Karjan Dam, Western India, Indra Prakash, A. B. Vyas Mar 1998

Geotechnical Problems And Treatments Of Weathered Rock Seams Occurring In The Foundation Of Karjan Dam, Western India, Indra Prakash, A. B. Vyas

International Conference on Case Histories in Geotechnical Engineering

The Karjan dam is located on the Deccan Basalt flows of Cretaceous - Eocene age in the Narmada valley in Gujarat state. A characteristic feature of the basalt flows in this area is conspicuous presence of a number of sub-horizontal weathered rock seams posing the foundation problems of settlement, sliding and seepage. Concrete shear keys have been provided to increase the sliding stability of dam blocks besides other remedial measures. Additional curtain grouting has been done after completion of the dam to reduce seepage.

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Lessons Learned From The Analysis Of A Wet Core Dam, David J. Kerkes Mar 1998

Lessons Learned From The Analysis Of A Wet Core Dam, David J. Kerkes

International Conference on Case Histories in Geotechnical Engineering

Wadaslintang Dam, constructed for the Government of Indonesia's Directorate of Irrigation, was completed m 1987 and stands approximately 120 m (394 ft) high at the maximum section with a crest length of about 700 m (2,296 ft). At the time of its completion it was the largest dam ever constructed using the wet core method of construction. Consequently, the project data constitutes a valuable case history of a large dam constructed with a soil core when it was impossible to achieve conventionally accepted standards for placement and compaction of the core zone material. The instrumentation data obtained during construction provides …

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Pile Design Procedure For Stabilizing Channel Slopes, Richard L. Bateman, Francke C. Walberg Mar 1998

Pile Design Procedure For Stabilizing Channel Slopes, Richard L. Bateman, Francke C. Walberg

International Conference on Case Histories in Geotechnical Engineering

A case history is presented for slope stabilization of channels using piles. The Kansas City District, Corps of Engineers has used various pile designs and types of piles for projects along the Blue River Channel in Kansas City Missouri to stabilize sections of unstable channel slopes in previous slide areas, since June of 1986. Low existing soil shear strengths and limited rights-of-way precluded use of more conventional stabilizing methods. Although a pile analysis method had been used for initial projects, with several piles instrumented with slope indicator devices, an improved analysis method was needed. In July of 1994, through a …

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Repair Of Scour Holes And Levees After The 1993 Flood, Mary P. Perlea, Robert L. Pearce, Kathleen E. Lust, Charles W. Detrick Mar 1998

Repair Of Scour Holes And Levees After The 1993 Flood, Mary P. Perlea, Robert L. Pearce, Kathleen E. Lust, Charles W. Detrick

International Conference on Case Histories in Geotechnical Engineering

The record high water during the summer of 1993 significantly impacted the flood control levee structures in the U.S. Army Corps of Engineers, Kansas City District. Scour holes in the levees and their foundations reached bedrock, up to 75 feet deep in some places, and extended up to 2,000 feet landward of the landside toe on lengths reaching 2,100 feet along selected levee embankments. Different methods used by the Corps of Engineers to repair the scoured levee embankment and foundation soils, their hydraulic impact on river stages, and the efficiency of different methods are presented. The methods discussed consist of: …

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Seismic Evaluation, Soil-Cement Mix Wall And Outlet Pipe Installation, Ivins Bench Dam, Utah, Russell L. Owens Mar 1998

Seismic Evaluation, Soil-Cement Mix Wall And Outlet Pipe Installation, Ivins Bench Dam, Utah, Russell L. Owens

International Conference on Case Histories in Geotechnical Engineering

An inspection of Ivins Bench dam and reservoir was performed following a 5.8 magnitude (Mw) earthquake in southern Utah. Sand was observed flowing from the drainage collection system and the Utah Division of Dam Safety requested that the reservoir be drained and the embankment repaired. Dames & Moore evaluated the liquefaction potential of the embankment and concluded that the embankment was not suitable for maximum storage. A repair concept using a soil-cement mix wall was developed and a dynamic stability analysis was performed using the computer program PLAC. The dynamic analysis indicated that the soil-cement wall would improve …

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Stage 1 Geotechnical Studies For Interstate 15 Reconstruction Project, Salt Lake County, Utah, K. N. Gunalan, Thomas S. Lee, Si Sakhai Mar 1998

Stage 1 Geotechnical Studies For Interstate 15 Reconstruction Project, Salt Lake County, Utah, K. N. Gunalan, Thomas S. Lee, Si Sakhai

International Conference on Case Histories in Geotechnical Engineering

Interstate 15 Reconstruction Project includes rebuilding of 137 bridges; widening the existing three general purpose lane roadway to four general purpose lane with a HOV lane and an auxiliary lane roadway, and other associated work such as converting the existing diamond interchanges to single point urban interchanges (SPUI). The project will be built under a design-build procurement process and is anticipated to be completed in 4 ½ years by October of 2001. The subsurface soils beneath the corridor consist of lake deposits (Lake Bonneville), namely soft to medium stiff plastic clays, silts and loose to medium dense sands ranging in …

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