Geotechnical Engineering Commons^™

Passive Earth Pressure Tests On An Integral Bridge Abutment, Theodore A. Thomas Jr., Alan J. Lutenegger

International Conference on Case Histories in Geotechnical Engineering

Passive loading tests were conducted on a rigid concrete retaining wall to study the effect of wingwall orientation on lateral earth pressure development. Loads were applied at the top of the wall to produce a rotational wall movement. Six tests were conducted (three of which are described herein), two with the wingwalls oriented parallel (0°) to the main wall, and two with the wingwalls oriented at an angle of 45° to the main wall, and two with the wingwalls oriented at an angle of 90° to the main wall. Based on these tests the distribution of passive earth pressure at …

Prediction And Performances Of Short Embedded Cast In-Situ Diaphragm Wall For Deep Excavation In Bangkok Subsoil, Wanchai Teparaksa, Narong Thasnanipan, Aung Win Maung, Wei Shixin

International Conference on Case Histories in Geotechnical Engineering

This paper presents a case history of performances and predictions of a diaphragm wall which is subject to serve differently from its initial purpose for which the wall was constructed. The updated requirements associated with the additional excavation created a situation whereby the wall would become short embedded and behave like free-end supported wall. As the wall had been already constructed during the time of modification it was only possible to modify the excavation method and bracing system. Accordingly, the wall stability and possible toe movement were analyzed, to accommodate the updated requirements, by using finite element methods. Continuous inclinometer …

Analysis And Performance Of The Natm Excavation Of An Underground Station For The Athens Metro, Michael Kavvadas

International Conference on Case Histories in Geotechnical Engineering

The paper describes the design methods and summarises the results of the analyses for the recent NA TM excavation of an underground station of the Athens Metro. The non-linear finite element calculations show that for the excavation method used (twin side-wall galleries and a central pillar), the settlements at ground surface are very sensitive to the assumed values of the ground properties as well as the excavation sequence and construction details; it is shown that the settlements can be reduced significantly by increasing the number of the excavation stages and the density of the temporary support measures.

Case Histories Of Designing Tunnel Linings In Seismic Regions, Nina N. Fotieva, Nikolay S. Bulychev

International Conference on Case Histories in Geotechnical Engineering

The original approach to the problem of designing tunnel linings upon the seismic effects consisting in the determination of the most unfavourable stress state in the every lining normal section at different combinations and any directions of long longitudinal and shear waves propagating in the plane of the lining cross-section is described in the paper presented. The analytical methods and corresponding computer programs based on that approach have been developed for the design of tunnel linings of an arbitrary cross-section shape, circular linings inducting the multi-layer ones of the complex of parallel mutually influencing tunnels etc. Two case histories of …

Design, Construction And Monitoring For The Excavation Of Shanghai World Plaza, B. Huang, L. Mohammad, Jianming Zhu, Xiaoping Zhu

International Conference on Case Histories in Geotechnical Engineering

The Shanghai World Plaza is a multi-function building located in Shanghai Pudong New Development Area. It is a steel structure with thirty eight stories (199m) above the ground and three stories of basement. The excavation area of this building is 75m by 100m. The depth of the excavation is 16m to 18m (kernel part). The construction site is covered with soft soils up to a depth of 25m. Main streets, pipelines and existing buildings surround the site. The retaining structure employs a diaphragm with 1m in thickness, 30m in depth and 340m in total length. Three levels of H shaped …

Of Sewers, Sinkholes, And Safes: The Investigation Of The Sea Cliff Incident, December 11, 1995, San Francisco, California, Edmund Medley, Christopher Delp

International Conference on Case Histories in Geotechnical Engineering

On December 11, 1995, a 100-year old brick sewer ruptured in the exclusive Sea Cliff area of San Francisco, during and intense, but not extraordinary rain storm. Storm flow had been constricted by an Overflow Structure 1400 feet downstream of the failure, causing pressurization of the sewer. At the site of the initial failure water was forced through cracks in the sewer wall. Earlier construction of an adit below the brick sewer and the subsequent development of an adjacent sinkhole relaxed the soil confinement, allowing cracks to widen and water to escape. Ultimately, the sewer completely ruptured. Discharge from the …

Field Experiments On Jute Soil Stabilisers, A. K. Gupta, O. P. Yadav, Jai Bhagwan

International Conference on Case Histories in Geotechnical Engineering

The Central Road Research Institute has been constantly working in the area of geotextiles since early 1980s. A number of laboratory studies on evaluation of geotextiles for their suitability for road application, as well as, actual field trials have been carried out by the Institute. Recently, a project was taken up for the development and promotion of jute based geotextiles for road applications. A number of field trials have been carried out using jute based geotextiles for various applications. The paper presents summary of field experiments carried out to improve the soil behavior, improvement in the stability of road side …

A Non Destructive Testing Program For A Group Of Jet Grouting Columns, G. Varosio

International Conference on Case Histories in Geotechnical Engineering

An extensive soil improvement program was developed for the Vultri Container Terminal, Italy, located on an Hydraulic Reclamation Fill. The Office and Warehouse Building, and the Light Tower foundations were supported by Jet Grouting Columns. A testing program was developed, including coring and nondestructive testing on the columns, to verify the as built conditions. Test results show the difficulties in evaluating Jet Grouting properties with a nondestructive approach, mainly related to the complex geometry of the columns. However, the analysis and the comparison of the wave records provided suggestions on the most effective testing procedures, and on the possibility of …

Performance Prediction And Uses Of Pv Band Drains Under The Embankments On Soft Marine Clays Of Bangkok, Kaushik Mukherjee

International Conference on Case Histories in Geotechnical Engineering

The use of prefabricated vertical (PV) drains for the improvement of soft clays is a widely adopted technique today. Vertical drains arc used to accelerate the consolidation under preloading by taking the advantage of higher rate of horizontal flow of water through the soil. The present paper is aimed at the prediction of the performances shown by the ‘Alidrain’, used in the soft marine clays of Bangkok, in the field under embankment loading and in the laboratory in a in-house designed large scale consolidometer, by using a Finite Element model of the transient, axi-symmetric flow problem considering equal strain. This …

Seismic Retrofitting Using Micropile Systems Centrifugal Model Studies, A. Benslimane, I. Juran, S. Hanna, S. Drabkin, S. Perlo, R. Frank

International Conference on Case Histories in Geotechnical Engineering

A series of centrifuge tests were conducted on micropile group and network systems in order to investigate the response to earthquake loading and soil-micropile interaction behavior. Model tests on group and network systems embedded in loose to medium dry sand are described. Micropile bending moment, deflection, and acceleration were measured during testing. Dynamic p-y curves were derived from the measurements for low and high levels of shaking and were compared with the backbone p-y curves for sand recommended by API and other published data. Group and network effects were investigated for different configurations and at different levels of loading. For …

Selection And Design Of Foundations For The I-15/Us 95 Interchange, Stage Ii Improvements − A Case Study, Joy J. Lee, John M. Tehaney

International Conference on Case Histories in Geotechnical Engineering

Parsons Brinckerhoff (PB) is acting as design consultant for the Nevada Department of Transportation (NDOT) for the Stage II Improvements to the 1-15/US 95 Interchange located in Las Vegas, Nevada. The improvements to the interchange include the design and construction of seven new bridge structures. All seven structures will use drilled shaft foundation systems for support. This paper describes the selection and design of the drilled shaft foundation systems for Ramp N-MLK, a sixteen span precast segmental box girder structure. Subsurface conditions and geotechnical data for the project site are described. A comprehensive design methodology was used, including consideration of …

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 …

A Case Study Of The Application Of Lightweight Fill For The Restoration Of An Interchange Ramp, T. C. Kim, S. Q. Ahmad, T. J. Kazmierowski

International Conference on Case Histories in Geotechnical Engineering

A highway embankment and a sanitary sewer were constructed in the City of London, Ontario, Canada. During construction, a manhole settled approximately 1.5m. There were signs of rotational movement and slope instability in the interchange ramp embankment itself. These movements were attributed to insufficient removal of a deep deposit of peat beneath the ramp embankment identified in the original site investigation.

As part of remedial work, additional peat was removed and replaced with compacted sand. Despite these measures, the manhole continued to settle. Monitoring over a period of 30 months showed that the manhole settled by an additional 260mm.

Four …

An Ecotechnical Alternative: An Embankment Of Incinerated Municipal Solid Waste, Ph. Gotteland, G. Bossonney, D. Coulon

International Conference on Case Histories in Geotechnical Engineering

Incineration seems to be one of the best solutions to solve the problem of household refuse disposal. In compliance with European legislation, part of this incinerated refuse, could be used in public works. The authorities are fully aware of the high economic stakes involved, and this is the reason why they would like to control and define the conditions of use of such incinerated refuse. An innovative alternative is presented in this paper, involving the use of slag from Municipal Solid Waste Incineration (I.M.S.W.R.), lightened by the inclusion of old tyres, and strengthened with a layer of geosynthetics, in order …

Research On Crack Depth Measurement In Concrete By Using Rayleigh Waves, Wei Xinjiang, Xia Tangdai

International Conference on Case Histories in Geotechnical Engineering

The possibility of crack depth measurement in concrete by using Rayleigh waves and the feasibility of measurement method are3 introduced in this paper. The principle of crack measurement in concrete by using in-plan Rayleigh waves and the measurement analysis method are studied by using finite clement method.

Shopping Center Saved By Short Aggregate Piers, Thomas W. Blackburn, Tom M. Farrell

International Conference on Case Histories in Geotechnical Engineering

We were faced with an extraordinary geotechnical challenge; our client wanted to support large tilt wa11 buildings and pavements for a 32 acre Commercial Shopping Center on 5 to 8 feet of saturated, I lo 3 blow/foot hydraulically placed fill. To make matters more difficult, the site was in the seismically active Napa Valley. We offered 3 solutions; 2 conventional, and 1 unconventional. Our conventional solutions consisted of: 1) piers founded in the normally consolidated clay below the hydraulic fill, or, 2) over-excavation and replacement of the upper 5 to 8 feet of highly unstable soil. Our unconventional solution consisted …

Alcanena Industrial Waste Landfill − Description Of A Portuguese Case History, L. M. Pissara, N. Guedes, J. Garrido, M. L. Lopes, C. C. Freitas

International Conference on Case Histories in Geotechnical Engineering

Alcanena is a municipality located in the center of Portugal where about 85% of the Portuguese tanning industries are located, representing 65% of the national production. During decades the industrial waste was disposed directly in the soil and the waste waters discharged into the river without any treatment. Following the recent Portuguese environmental policy, the national authorities decided to rehabilitate this area. First, by the construction of a waste water treatment plant (WWTP) and a impermeabilized lagoon for WWTP mud deposition, then by the construction of a landfill for deposition of the tanning scraps and, finally, when the maximum capacity …

Case Histories Of Two Kinds Of Composite Function − Constructing Buildings Over-Crossing Canals, Niu Zhirong, Zhou Changyong

International Conference on Case Histories in Geotechnical Engineering

Two kinds of ground treatment methods of two buildings with 6 stories over-crossing irrigation canal will be inquired in the paper. The author analyses and compares respectively the design methods, action mechanisms, construction methods and treatment effects of sand column, powder deep mixing method (PDM), and chooses the best ground treatment method from the two. Moreover, the reason why the effects of obliterating liquefaction with PDM are little is discussed in the paper.

Design Of Contaminated Dredged Fills Utilizing Geosynthetics, Ronald C. Chaney, Kenneth Demars, Gregory N. Richardson

International Conference on Case Histories in Geotechnical Engineering

Throughout the Great Lakes, about four million cubic yards of sediments are dredged annually to maintain navigation in channels and harbors for commercial, military and recreational users, and as part of environmental projects. CDF design criteria based on contaminant level and partitioning potential of sediments is presented. CDF designs reflect the level of isolation which the sediments under consideration warrant. In this paper the application of geosynthetic components for limiting contaminant pathways in the CDF containment basin and final closure arc discussed.

Effects Of Effluents Of Industrial Waste On Soil Properties (A Case Study Of Nandesari Area, Vadodara), D. L. Shah, A. V. Shroff

International Conference on Case Histories in Geotechnical Engineering

Around Vadodara City (Gujarat) number of chemical industries dispose of water, air and oil based pollutant everyday. The pollution process in soil due to the industrial effluent discharge on to the land and its effect on the geotechnical properties of soil arc discussed in the present case study. Uncontrolled exploitation of the natural resources have resulted in an unanticipated soil behaviour due to environmental degradation. This resulted in an increased interest in the study of environmental geotechnics which is a means of forecasting soil behaviour to the changing environment.

Case Histories Of Foundations. Paper No. Gr-I, Alan J. Lutenegger, Carole L. B. Mitchell

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Case Histories Of Soil Improvement, Grouting, Geosynthetics, Dynamic Compaction, Vibroflotation, Blasting And Other Methods Including Geo Economics. Paper No. Gr-Vii, Steven J. Winter

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Conference Snapshots, Multiple Participants

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.