Field Testing Of Crushed Ignimbrite For Seismic Retrofit Of Matahina Dam,
2013
URS Corporation, Oakland, CA
Field Testing Of Crushed Ignimbrite For Seismic Retrofit Of Matahina Dam, Lelio H. Mejia
International Conference on Case Histories in Geotechnical Engineering
The performance of zoned embankment dams depends on the ability of filter and drain zones to prevent seepage erosion and piping of impervious materials, while providing adequate internal drainage. Because cracking of filter and drain zones might compromise their function, special care is typically exercised to build such zones of cohesionless materials that are unable to support cracks. Limited information is available on the cracking susceptibility of filter and drain materials manufactured by rock crushing. This paper presents a case history of field and laboratory testing of a crushed ignimbrite rock to evaluate its suitability as filter and drain material …
Over Eight Decades Old “Young” Landslide – A Case Study,
2013
Central Road Research Institute, India
Over Eight Decades Old “Young” Landslide – A Case Study, Kishor Kumar, P. S. Prasad, Anil Kathait, Indervir Singh
International Conference on Case Histories in Geotechnical Engineering
Shirobagad also named as Kaliasaur Landslide was developed in the year 1920 at kilometer-147 on National Highway – 58 (earlier named as State Highway - 45) at latitude 300 14’ 30” N and longitude780 53’ 57” in Garhwal region of western Himalaya. This landslide has been investigated by a number of organizations in India and a wealth of data has been generated mainly on geological aspects. Central Road Research Institute has also investigated this landslide during 2007-2011 covering geological as well as geotechnical aspects. The study area basically encompasses metavolcanis and variants of quartzite rock (e.g. pink and white quartzite) …
Self Hardening Slurry Wall Installation By Hydromill At The Herbert Hoover Dike – An Innovative Solution,
2013
TREVIICOS, Charlestown, MA
Self Hardening Slurry Wall Installation By Hydromill At The Herbert Hoover Dike – An Innovative Solution, Mario Mauro, Carlos Morales, Jeff Taylor
International Conference on Case Histories in Geotechnical Engineering
In 2007 the US Army Corps of Engineers classified the Herbert Hoover Dike in Florida as a DSAC 1 dam, and started the implementation of one of the largest dam rehabilitation projects in the nation. The construction of the cutoff wall is a key feature of this rehabilitation work to upgrade the dike to current dam safety criteria. The cutoff wall installation is currently being completed on Reach 1, which extends from Port Mayaca to Belle Glade, under a Multiple Task Order Contract based on performance specifications and stringent verification criteria. For the construction of the cutoff wall TREVIICOS selected …
Stability Analysis Of The Serchio River Flood Plain Embankments (Tuscany, Italy),
2013
University of Pisa, Italy
Stability Analysis Of The Serchio River Flood Plain Embankments (Tuscany, Italy), Nunziante Squeglia, Barbara Cosanti, Diego C. F. Lo Presti
International Conference on Case Histories in Geotechnical Engineering
Following the geotechnical characterization of 30 km long flood - plain embankments of the Serchio River (Tuscany – Italy), a number of numerical analyses have been carried out. The embankments have been constructed since the XVIII century and have experienced several failures in the years (the last in December 2009). The geotechnical characterization of the river embankments and the 2009 flood are described in a companion paper in this Conference. This paper shows the results of numerical analyses that have been carried out for various purposes. More specifically, the numerical analyses were carried out a) to clarify the causes of …
Ground Motion Amplification From Vertical Propagation Of Earthquake Waves,
2013
University of Colorado, Denver, CO
Ground Motion Amplification From Vertical Propagation Of Earthquake Waves, Nien-Yin Chang, Roger L. Torres
International Conference on Case Histories in Geotechnical Engineering
The paper is directed to follow a procedure where seismic responses are identified and recommendations to proceed with their applications are made quickly and economically, before engaging in a complex analysis. It is not intended for selecting design soil parameters or earthquake parameters for the final design of any specific dam. A selected earthquake accelerogram will produce response accelerations and strains that will cover a significant variety of accelerograms in terms of severity of earthquake damage to an earth dam. Scaling-up and scaling-down the selected outcrop motion broadens the spectrum of seismic response analyses using simple and effective SHAKE program …
Lateral Movements Of A Bridge Abutment Due To Compressible Foundation Soils,
2013
MERO, Ontario Ministry of Transportation, Canada
Lateral Movements Of A Bridge Abutment Due To Compressible Foundation Soils, Alper Turan, Tony Sangiuliano, M. Shahria Alam, M. Hesham El Naggar
International Conference on Case Histories in Geotechnical Engineering
Highway approach embankments are often constructed over weak and compressible soils. The consolidation settlements induced by the embankment loads are known to result in downdrag forces and lateral forces on the piles supporting the bridge abutments. Several approaches are commonly employed during construction of highway bridges in Ontario in order to reduce these forces. These approaches include: preloading and surcharging to achieve the anticipated settlements prior to the installation of abutment piles; application of lightweight fill materials such as expanded polystyrene and expanded pelletized blast furnace to reduce embankment loads; and measures to expedite pore water pressure dissipation such as …
The Consolidation Behavior Of The Clay-Core In A Rock Fill Dam — Atatürk Dam Case Study,
2013
Istanbul Technical University, Turkey
The Consolidation Behavior Of The Clay-Core In A Rock Fill Dam — Atatürk Dam Case Study, Atila Sezen, M. Atilla Ansal
International Conference on Case Histories in Geotechnical Engineering
Unexpectedly large settlements occurred in the 165 meter high clay core of Atatürk Dam during the reservoir filling stage. An investigation was conducted based on laboratory experiments and numerical analysis. Consolidation tests were performed on compacted samples under stress levels expected to take place in the field by considering the possible factors affecting the consolidation behavior. The experimental findings were used to model the observed settlements based on a parametric study and by back-calculation. The total expected settlements were determined to be in the order of 16.0 m. While a good fit was captured between the observed and modeled settlements …
Influence Of Dam And Foundation Discountinuities Using Discountinuum Approach — A Case Study,
2013
Gautam Buddha University, India
Influence Of Dam And Foundation Discountinuities Using Discountinuum Approach — A Case Study, Shilpa Pal, Dilip K. Paul
International Conference on Case Histories in Geotechnical Engineering
Dam-foundation interaction plays an important role in the design and analysis of concrete gravity dams as has been reviewed from the failures of dams in the literature. The objective of the study is to understand the behavior of a concrete gravity dam taking into account the effect of dam and foundation discontinuities using three-dimensional Distinct Element Code. Different models have been formulated considering the complexities involved in the modeling of the dam structure, dam-foundation system and the results have been compared. Modeling the dam with the discontinuity in the form of crack which runs through the concrete section has a …
A 2-Dimentional Approach For Numerical Modeling Of Seismic Gravel Drains In Liquefiable Grounds,
2013
Golder Associates Ltd., Canada
A 2-Dimentional Approach For Numerical Modeling Of Seismic Gravel Drains In Liquefiable Grounds, Mahmood Seid-Karbasi, Roberto Olivera, Upul Atukorala
International Conference on Case Histories in Geotechnical Engineering
Liquefaction of water saturated granular soils is one of the major risks thai affect the safety and earthquake pcrfonnancc of infraSlmC\urc such as bridges, dams, ports, and lifelines in various parts of Ihe world. The seismically-induced ground deformations arc often Ihe main concern when liquCr:1cl ion occurs in significant zones of an earth Sinlcturc or soil foundat ion. Recent studies ineluding field data, centrifuge model testing and numerical investigations suggest that one of the promising measures 10 alleviate large earthqu.ake-induced deformat ions and ground failures is by installing stone columns and/or gravel drains. Design of such treatment scheme needs to …
Bank Instability Problems Associated With The Riverside Construction,
2013
Marino Engineering Associates, Inc., Urbana, IL
Bank Instability Problems Associated With The Riverside Construction, Gennaro G. Marino, Abdolreza Osouli
International Conference on Case Histories in Geotechnical Engineering
In this case study, the sliding of a riverbank during construction of a water intake facility in Tennessee was investigated and analyzed. The construction of the project involved the installation of 2-36 in. diameter intake pipes from the wet well to the river inlet which were 290 ft apart. An open cut excavation from the river inlet to the riverbank toe was used to connect the inlet to the tunnel-installedintake pipes on the land side. During the excavation, a 25 ft wide slide, which 4 months later widened by another 15 ft, developed to the crest of the road on …
Ground Deformations Observed After 23.10.2011 MW 7.2 Van Earthquake (Turkey),
2013
Yuzuncu Yil University, Turkey
Ground Deformations Observed After 23.10.2011 MW 7.2 Van Earthquake (Turkey), Mutluhan Akin, Ali Ozvan, Muge K. Akin, Tamer Topal
International Conference on Case Histories in Geotechnical Engineering
A destructive earthquake with a moment magnitude of 7.2 occurred in the north of the Van province (Turkey) on 23rd October 2011 at 13:41 local time and caused approximately 600 deaths and more than 4000 injuries. Many damaging aftershocks were recorded for more than a month after the main shock including a triggered earthquake (Mw 5.6) located in the southern district of Van, namely Edremit, on November 9th, 2011 which caused additional damage and casualties. After the Mw 7.2 Van earthquake, earthquake-induced ground deformations such as liquefaction and lateral spreading were extensively observed around the shores of Lake …
Liquefaction Of Mine Tailings,
2013
Southern Illinois University, Carbondale, IL
Liquefaction Of Mine Tailings, Vijay K. Puri, Todd R. Kostecki
International Conference on Case Histories in Geotechnical Engineering
Liquefaction of mine tailings is known to occur during cyclic, quasi-static & static loading cases but is still a relatively misunderstood concept because tailings dam failures continue to occur. In the worst case scenario the results are high costs, hindered public perception, environmental cleanup and worst of all, the loss of life. A better understanding of this issue is essential for any engineer associated with the mining and/or geotechnical industry, and in particular tailings dam construction and maintenance. This paper presents the liquefaction concept, some case histories dealing with failure of mine tailings dams, available testing methods and some dated …
Spectral Attenuation Characteristics Of Strong Ground Motions In East-Central Iran Using Theoretical Data,
2013
Islamic Azad University, Iran
Spectral Attenuation Characteristics Of Strong Ground Motions In East-Central Iran Using Theoretical Data, Majid Mahood, Hossein Hamzehloo
International Conference on Case Histories in Geotechnical Engineering
Ground-motion prediction equations are an essential element of PSHA. In seismic hazard analysis, attenuation calculations determine how quickly ground motions decrease as the distance from a seismic event increases. The estimation of ground motion for future earthquakes as a function of magnitude and distance is an important problem from earthquake engineering point of view. This article presents spectral equations for the estimation of horizontal strong ground motions caused by shallow crustal earthquakes with magnitude range of Mw 5.0 to 7.4 and distance to the surface projection of the fault less than 100 km for theoretical (simulated) records. The reason …
Modified Value Of Rock Quality Designation Index Rqd In Rock Formation,
2013
Housing and Building National Research Center (HBRC), Egypt
Modified Value Of Rock Quality Designation Index Rqd In Rock Formation, Ahmed T. M. Farid
International Conference on Case Histories in Geotechnical Engineering
The rock quality designation, RQD, is a commonly index used in the description of rock mass quality. This RQD, index value is used to predict the engineering properties of the rock strata under study. The RQD index value was introduced for the engineering applications, such as mining and geotechnical engineering. Calculating of RQD index for rock formation is a great part due to its simplicity. However, this also leads to a number of limitations, including among other, a dependency of RQDm value on the borehole orientation and on the selected threshold value for the minimum intact core length. In this …
Baltimore Red Line Project: An Overview Of The Cooks Lane Tunnel,
2013
AECOM, Boston, MA
Baltimore Red Line Project: An Overview Of The Cooks Lane Tunnel, Mohsen G. Kashi, Verya Nasri
International Conference on Case Histories in Geotechnical Engineering
The Maryland Transit Administration’s Baltimore Red Line is a proposed 14.1-mile east-west Light Rail Transit (LRT) line connecting the areas of Woodlawn, Edmondson Village, West Baltimore, downtown Baltimore, Inner Harbour East, Fells Point, Canton and the Johns Hopkins Bayview Medical Centre Campus. Red Line has two tunnel segments namely, the Downtown and the Cooks Lane Tunnels. The Cooks Lane Tunnel (CLT) is the shorter of the two tunnels and will connect the proposed at-grade LRT segment running alongside I-70 with the at-grade LRT segment along Edmondson Avenue. The western CLT portal will be west of the intersection of North Forest …
Numerical Analysis To Examine The Effect Of Landslides On Tunnels,
2013
Nippon Koei Co., LTD. Research and Development Center, Japan
Numerical Analysis To Examine The Effect Of Landslides On Tunnels, Keiichi Ota, Senro Kuraoka, Toshiya Takeshi
International Conference on Case Histories in Geotechnical Engineering
In the vicinity of known landslide zones, tunnel routes should be designed such that the distance between the landslide and the tunnel is sufficient to avoid adverse impact of the landslide on the tunnel. This requires a good understanding of the effects of the landslide on the tunnel. We modeled the ground surrounding the tunnel and the landslide using numerical analysis to evaluate the quantitative effect of the tunnel offset from the landslide on ground stresses and displacement of the ground surface and tunnel crown. We considered the effects under different ground conditions and examined two different cases, when the …
Slope Stability Analysis Of The Working Level And Final Slope In The Surface Mine Of Marls Near 'Hani I Elezit',
2013
University of Tetovo, Macedonia
Slope Stability Analysis Of The Working Level And Final Slope In The Surface Mine Of Marls Near 'Hani I Elezit', Idaver Huseini, Januz Mehmeti, Nexhmi Krasniqi, Ahmet Bytyçi, Semijal Hasani-Ziberi
International Conference on Case Histories in Geotechnical Engineering
The future of Kosovo’s economic development relies on the exploration of natural resources, particularly, mining. Great importance has been placed on the exploitation of these resources via the surface utilization of marls. Marls being the prevalent raw material for cement production. Since the beginning of 20thcentury, great achievements have been made in the geo-techniques field, leading to the remarkable progress in the art of mining.This paper through the limit equilibrium solution examines the optimization of parameters for slope stability and presents the findings of the on-site research and lab workings conducted on the open-pit mines of marls near the cement …
Three Dimensional Numerical Analysis For Soft Ground Tunneling,
2013
AECOM, New York, NY
Three Dimensional Numerical Analysis For Soft Ground Tunneling, Navid Allahverdi, Verya Nasri
International Conference on Case Histories in Geotechnical Engineering
This paper presents the methodology and results of comprehensive three-dimensional finite element analyses which were performed to assess the potential impacts of tunneling under an existing subway tunnel as well as potential impact of tunneling under an existing bridge. The finite element models took into account all relevant components of the construction process including the soil behavior, shield tunneling, precast concrete segmental lining and the tail void grouting. The models also accounted for stage construction and detailed shield-driven tunnel boring machine (TBM) processes including applying balancing face pressure as well as injecting bentonite slurry through the TBM shield. This study …
Geotechnical Forensic Investigation Of Observed Cracks On A Building In Tallahassee, Florida,
2013
Geosyntec Consultants, Jacksonville, FL
Geotechnical Forensic Investigation Of Observed Cracks On A Building In Tallahassee, Florida, Rutuparna Joshi, Kwasi Badu-Tweneboah, David Riotte, Rachel Klinger, Aaron Cohen
International Conference on Case Histories in Geotechnical Engineering
In July 2010, two vapor extraction wells were installed about 15 feet from a building at an angle of 50 degrees to the horizontal using rotosonic drilling technique (RDT). In June 2011, a crack approximately 0.5 inch wide on the wall of the building was reported. Several other small cracks were observed on the building following inspection by the authors. The owner of the building expressed concerns that the rotosonic drilling was the cause of the cracks and wanted assurance that subsequent drillings would not exacerbate the problem. Geotechnical forensic investigation was performed to evaluate the potential cause(s) of cracking …
Probabilistic Three-Dimensional Model Of An Offshore Monopile Foundation: Reliability Based Approach,
2013
Aalborg University, Denmark
Probabilistic Three-Dimensional Model Of An Offshore Monopile Foundation: Reliability Based Approach, M. J. Vahdatirad, Lars Vabbersgaard Andersen, Lars Bo Ibsen, J. Clausen, J. D. Sørensen
International Conference on Case Histories in Geotechnical Engineering
When wind turbines are to be installed offshore, expensive geotechnical in-situ tests are carried out at the location of each turbine and only a quantile value (typically the 5% quantile) of the measured strength parameters is used as design parameter, e.g., the 5% quantile value of the undrained shear strength of the soil. Typically, measurement, statistical and model uncertainties are not taken into account in code-based, deterministic design. Hence, current methodology based design may be expensive, but the reliability of the foundation is unknown. Instead, a reliability-based design process based on stochastic analysis of the soil parameters is proposed to …
