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 …
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 …
Experimental Investigation Into Natural Base Isolation System For Earthquake Protection,
2013
IIT Kharagpur, India
Experimental Investigation Into Natural Base Isolation System For Earthquake Protection, Srijit Bandyopadhyay, Aniruddha Sengupta, G. R. Reddy
International Conference on Case Histories in Geotechnical Engineering
This paper presents the results of experimental investigations into the performance of a well-designed layer of sand, and layer of sand mixed with shredded tire (rubber) as low cost base isolators. The building foundation is modeled by a 200 mm by 200 mm and 40 mm thick rigid plexi-glass block. The model footing is placed in the middle of a 1m by 1m tank filled with sand. The selected base isolator is placed between the footing and the sand foundation. The whole setup is mounted on the shake table and subjected to sinusoidal motion with varying amplitude and frequency. Acceleration …
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 …
Evaluation Of Liquefaction Potential Of An Earth Dam Foundation Using In Situ Tests,
2013
National Agronomic Institute of Tunisia, Tunisia
Evaluation Of Liquefaction Potential Of An Earth Dam Foundation Using In Situ Tests, Ikram Guettaya, Mohamed Ridha El Ouni
International Conference on Case Histories in Geotechnical Engineering
This paper presents a case study of liquefaction potential assessment carried out under an earth dam foundation in Tunisia. An emphasis was made on the exploration of geotechnical conditions and the interpretation of field tests results collected before and after soil densification using the vibrocompaction technique. The assessment of soil liquefaction susceptibility was made using deterministic and probabilistic simplified procedures developed from several case histories. Conclusively, the obtained results show that before vibrocompaction the soil was prone to the liquefaction hazard. However, after vibrocompaction, a significant improvement of the soil resistance reduces the liquefaction potential of the sandy foundation. Indeed, …
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 …
Estimating Seismic Settlements From Liquefaction And Cyclic Softening And Their Impact To Design Of A School Building,
2013
Kleinfelder, Inc., Stockton, CA
Estimating Seismic Settlements From Liquefaction And Cyclic Softening And Their Impact To Design Of A School Building, James Wetenkamp, Jorge Meneses, Zia Zafir
International Conference on Case Histories in Geotechnical Engineering
Estimation of static and seismic settlements is critical for the design of a structure to assess whether the structure can tolerate given levels of total and differential settlements and angular distortion. The design of a public school building required the estimation of both liquefaction-induced settlement due to the presence of a potentially liquefiable layer, and settlement from cyclic softening of soft clay layers. Tolerable levels of differential settlements for the proposed school building were not to exceed 2 inches across the building. The soft clay had a plasticity index of 12, a liquid limit of 32, and SPT blow counts …
Lessons From The Seismic Performance Of Pile-Supported Bridges Affected By Liquefaction During The M8.8 2010 Maule Chile Earthquake,
2013
Pontificia Universidad Católica de Chile, Chile
Lessons From The Seismic Performance Of Pile-Supported Bridges Affected By Liquefaction During The M8.8 2010 Maule Chile Earthquake, Christian Ledezma
International Conference on Case Histories in Geotechnical Engineering
Ground failure case studies have been the source of the most important advances in geotechnical earthquake engineering over the past 50 years. Documented case histories from the 2010 M8.8 Maule Chile earthquake will, if carefully studied, further advance this field. The 2010 M8.8 earthquake in Chile showed that liquefaction-induced soil-foundation-structure interaction problems are still far from being completely understood. The observed damage and partial collapse of pile-supported bridges like Juan Pablo II, Llacolén, Tubul, La Mochita, and Raqui, is most likely due to the effects of liquefaction-induced lateral and vertical ground displacement, which often causes large ground deformations that impose …
Evaluation Of Site Amplification Of Erbaa, Tokat (Turkey),
2013
Yuzuncu Yil University, Turkey
Evaluation Of Site Amplification Of Erbaa, Tokat (Turkey), Muge K. Akin, Steven L. Kramer, Tamer Topal
International Conference on Case Histories in Geotechnical Engineering
The study area, Erbaa, is one of the largest towns of Tokat with a population of 47000 in the northern part of Turkey. Erbaa is in North Anatolian Fault Zone (NAFZ) and partly located on the Kelkit river plain, also referred to as the Erbaa basin. After the disastrous 1942 earthquake (Ms=7.2), the settlement area was seriously damaged and moved farther southwards of its old place in 1944. Dynamic properties of Erbaa soils were determined and shear wave velocity profiles were prepared to be used in site response analyses as part of a microzonation study. During this process, …
Influence Of Relative Position Of The Tunnels: A Numerical Study On Twin Tunnels,
2013
UVCE, Bangalore University, India
Influence Of Relative Position Of The Tunnels: A Numerical Study On Twin Tunnels, W. Channabasavaraj, B. Visvanath
International Conference on Case Histories in Geotechnical Engineering
The development of cities requires the use of underground area for the construction of transportation infrastructure facilities. Construction of twin tunnels or new tunnel close to the existing ones may be done horizontally, vertically or in inclined manner. In the case of horizontal tunnels the distribution of tunnel load will be more in lateral direction. Since cities are densely concentrated with tall structures, laterally distributed loads will induce settlement in the foundation of the structures. For a particular orientation of tunnels, the soil movement and internal forces in the lining will be affected by both the relative position of tunnels …
Promotion Of Tunneling Performance In Locally Semi-Hard To Hard Conglomerate Lenses, Case Of Esfahan Historical City Subway Project,
2013
Zaminfanavaran (ZAFA) Consulting Engineers Co., Iran
Promotion Of Tunneling Performance In Locally Semi-Hard To Hard Conglomerate Lenses, Case Of Esfahan Historical City Subway Project, Amir Hossein Haghi, Ali Taheri, A. Ehsan Haghi
International Conference on Case Histories in Geotechnical Engineering
The highly inhomogeneous nature of the river deposits in central Esfahan induced unforeseen problems for tunneling of 2×5 km long of middle section of the Esfahan Subway Project. A noticeable phenomenon in these course grained fluvial (river) deposits is the locally cementation of the soil particles by a calcium carbonate binder and formation of some semi-hard to hard conglomerate lenses. This unique phenomenon is named locally as “Sovord” rock and could be seen just in semi-aired regions as central Iran. Two 6.89 m diameter EPBTBM machines were employed to excavate shallow tunnels in the vicinity of fragile structures of the …
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 …
Foundation And Structural Design Of Lock Walls Founded On A Fault Zone,
2013
MWH, Chicago, IL
Foundation And Structural Design Of Lock Walls Founded On A Fault Zone, Rachael Bisnett, Joseph Kovacich, Juan Quiroz
International Conference on Case Histories in Geotechnical Engineering
The Panama Canal Third Set of Locks Project is being constructed within a geologically diverse setting. Of particular interest is the upper chamber of the Pacific Locks Complex, which is 400 meters long and founded on basalt bedrock but crosses a 90 m wide fault zone. After completing the excavation to foundation grade, the fault zone was mapped and drilling investigations, in-situ geomechanical testing, and laboratory testing were performed. The fault zone contains highly fractured, faulted, and brecciated rock types that were grouped into two geomechanical classes, Class I and Class II. Given the extent of the fault zone and …
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 …
Understanding Sinkhole Consequences On Masonry Structures Using Large Small-Scale Physical Modeling,
2013
INERIS, France
Understanding Sinkhole Consequences On Masonry Structures Using Large Small-Scale Physical Modeling, Marwan Al Heib, Huu Luyen Nghiem, Fabrice Emeriault
International Conference on Case Histories in Geotechnical Engineering
Subsidence and sinkhole are one of important geological risk due to the collapse of underground cavities either natural cavities or due to the human activities (such as mines). The impact of the subsidence and sinkhole on the existing structures can be sever and dramatic. The prediction of the level of damage depends on the characteristics of the sinkhole and the characteristics of the structures. A large small-scale physical model is developed by the INERIS in order to improve the understanding of the behavior of individual masonry structures subjected to ground subsidence or the collapse of underground cavities. The masonry structure …
Numerical And Rational Analysis Of Shotcrete Lining For Rock Tunnels Under Effect Of Explosion Loads,
2013
Arab Academy for Science, Technology, and Maritime, Egypt
Numerical And Rational Analysis Of Shotcrete Lining For Rock Tunnels Under Effect Of Explosion Loads, Adel M. Belal, Hazem A. Hassan
International Conference on Case Histories in Geotechnical Engineering
Tunnels in rock media are considered one of the most important types of fortified structures that can be used to resist the progressive development of military destructive weapons. The geological formation of tunnel rock mass has a great influence on the degree of protection to human and weapons. This protection degree is based mainly on both the utilized system of tunnel lining and the type and quality of rock mass which reduces the effect of wave propagation generated by explosion. Shotcrete lining is one of the most commonly used support system used in tunnel lining. Understanding the dynamic response and …
A Case History Of Super-Large Scale Bridge Pile Foundation In Soft Soil,
2013
Southeast University, China
A Case History Of Super-Large Scale Bridge Pile Foundation In Soft Soil, Chao Yang, Guoliang Dai, Weiming Gong
International Conference on Case Histories in Geotechnical Engineering
The Sutong Yangtze River Bridge is the longest cable-stayed bridge in the world with main span of 1088 m. The pile cap is 113.8 m by 48.1 m by 13.3 m under each pylon and the foundation is super-long large-diameter drilled pile groups consisting of 131 piles with the length of 114/117 m and the diameter of 2.8/2.5m. This paper presents the static loading tests on single piles, centrifugal model tests on pile groups, finite element analysis, cap model tests and field monitoring for the super-large scale pile foundation. The results show that: the super-long large-diameter bored pile of Sutong …
Case Of Ultimate Limit State Design And Eurocode 7-1,
2013
Czech Academy of Sciences, Czech Republic
Case Of Ultimate Limit State Design And Eurocode 7-1, Petr Koudelka
International Conference on Case Histories in Geotechnical Engineering
The history of the Limit State Design (LSD) in geotechnics is rather long. The first attempt to implement the semi-probabilistic design method in geotechnics was published probably by Brinch Hansen in 1953. This theory was implemented formally in Czech practice in 1966 but it was opposed by most professionals. The theory was contrary to the former successful Safety Factor Design and objections were targeted especially against the Ultimate Limit State Design (ULSD). The development of Eurocode (EC) 7-1 began at the end of 1970 and met with similar opposition. However, the same problem was solved in a different way with …
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 …
