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Preface, Shamsher Prakash
Preface, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Table Of Contents, Multiple Authors
Table Of Contents, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
General Report — Session 5: Case Histories And Failure Of Retaining Structures, Slurry Walls, And Deep Foundations, Alex Sy, Yingwei (Alex) Wu, Jose Matos E Silva
General Report — Session 5: Case Histories And Failure Of Retaining Structures, Slurry Walls, And Deep Foundations, Alex Sy, Yingwei (Alex) Wu, Jose Matos E Silva
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
General Report — Session 6: Geological, Rock And Mining Engineering, Including Underground Structures And Excavations, And Subsidence Of Deltas, Dimitrios Zekkos, Amy L. Guisinger, Edmund Medley, Daniel A. Vellone
General Report — Session 6: Geological, Rock And Mining Engineering, Including Underground Structures And Excavations, And Subsidence Of Deltas, Dimitrios Zekkos, Amy L. Guisinger, Edmund Medley, Daniel A. Vellone
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
General Report — Session 8: Projects Of Washington, District Of Columbia, Maryland And Virginia Forensic Geotechnical Engineering Health Monitoring And Retrofit Of Infrastructure, Sissy Nikolaou, Mary Perlea
General Report — Session 8: Projects Of Washington, District Of Columbia, Maryland And Virginia Forensic Geotechnical Engineering Health Monitoring And Retrofit Of Infrastructure, Sissy Nikolaou, Mary Perlea
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
An Analysis Of Causes Of Urban Landslides In Residual Lateritic Soil, Rajib Kumar Goswami, Baleshwar Singh
An Analysis Of Causes Of Urban Landslides In Residual Lateritic Soil, Rajib Kumar Goswami, Baleshwar Singh
International Conference on Case Histories in Geotechnical Engineering
Landslides in natural slopes of residual soil are a common problem encountered in tropical regions. Guwahati city, located in Assam in the north-eastern part of India, is an urban watershed covered by a number of hills and hillocks that are capped with lateritic soil. Although the slopes originally consisted of hard and strong rocks, their stability have been impaired by weathering, heavy rainfall and seepage flows. Encroachments and cuttings on the hill slopes due to unplanned urbanisation and earthquake tremors have aggravated the problem. A study of landslides was undertaken focussing on degree of weathering of the rock units, their …
An Investigation On Failure Of Embankments In Bangladesh, Zakaria Hossain, Zahurul Islam, Toshinori Sakai
An Investigation On Failure Of Embankments In Bangladesh, Zakaria Hossain, Zahurul Islam, Toshinori Sakai
International Conference on Case Histories in Geotechnical Engineering
The study presents the results of case histories on failure of embankments in Bangladesh based on the field visits to the embankments sites, collected data and information on failure of embankments necessary data related to embankments construction practice obtained from available publications and soil conditions of the breached embankments in Bangladesh. Efforts have been made to discuss briefly the causes of embankment failure and its possible remedial measures. Two recent failures of embankments that occurred in the year 2007 are taken into consideration for a detailed study. For each case, embankment failure mechanism, construction method used for the embankments, soil …
Averted Piping Failure—Earth Dam On Permeable Foundation, Scott Newhouse
Averted Piping Failure—Earth Dam On Permeable Foundation, Scott Newhouse
International Conference on Case Histories in Geotechnical Engineering
“The dam builder has substantial control over the properties of the structure he builds, but he must take the foundation as it is furnished by nature.” (Cedergren, 1989) This paper presents the case of an earth dam built on a permeable foundation where seepage problems nearly caused failure of the dam. Early during first filling, before the lake was even half full, the dam showed significant seepage. Seepage boils appeared at the dam’s toe, indicating the onset of piping failure through the foundation. Although seepage boils indicating a failure mechanism appeared, dam failure was averted. The paper describes the events …
Back Analysis Of The Malakassa Landslide Using The Multi-Block Model, Constantine A. Stamatopoulos, Stavros G. Aneroussis
Back Analysis Of The Malakassa Landslide Using The Multi-Block Model, Constantine A. Stamatopoulos, Stavros G. Aneroussis
International Conference on Case Histories in Geotechnical Engineering
During the early hours of 18-02-1995 a landslide occurred at Malakasa, on the 36th kilometer of the highway joining Greece's main cities, Athens and Thessaloniki. The computed deformed geometry using this model agrees reasonably well with that measured. The back-estimated soil strength of 16o is in the range of the measured values (8-19o). Finally, state-of-the-art stability analyses, using the back-estimated residual soil strength, illustrated that the location of the slip surface can be predicted if it is assumed that only the saturated soil below the water table loses its strength.
Calculation Of Features Of Many Row Pile Landslide Protection Structures, A. L. Gotman, M. A. Suvorov
Calculation Of Features Of Many Row Pile Landslide Protection Structures, A. L. Gotman, M. A. Suvorov
International Conference on Case Histories in Geotechnical Engineering
Results of investigation of pile many row landslide protection structures are shown. Experimental investigations of the behaviour of many row landslide protection structures are carried out on models in trays with the sandy soil under the action of the lateral landslide soil pressure. Based on results of the experimental investigations, the design scheme is improved and the method of calculation of many row pile landslide protection structures is worked out.
Case History Of Labor Accident Due To Slope Failure During Slope Excavation And Its Countermeasure Work, Kazuya Itoh, Sahaphol Timpong, Yasuo Toyosawa
Case History Of Labor Accident Due To Slope Failure During Slope Excavation And Its Countermeasure Work, Kazuya Itoh, Sahaphol Timpong, Yasuo Toyosawa
International Conference on Case Histories in Geotechnical Engineering
About 15 to 20 workers die annually in labor accidents attributed to slope failure or rock fall during slope excavations in Japan. In this paper, a case history of slope failure occurred during the reconstruction of retaining wall is presented. The geotechnical centrifuge model tests are conducted to investigate the mechanism of slope failure. This paper focuses on the influence of wall stiffness and embedded depths of sheet piles or pipes on the prevention of slope failure. Based on the centrifuge test, it was found that the simple temporary wall used during the trench excavation in this case history could …
Evaluation And Stabilisation Of An Embankment At Sebastopol, South Wales, Uk, Austin Weltman, Xun Yuan
Evaluation And Stabilisation Of An Embankment At Sebastopol, South Wales, Uk, Austin Weltman, Xun Yuan
International Conference on Case Histories in Geotechnical Engineering
This paper introduces a slope movement and related railway track movement at Sebastopol, South Wales, UK. The monitoring results including slope movements and groundwater levels are summarised and presented. The slope at Sebastopol has a long history of instability. Because of continued gradual movement of the railway line and accelerated movement in 2004, a series of small diameter ‘Grundomat’ micro-piles were installed alongside the track early in 2005 to increase the shear resistance of the underlying soil and to reduce the rate of slope movement to a small but manageable amount. The slope movements have been continuously monitored since the …
Initial Filling Of Tehri Reservoir — Analysis Of Seepage Data, R. S. T. Sai, S. K. Shukla, G. M. Prasad, R. K. Vishnoi, Sandeep Singhal
Initial Filling Of Tehri Reservoir — Analysis Of Seepage Data, R. S. T. Sai, S. K. Shukla, G. M. Prasad, R. K. Vishnoi, Sandeep Singhal
International Conference on Case Histories in Geotechnical Engineering
Initial Filling of reservoirs in dams, particularly the embankment type, is a very important phase as unusual behaviour / accidents of many dams have been reported during this period. A regular observation / analysis of quantum of seepage vis-à-vis the reservoir level is a significant activity so that any serious development inside the body of dam and foundation / abutments rocks are revealed in advance and remedial measures are taken up timely to prevent catastrophic failures. At Tehri, a 260.5m high earth & rockfill dam has been constructed across river Bhagirathi, a tributary of mighty river Ganga in India. Seepage …
Pit Slope Failure Problems In Goan Iron Ore Mines, Goa, India, A. Santha Ram, S. P. Goyal
Pit Slope Failure Problems In Goan Iron Ore Mines, Goa, India, A. Santha Ram, S. P. Goyal
International Conference on Case Histories in Geotechnical Engineering
The problem of open pit slope stability is a matter of concern when the mining operations go deeper followed by weak strata conditions. In Goa iron ore mines the problem of slope instability has been faced by several mines, after the on-set of monsoon. A review of case studies available on the subject demonstrates that the ground displacement, stress redistribution, effect of ground water, low strength characteristics of the slope forming materials played significant role for the cause of slope failures. Slope monitoring studies indicated that the mechanism of slope failures could be complex and dependent on failure pathways, where …
Predicted Versus Observed Failure Surface: A Case Study, P. K. Basudhar, G. Bhattacharya
Predicted Versus Observed Failure Surface: A Case Study, P. K. Basudhar, G. Bhattacharya
International Conference on Case Histories in Geotechnical Engineering
The paper pertains to the studies undertaken to investigate the efficacy and correctness of a numerical scheme developed by the authors to predict the stability of slopes. As such, a well documented failed test embankment has been reanalyzed using the suggested method for predicting the critical slip surface and the associated factor of safety. A comparison of the predicted failure surface (critical slip surface) with the observed failure surface showed close agreement; the corresponding value of factor of safety was found to be close to unity. Thus, the case study demonstrated that with appropriate choice of the strength parameters the …
Prevention, Mitigation And Engineering Response For Geohazard In Thailand, Adichat Surinkum, Worawoot Tantiwanit, Jarin Tulyatid
Prevention, Mitigation And Engineering Response For Geohazard In Thailand, Adichat Surinkum, Worawoot Tantiwanit, Jarin Tulyatid
International Conference on Case Histories in Geotechnical Engineering
Thailand is situated in SE Asia where most of the area has been under the influence of monsoonal type of weather. Geological settings of the country is believed to be the result of the collision between Indian and Eurasian plates. The collision has great influences on the topographic, weather and tectonic activities of the area for a long time. These factors are closely related to a number of serious geohazards of the area. Such geohazards include landslide and tsunami caused by a large distant earthquake along the Indian – Eurasian subduction zone. Important geohazard cases in Thailand have been discussed …
Probabilistic Finite Elements With Dynamic Limit Bounds; A Case Study: 17th Street Flood Wall, New Orleans, Mohammadreza Rajabalinejad, P. H. A. J. M. Van Gelder, J. K. Vrijling
Probabilistic Finite Elements With Dynamic Limit Bounds; A Case Study: 17th Street Flood Wall, New Orleans, Mohammadreza Rajabalinejad, P. H. A. J. M. Van Gelder, J. K. Vrijling
International Conference on Case Histories in Geotechnical Engineering
The probabilistic approach provides a better understanding of failure mechanisms and occurrence probabilities as well as consequences of failure. Besides, main advantages of the probabilistic design in comparison with the deterministic design are: a more careful, more cost effective, and more reliable design of infrastructures. In the present study a new probabilistic approach is applied to the 17th Street Flood Wall, and its probability of failure under hurricane hazard, considering multiple failure mechanisms is assessed. The Monte Carlo (MC) simulation technique coupled with dynamic limit bounds (DLB) integrated with finite element approach is used. The performance of DLB and MC …
Seepage Through Different Concrete Cut Off Wall Connection Systems Case Study: Karkheh Storage Dam, Zakaria Zoorasna, Amir Hamidi, Ali Ghanbari
Seepage Through Different Concrete Cut Off Wall Connection Systems Case Study: Karkheh Storage Dam, Zakaria Zoorasna, Amir Hamidi, Ali Ghanbari
International Conference on Case Histories in Geotechnical Engineering
Seepage and water flow is one of the most important factors in design of embankment dams. The seepage through the foundation of earth dams can be controlled using the concrete cut off walls. The hydraulic head reduces in connection zone of the cut off wall and core of the dam that results to high hydraulic gradients. As a result, erosion and water leakage may occur. In this regard, the design of concrete cut off wall connection to the clayey core of earth dam is important. In this research, the total flow and the hydraulic gradient are considered to study the …
Stabilization Of A 30 M High Riverbank In Canada With Nails, Plates And Roots, Michael Fabius, Myint Win Bo, Bernardo Villegas
Stabilization Of A 30 M High Riverbank In Canada With Nails, Plates And Roots, Michael Fabius, Myint Win Bo, Bernardo Villegas
International Conference on Case Histories in Geotechnical Engineering
The natural river processes along a 30 m high riverbank of one of the largest tributaries to Lake Superior cause periodic landslides. After arresting toe erosion, local authorities needed to protect the infrastructure at the crest from further damage as the slope continued to flatten towards its long-term angle of repose. A long-term hazard management strategy was applied using the cautionary zone approach (CZA). Design criteria included a target safety factor, no construction impacts, no maintenance and a 75-year design life. The solution drew from 3 technologies: soil nails, laterally loaded piles and biotechnical stabilization. Steel nails, 35 mm diameter, …
The Stability Of Flood Defenses On Permeable Soils: The London Avenue Canal Failures In New Orleans, W. Kanning, S. Van Baars, J. K. Vrijling
The Stability Of Flood Defenses On Permeable Soils: The London Avenue Canal Failures In New Orleans, W. Kanning, S. Van Baars, J. K. Vrijling
International Conference on Case Histories in Geotechnical Engineering
The two failures of the London Avenue Canal floodwalls contributed largely to the flooding of central New Orleans due to hurricane Katrina. In this paper, both failures are analyzed and compared to each other since the flood defenses are both located on permeable soils. Photo’s observation and calculations are used for the analysis. Both failures are caused by the permeable sand layer below the floodwall that allowed high pore water pressures to develop below the floodwall. However, the south breach seems to be caused by the piping failure mechanism and the north breach by loss of stability. At the South …
Google Earth Mapping Of Damage From The Niigata-Ken-Chuetsu M6.6 Earthquake Of 16 July 2007, Robert Kayen, Wm. Clint Steele, Brian Collins, Kevin Walker
Google Earth Mapping Of Damage From The Niigata-Ken-Chuetsu M6.6 Earthquake Of 16 July 2007, Robert Kayen, Wm. Clint Steele, Brian Collins, Kevin Walker
International Conference on Case Histories in Geotechnical Engineering
We describe the use of Google Earth during and after a large damaging earthquake that struck the central Japan coast on 16 July 2007 to collect and organize damage information and guide the reconnaissance activities. This software enabled greater real-time collaboration among scientists and engineers. After the field investigation, the Google Earth map is used as a final reporting product that was directly linked to the more traditional research report document. Finally, we analyze the use of the software within the context of a post-disaster reconnaissance investigation, and link it to student use of Google Earth in field situations.
Investigation Of Landslides And Debris Flows In Tachia Watershed Between Maan Dam And Techi Dam, Chin-Tung Cheng, Jin-Ching Chern, Shian-Jin Chiou, Yen-Hsiang Lin
Investigation Of Landslides And Debris Flows In Tachia Watershed Between Maan Dam And Techi Dam, Chin-Tung Cheng, Jin-Ching Chern, Shian-Jin Chiou, Yen-Hsiang Lin
International Conference on Case Histories in Geotechnical Engineering
The Chi-Chi earthquake and subsequent typhoon events induced severe landslides and debris flows in the watershed of Tachia river. It inflicted severe damage to the power generation facilities and highway links. For the rehabilitation planning, quantitative assessment of landslides, debris flows and river deposits were conducted by using aerial photos and satellite images obtained at six stages of earthquake and typhoon events. The future trends of landslide and debris flow were also investigated by using empirical models. The long-term deposition or scouring was also conducted by numerical simulation. The results show that over 50,000,000 to 70,000,000m3 of sliding volume …
Lessons To Be Learned From Surface Fault Ruptures In Iran Earthquakes, M. K. Jafari, S. M. Moosavi
Lessons To Be Learned From Surface Fault Ruptures In Iran Earthquakes, M. K. Jafari, S. M. Moosavi
International Conference on Case Histories in Geotechnical Engineering
Since Iran is one of the seismically active regions, and many lessons are embedded in the observations of surface ruptures of Iran earthquakes, the use of case histories as a basis for the development of both insights and engineering judgment is considered. In this paper, the importance of earthquake fault rupture hazards are presented, and illustrative examples are used to demonstrate how the hazards associated with surface fault rupture and lessons achieved from field studies are presented for implementing effective engineering designs to mitigate surface fault rupture hazards.
Numerical Modeling Of Columnar Reinforced Ground 1999 Kocaeli Earthquake Case History, C. Guney Olgun, James R. Martin Ii
Numerical Modeling Of Columnar Reinforced Ground 1999 Kocaeli Earthquake Case History, C. Guney Olgun, James R. Martin Ii
International Conference on Case Histories in Geotechnical Engineering
The Kocaeli Earthquake (M=7.4) struck Turkey on August 17, 1999 and caused significant damage along Izmit Bay. Following the earthquake, the authors investigated the field performance at improved soil sites. Of particular interest was the Carrefour Shopping Center that was under construction during the earthquake. The reclaimed site is underlain by strata of saturated soft clays, silts, and liquefiable loose sands. Small-diameter jet-grout columns had been installed at close spacings to reduce settlements and prevent liquefaction-related damage beneath footings and mats. Nonlinear dynamic three-dimensional finite element analyses were conducted to model the reinforced ground at Carrefour. The results show that …
Probabilistic Estimation Of Site Specific Fault Displacements, D. N. Lindberg, J. P. Buck, G. L. Manhart, R. C. Chaney, F. R. Bickner, G. A. Vadurro
Probabilistic Estimation Of Site Specific Fault Displacements, D. N. Lindberg, J. P. Buck, G. L. Manhart, R. C. Chaney, F. R. Bickner, G. A. Vadurro
International Conference on Case Histories in Geotechnical Engineering
The College of the Redwoods (CR) located near Eureka, California would like to upgrade a series of existing buildings that are unfortunately located on secondary faults associated with the active Little Salmon Fault (LSF) zone. In the early 1990’s a deterministic value of the maximum dip-slip displacement that had occurred on one of these secondary faults located beneath the southeast building corner of the former library was measured to be 1.7 feet. This displacement was resolved into approximately 1.5 feet horizontal offset and 0.8 feet of vertical offset, based on the secondary fault plane dip. Geologically, it has not been …
Recent Damaging Earthquakes In Japan, 2003-2008, Robert Kayen
Recent Damaging Earthquakes In Japan, 2003-2008, Robert Kayen
International Conference on Case Histories in Geotechnical Engineering
During the last six years, from 2003-2008, Japan has been struck by three significant and damaging earthquakes: The most recent M6.6 Niigata Chuetsu Oki earthquake of July 16, 2007 off the coast of Kashiwazaki City, Japan; The M6.6 Niigata Chuetsu earthquake of October 23, 2004, located in Niigata Prefecture in the central Uonuma Hills; and the M8.0 Tokachi Oki Earthquake of September 26, 2003 effecting southeastern Hokkaido Prefecture. These earthquakes stand out among many in a very active period of seismicity in Japan. Within the upper 100 km of the crust during this period, Japan experienced 472 earthquakes of magnitude …
Seismic Behaviour Of Water Front Structures With Tyre Chip Backfill, S. P. Gopal Madabhushi, U. Cilingir, S. K. Haigh, H. Hazarika
Seismic Behaviour Of Water Front Structures With Tyre Chip Backfill, S. P. Gopal Madabhushi, U. Cilingir, S. K. Haigh, H. Hazarika
International Conference on Case Histories in Geotechnical Engineering
Water front structures have suffered significant damage in many of the recent earthquakes. One of the primary causes for the poor performance of these classes of structures is the liquefaction of the foundation soil and in some instances liquefaction of the backfill soil. The liquefaction of the soil in-front of the quay wall tends to cause large lateral displacements and rotation of the wall. Full or partial liquefaction of the backfill can result in the increase of lateral earth pressure exerted on the wall that can cause additional lateral displacement of the wall. In this paper numerical analyses of a …
Seismic Response Of Structures With Underground Stories Considering Non-Linear Soil-Structure Interaction, Amir H. Halabian, S. Hamid Hashemolhosseini, Hessam Saldourgar
Seismic Response Of Structures With Underground Stories Considering Non-Linear Soil-Structure Interaction, Amir H. Halabian, S. Hamid Hashemolhosseini, Hessam Saldourgar
International Conference on Case Histories in Geotechnical Engineering
Most of the research conducted for soil-structure interaction analysis of structures are assuming the linear behavior of soil. It is well known that during strong ground excitations the soil adjacent to the structure behaves highly non-linear. The nonlinear soil behavior affects the soil-structure interaction in a complex way especially because of the inadequacy in modeling the unbounded soil medium. In the case where an elastic soil behavior is assumed, the surface motion will be amplified proportionally to the input motion. However, in reality the amplitude and frequency content of the response are modified due to the soil’s stiffness degradation and …
Some Lessons From Yogyakarta Earthquake Of May 27, 2006, Sri Atmaja P. Rosyidi, Mohd. Raihan Taha, Surya Budi Lesmana, Joko Wintolo, Agus Darmawan Adi
Some Lessons From Yogyakarta Earthquake Of May 27, 2006, Sri Atmaja P. Rosyidi, Mohd. Raihan Taha, Surya Budi Lesmana, Joko Wintolo, Agus Darmawan Adi
International Conference on Case Histories in Geotechnical Engineering
The earthquake of moment magnitude, Mw 6.3 in Yogyakarta and Central Java on May 27, 2006 caused widespread death and destruction to the heavily populated and relatively prosperous region. More 5,800 people were killed and robbed hundreds of thousands of residential buildings, and hundreds other structures were also destroyed. This paper presents some observations of the earthquake effects in geological and geotechnical aspects. Yogyakarta region has located on a soft sediment deposit. Therefore, low frequency contents of the seismic wave may have been amplified. The vertical and horizontal PGA at a seismograph station YOGI was 0.183 to 0.303 g …
Using New Signal Processing Techniques In Analyzing Masjed Soleyman Embankment Dam's Explosion Records, M. Davoodi, M. K. Jafari, M. Amel Sakhi
Using New Signal Processing Techniques In Analyzing Masjed Soleyman Embankment Dam's Explosion Records, M. Davoodi, M. K. Jafari, M. Amel Sakhi
International Conference on Case Histories in Geotechnical Engineering
Blasting test studies have one drawback with regard to earthquake studies; they are concerned with vibrations of much smaller amplitude than those normally encountered in earthquakes. Consequently, blasting studies can be used to calibrate dam behavior in a linear elastic range. Accuracy of numerical models should be improved by full scale tests and in situ earthquake records. In this research, first of all a short review of different classical and modern signal processing methods is presented. As it is known, classical signal processing methods, such as FFT and PSD, have many limitations in non- stationary random vibration analysis. Blasting records …