A Case History Of Deep Excavation In Doha,
2013
Hyder Consulting Limited, Hong Kong, China
A Case History Of Deep Excavation In Doha, L. Tony Chen
International Conference on Case Histories in Geotechnical Engineering
The Doha high-rise tower consists of a 4 level basement which required an excavation depth of 16m along the site perimeter. Minimization of impact of excavation-induced ground movements on the adjacent structures and underground utilities was one of the major considerations in the design and construction of the excavation and its temporary retaining system. The temporary retaining system initially consisted of anchored secant pile walls with toe grouting along the entire site perimeter. After excessive movement was detected on one section of the southern wall, inclined steel bracing was installed inside the excavation as a remedial measure to provide additional …
Accumulation Of Rainfall In The Permeable Fill Behind A Soil Nail Wall,
2013
Sharif University of Technology, Iran
Accumulation Of Rainfall In The Permeable Fill Behind A Soil Nail Wall, S. Mohsen Haeri, Mohammadhasan Sasar, Kioumars Afshari
International Conference on Case Histories in Geotechnical Engineering
TOOBA deep excavation project was conducted in a densely developed area in the North West of Tehran, capital of Iran, to provide space for 4 basement levels for multiple buildings around the already functional TOOBA tower. Besides excavating on 3 sides of TOOBA tower, this project involved excavation to the depths varying from 9 to 28 meters depending on the sloping ground condition. A 5 story school building and a 2 story residential building abut the excavation boundary. Previous experience of constructed soil nail walls in cemented soils of Tehran indicated relatively small wall deformations. Therefore, except for the retaining …
Application Of Jacket Pack Anchor (Jp Anchor),
2013
Shinhwa Soil Tech. Co., Ltd., South Korea
Application Of Jacket Pack Anchor (Jp Anchor), Kim Tae-Seob, Cho Yoon-Ju
International Conference on Case Histories in Geotechnical Engineering
Jacket Pack Anchor(JP Anchor) is applied the irregular layer that general ground anchor is difficult to be applied such as soft layer(SPT-N values of less than 20) or gravel layer that grout lost. It makes sure of the pullout resistance required in these layers by the certain grout bulb formation and expansion effect. Thereby, Jacket Pack Anchor that is a new concept makes possible the construction improving and the cost saving in the excavation site. From the field test results, it was observed that the pullout resistance of Jacket Pack Anchor was about 84% greater than that of general ground …
Behavior Prediction And Monitoring Of A Deep Excavation In The Historic Center Of Brescia,
2013
University of Brescia, Italy
Behavior Prediction And Monitoring Of A Deep Excavation In The Historic Center Of Brescia, Alex Sanzeni, Francesco Colleselli, Moira Mino, Alberto Merlini
International Conference on Case Histories in Geotechnical Engineering
The construction of a new underground car park in the historic center of Brescia (Northern Italy) required the execution of a 130m long, 23m wide and 15-20m deep excavation which was supported by concrete multi-anchored diaphragm walls. The site is located between two facing ancient walls (15-16th century) that support 3-4 storey buildings in precarious conditions. The soil stratigraphy comprises a superficial layer of made ground over a clayey to sandy soil deposit supporting a perched water table. A comprehensive monitoring system was set up before construction that included inclinometers, precise leveling and automatic structural monitoring by means of a …
Calculation Of Natural Frequency Of Earth Dams By Means Of Analytical Solution,
2013
Kharazmi University, Iran
Calculation Of Natural Frequency Of Earth Dams By Means Of Analytical Solution, Maryam Mahdizadeh, Ali Ghanbari
International Conference on Case Histories in Geotechnical Engineering
Earth dams are 3-Dimensional, huge and inhomogeneous structures that interact with water and soil. They are the most common type of dams used in the world and developing countries like Iran. Seismic analysis of earth dam is very important in regions which have been subjected with earthquake impaction several times. Calculating the natural frequency of dams is the essential part for its seismic behavior analysis. So it is very important to present an appropriate solution for calculation of natural frequency. Natural frequency of earth dams is usually calculated by means of experimental correlations, shear beam analysis (base on the height …
Case Histories Of Failure Of Deep Excavation. Examination Of Where Things Went Wrong: Nicoll Highway Collapse, Singapore,
2013
AECOM, Hong Kong, China
Case Histories Of Failure Of Deep Excavation. Examination Of Where Things Went Wrong: Nicoll Highway Collapse, Singapore, John Endicott
International Conference on Case Histories in Geotechnical Engineering
During the construction of Contract C824 of the Circle Line in Singapore, on 20th April 2004 an 80 m long section of excavation, 30 m deep, totally collapsed. The resulting crater was as deep as 15 metres and was more than 100 m in diameter. Six lanes of the adjacent Nicoll Highway subsided by as much as 13 m. Four construction workers were killed. Fortunately no vehicle was involved. A Committee of Inquiry was established and held hearings from August 2004 until March 2005. The findings of the Committee were published in May 2005. These identified the causes of the …
Case Histories Of Earthen Dam Failures,
2013
BIT, India
Case Histories Of Earthen Dam Failures, R. P. Sharma, Ali Kumar
International Conference on Case Histories in Geotechnical Engineering
Historical study of dams conceived in earlier times is essential. To continue advancing, the engineering profession must periodically review past problems and the lessons that they taught. Candid sharing of information on failures as well as successes is needed. In fact, some of the most valuable learning has come from projects where errors have been clear in retrospect. In recent years, dam safety has drawn increasing attention from the public. This is because floods resulting from breaching of dams can lead to devastating disasters with tremendous loss of life and property, especially in densely populated areas. Past dam failure disasters …
Case Studies Of Dewatering And Foundation Design: Retail Warehouses In Taiwan,
2013
Hart Crowser, Inc., Seattle, WA
Case Studies Of Dewatering And Foundation Design: Retail Warehouses In Taiwan, Barry S. Chen, Roy E. Jensen
International Conference on Case Histories in Geotechnical Engineering
The case studies in this paper describe three retail warehouse sites in Taiwan that have high groundwater tables in common, but that have drastically different soil conditions. Two of the sites are in dense, permeable gravel and cobble and the third site is in interbedded alluvial sand and clay. At the first site, shallow footings and slab-on-grade floors were placed on top of a permanent passive drainage system that required accurate seepage volume estimates in the permeable gravel and cobble. At the second site, the hydraulic conductivity of the gravel and cobble is high and is sensitive to fluctuation of …
Causes And Circumstances Of Red Mud Reservoir Dam Failure In 2010 At Mal Zrt Factory Site In Ajka, Hungary,
2013
FUGRO Consult Ltd., Hungary
Causes And Circumstances Of Red Mud Reservoir Dam Failure In 2010 At Mal Zrt Factory Site In Ajka, Hungary, David Turi, Jozsef Pusztai, Istvan Nyari
International Conference on Case Histories in Geotechnical Engineering
The red mud reservoir failure in Ajka, Hungary has claimed 10 lives and cost millions of dollars in damages. Immediately after emergency measures investigations started to shed light on causes and circumstances. The authors performed an extensive desktop study of about 20 thousand pages reaching back to the 1970s, when the facility has been designed. Beside this study the dam and its area have gone through series of site investigations, from drilling to CPTu testing and laboratory testing. The information so collected resulted in the following conclusion. Contributing factors to this substantial dam failure included poor siting of the facility, …
Constructive Solutions To The Conservation Of Cultural Heritage,
2013
University of Architecture, Civil Engineering and Geodesy (UACEG), Bulgaria
Constructive Solutions To The Conservation Of Cultural Heritage, Miroslav Todorov
International Conference on Case Histories in Geotechnical Engineering
Bulgaria is a country with rich historical heritage and cultural diversity. The protection and conservation of cultural and historical monuments is vital to preserving the national identity of Bulgarians, the relationship with the land and traditional culture as an essential part of his life and means of survival. It should be noted Bulgarian modest contribution to the preservation of 7 (according to UNESCO) cultural monuments and two nature reserves listed as World Heritage. In the center of the Bulgarian capital - Sofia are located over 1400 cultural and historical monuments that highlight the civilizational and cultural outlook of the capital …
Damage On A Main Gas Pipeline Due To Landslide Of Soils Derived From Volcanic Ashes In Colombia,
2013
C.I.C. Consultores S.A., Colombia
Damage On A Main Gas Pipeline Due To Landslide Of Soils Derived From Volcanic Ashes In Colombia, Gilberto Ch. Rodriguez, Julián V. Rodriguez, Natalia A. Quintero, Jorge E. Villamarín
International Conference on Case Histories in Geotechnical Engineering
In December 2011 a great proportion slope failed affecting the main gas pipeline (20” diameter) that supplies Colombia’s southwest area. The landslide involved materials formed by soils derived from volcanic ashes and residual soils, typical in Colombia’s central zone, which acquired great energy flowing in an avalanche through the natural watercourse. The avalanche generated soil erosion over the torrent banks, generating the watercourse deepening and the deterioration of adjacent slopes over which the pipeline runs. There were identified as landslides triggering aspects the atypical raining period due to “La Niña” climatic phenomenon and the soils removal at the slope base …
Design Details To Accommodate Fault Movement In A Dam Foundation,
2013
MWH, Chicago, IL
Design Details To Accommodate Fault Movement In A Dam Foundation, Peter A. Dickson, Joseph R. Kovacich, Georgios Raptis
International Conference on Case Histories in Geotechnical Engineering
During planning for dam projects, good practice usually calls for appropriate investigations to help assure the development is not located on or immediately adjacent to active faults. There are examples of projects, however, where an active fault has been discovered in or close to a dam foundation and engineering solutions have been incorporated into design to enable satisfactory performance of the dam should fault displacement occur during project operation. In some cases, the existence of such hazards only becomes evident late in the design cycle when the dam site is considered fixed and hazard avoidance is not an easy option. …
Double Case Of Passive Pressure Acting On Wall Rotated About The Top,
2013
Institute of Theoretical and Applied Mechanics, Czech Republic
Double Case Of Passive Pressure Acting On Wall Rotated About The Top, Petr Koudelka
International Conference on Case Histories in Geotechnical Engineering
Basic research of lateral earth pressure based on physical and numerical experiments began in 1998 at the institute of the author and it has continued to the present time. The physical research should prove the behavior of ideally non-cohesive granular mass during three basic types of structure/wall movement towards in active and passive directions. The first research period in 1998-2000 was aimed on active pressure, and in 2001-2002 on the first long-term experiment with passive pressure (E3/0.2). Then new experimental equipment was developed between 2003 and 2009 on a contemporary advanced level. The first long-term experiment with passive pressure E3/0,2 …
Earth Dam Failure By Erosion, A Case History,
2013
Bechtel Power Corporation, Frederick, MD
Earth Dam Failure By Erosion, A Case History, Scott Newhouse
International Conference on Case Histories in Geotechnical Engineering
In January 1998, the Archusa Creek Dam in southeast Mississippi failed by breaching through its emergency spillway. At the time of its failure, the dam had a concrete ogee weir for a principal spillway and a vegetated earth emergency spillway. Fortunately, the dam is a low hazard structure, as there is little development downstream, and consequences of failure were mostly limited to the loss of a state-owned, recreational water park. The dam failed as a result of a 5-year storm event, triggered by intense rainfall of nearly 4.25 in. in just a few hours. Runoff generated by the storm caused …
Embankment Construction Using Column Supported Embankment,
2013
Hardesty & Hanover, LLC, West Trenton, NJ
Embankment Construction Using Column Supported Embankment, Aravinda Ramakrishna, Elizabeth Trimpin, Raymond Mankbadi
International Conference on Case Histories in Geotechnical Engineering
The construction of roadway embankments over soft, compressible soils challenges designers with managing large and differential settlements, maintaining embankment stability, and minimizing construction costs associated with long consolidation periods. These challenges can be successfully tackled with the use of an in-situ soil improvement technique such as the Column Supported Embankment (CSE). The Column Supported Embankment involves constructing a pattern of cement-grouted columns in-situ, using the vibro-displacement or displacement-auger technique. The columns are constructed to bear on dense sand strata underlying cohesive strata that would otherwise consolidate under the embankment loading. A load transfer platform (LTP) is used to effectively distribute …
Evaluation Of The Failure Probability Of Slopes In Residual Soil From The Aburrá Valley, Medellín Colombia,
2013
Universidad Nacional de Colombia, Colombia
Evaluation Of The Failure Probability Of Slopes In Residual Soil From The Aburrá Valley, Medellín Colombia, Juan Pablo Villada Rodas, Manuel Roberto Villarraga
International Conference on Case Histories in Geotechnical Engineering
In recent years the evaluation of failure probability on slope stability analyses has become important because it has been presented as a representative method helping to complement the factor of safety. As part of this paper, it is proposed the evaluation of the failure probability in cut slopes on residual soils from the Aburrá valley. Statistical analyses were performed on the most important variables, considering continuous statistical distributions. Sensitivity analyses were performed to quantify their influence in the stability. As a result, some abacuses are developed in which the height and the slope angle are related to the failure probability …
Exploration, Deconstruction, And Repair Of A Distressed Mse Retaining Wall In Saint Paul, Minnesota,
2013
American Engineering Testing, Inc., St. Paul, MN
Exploration, Deconstruction, And Repair Of A Distressed Mse Retaining Wall In Saint Paul, Minnesota, Joseph G. Bentler
International Conference on Case Histories in Geotechnical Engineering
A 225-ft long, 11-ft high MSE retaining wall was constructed in fall 2008 around the lowest corner of a parking lot at a community college. The wall provided grade separation between the higher parking lot and the green areas below. No geotechnical exploration was performed for the wall, although one had been performed for building additions elsewhere on campus, and density testing was performed periodically during MSE wall construction. The following spring, pavement had subsided up to a foot near two catch basins located several feet behind the retaining wall facing. Cracks in the pavement opened adjacent to the catch …
Failure Investigation And Restoration Of Two Cellular Sheetpile Structures,
2013
AECOM, New York, NY
Failure Investigation And Restoration Of Two Cellular Sheetpile Structures, Frank M. Clemente
International Conference on Case Histories in Geotechnical Engineering
The Trainer - Delco Tap - Mickleton 220-38 kilo-volt transmission lines are carried across the Delaware River by two 332-foot high steel latticed towers each founded on a man-made foundation island structure. Each island structure is comprised of four interconnected cellular sheetpile structures. One island, suffered a severe partial failure due to long-term scour in the Delaware River, near Chester, Pennsylvania. The other island exhibited early symptoms of potential failure, also due to scour. The client was the Philadelphia Electric Company, now known as PECO, acting on behalf of the owner, the Atlantic Electric Company (AECO). The author served as …
Failure Of Embankment On Soil-Cement Columns For Thi Vai Port, Vietnam,
2013
Thu Dau Mot University Binh Duong, Vietnam
Failure Of Embankment On Soil-Cement Columns For Thi Vai Port, Vietnam, Nguyen Minh Hai, Bengt H. Fellenius
International Conference on Case Histories in Geotechnical Engineering
The Thi Vai Container Port is constructed on reclaimed ground along the Thi Vai River in the Mekong delta approximately 90 km southeast of Ho Chi Minh City, Vietnam. The soil profile consists of an about 15 to 23 m thick deposit of soft, normally consolidated, highly compressible clay deposited on dense to compact sand. A soil improvement scheme was instigated aiming to reduce long-term settlement after construction of the facilities and improve the stability of the river bank. The scheme combined wick drains and, along the river bank, soil cement columns and toe revetments. The wick drains were installed …
Failures Of Retaining Wall Structures Due To Earthquake,
2013
University of Science and Culture, Iran
Failures Of Retaining Wall Structures Due To Earthquake, Mohammadreza Abbasi Garavand, Hamzehlou Bahareh
International Conference on Case Histories in Geotechnical Engineering
This paper describes crack pattern of reinforcement concrete retaining structure due to earthquake. For this reason, the 3-D finite element dynamic analysis of retaining wall structures with consideration of the soil-structure interaction has been used. Purpose of this study is to detect damage zone, due to earthquake in such structures. The analysis data is based on 1995 Kobe and 1994 Northridge earthquake reports, and the results have been verified with some retaining walls were damaged in those earthquakes. To take into account the non-linearity of soil-structure surface, surface to surface contact element is used. One of the most important problems …
