Soil Reinforcement By Rigid Inclusions: Contamination Of An Oil Storage Tank,
2013
SIMPRO Geotechnical Consulting Bureau, Tunisia
Soil Reinforcement By Rigid Inclusions: Contamination Of An Oil Storage Tank, Mounir Bouassida, Wafy Bouassida
International Conference on Case Histories in Geotechnical Engineering
An oil storage tank at the North suburb La Goulette (Tunisia) was founded on reinforced soft soil by floating sand columns of 6 m in length and 11% of improvement area ratio within a thick compressible clayey soil. Serious contamination of tank due to very significant differential settlement forces the decision to terminate its operations. Reinforcement by inclined rigid inclusions was suggested to neutralize the evolution of consolidation settlement in sub compressible clay layers. Numerical predictions were implemented for the study of the post behavior of tank on reinforced soil by rigid inclusions. Effectiveness of solution using inclined rigid inclusions …
A Case History Of A Deep Foundation Pit Constructed By Zoned Excavation Method In Shanghai Soft Deposit,
2013
East China Architectural Design & Research Institute, Co., Ltd., China
A Case History Of A Deep Foundation Pit Constructed By Zoned Excavation Method In Shanghai Soft Deposit, Z. H. Xu, J. Zhang, C. Chen
International Conference on Case Histories in Geotechnical Engineering
This paper presents a case history of a deep excavation for building foundation in Shanghai soft deposit. The excavated area was about 15916 m2. The excavation depth at the tower part was 15.0 m and at the podium part was 14.5 m to 15.2 m. Around the excavated pit, there existed many facilities including roads, the shield tunnels of the No.7 Metro, buildings, and pipelines. Zoned excavation method was adopted in this project. The excavation was divided into a relatively small pit (Zone I) and a big pit (Zone II). The small pit was just adjacent to the …
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 …
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 …
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 …
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 …
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 …
Lessons From Revisiting Three Cases Of Slope Failure,
2013
National Technical University of Athens, Greece
Lessons From Revisiting Three Cases Of Slope Failure, Konstantina Papadopoulou, George Gazetas
International Conference on Case Histories in Geotechnical Engineering
Three old failures of geotechnical projects are analyzed, where some original design uncertainties were lately discovered. The first case concerns the failure during construction of a slope at the portal area of a tunnel in Greece, due to unexpected excessive water pressures. The failure was restricted to the upper weathered zone of flysh formation. Due to difficulties in performing laboratory tests with such hard soil material necessitated the estimation of shear strength parameters on the basis of the rockmass classification systems. The next case deals with an extensive failure of an open pit mine slope in Greece. The ground consists …
Numerical Analyses Of Soil Deformations Around Deep Excavations,
2013
Sevencan Architecture Engineering, Turkey
Numerical Analyses Of Soil Deformations Around Deep Excavations, Oktay Sevencan, Kutay Ozaydin, Havvanur Kilic
International Conference on Case Histories in Geotechnical Engineering
In this study, the deep excavation of Cincin Station located along the Bağcılar - Otogar metro line which is currently under construction in Istanbul is modeled numerically. The excavation (depth 32.5 m) of the station is carried out with a surrounding slurry trench diaphragm wall and top-down construction method. The six slabs of the station building and the foundation mat are used as support elements. Lateral soil displacements are measured with inclinometers placed in the wall and nearby soil layers. The results of numerical analysis using soil profile and geotechnical parameters obtained from conventional field and laboratory tests and measured …
Review Of The Seismic Retrofitting Of Sardis Dam,
2013
University of Illinois at Urbana Champaign, Urbana, IL
Review Of The Seismic Retrofitting Of Sardis Dam, Randa Asmar, Abdul Qudoos Khan
International Conference on Case Histories in Geotechnical Engineering
Most of the dams in Central United States, built in earlier part of 20th century are hydraulic fill dams. At the time of construction of these dams, earthquake engineering was still in its infancy and hence the dams lacked proper seismic design. Failure or near failure of earth dams as a consequence of earthquakes forced the United States Army Corps of Engineers (USACE) to re-evaluate the seismic performance of major earth dams in the Central United States, one of these dams was Sardis Dam. Investigations of Sardis Dam revealed a potentially liquefiable silty clay layer under the upstream shell. It …
Stabilization Of A Failed Highway Slope: A Multi-Phased Approach,
2013
Applied Geotechnical Services, Inc., Livonia, MI
Stabilization Of A Failed Highway Slope: A Multi-Phased Approach, Jeffrey T. Anagnostou, Anthony S. Nestor, Purushottam Deo, Heidi Flateau
International Conference on Case Histories in Geotechnical Engineering
A county road department in Southeastern Michigan was faced with the problem of stabilizing a slope along the Clinton River supporting a heavily trafficked roadway. The roadway and supporting slope had performed satisfactorily for over 50 years. However, a reinforced concrete seawall that had partially supported the slope deteriorated over time, contributing to progressive failure of the slope and resulting damage to the roadway. The site is situated within the glacial lake plain district of Southeastern Michigan. The site geology consists of approximately 7 feet of over-consolidated clays underlain by approximately 17 feet of normally consolidated glacial-lacustrine clays. Below the …
Underpinning A Residential Structure On Uncontrolled Fill With Helical Screw-Piles,
2013
University of Massachusetts, Amherst, MA
Underpinning A Residential Structure On Uncontrolled Fill With Helical Screw-Piles, Alan J. Lutenegger
International Conference on Case Histories in Geotechnical Engineering
Underpinning of a private residence using square-shaft helical Screw-Piles is described. A two story wood frame single-family residence constructed in 1996 in a small subdivision started to experience differential settlement not long after construction. The settlement continued for several years, leading to excessive cracking in the basement walls and floor, severe misalignment of doors and windows and cracking of interior walls. It was discovered that the area of the housing development had previously been used as a commercial sand and gravel pit which had subsequently been used as a local dumping area for miscellaneous refuse and which had then been …
Failures And Remediation Of Rock Slope Stability Problems And Remediation At Earthquakes At Part Of Werka Descent Road West Of Saudi Arabia,
2013
King Abdulaziz University, Saudi Arabia
Failures And Remediation Of Rock Slope Stability Problems And Remediation At Earthquakes At Part Of Werka Descent Road West Of Saudi Arabia, Bahaaeldin Sadagah
International Conference on Case Histories in Geotechnical Engineering
Werka descent road lies at western region of Saudi Arabia. It is constructed two years ago harmed due to rainstorm and absence of remedial measures. Werka mountainous road subjected to failures of man-made rock slope faces, and debris flow along both sides of 8-m width road. Intensive geotechnical study includes the RMR and GSI rock masses classifications were applied indicates that the rocks are medium to poor quality. The integrated techniques such as graphical method, modeling, and simulation were utilized to assess rock slope failures and rockfalls by using DIPS, RocFall, RocPlane and Swedge programs, and recommend the remedial measures …
Backward Erosion Piping Model Verification Using Cases In China And The Netherlands,
2013
Deltares / Delft University of Technology, The Netherlands
Backward Erosion Piping Model Verification Using Cases In China And The Netherlands, V. M. Van Beek, Q. L. Yao, M. A. Van
International Conference on Case Histories in Geotechnical Engineering
Backward erosion piping, the process of shallow pipe development in the sandy foundation of levees, is a threat to the safety of levees in countries like China and the Netherlands. Several models are available to predict the required critical head for this phenomenon, i.e. Bligh’s model and Sellmeijer’s model. Well-documented breach cases, which unfortunately are rare, give the opportunity to verify the applicability of prediction models. In this paper two piping cases in China and one piping case in the Netherlands have been described and analyzed in order to compare the outcome of prediction models with this actual data. It …
Investigation Of The Effect Of Modeling Of Control Tunnel In Retaining Structure Of J2 Station Of Mashhad Metro Using Plaxis 2d,
2013
Tafresh University, Iran
Investigation Of The Effect Of Modeling Of Control Tunnel In Retaining Structure Of J2 Station Of Mashhad Metro Using Plaxis 2d, S. M. Mousavi, F. Rouzmehr, A. H. Fazli
International Conference on Case Histories in Geotechnical Engineering
Nowadays using of underground concrete arch excavation method is very common for execution of retaining structures (soldier structure) of deep and semi deep metro stations all around the world. In this method executer can use retaining structure as a part of main structure of station in next construction steps with using of piles of retaining structure as a part of main structure's wall. One of the first steps in building retaining structure of metro station is control tunnel (patrol tunnel) that usually is a prefabricated controlling tunnel in the middle of retaining structure. This tunnel is used for digging bores …
Stability Analysis Of Behesht-Abad Water Conveyance Tunnel Inlet Portal Using Experimental, Limit Equilibrium And Numerical Methods,
2013
Dolatabad Azad University, Iran
Stability Analysis Of Behesht-Abad Water Conveyance Tunnel Inlet Portal Using Experimental, Limit Equilibrium And Numerical Methods, Arash Mohammadi, Mahmoud Hashemi, Hooman Sharifpour
International Conference on Case Histories in Geotechnical Engineering
The Behesht-abad Water Conveyance Tunnel is one of the most important tunnels conveying water to central Iran plain having 60 km length and 6 m diameter. The tunnel portal intersects with important faults of the region which is nearby Ardal city. Therefore, the rock mass surrounding the tunnel portal faces instability problem. Initially, the joints characteristics of the rock mass surrounding the inlet portal were evaluated to find the dominant joint sets along with the characteristics required for stability analyses inputs. Also the deformation modulus and other engineering properties of the rock mass were assessed using the available drilled boreholes …
Landslide Stabilization Along The Ohio River Using Cantilevered Stub Piers,
2013
Terracon Consultants, Inc., Cincinnati, OH
Landslide Stabilization Along The Ohio River Using Cantilevered Stub Piers, Swaminathan Srinivasan, Jess A. Schroeder
International Conference on Case Histories in Geotechnical Engineering
Landslide activity along U.S. 50 in Cincinnati, Ohio has caused roadway damage for decades. After a necessary closure of 3 lanes due to slope movements, emergency stabilization measures were undertaken to protect the roadway by providing a “pseudo” short-term solution (target 3 to 5 years) necessitated by ODOT budget constraints. The landslide shear plane was near the top of a sloping bedrock surface as much as 50 feet below grade. “Stub Piers” were installed 40 feet downslope of the roadway shoulder. The shafts were heavily reinforced across the deep shear plane but steel reinforcing did not extend the full length …
M-222 Slope Stabilization Case History – Geotechnical Lessons Learned From Michigan Department Of Transportation Design Build Project,
2013
Soil and Materials Engineers, Inc., Lansing, MI
M-222 Slope Stabilization Case History – Geotechnical Lessons Learned From Michigan Department Of Transportation Design Build Project, Michael J. Thelen, Daniel A. Thome
International Conference on Case Histories in Geotechnical Engineering
In 2009, the Michigan Department of Transportation (MDOT) became concerned about ongoing slope movements adjacent to a segment of M-222 located on outside bend of the Kalamazoo River in the City of Allegan, Michigan. Over the next couple years, continued river erosion and seasonally wet springs caused 8- to 10-foot high scarps adjacent to M-222, condemnation of a home, and several large block slides into the river. In the early spring of 2011, MDOT secured their first Construction Manager/General Contractor (CMGC) delivery method contract to protect M-222 and repair the slope. Improvements included constructing an up to 26-foot tall retaining …
