Reconstruction Of A Deteriorating, Tiered, Mse Wall Structure In Connecticut,
2013
Langan, Miami, FL
Reconstruction Of A Deteriorating, Tiered, Mse Wall Structure In Connecticut, Matthew E. Meyer, Christian B. Woods, Neritan Axhushi
International Conference on Case Histories in Geotechnical Engineering
At a retail development site in Southington, Connecticut, a multi-tiered Mechanically Stabilized Earth (MSE) retaining wall system was constructed in the early 1990’s to facilitate development of the site. Specifically, the retaining wall system constructed consisted of a sloped structure with three tiers of MSE wall that was approximately 56-feet tall at its highest point. The MSE walls within the slope were spaced approximately 30 to 40 feet apart horizontally, were between six and nine feet in height, and ranged in length from about 375 feet to 1,325 feet. Overall, grades on the slope ranged from about elevation 225 feet …
Finding F.O.S For Flow Type Landslide With Static Liquefaction At Karshingsa – A Case Study,
2013
CSIR-North East Institute of Science & Technology Jorhat, India
Finding F.O.S For Flow Type Landslide With Static Liquefaction At Karshingsa – A Case Study, Gokul K. Bayan
International Conference on Case Histories in Geotechnical Engineering
Karshingsa is a hilly terrain situated in lower Himalayan region under Arunachal Pradesh in India. It expresses occurrence of severe landslides of debris flow nature almost every year as and when consecutive 3-month rainfall precipitation during peak monsoon period exceeds about 2,300 mm, all along the lower Himalayan region of Eurasian plateau most particularly in Karshingsa area. Study carried out in the lower belt of Arunachal Himalaya for about more than one decade proclaims that 45%-55% landslides are flow type origin, the debris of which are flowing like liquid. Mechanism of such flow failure is static liquefaction developed in a …
Prevention Of Additional Building Settlement Due To Adjacent Construction At St. Francis Hospital And Medical Center In Hartford, Ct,
2013
Simpson Gumpertz & Heger Inc., Waltham, MA
Prevention Of Additional Building Settlement Due To Adjacent Construction At St. Francis Hospital And Medical Center In Hartford, Ct, Giuliana Giuliana, Sean D. Radley, William P. Konicki, Drew Floyd
International Conference on Case Histories in Geotechnical Engineering
During excavation for the foundation of the new John T. O’Connell North Tower at St. Francis Hospital and Medical Center (SFHMC), in Hartford, Connecticut in 2008, Building 3, an immediately-adjacent five-story brick masonry building suddenly settled up to 1.5 in. and moved laterally about 5/8-in., resulting in severe cracking of interior and exterior bearing walls and floor slabs. The excavation was immediately backfilled within 30 feet of Building 3 and all construction activities were stopped until the condition of Building 3, which provided critical laboratory, pharmacy, and administrative support functions to the hospital, was evaluated and the cause of movement …
Foundation Treatment Of Embankment Dams With Combination Of Consolidation And Compaction Groutings,
2013
Sharif University of Technology, Iran
Foundation Treatment Of Embankment Dams With Combination Of Consolidation And Compaction Groutings, Fardin Jafarzadeh, Amir Akbari Garakani
International Conference on Case Histories in Geotechnical Engineering
Treatment of soft or weak foundation in a rockfill dam is of importance due to being susceptible to the large settlements, which may cause the dam body subjected to undesirable deformations and even, catastrophic failures. In this paper the stress- strain behavior of an under construction 58 m embankment dam in North-West of Iran, namely Gerdebin dam, and its soft and weak alluvial thick foundation has been assessed numerically. The effect of combination of consolidation and compaction grouting of the basement (as a remediation method) on the dam deformations and stress levels, is investigated. For this purpose, a finite difference …
Deep Excavation On 3 Sides Of A 21 Story Building: Accounts Of A Successful Deep Excavation Project,
2013
Sharif University of Technology, Iran
Deep Excavation On 3 Sides Of A 21 Story Building: Accounts Of A Successful Deep Excavation Project, 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. TOOBA tower is located in the northern leg of the excavation boundary in a way that the northern side of the building abuts the excavation edge. Hence, this project involved excavation on 3 sides of the roughly rectangular plan of TOOBA tower to the depth of 16.5 meters below its foundation level. The necessity for constraining the deformations of the tower commended the construction …
The Influence Of Freeze-Thaw Cycles On Cbr Values Of Silty Soils Stabilized With Lime And Microsilica,
2013
Imam Khomeini International University, Iran
The Influence Of Freeze-Thaw Cycles On Cbr Values Of Silty Soils Stabilized With Lime And Microsilica, Reza Ziaie Moayed, Younes Daghigh, Behzad Pourhadi Lahiji
International Conference on Case Histories in Geotechnical Engineering
The use of byproducts of industrial materials is one the most interesting areas in geotechnical engineering in recent years. Microsilica is one of these harmful byproducts that obtained from silicon or silicon alloy metal factories. On the other hand, silty soils are not considered as suitable soils due to their low strength characteristics. In this research, the effects of lime and microsilica on stabilization of silty bed soil of a region of Karaj railway are investigated and its efficiency as a subgrade material is evaluated. To determine the best combination of the stabilizer, various contents of lime and microsilica are …
3d Fem Modelling Of A Deep Excavation Case Considering Small-Strain Stiffness Of Soil And Thermal Shrinkage Of Concrete,
2013
University Of Oxford, United Kingdom
3d Fem Modelling Of A Deep Excavation Case Considering Small-Strain Stiffness Of Soil And Thermal Shrinkage Of Concrete, Yuepeng Dong, Harvey Burd, Guy Houlsby, Zhonghua Xu
International Conference on Case Histories in Geotechnical Engineering
A typical top-down deep excavation project in Shanghai was carefully monitored during the construction process. This case history was back-analysed with a complex 3D FEM numerical model in ABAQUS to investigate the influence of different modelling procedures. The model considered the detailed construction procedures and structural information. The calculations included the small-strain stiffness of the soil and thermal shrinkage of the concrete beams and slabs. The small-strain stiffness is modelled with a multi-surface soil model developed at Oxford which has been implemented into ABAQUS. The diaphragm wall was modelled as an anisotropic linear elastic material to represent the effect of …
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 …
Geotechnical Characterization Of The Flood Plain Embankments Of The Serchio River (Tuscany, Italy),
2013
University of Pisa, Italy
Geotechnical Characterization Of The Flood Plain Embankments Of The Serchio River (Tuscany, Italy), Barbara Cosanti, Nunziante Squeglia, Diego C. F. Lo Presti
International Conference on Case Histories in Geotechnical Engineering
The flood plain embankments of the Serchio river have been constructed since the XVIII century and construction details are not known. These embankments have experienced failures several times during their life (last in December 2009). After the last event a detailed geotechnical investigation has been carried out. This paper discusses the necessary criteria for a cost – effective campaign considering the total length of the embankments (30 km) and the requested level of detail. In fact levee failure, although it is of limited extension, causes the achievement of the ultimate limit state of the entire embankment system. The campaign, in …
Bloomfield Road Stormwater Storage Tanks Grouting Works, Blackpool, Uk,
2013
United Utilities PLC, UU Engineering Haweswater House, United Kingdom
Bloomfield Road Stormwater Storage Tanks Grouting Works, Blackpool, Uk, Mark Edmondson, Pamela Rigby, David Jones, Elizabeth Gallagher, Malcolm Eddleston, David Preece
International Conference on Case Histories in Geotechnical Engineering
Bloomfield Road Stormwater Storage Tanks, owned by United Utilities PLC, were constructed in 1999 in Blackpool UK to provide 60,000m3 of storage to prevent overflow discharges during the summer bathing water season. The asset comprises two buried tanks (36m diameter and 40m deep) constructed as circular diaphragm walls. Significant groundwater inflows with minor fines content and turbidity up to 48l/s have been reported entering one of the tanks since 2001. From 2008 an increase of fines ingress has been observed indicating potential for progressive failure of the underlying formation strata. The site stratigraphy comprises predominantly glacial superficial soils overlying …
High-Risk Flood Control Dams On Difficult Soil Foundations,
2013
U.S. Army Corps of Engineers, Galveston, TX
High-Risk Flood Control Dams On Difficult Soil Foundations, Gary S. Chow, Lori K. Thomas, Willis Walker
International Conference on Case Histories in Geotechnical Engineering
Addicks and Barker Dams are two flood risk management structures owned and operated by the U.S. Army Corps of Engineers (USACE) and recently classified as extremely high risk. These dams were built in the 1940’s in west Houston, Texas, upstream of a densely populated metropolitan area. The dams consist of 11 and 13 miles of rolled earth embankments, outlet structures with five barrel conduits, and uncontrolled spillways at both ends of both dams. The original design of both dams provided for four of the five outlet conduit barrels to be ungated, permitting a combined uncontrolled discharge from both dams of …
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 …
Case Study On The Rehabilitation Of A Distressed Retaining Wall,
2013
Indian Institute of Science, India
Case Study On The Rehabilitation Of A Distressed Retaining Wall, G. L. Sivakumar Babu, Pawan Kumar, Raja Jaladurgam
International Conference on Case Histories in Geotechnical Engineering
Earth retaining structures usually need careful monitoring after construction in order to detect any signs of distress. In cases where failure is likely to occur, appropriate remedial techniques need to adopted, backed by a detailed analysis. This paper presents a case study on the rehabilitation of a retaining wall that was constructed for a bypass road project. The structure showed clear signs of distress immediately after completion and hence could not be opened for traffic. Preliminary finite element analysis of the wall showed values of factor of safety that are lesser than permissible values. The values of factor of safety …
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 …
Remediation Of Distressed Frozen Earth Cofferdams,
2013
Moretrench American Corporation, Port Washington, WI
Remediation Of Distressed Frozen Earth Cofferdams, Joseph A. Sopko, Robert Chamberland
International Conference on Case Histories in Geotechnical Engineering
Artificial Ground Freezing was used to provide temporary earth support and groundwater control for a complex system of three frozen earth cofferdams for the Milwaukee Metropolitan Sewer District’s Harbor Siphons Project in Milwaukee, Wisconsin. Site geometry and frozen earth structural design precluded construction of one large excavation, requiring the component system of the tangential cofferdams. High groundwater velocity prevented the formation of the frozen earth walls during various stages of the project. Remedial methods including external dewatering, permeation grouting, jet grouting, timber shoring and sheet piling were attempted to complete the project. Ultimately a more aggressive ground freezing program was …
Some Remarks On The Influence Of Deep Excavations On Neighbouring Buildings,
2013
Technical University of Civil Engineering Bucharest
Some Remarks On The Influence Of Deep Excavations On Neighbouring Buildings, Cătălin Căpraru, Anton Chirică
International Conference on Case Histories in Geotechnical Engineering
Increasing density of urban areas leads to building high-rise buildings with deep foundations, enabling their basements for car parking and facilities. Increasing depth of the foundation of these buildings increases also the need for more rigid earth retaining systems. Thus, generally, due to the importance of the neighboring buildings, great care has to be taken in the design process of the retaining structure and the support system of deep excavation in densely built urban areas. The paper summarizes a parametric study on a geotechnical model of a deep excavation, proper to Bucharest subsoil, Romania. The analysis of the excavation was …
Koman Concrete Face Rockfill Dam Updating The Static And Seismic Evaluations,
2013
Purdue University, West Lafayette, IN
Koman Concrete Face Rockfill Dam Updating The Static And Seismic Evaluations, Hamid Fallah, Martin Wieland
International Conference on Case Histories in Geotechnical Engineering
The static and seismic safety evaluation of the 115 m high Koman concrete face rockfill dam, located at the Drin river in Albania has been checked according to the current state-of-practice for the seismic safety evaluation of large embankment dams. For the dynamic analyses with the equivalent linear method a two-dimensional model of the highest dam section was used. The static analysis was carried out by a Mohr-Coulomb elasto-plastic material model of the rockfill. The safety of the dam was checked for the safety evaluation earthquake (SEE) with a peak ground acceleration of the horizontal component of 0.45 g. Spectrum-compatible …
A Case Study On The Use Of Flexible Earth Retaining Structure In Instable Slopes,
2013
Zetas Zemin Teknolojisi A.S., Turkey
A Case Study On The Use Of Flexible Earth Retaining Structure In Instable Slopes, H. Turan Durgunoglu, Ahmet Sahin, Onder Akcakal
International Conference on Case Histories in Geotechnical Engineering
Recently new highway, motorway and railway projects take place in many developing countries within the aggressive infrastructure investment programme of governments. In rugged topography, engineers face the challenging problems of designing safe and cost effective cuts and fills for these projects especially under seismic loading and marginal stability conditions. Overall stability mechanism and safety of the cut generally controls the design decisions for the relevant section. In addition, because of the construction width limitations, in some mechanically stabilized earth wall projects sufficient width to accommodate the strip lengths of the retaining system cannot be provided. To eliminate all these problems, …
Embankment Slope Stability Analysis Of Dwight Mission Mine Site Reclamation Project,
2013
Southern Illinois University Carbondale, Carbondale, IL
Embankment Slope Stability Analysis Of Dwight Mission Mine Site Reclamation Project, Christopher D. Kiser, Prabir K. Kolay
International Conference on Case Histories in Geotechnical Engineering
The paper presents a slope stability analysis of a proposed embankment contained within an abandoned coal mine reclamation project near Sallisaw, Oklahoma. The project involved the use of computer modeling to analyze the slope stability of the earth-filled embankment. The project plans call for mine spoils and silty-clay borrow materials is used to construct a 74,000 cubic yard embankment, which will be used as a water impoundment for a small lake. The embankment, as designed, consists of a central clay core, mine spoils and a silty-clay material cap. The software program Galena was used as a modeling tool for the …
