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Full-Text Articles in Engineering

An Example Of Teaching Slope Stability From True Case Histories, Diego Lo Presti Apr 2013

An Example Of Teaching Slope Stability From True Case Histories, Diego Lo Presti

International Conference on Case Histories in Geotechnical Engineering

The use of case histories in classroom mainly involves an inductive teaching approach. This paper discusses the intrinsic advantages and possible drawbacks of such an inductive approach. More specifically, the paper illustrates an example of teaching the class of “slope stability” based on such methodology. The class takes place at the University of Pisa in the second tier degree of Civil Engineering of Infrastructures. The inductive teaching approach is very popular in the British/American Higher Education system. On the contrary it is not so popular in Latin countries like Italy. In order to make more clear the comprehension of this …

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Application Of Observational Method In The Successful Construction Of Underground Structures, Sardar Sarovar (Narmada) Project, Gujarat, India, Indra Prakash Apr 2013

Application Of Observational Method In The Successful Construction Of Underground Structures, Sardar Sarovar (Narmada) Project, Gujarat, India, Indra Prakash

International Conference on Case Histories in Geotechnical Engineering

The Sardar Sarovar (Narmada) underground powerhouse is located in Deccan Basalt flows in the lower Narmada valley in Gujarat state. These flows are intruded by dolerite dykes and sill. Basalt flows and dolerite rocks are considered good tunneling media for locating underground structures. Therefore, initial designing of supports was done considering good rock mass conditions. However, during construction numerous geotechnical problems were encountered necessitating review of support system. Rock falls and collapses were observed in tunnel sections passing through dolerite dykes and sills. Cracks were observed in the walls of the powerhouse cavern. During progressive excavations back analysis was done …

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Behaviour Of A Large Anchored Basement In Dense Sands And Gravels, Francesco Petrella, Roberto Persio, Silvia Ferrero, Tim Hocombe Apr 2013

Behaviour Of A Large Anchored Basement In Dense Sands And Gravels, Francesco Petrella, Roberto Persio, Silvia Ferrero, Tim Hocombe

International Conference on Case Histories in Geotechnical Engineering

Prior to the excavation of half a million cubic meters of dense gravelly material within the city centre of Milan, a 24 to 27m long diaphragm wall was built to provide a 17m retained height to a four-level basement. Temporary support was offered by two to four rows of ground anchors with the exception of a portion adjacent to an existing multi-level cark park where a post-tensioned capping beam was installed to protect the car park and prevent it from being subject to sway. Other design challenges were posed by the proximity of a buried channel and of an urban …

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Calibration Of Numerical Model For Liquefaction-Induced Effects On Levees And Embankments, Michelle Shriro, Jonathan D. Bray Apr 2013

Calibration Of Numerical Model For Liquefaction-Induced Effects On Levees And Embankments, Michelle Shriro, Jonathan D. Bray

International Conference on Case Histories in Geotechnical Engineering

Soil liquefaction presents a significant hazard to the built environment. The seismically induced permanent displacement of earth levees, dams, and embankments resulting from liquefaction below these earth structures is not well captured in current seismic design practice. The objective of this study is to advance the capabilities of numerical methods toward the solution of problems involving limited lateral spreads. The nonlinear soil constitutive model UBCSAND, as implemented in the finite difference program FLAC, (Itasca), is used to evaluate the seismic deformations of the newly-constructed Moss Landing Marine Laboratory (MLML) in Moss Landing, California resulting from liquefaction-induced lateral movements during the …

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Case Histories In Geotechnical Engineering Education, James Mahar Apr 2013

Case Histories In Geotechnical Engineering Education, James Mahar

International Conference on Case Histories in Geotechnical Engineering

Case histories can be taught as an individual course or as part of a specific engineering class. These studies are very important when the teaching methodology incorporates the observational approach in design and construction. Several resources for case histories are available. However the most insightful are those in which the instructor has personal knowledge or the student participates in a case history-type project. One of the most important elements in engineering education is the sequential design approach in civil works projects. Case histories provide a very effective means of illustrating the complete design process which is the framework of professional …

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Case History — Performance Monitoring Success, Charles B. Grant, Tom Hurley Apr 2013

Case History — Performance Monitoring Success, Charles B. Grant, Tom Hurley

International Conference on Case Histories in Geotechnical Engineering

The City Creek Center urban redevelopment project in Salt Lake City, Utah involved excavations up to 65 feet deep. Shoring systems included more than 29,000 square feet of anchored diaphragm walls, 100,000 square feet of soil nail walls, and 860 linear feet of underpinning. Detailed performance monitoring alerted the project team to unacceptable performance of an anchored diaphragm wall adjacent to an occupied twenty-five-story building on shallow foundations. This knowledge allowed the team to react quickly, stabilize the excavation, investigate the situation, and develop successful remedial measures. The diaphragm wall was reinforced with additional anchors and subgrade concrete struts, allowing …

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Case Studies Used In Instruction To Achieve Specific Learning Outcomes: The Case Of The Embankments Constructed For The Approach To Limerick Tunnel, Ireland, Trevor L. L. Orr, Marina Pantazidou Apr 2013

Case Studies Used In Instruction To Achieve Specific Learning Outcomes: The Case Of The Embankments Constructed For The Approach To Limerick Tunnel, Ireland, Trevor L. L. Orr, Marina Pantazidou

International Conference on Case Histories in Geotechnical Engineering

This paper gives an example of a case study written for instructional purposes, in order to support the achievement of specific learning outcomes which include (i) identifying modes of failure and (ii) selecting appropriate soil parameter types and values. Case writing was based primarily on information from a detailed publicly available article, supplemented with additional input from one author of this article. The case narrative is accompanied by annotated calculations, which follow the general design philosophy of the project. The case focuses on two of the main issues for the geotechnical design of the highway embankments close to the Limerick …

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Composite Shallow & Deep Foundation In Karst Geology For The Countryside Christian Center New Sanctuary Clearwater, Florida, Said Iravani Apr 2013

Composite Shallow & Deep Foundation In Karst Geology For The Countryside Christian Center New Sanctuary Clearwater, Florida, Said Iravani

International Conference on Case Histories in Geotechnical Engineering

Evaluation, design, construction, and monitoring of foundations in karst geology are challenging tasks. The random presence of karst features, the variation in size, extent, and depth of karst features, and the different origin and geological characteristics of karst features make site characterization and investigation difficult. A balance between non-intrusive filed tests is useful to improve the site characterization. Non-intrusive field tests which provide multi-dimensional mapping such as Electrical Resistivity Imaging (ERI) or Ground Penetrating Radar (GPR) can provide spatial coverage instead of point data. Non-intrusive field tests which are not sensitive to moisture such as shear wave velocity measurements can …

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Enhancement Of Engineering Education In The Arab Gulf States Through Cooperative Learning Protocols, Waddah Akili Apr 2013

Enhancement Of Engineering Education In The Arab Gulf States Through Cooperative Learning Protocols, Waddah Akili

International Conference on Case Histories in Geotechnical Engineering

Engineering education in the Arab Gulf States (the Region) faces significant challenges as it seeks to meet the demands on the engineering profession in the twenty first century. This paper focuses on classroom-based pedagogies of engagement, and cooperative learning strategies in particular. The paper is a follow up to previous work by the author, on viable strategies to improve the classroom environment of engineering colleges in the Region. At the start, the paper provides an overview of relevant benchmarks of engineering education in the Region. Then, relates author’s preliminary findings on teaching/learning practices in Region’s colleges, sheds light on the …

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Foundation Design And Settlement Measurement Of Cctv New Headquarter, Wang Wei-Dong, Wu Jiang-Bin, Weng Qi-Ping Apr 2013

Foundation Design And Settlement Measurement Of Cctv New Headquarter, Wang Wei-Dong, Wu Jiang-Bin, Weng Qi-Ping

International Conference on Case Histories in Geotechnical Engineering

The China Central Television (CCTV) New Headquarter is situated in Chaoyang District of Beijing. It consists of two main towers and podiums. The bored piles with diameter of 1200mm and single pile bearing capacity of 11000kN were chosen for the towers. Through the combination of pile-end and shaft grouting, as well as in-situ bearing capacity tests of piles with different pile length, the pile length, the costs and construction difficulties were reduced considerably. Based on the concept of interactions among the superstructure, the foundation raft, the piles and soils, calculations and analysis were carried out on the design of the …

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Geosynthetic Reinforced Segmental Retaining Wall Failure: Forensic Investigation And Remediation, Rajaram Janardhanam, Migue A. Pando Apr 2013

Geosynthetic Reinforced Segmental Retaining Wall Failure: Forensic Investigation And Remediation, Rajaram Janardhanam, Migue A. Pando

International Conference on Case Histories in Geotechnical Engineering

At UNC Charlotte, the authors have used a retaining wall failure case history to cover the different modes of failure of retaining wall and to highlight the importance of global stability failure. Specifically, this case study has been used by the authors in undergraduate and graduate courses of geotechnical engineering to highlight the importance to include in the design process the assessment of global stability. The project is valuable to students due to wealth of data including field and laboratory site investigation, monitoring data from slope inclinometers, amongst other data. The students are presented with the initial design information including …

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Geotechnical Failures Caused By Human Errors, Marek Tarnawski Apr 2013

Geotechnical Failures Caused By Human Errors, Marek Tarnawski

International Conference on Case Histories in Geotechnical Engineering

The West Pomeranian Technical University holds conferences on building failures. It usually takes place every other year and it is well known and respected in Poland. The jubilee, 25th conference took place in 2011. With intent to honor it the author prepared a monograph entitled “Geotechnical reasons of building failures”. It was based, almost solely, on the contents of 225 case studies presented in the former conference proceedings. As with every conference based so much on case histories it presents in its papers a mosaic of various cases. Although each describes and explains the reality in its own way, systematic …

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Geotechnical Investigation At Barrage For Foundation Design At Nyamjang Chhu Hydro Power Project, Tawang, Arunachal Pradesh, India — A Case Study, Ram Bachan Shivali, Rakesh Mahajan Apr 2013

Geotechnical Investigation At Barrage For Foundation Design At Nyamjang Chhu Hydro Power Project, Tawang, Arunachal Pradesh, India — A Case Study, Ram Bachan Shivali, Rakesh Mahajan

International Conference on Case Histories in Geotechnical Engineering

The Nyamjang Chhu Hydro Electric Project (780 MW) located in District Tawang, Arunachal Pradesh, India, proposes construction of a barrage across Nyamjang Chhu River for diversion of water for power generation. The diversion barrage comprises of gated spillway and sluiceway, head regulator, surface desanders and a collection pool cum tunnel intake. Geotechnical investigations for assessment of subsoil strata at barrage location and its evaluation for foundation design included drilling of 13 no boreholes totaling 551m. In-Situ permeability and standard penetration tests (SPT) were conducted in the boreholes along with Dynamic Core Penetration Test (DCPT) conducted adjacent to boreholes. Disturbed and …

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Importance Of Observational Method In View Of Numerical Analyses For Retaning Structures In Soft Soils, Patrick Becker Apr 2013

Importance Of Observational Method In View Of Numerical Analyses For Retaning Structures In Soft Soils, Patrick Becker

International Conference on Case Histories in Geotechnical Engineering

The soil-structure-interaction of retaining structures is complex and dependent on many factors. In particular excavations in soft soils and urban environments with adjacent buildings are always subjected to deformations which are not fully avoidable. Therefore, numerical analyses can be a powerful tool for predicting the stress path and time dependent deformation behavior of retaining structures in soft soils. But the quality of these numerical predictions is directly related to the used constitutive soil models, the estimation of their material parameters and a realistic simulation of the soil-structure-interaction. The fact that Class-A predictions of the deformation behavior of retaining structures in …

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Insurance Industry Perspective On The Importance Of Geotechnical Earthquake Engineering For Commercial Structures, James Saldaña Apr 2013

Insurance Industry Perspective On The Importance Of Geotechnical Earthquake Engineering For Commercial Structures, James Saldaña

International Conference on Case Histories in Geotechnical Engineering

Pricing in the commercial catastrophe insurance market is primarily driven by computer models. For the evaluation of commercial earthquake insurance risk, the majority of insurers, reinsurers and more recently, rating agencies, rely heavily on the output models developed by a few software vendors. Insurers and reinsurers evaluate their total risk based on output from one or more of these models, and develop prices that depend on the loss estimate data from the models. In an effort to most accurately potential, soil conditions and engineering practices are recognized by the model vendors and incorporated into the loss calculation algorithms.When an insurer …

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Liquefaction Resistance Of Gravelly Soils, Michael R. Lewis, Ignacio Arango, Kenneth H. Stokoe Ii Apr 2013

Liquefaction Resistance Of Gravelly Soils, Michael R. Lewis, Ignacio Arango, Kenneth H. Stokoe Ii

International Conference on Case Histories in Geotechnical Engineering

Liquefaction assessments of gravels and soils that contain a large gravel fraction are difficult. Undisturbed (intact) sampling of these soils is problematic and laboratory testing carried out on reconstituted samples or on frozen samples obtained from the field is time consuming, expensive, and interpretation of the results requires considerable judgment. Because of these and other issues, for a remote site in British Columbia, Canada (aka “Study Site”), it was decided to carry out the liquefaction potential assessment using existing published relationships and case history data on similar soils. This case history describes the approach utilized, including material mechanical properties, measured …

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Networked Geotechnical Near Real-Time Monitoring For Large Urban Excavation Using Multiple Wireless Sensors, Stephen M. Mclandrich, Youssef M. A. Hashash, Nick J. O’Riordan Apr 2013

Networked Geotechnical Near Real-Time Monitoring For Large Urban Excavation Using Multiple Wireless Sensors, Stephen M. Mclandrich, Youssef M. A. Hashash, Nick J. O’Riordan

International Conference on Case Histories in Geotechnical Engineering

A massive urban excavation is required to construct the below-grade rail platforms for the Transbay Transit Center. A performance-based approach was used to design the minimum stiffness of the shoring system to limit excavation-induced ground movements to appropriate magnitudes and minimize impact to adjacent infrastructure. During construction, a fully-automated near real-time digital geotechnical monitoring system that integrates wireless sensor data streams into an integrated database and decision support system called the Global Analyzer is used to track the performance of this excavation. Instrumentation used for monitoring includes inclinometers, deep settlement markers, extensometers, piezometers, and an automated total station network. Some …

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Numerical Modeling And Use Of Settlement Reducing Auger Cast-In-Place Piles Below A Mat Foundation, Swaminathan Srinivasan, Aaron J. Muck Apr 2013

Numerical Modeling And Use Of Settlement Reducing Auger Cast-In-Place Piles Below A Mat Foundation, Swaminathan Srinivasan, Aaron J. Muck

International Conference on Case Histories in Geotechnical Engineering

The 45-story Great American Tower, the tallest building in Cincinnati, is not only changing the downtown skyline, but is an excellent case study of innovation in geotechnical engineering. This project is an excellent example of the use of technological advances in site characterization and soil-structure methods. When an opportunity arises to combine state-of-the-art concepts with advanced modeling tools, engineers need to combine knowledge and forward thinking to geotechnical solutions to promote the state-of-practice. The Great American Tower at Queen City Square in Cincinnati, Ohio combines a mat foundation with a limited number of auger cast-inplace (ACIP) piles, with the piles …

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Performance Of Digboi Refinery Modernization Project From Geotechnical Aspects — Investigation And Observations, Gokul K. Bayan Apr 2013

Performance Of Digboi Refinery Modernization Project From Geotechnical Aspects — Investigation And Observations, Gokul K. Bayan

International Conference on Case Histories in Geotechnical Engineering

Digboi Refinery is the world’s oldest refinery in simple form which is producing oil since 1889 till present with its modernized setup. Its first well was dug manually during 1889 and crude oil was found at 54m depth only. This phenomenon has encouraged establishing an industry on oil producing business, and accordingly a form of first refinery was comeout in 1889. The Digboi Refinery modernization project was taken up in large scale in order to overcome the technological obsolescence of the old refinery. Subsequently a number of other major projects were undertaken by Assam Oil Division to further revamp and …

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Role Of Case Histories On Geotechnical Engineering Teaching And Practice, R. Shivashankar Apr 2013

Role Of Case Histories On Geotechnical Engineering Teaching And Practice, R. Shivashankar

International Conference on Case Histories in Geotechnical Engineering

Geotechnical engineering teaching can be made more interesting with the use of modern methods of teaching and learning aids, visits to construction projects, case studies etc. A faculty at an university/technical institute, who is actively involved in geotechnical designs and consultancy works, will have enough case studies, with the examples of which he, will be able to deliver his lectures more effectively and make a good impression upon the students. The universal mantra nowadays is ‘learning should be made more student centric’. At the author's institute, where a post-graduate and doctoral programme in geotechnical engineering are being successfully run for …

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Site Effects Estimation In Tehran City By Using Empirical Methods, Reza Behrou, Mohammad Reza Ghayamghamian Apr 2013

Site Effects Estimation In Tehran City By Using Empirical Methods, Reza Behrou, Mohammad Reza Ghayamghamian

International Conference on Case Histories in Geotechnical Engineering

In this paper, site effects assessment in Tehran city, the capital of Iran, were estimated by using empirical methods. Both spectral ratio of the horizontal components of sedimentary site to rocky site (Hs/Hr) or site/reference, and Horizontal to Vertical Spectral Ratio (HVSR) methods have been used for estimation the site effects parameters. For this purpose, the recorded motions in BHRC (Building and Housing Research Center) acceleration stations were analyzed. These motions were recorded from Changureh-Avaj (2002), Tehran (2003), Firozabad-Kojour (2004) and Kahak-Qom (2007) earthquakes, which have been occurred near to the Tehran city. Some of these motions recorded in rocky …

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Site Response Analysis In The Stm-M6 Industrial Area Of The City Of Catania (Italy), Antonio Cavallaro, Antonio Ferraro, Salvatore Grasso, Michele Maugeri Apr 2013

Site Response Analysis In The Stm-M6 Industrial Area Of The City Of Catania (Italy), Antonio Cavallaro, Antonio Ferraro, Salvatore Grasso, Michele Maugeri

International Conference on Case Histories in Geotechnical Engineering

The paper presents the case history of the geotechnical characterization of a seismic site for the re-use of an industrial building for producing solar panels in the industrial area of Catania (Sicily, Italy). To determine the geological profile and the geotechnical characteristics of the soil, the site was well investigated by means of in situ and laboratory tests. The following in situ geotechnical tests were carried out: Borings, SPT, CPT, PLT and dynamic in situ tests. Among them Down-Hole (D-H), Cross-Hole (C-H), SASW and recently Seismic Dilatometer Marchetti Tests (SDMT) have been carried out, with the aim to evaluate the …

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Students As Forensic Engineers: An Innovative Approach To Teaching Soil Mechanics, Benoît Courcelles, Lina Forest, Anastassis Kozanitis Apr 2013

Students As Forensic Engineers: An Innovative Approach To Teaching Soil Mechanics, Benoît Courcelles, Lina Forest, Anastassis Kozanitis

International Conference on Case Histories in Geotechnical Engineering

Civil engineers are everyday faced with multidisciplinary problems. Their tasks are not only related to technical aspects, but also involve ethical and environmental issues, economic considerations and, nowadays, international collaborations. This broad spectrum of aspects requires a strong technical knowledge, as well as many interpersonal skills and an interest in societal related issues. When traditional courses are simply adapted to the development of technical competences, introducing students to non-technical (although civil engineering-related) aspects remains a challenge. To remediate to this difficulty, an innovative approach was implemented in the undergraduate course of Soil Mechanics at Polytechnique Montreal. The originality of our …

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Supporting Tunnelling Excavation Of An Unstable Slope By Long Term Displacement Monitoring, Francesca Bozzano, Paolo Mazzanti, Alberto Prestininzi Apr 2013

Supporting Tunnelling Excavation Of An Unstable Slope By Long Term Displacement Monitoring, Francesca Bozzano, Paolo Mazzanti, Alberto Prestininzi

International Conference on Case Histories in Geotechnical Engineering

A complex multi-sensor monitoring platform for the continuous control of an unstable slope affected by tunneling excavation, was realized between 2007 and 2008 after the first collapse of an already built tunnel entrance. The monitoring system was made of some inclinometric and piezometric sensors up to 70 m deep, a topographic system, a Terrestrial SAR Interferometer, a weather station, a photocamera and some load cells installed on bulkheads anchors. The continuous monitoring of the slope during different working phases (planning of stabilization works, realization of stabilizations works and tunneling excavation) allowed us to continuously control the slope behaviour, thus guaranteeing …

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The Initiative Of The Hellenic Society For Soil Mechanics And Geotechnical Engineering To Support The Development Of Case Studies Suitable For Instruction & A Slope Stability Example, George Belokas, George Dounias, Marina Pantazidou, Christos Tsatsanifos Apr 2013

The Initiative Of The Hellenic Society For Soil Mechanics And Geotechnical Engineering To Support The Development Of Case Studies Suitable For Instruction & A Slope Stability Example, George Belokas, George Dounias, Marina Pantazidou, Christos Tsatsanifos

International Conference on Case Histories in Geotechnical Engineering

The ultimate goal of this article is to promote the collection of case studies suitable for geotechnical instruction by (a) proposing a way of supporting development of such cases through incentives and (b) providing an example of a suitable case study and the necessary accompanying material. The support structure proposed is the initiative of the Hellenic Society for Soil Mechanics and Geotechnical Engineering (HSSMGE) to establish a competition for case studies appropriate for geotechnical instruction and award a prize at its Geotechnical Conference. The paper includes the evaluation criteria and case study specifications of the competition, which highlight the characteristics …

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Use Of The Observational Method To Verify Design Of Earth Retention Structures, Timothy H. Bedenis, Christopher G. Naida Apr 2013

Use Of The Observational Method To Verify Design Of Earth Retention Structures, Timothy H. Bedenis, Christopher G. Naida

International Conference on Case Histories in Geotechnical Engineering

Two case histories are presented for earth retention structures where the results of construction monitoring were used to verify key criteria used for the design of the structures. One case history consists of a sheet-pile bulkhead structure for the unloading of bulk aggregate products in Bay City, Michigan. The front wall of the sheet-pile bulkhead was analyzed for heavy surcharge pressures from the adjacent aggregate stockpiles. The sheet-piles are laterally supported by sheet-pile deadman and tierods. Slope indicator tubes were used to monitor lateral movements next to the sheet-piles. The results from the slope indicators were then used to verify …

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An Experimental Study Of The Drained Capacity Of Bucket Foundations For Offshore Applications, Lars Bo Ibsen, Amin Barari, Kim André Larsen Apr 2013

An Experimental Study Of The Drained Capacity Of Bucket Foundations For Offshore Applications, Lars Bo Ibsen, Amin Barari, Kim André Larsen

International Conference on Case Histories in Geotechnical Engineering

Today, wind energy offers the most competitive production prices for renewable energy. Therefore there are strong political and industrial forces, especially in northern Europe, which support the development of the offshore wind industry. The present paper presents the results of drained tests on offshore bucket foundations for wind turbines in saturated dense sand. The bearing capacity of bucket foundations subject to combined loadings which are of interest particularly to the offshore geotechnical engineers, were calculated and found to be largely dependent on embedment ratios and load paths. Based on the results of the analyses, new failure criteria are calibrated for …

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Analysis Of Plie Raft Interaction In Sand With Centrifuge Tests, Donggyu Park, Doohyun Kyung, Kyujin Choi, Junhwan Lee Apr 2013

Analysis Of Plie Raft Interaction In Sand With Centrifuge Tests, Donggyu Park, Doohyun Kyung, Kyujin Choi, Junhwan Lee

International Conference on Case Histories in Geotechnical Engineering

In the conventional design for piled rafts, the load capacity of the raft is not in general taken into account and the load capacity of piles is only considered for the estimation of the total load carrying capacity of the piled rafts. As a consequence, piled rafts are often designed with excessively conservative safety margin, raising a need of further investigation of the load capacity mechanism of piled rafts. In this study, a series of centrifuge load tests using model group piles and piled rafts are conducted and used to compare the axial load carrying behaviors of group piles and …

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Axial Load Behavior Of A Driven Cast-In-Situ Pile In Sand, Kevin N. Flynn, Bryan A. Mccabe, Derek Egan Apr 2013

Axial Load Behavior Of A Driven Cast-In-Situ Pile In Sand, Kevin N. Flynn, Bryan A. Mccabe, Derek Egan

International Conference on Case Histories in Geotechnical Engineering

Driven cast-in-situ (DCIS) piles are a popular choice amongst piling contractors due to the ability to readily adjust pile lengths to suit the depth of penetration required. Despite their widespread use, there is a dearth of published data on the axial load behavior of temporary-cased DCIS piles, particularly in cohesionless soils. This paper reports the results of a static compression load test on a 340 mm nominal diameter, 5.75 m long DCIS pile in a dense sand deposit in Shotton, Wales. The test pile was instrumented with vibrating-wire strain gauges at various levels to determine the shaft and base resistance …

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Bridge Foundation Piles In Varved Glaciolacustrine Deposits Exhibiting Very High Soil Setup, Gregory R. Reuter Apr 2013

Bridge Foundation Piles In Varved Glaciolacustrine Deposits Exhibiting Very High Soil Setup, Gregory R. Reuter

International Conference on Case Histories in Geotechnical Engineering

A pile-supported bridge was to be constructed at a site in Vadnais Heights, Minnesota, located north of St. Paul, in an area underlain by a significant deposit of glaciolacustrine sand, silt, and clay, which extended to a depth of about 39 m. For the geotechnical analysis, the conventional soil borings were supplemented by performing seismic piezocone (SCPTu) soundings. At the beginning of bridge construction, test piles were driven which experienced unusually easy driving to the termination depths of 38.4 to 40.2 m. High strain dynamic testing was used during pile installation and during restrike. After only a 2-day waiting period, …

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