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  • DFI
    Comparative Study On Numerical Analysis Of Laterally Loaded Pile

    By Tiruvengala Padma, Nilesh Naik

    Piles are common type of deep foundation elements used for the special bridges, transmission towers, Jetties, and tall structures. Lateral loads on the structures can be due to either earth pressures,

    Sep 1, 2022

  • DFI
    Seismic Rehabilitation Of Seattle's Pier 69

    By David Pierce

    The Port of Seattle, one of the largest on the west coast of North America, made a strong statement regarding their support for reusing existing structures when a decision was made to rehabilitate Pie

    Jan 1, 1992

  • DFI
    Construction of 10’ Diameter Shafts for the Olmsted Approach Walls Project

    By Thomas G. Tavernaro, Jeffrey A. Schaefer

    "The $106 million Olmsted Approach Walls Project, completed in the spring of 2004 by Massman Construction Co., Kansas City, MO, is one phase of a new $1.4 billion Corps of Engineers locks and dam faci

    Jan 1, 2006

  • DFI
    Installation and Efficiency of Common Helical Pile Couplings

    By Jason Herron, Joseph Brown

    The common couplings for joining sections of helical piles with an outside diameter of 6.625 inches and 8.625 inches are square on square, flange to flange, external pipe sleeve, internal pipe sleeve,

    Jan 1, 2019

  • DFI
    Failure Analysis and Strengthening of Tailing Pond Embankment by Prefabricated Vertical Drains and Geogrid

    By Anup Kumar Mandal, Sanjoy Chowdhury, Biswajit Das

    "Tailing pond of an iron ore mine necessitated raising the height of its embankment to create additional storage capacity. The tailing pond is located in eastern India and raising the height of embank

    Jan 1, 2015

  • DFI
    Deep Foundation Ground Anchors In The Wind Energy Industry - Current Status Of Design And Construction Practices And Introduction Of A Patented System To Improve Foundation Performance

    By Josef K. Alter

    Long-term performance and behavior of post-tensioned ground anchors subjected to axial cyclic loading constitutes an important aspect of the stability, reliability and overall performance of wind turb

    Jan 1, 2010

  • DFI
    Evaluation of Elongation Criteria and Friction Loss in Ground Anchors

    By John P. Turner, Benjamin J. Turner

    "This report describes a research project for evaluating the applicability of the widely accepted 80 percent criterion for elongation of ground anchors to anchors with unbonded lengths exceeding 100 f

    Jan 1, 2017

  • DFI
    Strength Behavior of Soilcrete Improved by Cement and Metakaolin

    By Guo Qian, Du Guangyin, Deng Yongfeng, Liu Songyu, Wang Ningping

    "Metakaolin (MK) can efficiently enhance the strength and the impermeability of concretes and mortars. However, it has rarely been attempted in admixtures of cement-stabilized soils until presently. A

    Jan 1, 2015

  • DFI
    A Case Study Of Deep Shaft Excavation In River Channel Soil Deposit In Kolkata

    By Kaustuv Bhattacharya, Manish Kumar, Nirbhay Singh, Prodyot Kr. Ray, Praveen Soin

    This paper highlights salient features of an excavation 38 m (Length) by 10 m (Width) by 24 m (Depth) carried out in Central Kolkata. Secant pile wall (SPW) formed using a combination of alternating 1

    Sep 1, 2022

  • DFI
    Comparison of Numerical Predictions Using P-Y Curves and Finite Element Analyses of Monopiles of Ocean Energy Converters under a Very Large Number of Low Amplitude Lateral Load Cycles

    By Deepak Pappusetty, Miguel A. Pando

    This study is motivated from the increased interest in recent years to explore use of Ocean Energy Converters (OEC’s).OEC’s can be tidal or generate electricity from wave or current action. Design of

    Jan 1, 2015

  • DFI
    Effects of Stratigraphy on the Response of Energy Piles

    By Arash Saeidi-Rashk-Olia, Dunja Peric

    Energy piles are gaining increased popularity due to a growing demand for clean energy. To further advance the understanding of soil-structure interaction in energy piles, recently-derived analytical

    Sep 8, 2021

  • DFI
    Integrity Testing of Drilled Displacement Piles at a Major Campus

    By Mark D. Fuhriman, Parham Khoshkbari, Robert Fosse

    Drilled displacement piles are becoming an increasingly common deep foundation choice for their relatively simple installation methods, applicability to a wide range of subsurface conditions, and vers

    Sep 8, 2021

  • DFI
    Lateral Response of Large Diameter Drilled Shafts in Clay

    By Ke Yang, Robert Liang

    "Drilled shaft foundations are widely used for many types of structures, especially for highway bridges, high rise buildings, and costal structures. The lateral design considerations are crucial for t

    Jan 1, 2005

  • DFI
    Liquefaction Susceptibility Evaluation using Site-Specific Seismic Demands in the San Jose Area

    By Martin Walker, Joseph Ang, Jongwon Lee, Alvin Bayudanto, Lilian Lorincz, Morteza Khorshidi, Wenyong Rong

    This paper presents a case history of liquefaction susceptibility evaluation study for a major infrastructure project in the San José area. The subsurface material of the study area consists of Holoce

    Sep 8, 2021

  • DFI
    Optimization of Deep Foundation Design in a Sand, Gravel and Cobble Formation - Using Pressuremeter Testing In Slotted Sleeve Casing (8ff70823-b892-4925-865f-fae636443d0f)

    By Emad Farouz, Roger Failmezger

    "The proposed reconstruction of I-75 downtown consists of widening an approximately 2.46 Km section of IR-75 through the northern section of downtown Dayton, OH, USA. Bridge B-13 is a 9-span continuos

    Jan 1, 2007

  • DFI
    Optimization of Deep Foundation Design in a Sand, Gravel and Cobble Formation USING PRESSUREMETER TESTING IN SLOTTED SLEEVE CASING

    By Emad Farouz, Roger Failmezger

    "The proposed reconstruction of I-75 downtown consists of widening an approximately 2.46 Km section of IR-75 through the northern section of downtown Dayton, OH, USA. Bridge B-13 is a 9-span continuos

    Jan 1, 2007

  • DFI
    DFI Mission Executed Through Growth of Micropile Technology

    By Jim Bruce, Peggy Hagerty Duffy, Mary Ellen Large, Allen Cadden

    "Over the past 40 years, Deep Foundations Institute (DFI) has executed its mission “to bring together multi-disciplined individuals and organizations to find common ground and create a shared vision a

    Jan 1, 2017

  • DFI
    Investigating Reinforcing Effects of Soil-Cement Columns in Liquefiable Sand Using Dynamic Centrifuge Tests

    By C. Guney Olgun, Mohammad Khosravi, Daniel W. Wilson, Deepak Rayamajhi, Scott A. Ashford, Shuji Tamura, Ross W. Boulanger

    "Dynamic centrifuge tests were performed on unimproved and improved soil with soil-cement column models. The reinforcing effect of isolated soil-cement columns for reducing liquefaction potential and

    Jan 1, 2015

  • DFI
    Model Specification Helical Pile Foundations Compression Applications

    "This model specification includes sample text shown in normal font with commentary in italics. The commentary is intended to highlight project-specific items the specification writer should consider

    Jan 1, 2015

  • DFI
    Analysis of Pile Interaction under Lateral Cyclic Load in Cohesiooless Soil

    By Sudip Basack

    "The topic of pile foundation subjected to lateral cyclic load is an age-old problem confronted by Geotechnical Engineers. The environment prevalent in ocean and shorelines necessitates the piles supp

    Jan 1, 2005