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  • DFI
    Geophysical Subsurface Characterization to Estimate Top-Of-Rock Elevation for Deep Foundations in Challenging Geologic Settings: Numerical Investigation of Full Waveform Tomography

    By Siavash Mahvelati, Alireza Kordjazi, Joseph Thomas Coe

    Deep foundations are often constructed as end bearing members with a significant amount of their capacity derived from bedrock. Sites with highly variable bedrock conditions therefore present a uniq

    Sep 8, 2021

  • DFI
    Ground Improvement Using Stone Columns To Mitigate Liquefaction Potential Of Fine Sand By Wet Top Feed Vibro Replacement Method – A Case Study

    By Parameswaran V. S, Anshuman Singh

    This is a case study on ground improvement using Stone columns at Kokrajhar in Assam which comes under seismic Zone V as per IS: 1893. The strata at site comprised of mostly fine sands with low SPTN v

    Nov 1, 2022

  • DFI
    Design Issues for Mini-Caissons in the NYC Area

    By Caciola Jr. Joseph J., Nidal M. AbiSaab

    "Thanks in great part to the geology of the New York City Metropolitan area, mini-caissons are a popular choice for deep foundations. These drilled elements are readily available, easy to install with

    Jan 1, 2016

  • DFI
    Innovative Deep Foundation Support Using Ductile Iron Piles

    By Thomas Billups, Brendan FitzPatrick, Doug LeDo, David Carchedi

    "Working in urban environments presents unique logistical challenges beyond those typically associated with traditional geotechnical analysis and design. These challenges often include working on site

    Jan 1, 2016

  • DFI
    Three Deep Mixing Projects: Comparison between Laboratory and Field Test Results

    By George Filz, Morales, Carlos, Bertero, Filippo Maria, Alessandro, Leoni

    "The Deep Mixing Method (DMM) represents a viable solution to improve adverse geotechnical properties of foundation soils for many practical applications. A pre-construction soil investigation campaig

    Jan 1, 2015

  • DFI
    Introduction (10b9df94-8559-46e8-b74a-5e5ae2f990b0)

    "The development of non-destructive testing (NDT) methods for deep foundations occurred in several parts of the world, gradually coming together into the present state of the art. The compilation of t

    Jan 1, 2004

  • DFI
    Quality Assessment of Seismic Data Sets and the Impact on Interval Velocity Estimates in DST

    By Gerald Verbeek, Erick Baziw

    "Downhole Seismic Testing (DST) is an important geotechnical testing technique for site characterization as it provides low strain (<10-5) in-situ interval compression (Vp) and shear (Vs) wave velocit

    Jan 1, 2017

  • DFI
    North American Geotechnical Exploration Practice ? Synopsis

    By C. O. Riggs

    Geotechnical exploration in North America, in particular, exploration for deep foundations analyses, is currently and generally performed following the most basic sampling and insitu testing methods a

    Jan 1, 2010

  • DFI
    Innovative Micropile Retrofi t of an Existing Structure

    By Kenneth R. Chadwick, Thomas J. Tuozzolo, Terence P. Holman

    "Micropiles are often installed to retrofit existing foundations that experience distortion and to underpin structures prior to future construction. The Dublin Road Pump Station project is an example

    Jan 1, 2008

  • DFI
    Rehabilitation of an Existing Mechanically Stabilized Earth Wall Using Soil Nails

    By Daniel A. Thome, Robert C. Janke

    "Installation of permanent soil nails through distressed mechanically stabilized earth retaining walls is a cost effective and aesthetically pleasing solution when using the appropriate equipment and

    Jan 1, 2005

  • DFI
    Lateral Pressure Relief by Geotextile Encased Columns (GECs) at Piled Bridge Abutments: Two Case Studies

    By Sven Schröer, Lilma Schimmel, Dimiter Alexiew

    "The Geotextile Encased Columns (GEC) deep foundation system for embankments on soft soils was introduced some 20 years ago and is now considered State-of-the-art worldwide.The GECs consist of compact

    Jan 1, 2016

  • DFI
    Behavior Of Piled Raft Foundation Systems Under A Combined Set Of Loadings

    By Renato P. Cunha

    The paper explores a parametric analysis of a four-pile group in contact (hence piled raft) and without contact (hence standard pile group) with the superficial soil layer, under a combined set of loa

    Jan 1, 2006

  • DFI
    Anchored Diaphragm Wall and Dewatering System for Libya Hotel

    By Claudio Asioli

    "The project’s goal was to construct the Al Ghazala Intercontinental, a multi-use development in the bay area of Tripoli overlooking the Mediterranean Sea. The site of the project is located approxima

    Jan 1, 2017

  • DFI
    Anchored Diaphragm Wall and Dewatering System for Libya Hotel

    By Claudio Asioli

    "The project’s goal was to construct the Al Ghazala Intercontinental, a multi-use development in the bay area of Tripoli overlooking the Mediterranean Sea. The site of the project is located approxima

    Jan 1, 2017

  • DFI
    The Use of Rigid Inclusions to Support Large Spans

    By Michael Shedlosky, Sonia Sorabella Swift, Nina Carney, David Tarasovic

    Rigid inclusions were used to support roadway fills and mechanically stabilized earth (MSE) walls for the South Capitol Street Corridor project. The first phase of this two-phase, nearly $1 billion pr

    Jan 1, 2019

  • DFI
    A Review Low Strain Integrity Testing Practices In India And Complexities Involved In Evaluation Of Test Results

    By RavikiranVaidya, Vishal Dhamecha

    Low Strain Pile Integrity Testing has been used in India since 1990’s and several have tried to demonstrate the utility and benefits of this method. However, use of this technology was limited till 19

    Sep 1, 2022

  • DFI
    The Effects of Cylindrical Pile Insertion on the Vertical Stiffness and Strength of the Surrounding Soil

    By Emre Biringen

    "Results from a small-scale laboratory experimental program show the changes in the vertical stiffness and strength of a soft clayey soil adjacent to the shaft of an inserted pile (i.e. expansion of a

    Jan 1, 2005

  • DFI
    Friction Loss in Tieback Anchors used for Landslide Stabilization

    By John P. Turner, Benjamin J. Turner

    "Tieback anchors are now used routinely for landslide stabilization in the USA and abroad. It is generally understood by design engineers that friction loss over the unbonded length of a tieback ancho

    Jan 1, 2017

  • DFI
    Evaluating Lateral Bracing Code Requirements for Large Diameter Foundations

    By Jon Huff, Jeffrey Donville, Hannah Iezzoni, Dan Stevenson

    Occasionally, in the design of deep foundations for a structure, a single deep foundation element may be used to support a building column. The most common type of element used in such cases is a dril

    Sep 8, 2021

  • DFI
    Holistic Thermal Assessment And Control Of Ground Freezing For A New Underground Station

    By Christian Leble, Dr. -Ing. Jakob Vogelsang, Dr. -Ing. Oksana Solt, Dipl. -Ing. Joachim Meier, Dr. -Ing. Wolfgang Orth

    In the course of closing the gap between the Brandenburg Gate and Alexanderplatz, the Museum Island station was built by Implenia Construction GmbH. The tunneling for the platform hall took place on a

    May 1, 2022