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  • DFI
    Crosshole Sonic Logging Versus Perimeter Sonic Logging: What Have We Learned?

    By Cory McElprang, Enamul Hoque, Aaron Thomas, Scott A. Jacobs

    Crosshole Sonic Logging (CSL) only evaluates concrete on the inside of reinforcing cages leaving the outside unevaluated unless other types of testing are performed such as Perimeter Sonic Logging (PS

    Jan 1, 2019

  • DFI
    Utilizing Drones to Improve Project Workflows

    By Barritt Lovelace

    Collins Engineers has been researching and implementing the use of drones on Civil Engineering Projects since 2015. Applications include bridge inspection, asset management, mapping, construction site

    Jan 1, 2019

  • DFI
    Use of Isolated Tie-Back Plates to Stabilize a Landslide in Steep Terrain

    By Scott D. Neely, Donald R. Clark

    "An existing landslide located at the southeast corner of the Telluride Regional Airport has been in an active state of failure for several years. The presence of the landslide has represented an on-g

    Jan 1, 2015

  • DFI
    Influence Of Freeze–Thaw Cycles On Strength And Heavy Mental Leaching Performance Of Petroleum Drilling Mud Stabilized By Waste

    By Tian Miaomiao, Cheng Yin, Shen Jun, Yu Hao, Li Yafei

    Vast amounts of waste drilling mud containing heavy metals is produced during oil drilling process, which causes great pollution to the environment. Therefore, it needs to be treated until it is harml

    Nov 1, 2022

  • DFI
    Evolution Of Helical Screw Pile Design And Installation

    By Michael Perlow

    Helical screw piles in use since 1838 are routinely used for energy, transportation, municipal, industrial, marine and coastal infrastructure as well as for excavation support, environmental remediati

    Jan 1, 2011

  • DFI
    Design and Construction of the New VDOT Midtown Tunnel

    By Rick Ellman, Ian Chaney

    "The Hampton Roads area encompassing the Norfolk, Virginia Beach and Newport News metropolitan region experiences some of the worst traffic congestion in Virginia. With continued growth of the ports a

    Jan 1, 2014

  • DFI
    Field Test of Braced Excavation Supported with Rows of Dry Deep Mixing Columns

    By Stefan Larsson, Sadek Baker, Razvan Ignat

    "This paper describes the execution of two full-scale field tests where a braced steel sheet pile wall interacting with rows of overlapping dry deep mixing columns was first excavated and then loaded

    Jan 1, 2015

  • DFI
    Construction of High Road Embankment over Thick Soft Silty Clay- A Case Study

    By R. Radhakrishnan, C. Gunasekaran

    "Calicut Bypass Phase-II project included construction of 7 m high embankment over soft compressible clays up to 18 m in thickness. Approx 1.5 km length of road out of a total 5 km length consisted of

    Jan 1, 2015

  • 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
    Load-Deformation Based Design of Deep Mixing for Supporting MSE Walls at Kitimat LNG, BC

    By Randy R. Williams, Brian W. Wilson, George M. Filz, Marina S. W. Li

    "Detailed design of an extensive deep mixing (DM) scheme using the Cutter Soil Mixing (CSM) technique was completed for foundation support of mechanically stabilized earth (MSE) walls for Kitimat Liqu

    Jan 1, 2015

  • DFI
    The World's Longest Directional Impact Driven Pile

    By Robert F. Stevens, Robin Givet, Kenneth Viking

    "Summary This paper describes a case of a directional pile installation conducted from an existing oil platform in the Caspian Sea, offshore Baku. Results are presented for 660 mm outer diameter (660

    Jan 1, 2014

  • DFI
    130 M Deep Bored Piles – A New Superlative

    By Vijay Kumar, Serhat Baycan, Karsten Beckhans

    For the deep foundation of podium and tower of the Kuala Lumpur City Centre, BAUER (MALAYSIA) SDN. BHD. constructed 225 bored piles with diameter range of 2.0 to 2.5 m. In order to comply with the dep

    Nov 1, 2022

  • DFI
    Drawdown of Ground Water Control System in Deep Excavation Surrounded by Cutoff Walls: Numerical Investigation

    By Dalia. R. Mohamed, Hisham H. Hafez, Marawan M. Shahien

    "Construction activities in major projects that involve deep excavations necessitate the use of vertical walls surrounding the construction site to play an important role as earth retention system. Th

    Jan 1, 2016

  • DFI
    Measurements of CDSM Strengths and Seepage Data Following Seismic Upgrades of San Pablo Dam

    By Atta B. Yiadom, A. David Miller, Robert C. Kirby, Sean M. Todaro

    "San Pablo Dam is a 170-foot (52-meter)-high earthfill embankment, located approximately 10 miles (16 kilometers) north of downtown Oakland, California, that impounds a 38,600 acre-feet (47.6 million

    Jan 1, 2015

  • DFI
    Analysis of Water Leakage in Downstream Dam Toe of Komani Dam

    By Arjan Jovani, Arjan Beqiraj, Përparim Alikaj, Altin Karriqi

    "Koman dam is one of most important high dams in Drin River Cascade. Safety of these dam is very important not only in power production but also in social and environmental aspects connected with vita

    Jan 1, 2016

  • DFI
    Stability Analysis Of A Rubble Mound Breakwater Resting On The Weak Seabed By 2D Finite Element Modelling

    By Vijaya R, Boominathan A

    The design of a rubble mound breakwater resting on a problematic seabed is quite challenging and expensive. In the present study, stage-wise construction of a typical section of the breakwater for a p

    Sep 1, 2022

  • DFI
    How Choice Of Foundation Can Alter The Fate Of A Bridge Project – 3 Case Studies

    By Alok Bhowmick

    The most uncertain and challenging part of a bridge design and construction is the ‘Choice of foundation’. During the planning and conceptual design stage, it is extremely important to choose the righ

    Nov 1, 2022

  • DFI
    Impact Of Groundwater Flow On Design Of Open Underground Excavation

    By Heman Manchanda, Sandeep Sharma

    Several infrastructure projects are in various stages of construction and planning in India and almost all of them involves open ground excavation extending to varying depths. These structures are gen

    Sep 1, 2022

  • DFI
    Deep Cfa Piles Application For Foundation In Queensland

    By Sameh M. Khella

    This paper discusses the application of deep CFA piles for the foundation of structures in different ground stratifications with a focus on the application in Queensland region. Design, construction t

    Nov 1, 2022

  • DFI
    Large Diameter Helical Piles for Refinery Expansion

    By Chris Normand, Paul Volpe, Eric Wey, Howard Perko, Burt Ogilvie, Patrick Murray

    "A refinery expansion project for Marathon Petroleum Company in Southern Louisiana required existing medium to large pipe racks to be expanded for additional capacity. Foundation modifications were ne

    Jan 1, 2017