Dimitrios C. Konstantakos, P.E. CEO Deep Excavation LLC. Tel:

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1 Dimitrios C. Konstantakos, P.E. CEO Deep Excavation LLC Chair of Earth Retaining Structures Committee of ASCE/G-I Adjunct Professor Civil Engineering New York University Tel: RESUME Mr. Konstantakos is the CEO and founder of Deep Excavation LLC, and also serves as the chair of the Earth Retaining Structures Committee of ASCE/G-I. He is managing the company operations and holds a Masters of Science degree from Massachusetts Institute of Technology and a Bachelor of Science from University of Massachusetts in Lowell. Mr. Konstantakos has considerable international involvement and experience. His areas of specialization are deep excavations, soil-structure interaction, slope stability, helical piles, and software development with relative publications. Mr. Konstantakos has applied his passion for deep excavation design and has been the master developer of the international software program DeepEX dedicated to the subject. The DeepEX software is currently used by more than 1200 engineers and contractors worldwide and embodies a wide range of standards and specifications. He holds professional licenses in New York and in Europe. Mr. Konstantakos has worked on many important international projects for slope stability, pile foundations, and braced excavations, including the World Trade Center recovery efforts in Beyond promoting the DeepEX software, Mr. Konstantakos has enriched the website (which he developed from 2000) essentially creating an online library for deep excavations and helping fellow engineers and contractors address related issues. He is the chair of the earth retaining structures committee of ASCE/G-I and has developed the new official website for the committee at He is a vocal advocate of issues that face the geotechnical engineering community and tries to raise awareness of the important role that geotechnical engineers play. Dimitrios Konstantakos, P.E. 1

2 EDUCATION 2000 Massachusetts Institute of Technology, Masters of Science, Civil Engineering, Geotechnical, GPA 4.64/ University of Massachusetts Lowell, BSE, Civil Engineering, GPA 3.64/4.00 PROFESSIONAL ASSOCIATIONS Chair of Earth Retaining Structures Committee of ASCE/G-I Served as Track Chair for Earth Retaining Structures sessions at IFCEE 2015 Member of ASCE, Member DFI Member of DFI Committee on Helical Piles and Tiebacks WORK EXPERIENCE 2002 Present: Founder and CEO of Deep Excavation LLC, Astoria, New York providing software and geotechnical engineering services (). Master developer of DeepEX software program, design of deep excavations, slope stability, soil nailing, underpinning, helical piles Present: Adjunct Professor, Civil & Urban Engineering Department, New York University, New York, NY: Teaching online class on support of excavation systems : Geognosis AE, Salonika, Greece: External consultant for geotechnical and underground projects : Mueser Rutledge Consulting Engineers, New York, NY, Geotechnical engineer: Involved in design of bridge foundations, cut and cover or rock mined tunnels, deep excavations, finite element simulations, piers and bulkheads, cellular cofferdams, pile foundations, and field inspection. Presented internal presentations for finite element simulations, lateral pile capacity methods, and deep excavations. Performed assistant project manager duties on a number of projects : Massachusetts Institute of Technology, Cambridge MA, Graduate research assistant: Researched and summarized the performance of nearly 30 slurry wall supported excavations in the United States : Centers for Learning, University of Massachusetts Lowell, Tutor: Hired by the University as a professional tutor. Assisted students and organized exam reviews for more than 15 subjects in science, math, and engineering Summer: City Hall of Trikala, Greece, Surveyor: Performed surveying and road layout duties Summer: Public Power Corporation of Greece, Mesohora Hydroelectric Project, EIT. Dimitrios Konstantakos, P.E. 2

3 PROFESSIONAL LICENSES & TRAINING Professional Engineer, New York European geotechnical engineering license OSHA 40hr Hazmat Training NOTABLE PROJECTS Regional Transit Corridor, Los Angeles, CA: Analyzed and prepared design basis reports for evaluating wall bending moments and tieback forces for a 90ft (27.5m) deep soldier pile wall excavation supported by tiebacks. Examined two subway stations and provided consulting services to main consultant. New Apple Headquarters, Cupertino CA: A challenging 60ft (18m) deep excavation for the new Apple Headquarters Landmark building involved soldier pile walls with tiebacks and soil nailing. Assisted main consultant in evaluating earth pressures and different support of excavation alternatives using advanced analysis methods that incorporated the response of the permanent structure. Hudson Yards, New York, NY: The $1 billion project involved excavation with sheet pile walls supported by tiebacks. Assisted main consultant with excavation support design and also with providing an internal waler connection to the sheet piles so that walers did not interfere with the basement walls. New Tappan Zee Bridge, New York, NY: The $3 billion project involved construction of sheet pile cofferdams within the Hudson River. Assisted main consultant with establishing main analysis model and reviewing results. Kerameikos Station, Athens Metro, Greece: Analyzed and helped in the redesign of an abandoned 22m excavation for 13 years where existing temporary ground anchors (approximately 20m long) had experienced corrosion. Provided an innovative solution for stabilizing the excavation with underwater slab pouring while minimizing risk. Lehman College, Bronx, NY: Design of shoring and underpinning system for new University Science facility for the City University of New York. Manatee dam expansion, Florida: Finite element analysis of a cofferdam excavation within the dam. Project was also referenced in "Deep Marine Foundations - A Perspective on the Design and Construction of Deep Marine Foundations, (DFI)". Martinsburg (West Virginia- USA) ESSROC Cement Corp. Coal Storage and Kiln Feeding Plant: Design of retaining walls for coal storage, design of slab system to account for significant length variability due to irregular Karstic bedrock surface. Newtown Creek water treatment plant, Queens, NY: Design of deep excavations and pile foundations for a $1 billion project. Determined lateral load capacity of pile foundations for wind and seismic conditions. Dimitrios Konstantakos, P.E. 3

4 One Bryant Park, New York, NY: Analysis and design of a deep excavation in rock 1.5 m close to a sensitive existing subway tunnel for a new Bank of America building. Panorama Cultural Center, Greece: Design of a 65ft (20m) deep soil nailing wall for a new cultural center according to EC7 standards. Pile foundations: DOMAC MA, Peerless Importers NY, Metro North NY, Russia Wharf MA, 7 World Trade Center NY, JFK Air Train NY, Maher Terminals NJ, Newport office center NJ. South Ferry Terminal, New York, NY: Prepared all the major rock excavation support analyses and analyzed major underpinning works of an existing subway line. World Trade Center recovery efforts, New York, NY: Prepared the slurry wall capacity charts for the initial rescue efforts and also analyzed the slurry wall excavation with various scenarios. DEVELOPED COMPUTER SOFTWARE PROGRAMS DeepEX: HelixPile: SiteMaster: SnailPlus: SteelBeam: SteelConnect: Trench: WickDrains: 3Deep: RC-Solver: Our flagship software program dedicated to the analysis and design of deep excavations. DeepEX is the most complete and modern available deep excavation package and utilizes both traditional and advanced finite element analysis methods. A software program for the analysis and design of helical pile foundations. The program incorporates many of the latest recommendations and standards. A software program for processing and presenting slope inclinometer results. It has the ability to process inclinometer data from almost any manufacturer. A software program for the analysis and design of soil nail walls with FHWA and EC standards. A software program for the analysis and design of standard steel beams and columns according to AISC standards. A software program for the analysis and design of typical steel connections according to AISC standards. Trench is a software program that analyzes the two dimensional and three dimensional stability of panels and trenches supported by bentonite slurry. A software program for the evaluation of wickdrain assisted consolidation of compressible soil layers. A virtual reality software program for deep excavations and underground projects. A software program for the analysis and design of reinforced concrete members with EC2, EC8 standards. Dimitrios Konstantakos, P.E. 4

5 PUBLICATIONS Apparent earth pressures below the lowest support level, D. Konstantakos, IFCEE 2015, Joint ADSC/DFI/ASCE- GI conference, San Antonio, TX, March "Settlement based performance of helical piles", D. Konstantakos, M. Perlow, DFI Helical Piles and Tiebacks Seminar, St. Charles, MO, April 4, "Geotechnical activity index": Mr. Konstantakos compiles and publishes the monthly geotechnical activity index for all USA states. The index is published at the following address: /en/geotechnical-activityindex "Evaluation of Eurocode 7 and AASHTO load factor and resistance design methods for benchmarked braced excavations", South Korean Engineering Conference, Seoul, Korea, March ''Evaluation of AASHTO load and resistance design methods for benchmarked braced excavations", ASCE Conf. Proc, ASCE geocongress conference 3, Oakland, CA, March 25-29, ''Advantages and limitations of ultimate limit state design methods for braced excavations'', ASCE Conf. Proc. doi: /41128(384)82, Earth Retention Conference 3, Bellevue, Seattle, WA, August 1-4, ''Finite element analyses and cofferdam excavations'', Deep Marine Foundations - A Perspective on the Design and Construction of Deep Marine Foundations, (DFI), article #1651; publication #88 (MRNE-2009). ''Online database of deep excavation performance and prediction'', 6th International Conference on Case Histories in Geotechnical Engineering, Arlington, VA, August 11-16, One Bryant Park Creating the Underground Manhattan Schist Arc De Triumph, May 2005, ASCE Seminar in Underground Construction in Urban Environments, New York, NY, May 11-12, Control of ground movements for a multi-level-anchored diaphragm wall during excavation, Paper 5.68, 5 th International Conference on Case Histories in Geotechnical Engineering in New York, NY, April Article also published as featured case study in the 17 th newsletter by Plaxis BV, Netherlands. Dimitrios Konstantakos, P.E. 5