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Electrician (TBM)

Company: Dragados
Location: Norfolk
Posted on: November 19, 2022

Job Description:

TBM Electrician The Hampton Roads Connector Partners JV (HRCP) consisting of Dragados USA, VINCI Construction, and Flatiron, has been selected to construct the $3.3BN Design Build project; the largest civil construction contract ever awarded by the Virginia Department of Transportation (VDOT). The project scope across a9 milesection of the I-64 will include: a new 3.5-mile bridge-tunnel crossing that will accommodate a total of 8 lanes of capacity across the water, replacement of the existing marine approach bridges and the addition of a third lane on I-64 in each direction. The twin 45 diameter 1.5-mile tunnels will be bored by TBM, creating the second largest TBM tunnel opening for a TBM in North America. The project is expected to continue to the end of 2025. The Electrician must know how to appreciate many parameters in mechanics within this environment. About the HRBT Tunnel Boring Machine The HRBT tunnel boring machine is a mobile plant 425 feet long and 45 feet in diameter, equipped with recent technology (variable density) allowing it to excavate in difficult geologies. The operators carry out a permanent control of the progress of the machine, from the cockpit they regulates the pressure parameters in the excavation chamber, the pressure of the thrust cylinders, the speed of rotation of the cutting wheel and its step, the injection of 27.5 cubic yards every 6.5 feet of a two-component mortar into the annular void and follows the planned route in a 3D environment. The use of the Variable density adds to all this, the management of additional parameters which are, adjustment of the flow rates in the drilling fluid network (up to 13,200 USgpm) 3000 m3 / h, the distribution of this flow between the excavation chamber and fluidization box, and the speed and pressure in the extraction screw of the excavated materials. The TBM Operator will work jointly with a team of electricians, automation engineers, specialized mechanics, hydraulic engineers, and topographers; and is also in contact with the surface and the operator of the drilling fluid treatment plant with which determine the rheological adjustments required per the geologies crossed. This position is a key position on tunnel sites, which is why the Electrician must have applicable experience to identify incidents. The complexity of operating a machine of this diameter (45 feet), as example pressure difference between the top of the excavation chamber and the bottom is 1.4 bar (20.3 psi, and this under the ocean, in difficult geology, and in the immediate vicinity of two other tunnels open to traffic, it is in its ability to have the right reflex if an unexpected situation arises, or to be able to give the right diagnosis if there is a technical problem. Requirements

  • Minimum 5 years experience in TBM-EPB-Slurry
  • Minimum experience involving 2 TBM projects
  • PLC handling (Siemens, Allen Bradley)
  • Skills:
    • Electricity knowledge, read and understand LV and MV diagrams / workshops / drawings / manuals / spare parts list
    • Mount/Dismantle any type of electric engines.
    • Mount/Dismantle any type of water/slurry/hydraulic pumps.
    • Diagnostic of failures and abilities to perform maintenance, improve performance and general services in equipment, such us:
      • Generators / compressors
      • Lightning (inside/outside)
      • (Gantry crane, tower crane, mobile crane.)
      • Batching/ grouting plants.
      • Water treatment plants / Water purifiers.
      • Dewatering systems.
      • Slurry plants / Conveyor belts
      • Distribution panels, fuses, connections.
      • Substation Transformers.
      • Frequency converters / Variable frequency drive
      • Drills / Jumbos (Tamrocks, Atlas Copco) / Robojets
      • Safety and emergency equipment.
      • Cars/Trucks.
      • Guidance systems (TACS, ZED).
      • Wires / Cable connections / Couplings
      • Negotiating difficult decisions with colleagues, senior management, and third parties.Delivering results on time, within the stated budget, and to the highest specification.
      • On-the go trouble-solver capacities. You will be required to wear personal protective equipment such as helmets, gloves, coveralls, glasses, goggles, respirators and safety shoes continuously for the duration of the work shift (day/night). Work is performed in underground conditions (tunnel) in areas where potentially harmful physical and chemical agents are present (e.g. fumes, noise, dust, heat, ionizing and non-ionizing radiation and chemicals). You will be required to participate in medical surveillance programs.

Keywords: Dragados, Norfolk , Electrician (TBM), Other , Norfolk, Virginia

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