Posted on: November 19, 2022
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)
- 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.
- 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
Keywords: Dragados, Norfolk , Electrician (TBM), Other , Norfolk, Virginia
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