Tutor Perini     Construction     General Contracting     CA-Los Angeles     June 12, 2020

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Tutor Perini

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Extraordinary projects need vision and precision to be exceptional. They need Tutor Perini.

Position Overview

The position is responsible for maintaining the line and grade of the tunnel while steering the TBM, as well as fully operate the Earth Pressure Balance Machine (EPB). Qualified candidates will be required to execute grouting of annular gap behind the segmental tunnel lining, soil conditioning as required, shield gap injection with bentonite, mucking operations within the TBM and the extension of supply pipes and gantry rail.

The essential functions of the position are:

  • Maintain line and grade of the tunnel, possessing extensive knowledge of TBM tunneling guidance system and ring prediction program
  • Ensure that TBM tunnel total station is set properly and communicates accurately with the TBM guidance system
  • Responsible for TBM operations in accordance with the manufactures guidelines. This covers all machine parameters to be used along the tunnel including:
    • Maintenance of face pressure within the bulkhead and screw conveyor
    • Ensure accuracy of specified thrust load for each ram or group of rams to avoid cracking of the segmental lining
    • Monitoring grease consumption for the bearing sealing system to seal against face pressure, hydrostatic and annular grout pressure
  • Responsible for monitoring the excavated material throughout the mining cycle to minimize the risk of potential settlement


We are an Equal Opportunity Employer (EOE AA M/F/Vet/Disability)

Los Angeles, CA Construction-General Contracting

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