Elements and Performance Criteria
- Plan and prepare for conducting of large diameter auger drilling
- Access, interpret and apply compliance documentation relevant to the work activity
- Obtain, confirm and apply work instructions for the allocated task
- Identify, manage and report all potential hazards
- Resolve coordination requirements with others at the site prior to commencing and during work activities
- Induct site visitors as required by procedures
- Operate large diameter auger drill
- Collar borehole, start hole, maintain hole alignment, take corrective action for deflections
- Make up appropriate drill string
- Handle additional drill stems, inserting them in the drill string
- Use appropriate gears, rotation, feed and holdback so that flights or bucket are substantially full for the soil being drilled at any given depth
- Interpret drilling factors to determine conditions at the bit
- Make and break auger string and drive head connections safely
- Maintain a clear hole and a clear bottom and deploy tools for cleaning hole bottom at completed depth
- Interpret or calculate actual depth at any point during drilling, interpret depth of strata changes and identify fill depth in any bore
- Select appropriate strategies for recovery of dropped augers
- Recover drill string using winch and/or head/kelly
- Insert surface casing and deepen hole using smaller diameter auger or bucket, if required
- Disassemble drill string and change augers and bit components
- Select bits for formation being drilled
- Select appropriate augering method for situation
- Maintain spoil removal from hole collar with appropriate safety protocols
- Cover and secure bores to ensure safety of others and crew
- Communicate effectively with crew, clients and management
- Prepare and submit paperwork for daily activities
- Ensure appropriate personal protective equipment and work clothing for the task is worn
- Constantly maintain safe working conditions
- Select and use water and drilling fluids as appropriate
- Bell foundation piles, if required
- Clean pile bases and insert reinforcement cages, if required
- Deploy bucket augers through surface casing and when drilling under bentonite muds
- Use spin off and side casting of spoil as appropriate
- Record daily hole depths and progress
- Maintain equipment
- Monitor external wear in drill string, rotate string elements to ensure even wear
- Interchange drill bits and/or drill bit elements to maintain free cutting ability
- Check all string and equipment elements for wear and proper function
- Replace worn elements in string, bits and equipment and recycle 'out of specification' equipment for repair or redundancy
- Apply lubrication as appropriate
- Maintain good housekeeping on site and for equipment in storage
- Respond to problems
- Identify possible operational problems in equipment or process
- Identify symptoms of problems needing remedial action
- Determine possible fault causes
- Rectify problem using appropriate solution within area of responsibility
- Follow through items initiated until final resolution has occurred
- Report problems outside area of responsibility to designated person