Prepare, position, level and set up the coring rig, drill rods, core barrels, bits, pumps and associated accessories at approved test locations.
Operate the coring equipment to drill to specified locations, depths and diameters in accordance with the approved coring plan and instructions from the Coring Engineer / Site Supervisor.
Control drilling parameters,including penetration rate, rotation, water circulation and applied pressure,to minimise sample disturbance and maximise core recovery.
Retrieve, handle and arrange core samples sequentially in labelled core boxes, maintaining correct depth identification and traceability for inspection and testing.
Assist the Coring Engineer in measuring core recovery, recording drilling depths, ground conditions,obstructions, equipment readings and unusual observations in daily coring records.
Identify low recovery, voids,weak or inconsistent material and drilling abnormalities; promptly report findings without altering or substituting samples.
Carry out pre-use inspections,routine cleaning, lubrication, replacement of worn drill bits and basic preventive maintenance; report defects and isolate unsafe equipment.
Assist in mobilisation and demobilisation of coring equipment and maintain accurate equipment and consumables usage records.
Requirements:
Practical experience in core drilling / geotechnical coring operations and safe operation of relevant drilling equipment.
Ability to recognise drilling conditions and adjust operating methods to protect sample quality and equipment.
At least 3 years of relevant experience in construction industry
Physically fit and able to work in a fast-paced construction site environment.
Familiar with Singapore construction industry practices and workplace safety regulations.
Must be willing to work on day and/or night shift, 8.00am to 8.00pm or 8.00pm to 8.00am