A light rail project in Canberra utilised AMC’s customised drilling fluid system and on-site support to successfully eliminate re-drills, problems caused by water incursion and manage environmental impact.
AMC’s client was completing a significant bridge piling project for a new light rail system being built in Canberra, Australia’s capital. In the past, the client had not used drilling fluids. The client had been experiencing hole caving due to water incursion into the hole due to the close proximity to a water course.
The clients biggest challenge was being able to keep the hole open to allow for the running of the steel reinforcement and the grouting procedure. In previous operations the client had regularly experienced washouts and hole collapse due to water entering and affecting the formation, particularly when encountering swelling and fretting clays.
In the project, each hole drilled required a depth of at least 23m deep and 900mm wide for the steel reinforcement to be installed correctly.
- Successful completion of 1 hole per day (drilling with mud system, placement of steel reinforcements and grouting)
- Eliminated re-drilling, lost time and associated costs
- Prevented water incursion causing borehole collapse and delays to project continuation
- Minimised risk to the local waterways
- Minimised costs of drilling fluids through recycling.
We’re extremely happy with the methodology and products provided, the on-site support helped us to produce a successful outcome.