June 23, 2016
This was no ordinary routine job! Firstly, the planned tunnel path ran into 300 m of loose, watery clay, including 100 m of extremely sensitive “quick clay,” and secondly, the route was Close to a number of historical wooden buildings, perched on wooden piles. As a result, Hydraulic Impact Hammers could not be employed, as this would have created vibrations in the clay, possibly leading to disturbance and potential damage to the historical buildings.
"To meet the special demands on this job the Elemex system was a good choice. It was a continuous solution whereby we were able to get through the clay and into the bedrock in one operation. Once we got it right, it became routine."
Customer
Kynningsrud Fundamentering and sub contractor Hallingdal Bergboring.
Challenge
To efficiently drill casings through clay and bedrock while preserving the city’s cultural heritage
Our Solution
• Two modified sheet-piling units
• Two Atlas Copco QL200 DTH hammers
• 610 mm casings
• 674 oversized ring bits
• Atlas Copco Elemex system
• Vibro-Rotation method
Benefits
• Easy to adapt and use Elemex with existing rigs eg. sheet-piling unit • Ideal for urban work m
• Made to drill through overburden and rock in a single operation
• Air-flow and flushings is diverted back through the pipe minimising damage to the hole and surroundings
• Straight and fast drilled holes
Conclusion
Elemex can drill faster, straighter and further while minimising any effect on the environment.
