Upslope Mass Soil Nails, Mesh and Shotcrete
Watch Video Specific aspects: 20,000 year old glaciers formations are now boulders stacked up to 400m high up the slope in several sections. Due to Snowy 2 requiring more lane width for huge plant/equipment, extra widening of the existing single road access track was critical. Engineers consulted with Spec Geo to design the following:
Galvanised 38mm hollow bar drilled from 9m to 45m per bolt. A total of 20,000 metres installed.
Custom temporary catch fences above each site supplied and installed by SG.
Single twist high tensile mesh applied and tensioned to boulders.
Coloured shotcrete applied in various sections.
Access: Pre cut single lane benches for all plant and equipment along a heavy utilised access road for construction of the Mighty Snowy 2.
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Upslope Extreme Access Rock Bolting
Watch Video Specific Aspects: Large boulders were presenting climbers and walkers with a risk of detaching and falling into the public access route. Several 4mtr CT Rock bolts were drilled, placed and grouted to eradicate the rockfall risk.
Access to site: EXTREME-REMOTE
Helicopter lift all plant & materials.
1.5 hour climb in and out daily.
720metres above sea level with severe wind conditions.
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Large Boulder Removal in Remote Location
Watch Video Specific Aspects: A large section of massive sandstone had become loose and fell over 100m below the walking track. However a further 100m3 of boulder remained hung up on or above the public walk way. Spec Geo was commissioned to implement a solution and follow through with the removal of remaining blocks by use of drilling and blasting. A final ripe access groom of face ensured that the area was free of rock fall risk.
Access to site: 20min climb in and out via rope access.
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