Access Shafts

Spiral Drillers Civil has been installing large diameter access shafts for over 20 years. These shafts range in finished diameter from 3.6m and down to 40m in depth. Shafts provide a safe and cost effective solution construction benefit to micro-tunneling operations, pump station construction, manhole installation and even silo construction.

Our equipment and tooling capabilities combined with our drilling methods have positioned Spiral Drillers Civil as the leader in large diameter auger excavations. We have successfully excavated these large shafts under both dry and wet conditions.

Application

  • Micro-tunneling
  • Trenchless drilling
  • Manhole installation
  • Silo construction
  • Outfalls

Projects

Project Name - Queenstown Road access shaft

Project description

Drill 2.4m dia x 10m deep shaft to retrieve a locked drilling head

Machine used

Soilmec R312

Special difficulties

Traffic management required and a restricted site area to work in
Project Name - Access shaft, Orakei, Auckland

Project description

Drill 2.6mm diameter x 15m deep access shaft and install caisson onto sewer line

Machine used

Soilmec R312
Project Name - Stormwater Pipeline, Auckland

Project description

Drill 20 x 18m deep piles and place universal columns and backfill with sand for top down construction of vertical access shaft for installing new stormwater pipeline

Machine used

CM39

Special difficulties

Traffic management and assisting with silt control was required.  Piling was a continuous operation as weak ground conditions posed a potential problem