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Drill & Blast Method

New Austrian Tunneling Method

Tunnel Boring Machines

Shield Tunnelling

Headings & Hand Tunneling

Chemical Excavation Methods

Rock TunnelsTask / DescriptionSlow  Ave  Fast   Units Excavation, non explosive chemical method, cycle time8.0 6.0 5.5  mins Excavation, non explosive chemical method, Class I Granite0.3 0.9 1.2  m3/cycle Excavation, non explosive chemical method, Cl...

Initial Tunnel Supports

Permanent Bracings

In-Situ Tunnel Linings

Tunnel Grouting

Immersed & Sunken Tubes

Micro-Tunneling

Cut and Cover Tunnels

Tunnel Leak Repairs

Pipe & Box Jacking

Hoists & Cranes

Data Date

The time at which all progress information entered for a project should be correct as of this date. The time at which all remaining work starts. This is the date when Progress is measured up to and generally coincides with the production of the Progr...

Cone Fracture Rock Breakage

Penetrating Cone Fracture Rock Breakage. Tradename of "SunBurst" from Australia.  State of the art, non-explosive chemical rock breakage technology for close proximity excavation applications in mining and civil engineering. Explosive system, cycle t...

Roof Structure

Usually carried out with a minimum of a 2 man gang, sometimes with an additional labourer. For a typical semi-detached house structure or similar...    Roof Trusses 1.28 no/hr Wall Plates 2.76 m/hr Rafters 1.17 m/hr Ceiling Joists 32.10 m/hr    

Roof Structure

Structural Steel Structures   For medium sized applications with a single crane and fixing gang.   A typical rate                  3.4 - 4.6 tonnes/day.   Structural steel for glazed wall, made of 18 no "bow string" strusses 25 m tall, cross braced a...