ROBBINS

SBU DIVISION
Metric Version

DOUBLE SHIELD TBM (SBU-DS)
The Double Shield TBM (SBU-DS) is ideal for long tunnels (up to 3 km) without
intermediate access. The SBU-DS is a manned-entry, hard rock tunnel boring
machine. The machine is used in conjunction with a single-track back-up system
for auxiliary functions. In unstable ground, the SBU-DS can erect liner within the
tail skin, while in stable ground the machine can be used without lining. Muck is
removed using muck trains with conveyor-loading muck skips.

SBU-DS APPLICATIONS
• Long tunnels with no
intermediate access
• Line- and grade-sensitive
t
tunnelling
• Bore lengths up to 3,000+ m

GUIDED BORING
The SBU-DS can be steered
throughout the drive using hydraulic
stabilizer pads and articulation
cylinders. Line and grade accuracy
is continuously monitored with a
laser targeting system.

TUNNELLING WITH
NO LIMITATIONS
t

Not just for utility crossings, the
SBU-DS can bore entire tunnels in
much harder rock than other SBU
Division products. A ring bearing
and bull gear drive allow for larger
diameter 17 inch disc cutters to be
used, with greater thrust and higher
torque. The machine is capable of
boring in rock of 300 MPa UCS or
higher over long distances.

AVAILABLE FOR
PURCHASE OR LEASE