-
Austrian tunnelling method, use of a
tunnel boring machine (TBM) or
tunnelling shield. But
still tunnels are
constructed which are
secured with
pit props...
-
pit was re-excavated to a
depth of 88 feet (27 m), and two more
shafts were dug. The
first one
missed its
intended target of an
alleged flood tunnel,...
- not a
tunnel,
though some
recent tunnels have used
immersed tube
construction techniques rather than
traditional tunnel boring methods. A
tunnel may be...
-
pit was dug from the
surface in
order to
access and lift the machine's
cutterhead for
repair and
partial replacement in 2015.
Bertha resumed tunnel boring...
-
rigged with
explosive booby traps or
punji stick pits. The two most
common responses in
dealing with a
tunnel opening would be to
flush the
entrance with gas...
-
Campden Tunnel Gravel Pit (grid
reference SP161408) is a 0.2-hectare (0.49-acre)
geological Site of
Special Scientific Interest in Gloucestershire, notified...
- the Yas
Marina Circuit in Abu Dhabi,
which presents a
shorter tunnel at the exit of the
pit lane.) As well as the
change of
light making visibility poor...
- via a 16,000-foot (4,900 m)
tunnel to
Pit 3 Powerhouse,
located on the
upper end of
Pit 4 Reservoir,
formed by
Pit 4 Dam.
Pit 4 is a much
smaller diversion...
-
extracts rock or
minerals from the
earth using a
pit,
sometimes known as a
borrow pit.[citation needed] Open-
pit mines are used when
deposits of commercially...
- the
pit to the
river by 88%. The colliery, however, was not a
success and
closed in 1860.
Having taken two and a half
years to build, the
tunnel was in...
