Tunnel pushing is a contemporary
technology to construct under
passes. This process eliminates
trenching work and hence faster.
It is to push pre-cast concrete
structure in the earth to form
passages. In the process it
requires even thousands of tons
of force, depending on the
tunnel size.
Hightorque has supplied
equipment for Seven projects,
pre-cast concrete tunnel
weighing 170T to 1800T. Maximum
length of pushed is 48 mtrs in 3
segments. It is standardized to
use 200T x 500mm stroke x 700
bar jacks in parellel as
required based on the geometry
and weight of the tunnel. These
jacks are of special design to
withstand the following.
-
Higher lateral load due to
un-eveness of concrete tunnel.
-
Can work under water. (Due to
unforeseen situation water/mud
accumulates in the tunnel).
Power pack of 5 hp and 3.6 lpm at
700 bar has been standardized. To
combine more jacks for higher
thrust, multiple packs may be
combined and still the combination
performs the work successfully.
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