Meeting Demands for More Highly
Precise Deep Construction
Underground Drive-Hollow Motor Execution Technology
With cities moving to use underground
space more intensively, it is necessary to develop technologies
that make possible the high- precision construction
of earth-retaining cut-off walls at great depths.
Taisei has participated in the joint development of
the world's first Underground Drive-Hollow Motor Execution
Technology (UD-HOMET), a type of in-situ churning construction
method in which the drive portion of the excavating
equipment is positioned where the screw has been discretionarily
placed, making it possible to advance the drive portion
of the excavating equipment through the earth as excavation
takes place. The development of a revolving outer motor
makes for a structure in which soil removal is not obstructed
even if the drive portion of the machine is located
in the screw section. Compared to conventional top-drive
machines, this technology makes it possible to excavate
and churn with high precision and significantly greater
stability. There are leading and flying versions of
UD-HOMET, and testing of both in the construction of
a tunnel in Osaka is providing verification of high
construction precision and low noise levels.
