Docking point can be selected freely without any restrictions
of surface traffic, underground utilities or submarine conditions.
Safe and reliable
Docking and dismantling
of shield machines has been done in narrow space where the ground
was exposed. The Mechanical Shield Docking (MSD) Method enables steel
rings to directly bear earth and water pressures, and ensures safe
and reliable work without exposing the ground.
No adverse effects on the surrounding
The MSD Method causes neither ground settlement nor
uplift and involves no surface work, so it has no effects on surface
traffic or the neighboring environment.
Shortening of construction period
The MSD Method requires no auxiliary measures and
enables easy mechanical shield docking, so it achieves a reduction
of construction time, compared to conventional methods.
Costs can be reduced because no auxiliary measures
for stabilizing the ground and shaft are required.
Construction of gas pipeline at the new Nagoya
thermal power plant
Diameter: 4.10 m
Length: 1515 m (707 m + 808 m)
Shield type: Slurry shield
Soil at the docking point: Clay and sand
Thrusting shield machine
Accepting shield machine
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