NAGOYA—Soft ground in Aichi Prefecture will delay completion of a tunnel for the magnetic-levitation ... the company said it will review construction methods after finding part of the soil ...

Tunnel workers gather the muck and dirt as it pours in. They toss the dirt on conveyor belts, which carry the excess soil out of the tunnel. The cylinder supports the sandy soil while tunnel ...

The soil beneath this city is soft and sandy ... tunnel through this loose, shifting ground! Hint: The tunnel score will help you compare the different methods. A score of 100 is the best solution ...