抄録
For the construction of the Akima Tunnel, the longest tunnel between Takasaki and Karuizawa of Hokuriku Shinkansen, as first trial on construction of a Shinkansen type tunnel, we adopted the Extruded Concrete Lining Method, for the sake of rapid construction, lavor saving and cost reduction. For transportation of concrete materials as well as muck produced in the course of the rapid excavation, we applied the pneumatic capsule transportation system. Under this system, the transport carriers (capsules) are sent out through the box route with a low pressured air current.
