| 摘要 |
PROBLEM TO BE SOLVED: To secure work space for workers and conveying space so as to improve workability of piping by forming passages common to trucks fixed in pipeline laying work positions on rails in a pit of a shield tunnel. SOLUTION: In order to lay a conduit to be a pipeline in a shield tunnel 1, a transport truck for carry-in and transportation of equipment and materials, and rails 9 for working A-D trucks are temporarily provided. A lower part of a frame 51 to be a constituent part of the B-truck 5 is provided with a passage part 51A formed of a plate-like step leaving the passage space of the transport truck on one side in a cross direction. Also in the A-, C-, D-trucks, passages of the same height and size are formed in corresponding positions to the passage part 51A of the B-truck 5. A continuous flat passage is thereby formed for a worker to secure walk space so as to improve workability. |
