| 摘要 |
<p>PROBLEM TO BE SOLVED: To attain automatic supply of a propulsion pipe in a non-open-cut pipe jacking method, and reduce total operating time largely by minimizing the frequency of cable passing operations through the propulsion pipe. SOLUTION: A cage storing a plurality of propulsion pipes 18 at a time is formed so as to be capable of entering a vertical shaft. The propulsion pipes 18 are stored in the cage on the ground, and line connecting work of a cable, a hose and the like to be connected to a preceding body is completed in the cage. The cage is stored and disposed in the vertical shaft 10, and connection of the hoses is conducted. By repeating the operation of lowering the stored propulsion pipes at a storing pitch interval with the propulsion pipes 18 moved sequentially from the lower end of the cage to the starting position of a start rack 12, it is possible to supply continuously all of the propulsion pipes in the cage to the starting frame side.</p> |
