| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a form for filling a filler material in a conduit pipe protecting tunnel capable of remarkably reducing the load of transferring and layout work inside a tunnel by man power, simplifying fitting of a conduit pipe and split bodies, easily preventing a leakage of the filler material, and further, being adaptable to a procedure for placing the filler material which is stepwisely performed. <P>SOLUTION: The filler material is packed inside a gas conduit pipe protecting tunnel 2 having a gas conduit pipe 1 inserted therein, substantially at the center thereof, and partitions the gas conduit pipe protection tunnel 2 at predetermined intervals in the axial direction. A cylindrical body 4 having a gas conduit pipe hole 3 in which the gas conduit pipe 1 is inserted is formed of a foamed resin. The cylindrical body 4 is split horizontally into four, and the gas conduit pipe hole 3 split horizontally in two is formed in each of upper and lower split bodies 4b and 4c at the intermediate part. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
