FREEZING METHOD OF STARTING/ARRIVAL PART OF JACKING PIPE AND SEGMENT FOR FREEZING WORK

摘要

PROBLEM TO BE SOLVED: To extremely easily improve the ground of a starting part and an arrival part of a jacking pipe, without particularly requiring a large-scale ground improvement.;SOLUTION: This segment 3 for a freezing work is built in by putting a cooling pipe formed in a coil shape capable of penetrating the jacking pipe 2 or a cooling pipe 7 composed of a cuttable construction material in a bag 5; and is arranged on the natural ground 8 of the starting part or the arrival part of the jacking pipe. The bag 5 is inflated by filling a solidifying material 6 in the bag 5, and is projected in a hollow part 4 formed in the natural ground 8 together with the cooling pipe 7. After solidifying the solidifying material 6, brine is circulated in the cooling pipe 7.;COPYRIGHT: (C)2005,JPO&NCIPI