| 摘要 |
PURPOSE:To attain miniaturization and cost reduction of a reaction anchor pile for screw auger by a method in which in the reaction anchor pile having an injection tube and a discharge tube for refrigerant, a refrigerant through hole is formed in the screw of a refrigeration section for obtaining the bulb pile of frozen soil and a refrigerant is circulated in the screw. CONSTITUTION:An auger body 1 is housed with a refrigerant injection tube 2 and a refrigerant discharge tube 3, and a screw 4 is formed on the periphery of the body 1. A refrigerant through hole 6 is formed in the screw 4 on the periphery of the refrigeration section, and the injection tube 2 and the discharge tube 3 are separately covered with a heat insulator 7 to avoid the release of heat from them. Since even the screw 4 of the refrigeration section of the pile has the refrigerant-circulating structure, a performance similar to the refrigeration capacity possessed by a pile with larger diameters can be obtained by the pile with small diameters, the need to enlarge the diameter of piles in order to increase the refrigeration performance can be eliminated, the maintenance cost and construction period can be reduced, and the bulb-footing 8 of frozen soil can be formed in a shorter time. |
