| 摘要 |
PROBLEM TO BE SOLVED: To provide a penetration method for penetration body to natural ground allowing the penetration of a penetration body, even if long, without requiring a reaction wall requiring a large-scale facility. SOLUTION: This method comprises a towing process of towing at least one penetration body 4-1 on the penetrating directional top side as a towing penetration body every prescribed distance by a towing jack 10 set in an arrival shaft 3 and a jacking process of pushing following penetration bodies 4-2, 4-3 and 4-4 to a natural ground every prescribed distance by a pipe jack 16 as jacking penetration bodies by use of the reaction from the towing penetration body 4-1. The towing process and the jacking process are alternately repeated to penetrate the penetration bodies 4-1, 4-2, 4-3, and 4-4 into the ground. |
