| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of a deep layer breakdown suppression construction.SOLUTION: An inventive breakdown suppression structure for suppressing breakdown of a deep layer occurring between a stable soil mass G1 and an unstable soil mass G2 includes: a first anchorage part 11 disposed in the stable soil mass G1; a second anchorage part 12 disposed in the unstable soil mass G2; and a free length part 13 connecting the first anchorage part 11 and the second anchorage part 12 to each other in a tensioned state and including a plurality of PC steel members 14. A main pipe part 27 composed of the first anchorage part 11, the second anchorage part 12, and the free length part 13 is constructed in a cylindrical shape, thereby imparting a function as a suppressing construction. In addition, occurrence of the deep layer breakdown can be effectively prevented by communicating branch pipes 25 with the free length part 13. |
