COIL ANCHOR FOR BURYING IN BRITTLE SOIL LAYER PART AND COLLAPSE PREVENTION METHOD IN SLOPE COLLAPSE PREVENTION CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To provide an anchor applied to a brittle soil layer formed of sediment, sand and gravel, among anchors for burying in an underground, capable of being easily advanced and preventing the agitation and plowing of the existing soil from occurring.;SOLUTION: This anchor 7 used for a brittle soil layer part is formed of a coil having an underground buried part 7a of a constant diameter of D and a constant pitch p. the coil tip 7c of the underground buried part sharpened to facilitate the advancement thereof by screwing is also put on the constant diameter D. Since a retainer for closely fitting according to the raise and fall of the earth is installed on a surface layer projected part 7b on the upper side of the underground buried part 7a and exposed to the surface of the ground, a fixing part out of a coiled shape is installed. A locking to the ground is sufficiently performed, a large extraction prevention force is generated, and a function as an anchor can be sufficiently developed also in a two layer ground with different hardnesses.;COPYRIGHT: (C)2005,JPO&NCIPI