NATURAL GROUND REINFORCING EARTH CONSTRUCTION METHOD USING LARGE DIAMETER ROCK BOLT

摘要

PROBLEM TO BE SOLVED: To construct an anchor body with a high strength and a high quality which is adaptable for a wide range of geological structure and capable of concentrating and simplifying a construction works and enhancing the construction efficiency and accelerating the economical promotion.;SOLUTION: A double bit (5) formed separably of an outer bit (3) and an inner bit (4) is attached to the tip of a casing rod (1). A core member (2) and an injection hose (5) are set in the casing rod (1) in advance. After bed rock is drilled to a specified depth, a grouting material is charged from the injection hose into the drilled hole. The double bit is separated when pulling up the casing rod (1). The inner bit (4) and the core member (2) are left in the drilled hole, in the natural ground reinforcing earth construction method using a large diameter rock bolt.;COPYRIGHT: (C)2002,JPO