| 摘要 |
An end anchorage of a permanent anchor is provided to reduce a period of construction by fixing anchor blades and pulling out a strand simultaneously, and to increase construction quality and safety by preventing the deformation by earth pressure and having excellent resistance to tensile stress, shear stress and bending moment. An end anchorage of a permanent anchor includes a strand(L) formed by twisting many wires spirally and inserted to an anchor hole, and an end anchorage(100) coupled to one end of the strand and inserted to the anchor hole together with the strand. The end anchorage includes an air hose(110) extended to the inside of the anchor hole and connected to the end anchorage to let the outside compressed air in, many anchor blades(120) provided with a coupling hole at one side to be moved and extended to the outside ground on the axial line of the anchor hole and formed at an acute angle at the other side to be anchored to the ground at expansion, an anchor head(130) coupled with the anchor blades at the circumference, attached with the anchor blades moved and expanded to the ground by high pressure compressed air flew in from the air hose and provided with many anchor blade joints(132) having hinge holes(133) to couple the anchor blades, a compressed air inflow hole formed on one side of a strand joint and connected with the air hose to let the outside compressed air in and many compressed air injection holes connected to the compressed air inflow hole to inject compressed air into the anchor blade joints to make the anchor blades expanded to the ground of the anchor hole, and a strand joint(140) unified with the anchor head and provided with a ÝÀ-shaped fitting hole to fix an end of the strand in a ÝÀ-shape. |
