BEARING PLATE OF SOIL NAIL FOR PULL-OUT TEST

摘要

The present invention particularly relates to the structure of the front finger plate of the soil nail formed of a structure capable of effectively exerting a tensile force along the axis line of the soil nail and maximizing the pretension of the soil wall.;In order to achieve the above object, the nail nail 3 is inserted into the insertion hole 2 which is horizontally drilled in the retaining wall 1, and the grout 4 is formed by using mortar in the space of the insertion hole 2. After implementation, the shotcrete (5) is placed on the front wall (1) and then the polyethylene (PE) panel (6) and the pressure plate (7) is fixed, the wedge-shaped nut (20) coupled with the nail (3) It is supported by using, but the hydraulic cylinder 40 and the fixing nut 50 is sequentially installed in the rear in which the chair 30 is installed through the saw nail (3), by using the hydraulic cylinder 40 to draw force In the structure that the pre-tension is supported by moving to the fixed nut 50 and the wedge nut 20 and then supported,;The insertion hole (2) is drilled inclined downward 20 ° with respect to the horizontal line of the retaining wall (1),;A coupler 11 which mutually couples the extension nail nail 33 to secure the length required to apply a tensile force to the end of the nail nail 3 inclined in the insertion hole 2,;The chair 30 is a hollow cylindrical handle 31 is formed on the outer periphery, one end is formed with a horizontal end 32 is formed with a through hole 32a, the other end is a fastening inclined end (33) cut to 20 ° And the hydraulic cylinder 40 and the soil nails 3 and 33 are arranged in a straight line to provide a structure of the front pressure plate of the soil nail, characterized in that the tensile force acts in a straight line.;Therefore, the axis of the nail nail and the axis of the hydraulic cylinder can be arranged in a straight line to maximize the pretension.;Soil rail, pretension, chair, hydraulic cylinder, trench surface