AXIAL FORCE INTRODUCTION AND REMOVING DEVICE OF STEEL LANDSLIDE-PROTECTION WALL TIMBERING

摘要

PURPOSE:To prevent the peripheral ground from settling with underground excavation by providing a device provided with a hydraulic jack, a reaction force base and a rotary stopper to frame bodies of high tensile strength steel. CONSTITUTION:A hydraulic jack 4 is operated to open frame bodies 1 and 2, and they are rotated to provide to a landslide protection wall timbering 10 introducing and removing the axial force. Hydraulic jacks 7 and 7' are pressured and operated, and after inserting a landslide protection wall timbering 11 into a gap between landslide protection wall timberings 10 and 12, the hydraulic jacks 7 and 7' reduce their pressure to introduce the axial force. The hydraulic jacks 7 and 7' are pressured and operated to remove the landslide protection wall timbering 11, and the hydraulic jacks 7 and 7' are operated with reduced pressure to remove the axial force. According to the constitution, there is no damage and scrap in the land-slide protection wall timberings (H shape steels), and a cost can be reduced.