MECHANIZED CONSTRUCTION METHOD FOR EARTH WIRE UNDER-BRACING AND EXTENDABLE EXCAVATING UNIT FOR AUGER CRANE

摘要

Disclosed are a mechanized construction method for earth wire under-bracing using au anger crane, and an extendable excavating unit for an auger crane. The extendable excavating unit is mounted to the lower end of an auger shaft of the auger crane and excavation teeth extendable and contractable is mounted to the excavating unit, thereby constructing an excavation hole suitable for the size of the earth wire under-bracing. If in case of the burial of earth wire under-bracing having a larger diameter than the excavation diameter of the existing auger crane without difficulty in a utility pole work of an existing auger crane and a burial work of small-sized earth wire under-bracing, a mechanized construction for earth wire under-bracing using an auger crane is enabled by a construction method of excavating a burial hole by extending an excavating unit.