SAFETY DIAGNOSIS METHOD FOR SUBSTRUCTURE OF BRIDGE

摘要

A safety diagnosis method for a substructure of a bridge is provided to easily diagnose the safety of the substructure of the bridge by measuring the subsidence of the substructure. A safety diagnosis method for a substructure(B) of a bridge includes the steps of: preparing a first pipe and a plurality of fixing members in which a protrusion is compressed by a spring to protrude outward of the first pipe; inserting a hollow second pipe into the first pipe with pressing the fixing member inward; piling bottom end portions of the first pipe and the second pipe; fixing the first pipe to an underground by rotating the protrusion of the fixing member outward by removing the second pipe from the first pipe, with the second pipe filled with clay; moving down a scale bar(40) having a graduation pin(41) on the upper portion by contacting a bottom portion of the scale bar to the substructure; and installing a scale(50) having graduations on the top surface of the first pipe.