Patent ID: 7380462

Claim:
An apparatus for measuring a supporting force of ferroconcrete piles installed at a scene by means of a bi-directional front end oil pressure loading apparatus using a high pressure loading system, comprising: a loading apparatus including a steel plate having a predetermined thickness and diameter, upper and lower discs having penetration holes formed therein for passing a fixing member for separating the upper and lower discs by a predetermined distance, an oil pressure cylinder for producing an oil pressure force, and a sensor installed adjacent to the oil pressure cylinder for measuring a displacement; a displacement measuring arrangement including an upper displacement measuring rod coupled to the upper disc for measuring a displacement of the upper disc, and a lower displacement measuring rod coupled to the upper disc for measuring a displacement of the lower disc; and a load transition measuring instrument including a tremie induction tube coupled to the upper disc for guiding concrete to the penetration holes, iron elements coupled to the upper disc, an axis load sensor coupled to the iron elements for measuring ground abrasion, a sensor line for transferring at least one of a signal and a current to the axis load sensor, and a measuring system for storing and displaying measured data from the axis load sensor.