THE BEARING CAPACITY MEASUREMENT EQUIPMENT AND THE MEASURING METHOD OF LARGE DIAMETER CAST IN PLACE REINFORCED CONCRETE PILE USING THE BI-DIRECTIONS END BEARING OIL PRESSURE LOADING EQUIPMENT USING THE HIGH-PRESSURE LOADING SYSTEM

摘要

The present invention solves the problems of the arrangement and installation of the hydraulic cylinder by reducing the number of hydraulic cylinders required to meet the conventional required load capacity by building a high pressure loading system using a high pressure hydraulic cylinder and peripheral devices, and each hydraulic The purpose of the present invention is to provide a bearing capacity measuring device and measuring method for large diameter cast-in-place reinforced concrete piles through a bi-directional hydraulic loading device using a high-pressure loading system that solves the problems of the conventional low pressure method such as a problem of adjusting the amount of hydraulic pressure sent to the cylinder. have.;The device for measuring the bearing capacity of large diameter cast-in-place reinforced concrete piles through the bidirectional distal hydraulic loading device using the high-pressure loading system according to the present invention for achieving the above object is made of a circular steel sheet having a predetermined thickness and diameter as a whole. An upper plate and a lower plate having a plurality of through holes formed therethrough, and an upper and lower plate fixing device for fixing the upper plate and the lower plate at regular intervals, and a predetermined position between the rear surface of the upper plate and the upper surface of the lower plate, A loading device comprising a hydraulic cylinder for exerting a hydraulic force and a displacement measuring magnetic sensor installed in an adjacent portion of the hydraulic cylinder and measuring displacement; An upper plate displacement measuring rod installed vertically on an upper surface of the upper plate for measuring displacement of the upper plate, an upper plate displacement measuring rod casing in which the upper plate displacement measuring rod is incorporated, and a lower plate installed vertically on an upper surface of the upper plate for measuring displacement of the lower plate A displacement measuring rod comprising a displacement measuring rod and a lower plate displacement measuring rod casing in which the lower plate displacement measuring rod is embedded; Tremis tube induction device is fixed to the upper surface of the top plate to be installed to guide the through hole, a plurality of reinforcing bars are vertically coupled to the upper surface of the top plate, axial sensor coupled to the outer surface of the reinforcing bar to measure the frictional force of the strata And a sensor wire for concrete and a sensor wire which are installed for the signal and current transmission to the axial sensor and the concrete sister bar, and are coupled with a margin of a certain length so as not to be disconnected by tension, and the axial sensor and the concrete sister It is characterized by consisting of a transition measuring means of the celebration consisting of an automated measuring system for displaying and storing the value measured from the bar.;In addition, the method of measuring the bearing capacity of large-diameter site-pouring reinforced concrete piles through the bi-directional hydraulic loading device using the high-pressure loading system according to the present invention for achieving the above object is perforated the ground to have a constant size and depth vertically downward to the ground Forming a punched hole (I); Installing the bearing capacity measuring apparatus of claim 1 in the drilling hole; Inserting a treme tube to penetrate the loading device of the bearing force measuring device (III); Placing concrete in the tremis tube, but placing concrete into the through hole of the loading device through a tremis tube induction device located under the tremis tube (IV); (V) driving the loading device to expand the hydraulic cylinder when the concrete is cured; After the expansion of the hydraulic cylinder is completed, measuring the displacement of the upper and lower sides of the loading device using a displacement measuring rod, and measuring the frictional force of the ground layer in contact with the concrete by using the transition measuring means during the celebration (VI) ); It is characterized in that the step (축하) to create a distribution during the axial load with the measured frictional force.;High pressure loading system, hydraulic loading device, large diameter, site casting, reinforced concrete pile,