APPARATUS FOR TESTING SHEAR STRESS IN TEST BORE HOLE

摘要

The present invention relates to an in-shear test device, a probe member to be inserted into the borehole, a pneumatic member that moves the probe member to be in close contact with the ground layer of the borehole inner wall surface, and a probe member in close contact with the ground layer at a constant speed In an in-shear shear test apparatus composed of an operation member for moving to a tester body, a test device body positioned above the borehole, and a display device connected to the test device body to display a measured value,;It is coupled to the lower portion of the test device body, the connecting rod to be connected to a predetermined depth of the borehole, the auxiliary probe provided at the end of the connecting rod to remove the resistance of the end of the borehole, coupled to the bottom of the auxiliary probe to be in close contact with the borehole inner wall A pneumatic member including a probe member forming a main probe, a power unit for generating pneumatic pressure, an adjusting unit for controlling the pneumatic pressure generated in the power unit, a pneumatic member forming a piping unit for transferring pneumatic pressure, A BLDC motor configured to be driven, a motor shaft protruding from one side of the BLDC motor to rotate, a belt connecting the rotation of the motor shaft, a reverse rotation prevention clutch connected to the belt and rotating according to the rotation of the motor shaft; A worm gear connected to the anti-rotation clutch and rotated according to the rotation of the motor shaft, and a screw engaged with the worm gear to rotate; An operating member having a gear, a load cell for measuring a rising force of the probe member, located at the bottom of the screw gear; Probe control lever to adjust the pressure of the probe member, the operation lever unit for driving the BLDC motor, the power supply for connecting the power supply and in case of emergency power supply, and control the speed of the BLDC motor And a speed adjusting lever for measuring the load, a measuring unit for displaying the measured value of the load cell, a test unit body having a connection part for connecting the measured result to the outside, and a measured value measured in the BLDC motor and the load cell. And a display and storage device for storing.;Therefore, the present invention has an effect of obtaining a more accurate shear force value by removing an obstacle on the top of the probe during the shear test by installing an auxiliary probe at the top of the test section in the borehole.;In addition, by forming an elastic portion in the main probe in close contact with the strata, and by providing a BLDC motor and a connecting portion in the shear test apparatus, it is an advantageous design to obtain more accurate results in the strata shear force test and measurement in the borehole.;Shear test, probe, elastic part, piston