Rotary disc deep base point displacement meter and measuring method thereof

Abstract

The invention relates to a rotary disc deep base point displacement meter and a measuring method thereof, which are suitable for measuring the axial displacement along drilling holes, of the insides of surrounding rocks or foundations in roadways, tunnels, underground chambers and foundation engineering, and monitoring the stability. The displacement meter mainly comprises measuring cylinders, orifice devices, a fixer, a base point anchor head and a measuring connecting line. The measuring method sends the displacement meter into a measuring drilling hole according to different depths measured; when the surrounding rocks with different depths on the circumference of the underground engineering move, the measuring cylinders on the outside of orifices automatically mark out the displacementdistance of anchor points with different depths; when the base point anchor head and the orifice distance are varied, the measuring connecting line draws a cursor slider and compresses a spring, and the displacement variation length can be clearly read out through the scales displayed on the outer surfaces of the measuring cylinders; and the reading of various measuring cylinders after deformationare read and recorded, and the displacement of terranes of different measuring points can be obtained by deducting the reading with respective initial reading. The device is simple, has reliable overall structure and strong engineering adaptability, and is accurate to measure and convenient to assemble and measure.

Description

technical field [0001] The invention relates to a rotary disc type deep base point displacement meter and a measuring method, and is especially suitable for measuring the axial displacement of the surrounding rock or the interior of the foundation along the drilling hole and monitoring the stability of the shafts, tunnels, chambers and foundation engineering. Background technique [0002] Due to its simple structure, the displacement meter is widely used in underground engineering. It is mostly used in underground engineering such as mines, tunnel traffic, and large-span chambers. It is used to monitor the deformation of roadways and chambers, and provides reliable information for safe production and support design. parameter. At present, the measurement of the displacement of the surrounding rock around the underground project adopts the drilling measurement technology, that is, a measurement borehole is constructed on the surrounding rock to be measured, and the base point...

AI Technical Summary

Problems solved by technology

Depending on the connection mode or measurement principle of the base point and the measuring instrument, it is divided into mechanical connection, electromagnetic induction and resistance strain; the mechanical connection measurement method is divided into direct reading and indirect reading, and the electromagnetic induction and resistance strain measurement are both The indirect reading type, mechanically connected multi-point displacement gauge uses connectors to connect the anchor heads of each base point with the orifice measuring device. Corrosion, the steel structure is affected by temperature, humidity, etc. and the measurement accuracy is low; the orifice measurement device is an electromechanical dial indicator. The disadvantages are that the displacement measurement range is small, the usability is poor, and the measurement accuracy is restricted by the measurement direction.

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