Rock Brazilian test fixture device capable of accurately controlling a layered rock splitting direction

Abstract

The invention relates to an indoor rock mechanics test device, in particular to a rock Brazilian test fixture device capable of accurately controlling a layered rock splitting direction, and belongs to the technical field of geotechnical engineering. The device is composed of an upper pressing plate, a lower pressing plate, a filler strip, a baffle, a protractor, a clamping panel and a telescopicscrew. According to the rock Brazilian test fixture device capable of accurately controlling the layered rock splitting direction, the problems that in a traditional Brazilian splitting fixture device, sample centering is difficult, bedding inclination angle control is inaccurate, and splitting crack angle measurement is inconvenient are solved; the rock Brazilian test fixture device is capable ofaccurately applying the linear load to the sample, conveniently controlling the bedding inclination angle, measuring the stratified rock splitting angle, ensuring the reliability of the result and accurately controlling the stratified rock splitting direction is simple in structure, safe to operate and high in practicability, and can be universally used for assembling and testing the stratified rock Brazilian split sample.

Description

technical field [0001] The invention relates to an indoor rock mechanics test device, in particular to a rock Brazil test fixture device for precisely controlling the splitting direction of layered rock, belonging to the technical field of geotechnical engineering. Background technique [0002] Tunnels, roadways and other projects all rely on the study of the mechanical properties of rock and soil. Because the tensile strength of rock is much smaller than the compressive strength, geotechnical accidents caused by tensile failure occur frequently. Therefore, the tensile strength of rock is an important parameter in the study of rock and soil mechanical properties. The direct tensile test is relatively difficult to complete in operation, and the Brazilian split test is usually used internationally to test the tensile strength of rocks. The Brazilian splitting test sample is easy to process and easy to operate, and it is currently the most commonly used test method for determ...

AI Technical Summary

Problems solved by technology

A few scholars have carried out the Brazilian splitting test of layered rocks. However, tools such as protractors are used to adjust the layer angle. The position of the protractor changes each time, and the protractor does not belong to the fixture structure. On the sample, there is a distance between the protractor and the sample, resulting in inaccurate layer placement angles

[0005] To sum up, the current Brazilian splitting fixture still has human intervention in the centering. Due to inaccurate visual inspection and centering errors, the line load through the center of the sample cannot be accurately applied, and it cannot perfectly meet the requirements of the Brazilian splitting test at the same time. Two Technical Requirements

At the same time, when using a protractor that does not belong to the fixture structure, there is a problem of inaccurate layer placement angles

The current fixture has weak adaptability, large error, poor operability, inaccurate measurement of rock bedding angle, inconvenient measurement of cracks, difficult to observe, no protection device and other defects

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