Dynamic-static coupling loading test system based on lever principle

Abstract

The invention discloses a dynamic-static coupling loading test system based on the lever principle. The dynamic-static coupling loading test system comprises a top beam, a ball end groove, a pressingrod, a stand column, a pressing head, two dynamic load sensors, a displacement sensor, a base, a cushion block, a dowel bar, a loading rod, an impact platform, a limiting clamp, a data acquisition system, a digital photographing system, an impact hammer and a computer. The system is small in load range and high in sensitivity; a static load can be stably applied and a dynamic load can be quantitatively applied; and under the condition that the physical and mechanical properties of the weakly cemented rock mass are not damaged, the weakly cemented rock mass is subjected to a dynamic and staticloading test, and the stress and deformation evolution law of the test sample under the coupling action of static force and disturbance stress can be recorded in real time, so that the engineering stability of the weakly cemented rock mass under complex stress conditions is effectively studied.

Description

technical field [0001] The invention relates to a test system, in particular to a dynamic-static coupled loading test system based on the principle of leverage, and belongs to the technical field of mechanical test equipment. Background technique [0002] At present, conventional uniaxial and triaxial tests can obtain the static properties of rock and soil mass, and can make a quantitative evaluation of the stability of engineering rock mass. Affected by dynamic disturbances such as far-field blasting, mechanical vibration, and near-field excavation, it is of great significance to study the mechanical properties of rock and soil under dynamic loads for objectively evaluating its engineering stability. For muddy weakly cemented rock mass, due to its low strength and poor structure, the uniaxial limit load is less than 2MPa, and a small dynamic disturbance will cause structural damage. to study its mechanical properties. [0003] Based on the above reasons, there is an urgen...

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Problems solved by technology

[0004] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a dynamic-static coupled loading test system based on the principle of leverage, which has a small measuring range and high sensitivity, and can stably apply static loads and quantitatively apply dynamic loads without damaging low-strength and weak Under the condition of the physical and mechanical properties of the cemented rock mass, a dynamic-static coupling loading test is performed on it, and the stress and deformation evolution law of the test sample under the coupled action of static force and disturbance stress can be recorded in real time, so as to effectively study the cemented rock mass under complex stress conditions. Engineering stability of weakly cemented rock mass

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