Rock creep triaxial test system and method capable of continuously acting in water environment

Abstract

The invention discloses a rock creep triaxial test system and method capable of continuously acting in a water environment, and belongs to the technical field of rock mechanics tests. According to thetechnical scheme, a pressurizing cylinder is connected with a cross beam, the cross beam is supported on a testing machine base through a supporting column, a water environment confining pressure system is arranged between the base and the cross beam, a dynamic stress-strain collecting system is connected with the water environment confining pressure system, and the dynamic stress-strain collecting system is sequentially connected with a computer, a digital controller, a servo controller, a hydraulic source and an oil conveying pipe. The rock creep triaxial test system and method have the beneficial effects that the hydration reaction of an expanding agent is used for replacing a constant-flow pump to provide confining pressure for a triaxial test, the cost is reduced, and the rock creeptriaxial test system and method are continuous and stable; the long-term mechanical property of the rock can be tested under the continuous action of chemical solutions with different components; thelong-term mechanical properties of the rock in static and flowing water environments can be tested, the pH value change of the water environment caused by corrosion of water to the rock can be monitored in real time, and the hydrochemical reaction characteristics of the rock are obtained; and moreover, the mixed expanding agent is good in expanding effect.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics tests, and in particular relates to a triaxial test method and device for rocks under the continuous action of different water environments, which are suitable for reproducing the long-term stability of rocks and the full range of creep damage and destruction under different solution environmental conditions in dynamic / static water. process. Background technique [0002] At present, in the triaxial tests on the influence of water on the mechanical properties of rock, almost all of them study the weakening effect of strength and elastic modulus under different water content or saturated state from the perspective of water content or water content state. However, the moisture content involved in these experiments is mostly a static quantity. However, we believe that in rock engineering, due to the change of water level in the rock body, water content is a dynamic variable related to time and...

AI Technical Summary

Problems solved by technology

However, we believe that in rock engineering, due to the change of water level in the rock body, water content is a dynamic variable related to time and space. Even if the rock mass in the saturated state is in the water environment for a long time, its long-term mechanical properties will change , resulting in a significant difference between the long-term strength and its basic compressive strength

In addition, constant flow pumps are generally used to provide confining pressure in triaxial tests, but in long-term rock stability and creep damage tests, confining pressure needs to be provided for a long time, and the requirements for constant flow pumps are very high. easily damaged

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