Liquid application device and method for liquid-filling jointed rock mass sample for flange type SHPB(split Hopkinson pressure bar)

Abstract

The invention provides a liquid application device for a liquid-filling jointed rock mass sample for a flange type SHPB(split Hopkinson pressure bar). The device comprises a pressure-bearing cavity device body and a liquid application device body; the pressure-bearing cavity device body comprises a metal cavity shell of an integrally-formed structure; the two sides of the metal cavity shell are provided with holes used for placing a sample; metal flange plates are fixedly connected to the two sides of the metal cavity shell separately; the positions, making contact with the sample, of the inner sides of the metal flange plates are provided with annular grooves; first sealing parts which sleeve the sample are arranged in the annular grooves; an observation window is arranged on the side wall of the metal cavity shell; and a high-speed video camera is arranged at the observation window. The invention further provides a liquid application method for the liquid-filling jointed rock mass sample for the flange-type SHPB(split Hopkinson pressure bar). According to the liquid application device and method for the liquid-filling jointed rock mass sample for the flange type SHPB(split Hopkinson pressure bar), the type of filling liquid is diversified, in addition, the device is convenient to assemble and disassemble, the liquid inside the device can be prevented from leaking out, the dynamic change process of the sample and the liquid can be observed, and test tasks related to the rock dynamics can be well completed.

Description

technical field [0001] The invention relates to the technical field of rock dynamics tests, in particular to a flange-type SHPB liquid-filled jointed rock sample liquid application device and an application method thereof. Background technique [0002] In underground engineering or water conservancy engineering, dynamic loads such as earthquakes or blasting will cause the generation and propagation of stress waves, which will affect the engineering. Joints are common in natural rock mass, and most of them are filling joints, and the filling materials can be gravel, clay, water, oil and other substances. The research on the propagation law of stress wave in filling joints is of great significance to the safety prediction and evaluation of rock mass engineering. At present, the research on solid or the mixture of solid and liquid as filling materials is relatively sufficient, but there are few explorations involving liquid filling materials. [0003] Therefore, it is particu...

AI Technical Summary

Problems solved by technology

However, due to the poor sealing effect of the joint between the two parts of the metal casing and the contact between the sample and the metal casing, liquid leakage is prone to occur during the pressure test, which affects the rock dynamics test results.

In addition, since the sample device is a closed system, it is impossible to observe the dynamic change process of the sample and the liquid under the impact load.

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