Rock high pressure infiltration experiment system

Abstract

The invention provides a rock high-pressure permeability test system, comprising a sample depression box device which is provided with a heavy frame inside, a hydraulic jack positioned inside the heavy frame, a movable trolley positioned on the top of the hydraulic jack, and a triaxial depression box fixed on the movable trolley, wherein, the triaxial depression box comprises a confining pressure chamber body, a depression box base with an seepage water inlet and a confining pressure water inlet, a lower actuating post system which is positioned on the depression box base and is communicated with the seepage water inlet and a seepage water channel on the sample, an upper actuating post system of the seepage water outlet which is positioned on the top of the depression box and is communicated with the seepage water channel on the sample. The test system is provided with an oil-water converting dynamic control system which is connected with the hydraulic jack, the seepage water inlet and the confining pressure water inlet respectively. The invention can test the permeability of the sample under various conditions, conventional triaxial mechanical characteristics of various loading paths, the seepage at a high permeability pressure, and the stress coupling process and can control the shaft pressure, the confining pressure, the permeability pressure and the axial displacement accurately.

Description

Technical field: [0001] The invention is related to the permeability test of rock (body), the mechanical property test of rock (body) under high osmotic pressure and the research on its failure mechanism. Background technique: [0002] In the construction of water conservancy, mining, petroleum, railway, highway and national defense, various rock seepage problems are often encountered. In the construction of large-scale hydropower stations with 300m high dams in the western region, as well as the construction of deep-buried long tunnels for highways and railways, a major geological disaster problem is the "high-pressure water inrush" problem of abnormal groundwater flow. The evaluation and prediction of such problems require us to understand the permeability characteristics, failure mechanism and mechanical properties of rock mass under the action of high hydraulic head pressure, but at present, people have little knowledge and experience in this area. [0003] To complete ...

AI Technical Summary

Problems solved by technology

This method is to test the permeability of the sample according to the relationship between the balance of water pressure and time, which ignores the compressibility of the fluid in the sample and the pore compressibility of the rock, the deformation of the pipeline and the leakage of the pipeline, and the pressure difference The accuracy of the sensor is relatively low, and the long test duration will inevitably affect the test results

The water pressure at the seepage outlet is a variable, which is inconsistent with the actual pore water pressure on the sample

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