Recyclable coarse fracture high velocity seepage testing apparatus

Abstract

The invention discloses a recyclable coarse fracture high velocity seepage testing apparatus which comprises a water tank, a water supply pipe, a water inlet end cap, a fracture test piece, a water outlet end cap and a return pipe which are sequentially connected and a water pressure sensor; the water supply pipe is sequentially provided with a booster pump and a pressure regulating valve, both the water inlet end cap and the water outlet end cap are provided with horizontal seams for water diversion; the fracture test piece comprises a test piece main body and a fracture main body located in the test piece main body, the fracture main body comprises a fracture, smooth flat grooves and rubber gaskets, the smooth flat grooves are distributed at two sides of the fracture along the axial direction of the fracture, the rubber gaskets are used for filling the smooth flat grooves to seal the two sides of the fracture, the two ends of axial length of the fracture are connected with the horizontal seams, and the fracture aperture is regulated through changing rubber gaskets of different thicknesses; the water pressure sensor extends into the fracture through a probe for measuring flowing water pressure of the fracture, the process of coarse rock mass fracture high velocity seepage is accurately, conveniently and truly reflected, the working procedures are simple and clear, the water volume calculation is simple, used water is recyclable, and the fracture aperture is controllable.

Description

technical field [0001] The invention relates to a seepage test device, in particular to a high-speed seepage test device for circular rough cracks, which belongs to the technical field of civil engineering. Background technique [0002] Southwest my country is rich in hydropower resources. There are many mountains and valleys in the region, and the karst landforms are widely distributed. Fissures are relatively developed in deep rock masses. During the construction process, high-pressure hidden water inrush accidents have occurred many times. How to solve the problem of water inrush disasters encountered in the construction of large-scale hydropower tunnel projects in deep fractured rock formations containing high-pressure concealed water bodies in karst areas has become an urgent problem in the field of hydropower and geotechnical engineering in my country. [0003] The natural fracture structure and seepage behavior of rock mass are extremely complex, and the seepage mecha...

AI Technical Summary

Problems solved by technology

[0004] At present, the research on rock mass fissure seepage is divided into theoretical research, laboratory test and numerical test research. Due to the complex high-speed non-Darcy seepage characteristics of rock mass, there are few researches, especially experimental research.

The main reason for the analysis is that the test conditions are relatively harsh. Previous high-speed non-Darcy seepage studies were mainly completed on high-pressure triaxial seepage testers and other imported test instruments, which can obtain better test results; however, high-pressure triaxial seepage tests The instrument test is mainly to analyze the influence of stress and strain on the fracture seepage characteristics, it is difficult to control the change of the fracture opening, so it is impossible to carry out the influence of the fracture opening on the seepage characteristics, and because the traditional high-pressure triaxial seepage tester has relatively strict requirements on the size and specifications of the specimen High, difficult to process, short infiltration diameter, large limitations

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