Variable water head permeability coefficient measurement system and measurement method

Abstract

The invention discloses a variable water head permeability coefficient measurement system and measurement method, relates to the technical field of rock seepage experiments, solves the technical problem of long permeation experiment time consumption, and eliminates the influence of temperature and pressure changes on the permeability coefficient measurement; the system comprises a liquid storage system, a test system, a control system and a data processing system; the liquid storage system comprises a water storage barrel, a sealing cover and an adapter box, wherein a water injection port andan air inlet are formed in the sealing cover; the test system comprises a test bed, a water guide pipe and a test cylinder; the water guide pipe is connected with the test cylinder; the control systemcomprises an automatic control valve, a heating rod, an air inlet pipe, a high-pressure air tank and a pressure reducing valve; the automatic control valve is connected with the adapter box; the high-pressure air tank is communicated with the air inlet; and the data processing system comprises a signal acquisition instrument and a computer, and a method for determining the permeability coefficient through an instantaneous Darcy law and the system. The system and the method have the beneficial effects that the automation degree is high, the test period is shortened, the measurement accuracy isimproved, and the like.

Description

technical field [0001] The invention relates to the technical field of rock seepage experiments, in particular to a test device for measuring the permeability coefficient of variable water head and a method for measuring the permeability coefficient by using the device. Background technique [0002] Similar material simulation experiment is an important technical means of geotechnical engineering research. In the laboratory, a model similar to the actual engineering is made according to the similarity principle, and the mechanical parameters and stress distribution of the model are observed with the help of test instruments, and the results of the research on the model are used to infer The mechanical phenomena that may occur in the prototype, as well as the law of rock mass stress distribution, so as to solve the practical problems in the production of geotechnical engineering. Similarly, in the process of mine geological research, it is also an important research method to...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the permeability experiment takes a long time and the experiment is affected by temperature and pressure changes, the accuracy of the permeability coefficient measurement is not high. The present invention provides a variable head permeability coefficient measurement system and measurement method. The specific technical scheme is as follows

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