Multifunctional automatic flexible wall permeability tester and testing method thereof

Abstract

The invention discloses a multifunctional automatic flexible wall permeability tester and a testing method thereof. A single-chip microcomputer control system for controlling a hydraulic device to work and a data acquisition system for acquiring data are arranged in a console; a cylindrical cavity, an upper cover and a base are connected through a sealing fixing piece; an exhaust port is formed inthe upper cover; the base is provided with an inlet channel used for being communicated with a penetrating fluid inlet, an outlet channel used for being communicated with a penetrating fluid outlet and a confining pressure channel for being communicated with a confining pressure applying opening. A sample table, a permeable stone, filter paper, a sample and a hollow sample upper seat are sequentially arranged on the base in the cylindrical cavity from bottom to top, the inlet channel extends to the middle of the base from a penetrating fluid inlet and vertically and upwards penetrates throughthe sample base, and the top end is communicated with an outlet channel of the penetrating fluid outlet through a pipeline; a first hydraulic outlet and a second hydraulic outlet are connected with apenetrating fluid storage device water inlet and a confining pressure applying opening respectively, and a penetrating fluid storage device penetrating fluid outlet is connected with the penetratingfluid inlet. The tester is high in operation automation degree, high in permeation efficiency and capable of simulating acid-base permeation conditions.

Description

technical field [0001] The invention relates to a permeation tester, in particular to a multifunctional automatic flexible wall permeation tester and a test method thereof, belonging to the technical field of geotechnical material tests. Background technique [0002] In engineering construction, the permeability coefficient is an important index reflecting the permeability of geotechnical materials, and the permeability test is an important method to determine the permeability coefficient. Most of the permeability tests are tested by a permeability tester. [0003] At present, the main permeability test instruments at home and abroad include rigid wall permeameters and flexible wall permeameters, but rigid wall permeameters can test the permeability coefficient of soil with good permeability. The liquid is all water, the application scene is single, and the acid-base infiltration conditions cannot be simulated; during the test of the rigid wall permeameter, there is a water-...

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Problems solved by technology

[0003] At present, the main permeability test instruments at home and abroad include rigid wall permeameters and flexible wall permeameters. However, rigid wall permeameters can test the permeability coefficient of soil with good permeability. The liquid is all water, and the application scene is single, which cannot simulate the acid-base infiltration conditions; during the test of the rigid wall permeameter, there is a water-permeable channel between the sample and the side wall of the permeameter, which causes water leakage on the side wall of the permeameter, which is serious. Affect the test accuracy; while the flexible wall permeameter can well avoid side leakage on the side of the sample during the test, and the flexible wall permeameter has a wide testing range, not only can test the permeability coefficient of the sample with better permeability, At the same time, the permeability coefficient of samples with smaller permeability coefficients such as clay can be carried out, but the current flexible wall permeability tester can not simulate the acid-base penetration condition, and the scope of application to the treatment solution is limited; and the existing flexible wall permeability tester is designed relatively It is bulky, takes up a lot of space, the operation of the instrument is relatively primitive, the degree of automation is low, and the labor intensity is high, the workload of the tester is heavy, the penetration efficiency is low, the penetration pressure is low, the applicable group is single, and it cannot meet the needs of various types of workers

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