Simple automatic double-ring field infiltration tester and method

Abstract

The invention belongs to the technical field of coal mining, and relates to an infiltration tester, in particular to a simple automatic double-ring field infiltration tester. The infiltration tester comprises an inner ring and an outer ring, wherein the inner ring is inserted into the earth's surface to form an inner container which is connected with an inner ring water supply tank and an inner ring water drain tank, and an automatic water level measuring instrument is arranged in the inner ring water supply tank; the outer ring is inserted into the earth's surface to form an outer annular container arranged on the outer side of the inner container in a sleeving manner, and the outer annular container is connected with an outer ring water supply tank and an outer ring water drain tank; theinner ring water supply tank and the inner ring water drain tank are communicated; the outer ring water supply tank and the outer ring water drain tank are communicated. By means of the infiltrationtester and a method, the double-ring infiltration tester, the inner ring water supply and drain devices, the outer ring water supply and drain devices, the automatic water level measuring instrument and the like are combined into a complete system, and the problems of large test errors due to artificial handling of water addition and reading in a testing process as well as higher cost of Mariotte's bottles are solved.

Description

technical field [0001] The invention relates to an infiltration tester, which belongs to the technical field of coal mining, in particular to a field simple automatic double-loop infiltration tester. Background technique [0002] Double rings of a certain height and diameter (generally two iron rings of different diameters, respectively called the inner ring and the outer ring) are evenly driven into several depths below the surface, and water is injected into the inner and outer rings while maintaining the inner and outer rings. The water head is equal and constant. When the infiltration rate of water remains basically constant, the vertical permeability coefficient of the tested porous medium can be calculated according to Darcy's law. Because the water supply of the traditional double-ring infiltration measuring instrument needs the Martens bottle to maintain a constant water head during the infiltration process, the cost is high and the operation is inconvenient, especia...

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Problems solved by technology

The infiltration instrument and method combine a double-ring infiltration tester, an inner ring water supply and drainage device, an outer ring water supply and drainage device, and an automatic water level tester into a complete system, which solves the problem of manual completion of water addition and reading during the test. The problem of large error and high cost of Martens bottle

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