A Test of Equivalent Pore Size of Geosynthetics under Tensile Conditions

Abstract

The invention relates to a testing device for the equivalent aperture of geotechnical synthetic materials under tensile conditions, which is used for measuring the equivalent aperture of geotextiles under pressure. A through hole is arranged inside the sieve seat, and the middle part of the through hole extends inwards to an annular platform, and the annular platform fixes a screen; the screen has mesh holes, and the screen has elasticity and can be stretched; the geotextile is fixed on the screen; On the geotextile, a storage space is set inside the sieve cylinder for containing experimental particles; the pressure applying component is connected with the sieve cylinder to apply a vertical downward load to the sieve cylinder; the swing component is connected with the sieve base to make the sieve base move circular motion. The test device can accurately calculate the equivalent pore diameter of the geotextile under pressure, and can more accurately reflect the filtration performance of the geotextile.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a device for testing the equivalent aperture of geosynthetics under tensile conditions. Background technique [0002] Pore ​​size is an important index in the hydraulic properties of geotextiles. It reflects the filtration performance of geotextiles. It can not only evaluate the ability of geotextiles to prevent the passage of soil particles, but also reflect the water permeability of geotextiles. It is an index that characterizes the pore size characteristics of geotextiles. is the effective aperture. At present, there are mainly dry sieving method and wet sieving method to measure the effective pore size. Among them, the dry sieving method is the most commonly used test method. The test principle is: use the geotextile sample as the sieve cloth, put the standard granular material Vibrate the sieve on the top of the geotextile, weigh the quality of the standar...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a device for testing the equivalent aperture of geosynthetics under tensile conditions, which solves or partially solves the technical problem that the vibrating screen test device in the prior art can only measure the equivalent aperture of the geotextile in a natural state. Realized the simulation of the stress condition of the geotextile in the actual engineering application, and the accurate calculation of the equivalent pore size of the geotextile under pressure, which can more accurately reflect the technical effect of the filtration performance of the geotextile

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