Device for testing permeable rate of geotextile

Abstract

The invention discloses a device for testing the permeable rate of a geotextile, and belongs to the technical field of permeability test of porous materials. The device comprises a tensionmeter and a permeameter, wherein the tensionmeter comprises a rectangular fixed frame, a tension sensor, a tension applying knob and a clamp for clamping the geotextile; the permeameter comprises a permeameter part I and a permeameter part II; the permeameter part I is an organic glass round tube with two open ends; the permeameter part II comprises a first vertical tube, a second vertical tube and a horizontal tube; a valve is arranged in the middle of the horizontal tube; the lower end of the first vertical tube is hermetically connected with the left end of the horizontal tube; the right end of the horizontal tube is hermetically connected with the lower end of the second vertical tube; the lower end of the permeameter part I is fixed with the upper end of the first vertical tube by a flange; and the center of the fixed frame is superposed with that of a flange interface. The device is simple in structure and low in cost, and can test the permeable rate of a machine woven geotextile under the condition of applying certain tension to the machine woven geotextile, so that the test result is more real and reliable and errors in actual application are reduced.

Description

technical field [0001] The invention relates to the technical field of testing the permeability of porous materials. Background technique [0002] Geotextile, sometimes referred to as geotextile, is a kind of permeable geosynthetic material, which mainly has the functions of reverse filtration, drainage, reinforcement, protection, isolation and wrapping in engineering, and is widely used in engineering. Among them, the woven geotextile is composed of two groups of parallel filaments or yarns interwoven in a certain way. The two groups of filaments are perpendicular to each other. The ones along the machine direction are called warp yarns, and the ones crossing the machine direction are called weft yarns. for tight. [0003] The permeability characteristics of geotextiles are extremely important, especially in reverse filtration and drainage engineering applications. Its permeability is generally characterized by permeability coefficient or water permeability. When testing...

AI Technical Summary

Problems solved by technology

In actual engineering, geotextiles are often subjected to tangential tension. Studies have shown that the pore size of the fabric will change significantly under tension, so that the actual permeability characteristics of geotextiles must be very different from the initial value. Therefore, the current method The measured permeability ch

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