Novel geotextile clogging experiment instrument

Abstract

The invention relates to the technical field of geotextile material detection instruments and discloses a novel geotextile clogging experiment instrument. The novel clogging experiment instrument comprises a clogging barrel body, a water head control device, a pressure measuring device, a vacuum pumping saturation system and a pressurized rinsing device, wherein the clogging barrel body comprisesa top cover, an upper barrel, a middle barrel, a lower barrel and a base, filter paper or a filter net is arranged between the upper barrel and the middle barrel, geotextile is arranged between the middle barrel and the lower barrel, a water inlet and an exhaust port are formed in the top cover, a drainage port is formed in the base, the upper barrel is connected with the vacuum pumping saturationsystem, a plurality of radial pressure measuring holes are formed in the middle barrel and the lower barrel on two sides of the geotextile and are connected with the pressure measuring device, and the lower barrel is connected with the pressurized rinsing device. The novel geotextile clogging experiment instrument can perform vacuum pumping saturation, accurately judge whether the geotextile is clogged and the clogging degree, rinse the clogged geotextile and detect the geotextile after rinsing and has a good effect.

Description

technical field [0001] The invention relates to the technical field of geotextile material testing instruments, in particular to a novel geotextile clogging tester, which is mainly used for testing the seepage clogging characteristics and clogging flushing effect of geotextiles. Background technique [0002] Geotextile is a new type of geotechnical material made of polymer synthetic materials. It has good water permeability and small pores, which can meet the requirements of engineering for filter materials. As a result, the filter performance of geosynthetics has been more and more widely used in flood control and disaster reduction, land reclamation, long-distance water transfer across river basins, environmental protection and urban construction. In order to ensure that the water can be discharged smoothly through the geotextile, and the protected soil particles will not be lost, the design of the geotextile filter often needs to meet the three criteria of soil conservati...

AI Technical Summary

Problems solved by technology

Insufficient soil saturation will directly affect the effect of seepage and silting

[0005] (2) The existing clogging test instrument adopts the gradient ratio evaluation standard, which also has deficiencies

However, the existing clogging test instrument can only measure the permeability coefficient of the whole system composed of the geotextile and the soil sample within the range of 25 mm above it, but cannot measure the permeability coefficient of the geotextile or the soil sample within the range of 25 mm above it alone, so that it cannot Good judgment of where silting occurs can lead to misjudgment of silting caused by the soil layer itself as silting caused by the geotextile

[0006] (3) The existing experimental device can only carry out a one-way experiment from the beginning without clogging to clogging, and cannot carry out a reverse experiment from clogging to non-clogging after washing the geotextile, that is, it is impossible to detect the flushing effect

[0007] This patent is to solve the three technical defects of the existing geotextile silting experiment device: (1) vacuum pumping and saturation cannot be performed, and the air in the soil sample-geotextile system is difficult to fully discharge, which will seriously affect the experimental results; ( 2) It is impossible to accurately judge whether the geotextile is clogged and the degree of clogging; (3) It is impossible to flush the clogged geotextile and detect it after flushing

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