Prediction method of life of underwater earthworker's fabrics

A prediction method and technology of geotextiles, applied in measurement devices, measurement of color/spectral characteristics, material analysis by optical means, etc., can solve the problems of high testing cost, large subjective arbitrariness, time-consuming and labor-intensive, etc., to maintain integrity , Reduce the cost of life prediction, and the effect of simple and accurate prediction methods

Inactive Publication Date: 2008-08-13
SHANGHAI NEW TECHTEXTILES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This test method is time-consuming and labor-intensive, and the test cost is high. The obtained data is subjective and random, and cannot fully and accurately reflect the life of underwater polypropylene geotextiles.

Method used

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  • Prediction method of life of underwater earthworker's fabrics
  • Prediction method of life of underwater earthworker's fabrics
  • Prediction method of life of underwater earthworker's fabrics

Examples

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Embodiment Construction

[0025] In the following, the experiments of polypropylene woven geotextile and polypropylene polyester fiber composite geotextile in Jiaotong University swimming pool and Yangtze River Hengsha wharf are taken as examples to further illustrate the present invention.

[0026] In the experiment, the SUR-1 ultraviolet radiation measuring instrument was used to measure the ultraviolet radiation energy in the exposure field. After the sunlight passes through the quartz glass protection window of the measuring instrument, it reaches the ultraviolet filter, and only the ultraviolet light in the 280-400nm band can pass through the filter, and the light in other bands (including: visible light, infrared light and far infrared light) are effectively blocked. The ultraviolet light passing through the filter is measured by semiconductor ultraviolet photodetector, and the optical signal is converted into an electrical signal. After the output instrument is measured and calibrated, the volta...

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Abstract

A method for predicting lifetime of geotextile under water utilizes rule that fabric breaking strength is attenuated in following increase of ultraviolet radiation and utilizes attenuation rule of ultraviolet radiation under water to test lifetime of geo-textile under water. In the method, sample cutting off from geo-textile under water is not required so completeness of engineering can be kept and prediction cost of engineering lifetime can be lowered.

Description

technical field [0001] The invention relates to a method for predicting the service life of a geotextile. In particular, it relates to a prediction method for underwater geotextile life. Background technique [0002] Geosynthetics are widely used in construction, transportation, water conservancy, etc., and most of their raw materials are polymer materials. Affected by sunlight, temperature, water vapor and other factors in the atmospheric environment, as the use time increases, geosynthetics will degrade, which is reflected in the macroscopic aspect, manifested as the decay of physical and mechanical properties, such as the decrease in strength, thus losing Or partially lose its function, this process is called aging of geosynthetics. Before the 1980s, most geotechnical materials only played a small role in engineering, for example, as a temporary reinforcement layer, an isolation layer of soil and concrete in the foundation, etc., before the natural reinforcement of vege...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33G01N21/84G01N17/00
Inventor 薛育龙包伟国杨旭东徐建平
Owner SHANGHAI NEW TECHTEXTILES
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