Geotechnical composite drainage material filter membrane horizontal seepage clogging discounting test device and test method thereof

Abstract

The invention relates to a geotechnical composite drainage material filter membrane horizontal seepage clogging discounting test method. The method comprises the following processes: filter membrane sample manufacturing comprises taking out geotechnical composite drainage material non-disturbance sample in clogging from a soil layer, and manufacturing a sample containing deposited clay on the surface layer of the filter membrane according to a specific sample preparation method, wherein the discounting of the geotechnical composite drainage material filter membrane horizontal seepage coefficient caused by sedimentation clogging after being used in the soil layer can be really simulated through the sample preparation; and meanwhile, a set of horizontal seepage coefficient test device is researched, the device can be used for simulating and testing the horizontal seepage coefficient of the filter membrane in different hydraulic gradient and different lateral pressure coefficient conditions, the sample prepared by using the above method and the unused filter membrane sample are used for performing contrast test to obtain a filter membrane clogging discounting index. The invention firstly provides the method and corresponding device for quantitatively testing the geotechnical composite drainage material filter membrane horizontal seepage clogging discounting, the device is simple, the operation is simple and easy to implement, and the measurement precision is high; the device can be used for testing the geotechnical composite drainage material filter membrane horizontal seepage coefficient.

Description

technical field [0001] The invention belongs to the technical field of testing geotechnical synthetic materials and can be used for quantitative testing of filter membrane clogging reduction of geotechnical composite drainage materials. Background technique [0002] Geotechnical composite drainage material is a composite drainage material composed of core materials of different shapes made of thin geotextile wrapped with different materials. This material can usually drain water along the drainage channel of the core material in the horizontal direction. [0003] In recent years, with the development of geotechnical composite drainage materials, it has been widely used in soft soil foundation treatment, roadbed vertical and horizontal drainage, building underground drainage channels, dam drainage facilities and other fields. During the drainage process of geotechnical composite drainage materials, the water flow channeled by the outer filter membrane along the plane directio...

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Problems solved by technology

[0004] In order to solve the quantitative test problem of the silting reduction index of the geotechnical composite drainage material filter membrane, a kind of geotechnical composite drainage material filter membrane horizontal penetration silting reduction test device and its testing method are proposed

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