Research and improvement of test method for mechanical properties of impervious geomembrane
REN Zedong
AN Fengjie
Abstract：Geomembrane is often used as anti-seepage structure of reservoir basin due to its high anti-seepage performance and large differential settlement.The pull-out mechanical properties between geomembrane and its upper and lower cushion mate-rials are the key factors affecting the success or failure of seepage control.This article introduced the traditional geomembrane pull-out test equipment and principle,and explained the error problems in the calculation formula.Improved the geomembrane pull-out test system,and compared and analyzed the test results before and after the improvement.The results showed that the nominal tensile friction strength of the geotextile obtained by the traditional method was lower than the true tensile friction strength obtained by the improved method.Then the formula for calculating the tensile friction strength was revised from theoreti-cal perspective.The revised formula for calculating the tensile friction strength of geomembrane can obtain the real tensile friction strength of geomembrane under tensile action without changing the traditional testing method.
Keywords：reservoir seepage controlgeomembranepull-out mechanical propertiestest method
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 9-12 )