苯板与土工膜的摩擦特性试验研究

Experimental Study on Friction Characteristics between Polystyrene Board and Geomembrane

通过两种试验方法测定苯板与土工膜的摩擦角,结果表明,采用土工合成材料综合测定仪时,随着膜的粗糙程度增大,粘聚力增大,摩擦角减小,且苯板产生了变形,故结果存在一定误差;采用非散粒体材料摩擦角测定仪时,可得到苯板与光面土工膜的稳定摩擦角,且该仪器构造简单,便于操作,但不能得到苯板与一布一膜、两布一膜之间的稳定摩擦角,仍需进一步改进。

Two methods are used to test the friction angle between geomembrane and polystyrene board. The results show that： （a） with the increasing of surface asperity of geomembrane, the friction angle between geo-membrane and polystyrene board is reduced and the cohesive force is increased when using Comprehensive Geotechnical Synthetic Materials Determination, and at meantime, the polystyrene board generates deformation; and （b） there are good regularity with the friction angle between smooth geomembrane and polystyrene board when using Non-granular Mixtures Friction Angle Determination, but there are not good regularity with the friction angle between composite geomembrane and polystyrene beard. The Non-granular Mixtures Friction Angle Determination is simple and easy to operate, but should be further improved.