Rational Design of Geomembrane Surface Texture for Infrastructure Applications

9800291 Dove《基础设施应用土工膜表面纹理的合理设计》土工膜是一种人造材料，在民用基础设施开发和修复中无处不在。它们是薄的聚合物薄片，用于构建相对不透水的流体流动屏障。结合土工膜的设计通常包括创建由土工织物（聚合物织物）交替层组成的复合材料，以及从砾石到粘土大小的土壤。为了提高界面抗剪切能力，土工膜被制造成具有广泛的粗糙度和表面纹理图案。表面织构与界面抗剪强度之间的关系尚不清楚，对于何种形式的表面织构在特定应用中提供最佳性能，在专业领域存在相当大的争论。这项研究是一项GOALI奖，大学与工业合作研究旨在开发一种设计用于民用基础设施应用的最佳土工膜表面纹理的方法。研究将包括实验表面分析，使用颗粒土的界面剪切测试，以及一系列原型和生产土工膜的力学性能测试。实验结果将用于量化最佳纹理特征和特定最终用途设计的方法。在不牺牲机械性能的情况下，为特定应用和特定材料组合设计土工膜表面的方法的发展是对基础设施建设和修复的重要贡献。＊＊＊

9800291 Dove "Rational Design of Geomembrane Surface Texture for Infrastructure Applications" Geomembranes are manufactured materials that are ubiquitous in civil infrastructure development and rehabilitation. They are thin sheets of polymer used to construct relatively impervious barriers to fluid flow. Designs that incorporate geomembranes typically involve creation of a composite material composed of alternating layers of geotextiles (polymer fabrics), and soils ranging in size from gravel to clay. To achieve improved interface shear resistance, geomembranes are manufactured with a vast range of roughness and surface texture patterns. The relationship between surface texture and interfacial shear strength is not well understood and there is considerable debate in the professional community regarding what form of surface texturing provides the best performance for specific applications. This research is a GOALI award, with the collaborative university-industry research aimed at developing a method to design optimal geomembrane surface textures for use in civil infrastructure applications. The research will involve experimental surface analysis, interface shear testing using granular soils, and mechanical property testing of a range of prototype and production geomembranes. The experimental results will be used to quantify optimal texture characteristics and methods for specific end-use design. Development of methodologies for design of geomembrane surfaces for specific applications and for specific material combinations without sacrificing mechanical performance is an important contribution to infrastructure construction and rehabilitation. ***