Rational Design of Geomembrane Surface Texture for Infrastructure Applications

9800291 DOVE《用于基础设施应用的土工膜表面纹理的合理设计》土工膜是在民用基础设施开发和修复中普遍存在的人造材料。它们是用来建造相对不透水的流体流动屏障的聚合物薄片。结合土工膜的设计通常涉及创造一种由交替的土工织物(聚合物织物)层和从砾石到粘土大小不等的土壤组成的复合材料。为了提高界面抗剪切性，土工膜的制造具有广泛的粗糙度和表面纹理图案。表面纹理和界面剪切强度之间的关系还不是很清楚，对于哪种形式的表面纹理在特定的应用中提供了最好的性能，在专业团体中存在着相当大的争论。这项研究是一个目标奖，大学和行业的合作研究旨在开发一种方法，设计用于民用基础设施应用的最佳土工膜表面纹理。这项研究将包括实验表面分析，使用颗粒土壤的界面剪切测试，以及一系列原型和生产土工膜的机械性能测试。实验结果将用于量化特定最终用途设计的最佳纹理特征和方法。开发针对特定应用和特定材料组合的土工膜表面设计方法，而不牺牲机械性能，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. ***