岩土力学Issue(10)：2831-2837,7.
土工织物与吹填土界面作用特性试验研究
Experimental studies of interface characteristics between geotextile and hydraulic fill soil
摘要
Abstract
Interface strength parameters are the key technical indices of the design and stability analysis of reinforcement. The pullout test is widely used for its better simulating of the field reinforced behavior. Through pullout test and direct shear test, the research focuses on the law and mechanism of the pullout (shear) rate’s influence on reinforcement interface characteristics and hydraulic fill sand, and the reinforcement effect of different fillers and different geosynthetics are discussed. The results show that: with the increase of pullout (shear) rate, the shear strength of sand-geotextile-sand interface decreases greatly while clay-geotextile-sand and sand-sand interfaces change little. From the perspective of strength index, sand-geotextile shear strength decreases mainly caused by the decrease of cohesive force;clay-geotextile shear strength increases mainly caused by the increase of friction angle;shear rate has little influence on hydraulic fill sand. Friction angle of reinforced soil is less than that of the soil itself. The interface characteristics of reinforcement are influenced by both pullout rate and normal stress level, related with type of geosynthetics and characteristics of soil. The choice of friction parameter for design and evaluation of reinforced structure should accord to the size of cohesive force.关键词
拉拔(直剪)试验/速率/土工织物/吹填土/界面特性Key words
pullout (direct shear) test/rate/geotextile/hydraulic fill soil/interface characteristics分类
建筑与水利引用本文复制引用
黄文彬,陈晓平..土工织物与吹填土界面作用特性试验研究[J].岩土力学,2014,(10):2831-2837,7.基金项目
国家自然科学基金项目(No.41472279)；广东水利科技创新项目(No.2011-04)。 （No.41472279）
