土工格栅加筋碎石土的强度和变形特性

The effects of feinforcement on strength and deformation of soil-gravel material

本文作者采用高压大型三轴仪对风化程度不同的两种碎石土进行了加筋与不加筋固结排水三轴试验研究 ,并引入了等效围压、加筋效果系数等概念 ,对碎石土加筋效果、加筋机理、试验围压、土料性质等因素进行了较全面的分析研究 ,结果表明 :加筋能明显提高碎石土的强度和破坏应变 ,对土的破坏有延滞作用 ;在同一破坏应力水平下加筋碎石土试样的轴应变与侧应变都明显减小 ;碎石土的加筋效果随围压的增加减弱 ,加筋效果也与碎石颗粒的风化程度、软硬等因素有关 ;

The effects of reinforcement on strength and deformation of soil\|gravel material are experimentally studied by using high\|pressure large scale triaxial testing facility.The result shows that the strength and failure strain of the material are greatly elevated and the deformation is reduced due to the effect of reinforcement.The effect of reinforcement decreases as the surrounding pressure increased and is dependent on the weathering as well as the stiffness of the gravel.The mechanism of the reinforcement effect can be explained by adopting the concept of effective surrounding pressure.