中南大学学报（自然科学版）2016，Vol.47Issue(5)：1682-1688,7.DOI:10.11817/j.issn.1672-7207.2016.05.030
接触面粗糙度对红黏土-混凝土接触面力学性质的影响
Influence of interface roughness on mechanical properties of red clay-concrete interface
摘要
Abstract
Concrete blocksurfacewith different roughnesswere made andthesurfacewasused asthe soil-concrete interface. Theinterfaceroughness was measured by sand filling method. The direct shear tests on the interface of red clay-block by using the large-direct shear apparatus were carried out.The influencesofinterfaceroughness on the parameters of shear strength, the relationships between shear stress andtangentialdisplacement and the behavior of shear dilatancy & shear shrinkage were studied by quantitative analysis of roughness. The results show that theinterface roughness has little influence on the angle of internal frictionofred clay-concreteinterface.Withtheinterfaceroughness approaching its marginal value, cohesion ofred clay-concreteinterface increases with theincreaseof roughness and its value is approachingthat of red clay. Theinterfaceroughness has a great influence on the relationships between shear stress andtangentialdisplacement. There is the zone above the interface, in the soil, in which the mechanical properties are affected by theinterfaceroughness. The zone expands with the increment ofinterfaceroughness until it reaches the maximum when the roughness also reaches or exceeds its marginal value. The behavior of shear dilatancy of the red clay is shownwhen the normal stress is low. Theinterfaceroughness has little influence on the behavior of shear dilatancy &shear shrinkage of red clay.关键词
粗糙度/结构接触面/大型直剪试验/红黏土/变形协调Key words
roughness/structure interface/large-scale direct shear test/red clay/compatibility of deformation分类
建筑与水利引用本文复制引用
陈俊桦,张家生,李键..接触面粗糙度对红黏土-混凝土接触面力学性质的影响[J].中南大学学报（自然科学版）,2016,47(5):1682-1688,7.基金项目
国家自然科学基金资助项目(51378514)(Project(51378514)supported by theNationalNaturalScienceFoundationof China) （51378514）
