摘要
进行了不同填料、不同法向应力和不同含水率下的拉拔试验研究,结果表明:填料的颗粒越均匀,填料与筋带的作用效果越好;含水率对筋土界面参数的影响表现为:界面摩擦角随含水率的增大先增大后减小,界面黏聚力随含水率的增大一直减小,同时根据试验研究结果对反映加筋土界面摩擦特性的双曲线模型进行了修正,用幂函数对似摩擦系数与法向力之间的变化关系进行拟合,其结果比较理想。
In relation to recollapose of soil cave of karst after backfilling, this paper analyzed the mechanism and conditions which the soil cave＇s formation is based, and derived the expression of downrange of groundwater depth under the initial conditions herein. Through the triaxial test for red clay, the relation between the triaxial test result and the compactness was obtained; and through the expression of critical downrange of groundwater depth for ground collapse and the triaxial test result, the relation between the downrange of groundwater depth and the compactness of backfill soil obtained, based on which the minimum fill compactness to prevent recollapse after backfilling at the place where the soil cave had collapsed was confirmed.
出处
《路基工程》
2014年第6期77-81,共5页
Subgrade Engineering
基金
攀枝花市科技局基金:攀枝花地区加筋填土关键设计参数的试验研究(2012CY-S-15)
关键词
拉拔试验
界面作用参数
加筋土
似摩擦系数
含水率
soil cave of karst
conditions of formation
ground collapse
downrange of groundwater depth
fill compactness
