摘要:
对取自阜新—朝阳高速公路段的黄土进行了14C测年、颗粒分析、湿陷及常规试验等,对比分析了其基本特性,通过三轴剪切试验,获得了不同含水量的黄土剪切孔压、固结孔压、抗剪强度及剪切变形的变化特征。分析认为,辽西黄土此类特性由黄土的物质成分和结构特征所决定。对不同含水量的黄土剪切变形曲线建立力学模型,拟合结果表明,对于脆性破坏的应变软化曲线,刘祖典模型描述的效果并不理想,而文中建议的经验模型则较为适合。
Abstract:
Through the test of radiocarbon, granularmetric analysis, collapsibility and routine soil test etc, the basic characteristics of Liaoxi loess in Fuxing-Chaoyang Highway, Liaoning Province, are comparative analyzed. Meanwhile, variation characteristics of shearing pore water press, consolidation pore water press, shear strength and shear deformation are obtained through the triaxial shear test of the loess, then draw the conclusion that the internal structure and the composition of the Liaoxi loess determine its characteristics. Mechanics models about shear deformation curve of loess are founded, which indicates that the model of LIU Zu-dian is not suitable to describe the curves of brittle strain softening, while the empirical model proposed in the paper is more applicable.
下载: