洛川黄土结构特性试验研究

Research on structural characteristics of Luochuan loess

众所周知,不同分布区域的黄土,由于各地的地理地质和气候条件不同,使得黄土的结构特性差异很大,即使同一地区不同土层位置的黄土,其结构特性也是存在差异的。另外,随着经济建设的飞速发展,越来越多的工程涉及更深层次的黄土,因此,考虑沉积环境和应力历史,开展不同沉积时代黄土的结构特性研究具有重要意义。通过对洛川标准剖面的Q1、Q2、Q3、Q4黄土进行无侧限抗压试验和常规三轴试验,分析不同土类黄土的结构特性。试验结果表明:洛川黄土的结构特性随着取土深度的减小,呈减弱的趋势;洛川Q2黄土的结构特性随着初始含水率的增大,呈减弱的趋势。

As we all know,the structural properties of loess in different distribution of loess area is very different because of the different geographical and geological and climatic conditions around the country,even if the different layers of loess in the same area,its structural characteristics also exist differences. In addition,with the rapid development of economic construction,more and more projects involving deeper loess,so research the structural characteristics of different deposited era loess is of great significance by considering the depositional environment and stress history.Through the unconfined compression test and conventional triaxial tests,we studied the structural characteristics of different soil loess in Luochuan. The results showed the initial structural characteristics of Luochuan loess will trend to weakening with the decreasing of depth,meanwhile the structural characteristics of Luochuan Q2 loess will trend to weakening with the initial moisture content increasing.