人工制备结构性黄土抗拉强度研究

近年来,随着西部经济的快速发展,基础设施的大量建设,黄土由于拉伸破坏而造成的灾害越来越多,使得人们认识到研究黄土抗拉强度的重要性。通过对人工制备结构性黄土的抗拉强度试验,研究了含水率、干密度对黄土抗拉强度的影响规律及机理。试验结果表明,结构性黄土抗拉强度最大值出现在最优含水率附近处,抗拉强度随含水率的增大先增加后减小;随着干密度的增大,抗拉强度表现出一直增大的趋势;结构性黄土受拉时主要表现为脆性破坏;含水率及干密度主要通过改变颗粒间滑动摩擦力、黏聚力等作用,进而影响土体抗拉强度。

Experimental study of tensile strength of artificially structured loess

In recent years, with the rapid development of the western economy, the construction of a large number of infrastructure, more and more disasters caused by the tensile failure of loess, so that people understand the importance of studying the tensile strength of loess. In this paper, the effect of water content and dry density on the tensile strength of loess is studied by means of tensile strength test of artificially structured loess. The experimental results show that the maximum tensile strength of structural loess appears in the vicinity of the optimal water content, the tensile strength increases first and then decreases with the increase of water content.; With the increase of dry density, the tensile strength showed a tendency to increase; and the main performance of structural loess was brittle failure;The water content and dry density are mainly influenced by the action of sliding friction force and cohesion force, which can influence the tensile strength of the soil.