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土的结构性是决定土体物理力学性质的根本因素之一,但是长期以来没有得到人们充分的重视。本文分别采用微观观测和宏观力学试验手段,分析由冻胀融沉作用而引起的辽西风积土结构性变化。通过试验发现,土的结构随着冻胀与融沉产生显著的变化,并且在冻融作用后,土的强度明显降低。本论文的研究使该区季节性冻土的结构性研究向前推进了一步。
The structural nature of soil is one of the fundamental factors that determine the physical and mechanical properties of soil. However, it has not been given enough attention by people for a long time. In this paper, microscopic observations and macroscopic mechanical tests were used to analyze the structural changes of the West Liaoning aeolian soil caused by frost heaving and thawing. It is found through experiments that the structure of soil changes significantly with the frost heave and thawing, and the strength of soil decreases obviously after freeze-thaw. The research in this thesis has taken a step forward in the structural study of seasonal frozen soils in the area.