我国北方寒冷地区,存在着多年冻土和季节性冻土。由于该地区的地理位置、地貌、水文地质以及气候条件等因素的影响,使其地表面层,因剧烈的冻融交替变化,而产生冻土裂缝,给工业、交通、水利等工程建设带来危害。为此,很有必要对冻土裂缝进行研究与探讨。 冻土裂缝的形成取决于粒度成分、土的含水量和物理力学性质,以及土中的温度梯度。粘土、亚粘土、泥炭土含水量大于最大分子容水量,并在冻结状态时具有整体性。粘性土中含水量较小时,形成干缩裂缝整体性破坏。粗粒砂土和粗碎屑土在冻结状态下, Cold areas in northern China, there is the permafrost and seasonal frozen soil. Due to the geographical location, geomorphology, hydrogeology and climatic conditions of the area, the surface layer of the land is affected by the drastic freeze-thaw cycles, resulting in fractures of frozen soil that bring about industrial, traffic and water conservancy projects. harm. Therefore, it is necessary to study and discuss the permafrost cracks. The formation of permafrost cracks depends on the grain size composition, the soil moisture content and the physical and mechanical properties, and the temperature gradient in the soil. Clay, loam, peat soil moisture content is greater than the maximum molecular water content, and in the frozen state with integrity. When the water content in cohesive soil is small, the integrity destruction of dry shrinkage cracks is formed. Coarse sand and coarse clastic soil in the frozen state,