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黄土含有起胶结作用的可溶盐。水溶解可溶盐,胶结结构强度降低或破坏,在一定应力下发生瞬时脆性变形,造成湿陷。结构影响湿陷量,但若无可溶盐胶结,即使是疏松结构,也只能发生高压缩。
Loess contains soluble salts that act as cements. When water dissolves soluble salts, the strength of cementation structure is reduced or destroyed, and instantaneous brittle deformation occurs under certain stress, causing collapse. The structure affects the amount of collapsing, but if there is no soluble salt cementation, even a loose structure can only cause high compression.