The intension of soil is decreasing and expansion periodicity because of dry-wet variety. the cause is bed circle and bring shoulder of road pushing of expansive soil.
土体干湿循环变化使得土体强度降低和胀缩的周期性发生，这是一个恶性循环往复的过程，使得翻浆冒泥不断发生。
参考来源 - 南昆铁路膨胀土路基翻浆冒泥病害分析与改良土试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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