红层在我国东南、西南、西北地区广泛分布，因其膨胀收缩性、遇水崩解性、岩体软弱性等特点，往往不能直接作为填料应用于路基工程，必须进行物理或化学改良处理。通过文献调研，本文从红层崩解机理、工程改良方法、改良效果及环境耐久性等方面对国内外研究进行了梳理。并结合现有研究，提出未来应加强环境荷载（如干湿、冻融作用）及静、动荷载单独或耦合作用下改良红层的耐久性研究。

Red layer is widely distributed in the southeast, southwest and northwest of China. Due to its characteristics of expansion and contraction, water disintegration, rock softness, it often can't be directly used as a filler in roadbed engineering, and must be physically or chemically improved. In this paper, through literature research, domestic and foreign studies are sorted out and discussed in terms of disintegration mechanism, engineering improvement methods, improvement effect and environmental durability of red layer. Combined with existing research, it is proposed that the durability research of improved red layer under environmental loads and static and dynamic loads, either alone or coupled, should be strengthened in the future.

U416.1

西北民族大学引进人才科研项目（Z2302818）；甘肃省青年科技基金计划（22JR5RA089）；甘肃省2023年研究生创新之星项目（2023CXZX-205）