坡面冲刷是膨胀土边坡常见的坡面失稳形式之一，坡面防护对膨胀土边坡的稳定十分重要。
The surface erosion of expansive soil slope was a kind of common phenomena, so the slope surface protection was an important way to keep the slope stability.
同时，对在0.9%的生理盐水中浸泡不同时间后的改性蒙脱土进行X射线衍射和热重分析。
Meanwhile, the X-ray diffraction and thermogravimetric analysis of modified montmorillonite after soaking in 0.9% saline for different time were performed.
在非饱和土条件下产生的负孔隙水压力（基质吸力）对于预测如边坡、挡土墙、挖方工程、基础工程之类的土石结构的稳定性十分重要。
Unsaturated soil condition which give rise to negative pore pressure is important in evaluating the stability of geotechnical structures such as slopes, retaining walls, excavations and foundations.
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