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一、引言 中国北部黄土高原的边坡非稳定性问题是一种重要的地貌现象。它常因雨水、地下水、地震和人类活动等因素引起滑坡而造成地质灾害。在结构上,黄土是熟为人知的结构上不稳定的物质。在兰州附近黄土的最大厚度达到约335m。崩塌和滑坡是黄土地区的常见灾害,曾经给人民的生命财产带来严重损失。我们对兰州附近的2000多个滑坡进行了研究(图1)。对这种灾害的日益重视,不仅是为了人民的生命安全,而且还是为了兰州地区的发展
I. Introduction Slope instability in the Loess Plateau in northern China is an important geomorphological phenomenon. It often causes geological disasters caused by landslides caused by rain, groundwater, earthquakes and human activities. Structurally, loess is a well-known structurally unstable substance. The maximum thickness of loess near Lanzhou reaches about 335m. Collapse and landslides are common disasters in the loess area, which have caused serious losses to people’s lives and property. We studied more than 2000 landslides around Lanzhou (Figure 1). The growing emphasis on this kind of disasters not only for the safety of people’s lives, but also for the development of Lanzhou