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一、降雨触发滑坡本文讨论为防治滑坡而进行的暴雨分析。諸如地质和水文地质条件、地形、气候和风化作用等因素都影响坡体的稳定性。在上述諸因素中,降雨是最重要的,它能起到触发滑坡的作用。触发的作用主要是:(1)增加坡体的重量;(2)浸泡软化易滑地层,形成饱和粘泥薄层,使抗剪强度大幅度降低;(3)水充满裂隙时,形成静水压力,当出现水头时,形成动水压力;(4)水的于湿交替导致土(岩)体开裂,使更多的水进入坡体,进一步恶化坡体情况。由降雨引起滑坡的事例很多:四川省汉源县几乎
First, the rainfall triggered landslides This article discusses the prevention of landslides and heavy rain analysis. Factors such as geological and hydrogeological conditions, topography, weather and weathering all contribute to the stability of the slope. Among the above factors, rainfall is the most important factor that can trigger a landslide. The triggering effect is mainly as follows: (1) increasing the weight of the slope body; (2) immersing the softening and slippery formation to form a thin layer of saturated slime and greatly reducing the shear strength; (3) when the water fills the fracture, hydrostatic pressure , When the water head, the formation of hydrodynamic pressure; (4) alternating water wet led to soil (rock) body cracking, so that more water into the slope body, further deterioration of slope conditions. There are many examples of landslides caused by rainfall: Hanyuan County, Sichuan Province, almost