黄土滑坡与降雨关系的模型试验研究

Model experimental study on the relationship between landslide and rainfall

针对降雨诱发滑坡的机理,从定量化的角度,研究滑坡安全系数与降雨强度和降雨历时的关系。采用降雨滑坡模型试验监测边坡在不同降雨强度、降雨历时下发生破坏的过程,通过室内试验测定含水率、密度和抗剪强度指标等物理力学指标,然后对滑坡和降雨之间的关系进行归纳分析。研究结果表明:滑坡安全系数和降雨强度、降雨历时之间存在定量关系,并拟合出相关公式。通过Midas数值模拟进行对比分析,从而验证了拟合公式的可靠性。

In view of the mechanism of rainfall induced landslides,this paper researched the relationship between landslide safety coefficient and the intensity and duration of rainfall from the aspect of quantitative.The rainfall landslide model test monitored the slope destruction process in different intensity and duration of rainfall,and the physical mechanics indexes such as the water content,density and shear strength could be determined by the laboratory test.Then the relationship between rainfall and landslide could be summarized.The results show that there is a quantitative relationship between the landslide safety coefficient and the intensity and duration of rainfall,and the relevant formula is fitted out in this paper.Then,the reliability of the formula is verified through the comparison between Midas numerical simulation results and the analysis results.