论文部分内容阅读
以福建省永泰滑坡为例,利用电镜试验分析了类土质滑坡土体的微观结构,掌握了降雨对类土质土体微观结构的影响,并基于数值模拟方法从宏观上研究了不同降雨模型对类土质滑坡稳定性的影响。结果表明,含水率及干湿循环对土体微观结构的影响较为显著,表现为土体含水率越高,干湿循环的次数越多,土颗粒之间的连接减弱、定向性变差及排列趋于无序,进而造成其微观结构的破坏;另外,在总降雨量保持不变的情况下,不同降雨模型对滑坡稳定性的影响也较为显著,表现为高强度降雨工况对滑坡稳定性的影响低于低强度降雨工况对滑坡的影响,前期降雨对滑坡稳定性影响最大,后期次之,中期对滑坡稳定性影响最小。
Taking the Yongtai landslide in Fujian Province as an example, the microstructure of soil-like soils was analyzed by electron microscope and the effect of rainfall on the microstructure of soil-like soils was analyzed. Based on the numerical simulation, the effects of different rainfall models on Influence of Soil Landslide Stability. The results showed that the influence of moisture content and wetting and drying cycles on the microstructure of the soil was significant, which showed that the higher the soil moisture content, the more the number of wet and dry cycles, the weaker the connection between the soil particles, the worse the orientation and arrangement Tends to be disordered, which in turn leads to the destruction of their microstructure. In addition, the effect of different rainfall models on the stability of landslides is also significant under the condition of a constant total rainfall, which is manifested as follows: stability of landslides under high rainfall conditions Is lower than the impact of low intensity rainfall conditions on the landslide. Pre-rainfall has the greatest impact on the stability of the landslide, followed by the latter and medium-term has the least impact on the stability of the landslide.