论文部分内容阅读
黄土滑坡是我国西北地区常见的地质灾害,且滑动突然,规模巨大.针对黄土滑坡特点,在探讨滑坡滑动机理时,提出根据降雨入渗深度为界限,上部土体采用饱和土体的相应计算参数,下部土体采用天然土体的相应计算参数分段赋值的新思路.应用上述思路,在对甘肃某黄土滑坡现场勘察、确定利用遗传算法反演边坡稳定分析的重要参数——降雨入渗深度的基础上,结合数值分析软件FLAC2D和FLAC/SLOPE对该滑坡进行了详细分析.结果表明遗传算法反演岩土力学参数是可行的;该滑坡滑动时的降雨入渗深度为5.3m;滑动机理为降雨入渗导致黄土坡体上部推动下部滑动的推移式滑坡.图5,表1,参12.
Loess landslide is a common geological disasters in northwestern China, with sudden sliding and huge scale.According to the characteristics of loess landslide, when discussing the landslide slip mechanism, it is proposed that according to the depth of rainfall infiltration, the corresponding calculation parameters of saturated soils , And the lower soil uses the new idea of the subsection assignment of the corresponding calculation parameters of natural soil.Using the above train of thought, in the site investigation of a loess landslide in Gansu, it is determined that the genetic algorithm is used to retrieve the important parameters of slope stability analysis - rainfall infiltration The landslide was analyzed in detail based on FLAC2D and FLAC / SLOPE.The results show that it is feasible to inverse the geotechnical parameters by genetic algorithm, the depth of rainfall infiltration when the landslide is sliding is 5.3m, Mechanism is caused by rainfall infiltration led to the upper part of the loess slope push sliding lower landslide Figure 5, Table 1,