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影响边坡稳定性的因素多而复杂,且影响程度不相同。以山西岢岚一黄土边坡为例,以常规正交试验设计分析为基础,结合灰色关联法,采用基于灰色关联法的改进正交试验设计法,并运用ADINA软件建立计算模型,分析了坡高、坡比、重度、黏聚力、内摩擦角和坡顶荷载6种因素对该边坡安全系数的敏感性。结果表明:该边坡岩土体强度参数、坡比和坡高对边坡安全系数影响最大,坡顶荷载和重度对安全系数影响最小。据此提出有针对性的边坡设计措施:该区域边坡稳定性分析时应尽量选取合理准确的强度指标,同时也应考虑坡高和坡比的影响。该结论可为晋北黄土丘陵沟壑区(Ⅰa区)的黄土边坡设计与加固提供一定的参考依据。
Factors that affect the stability of the slope are many and complex, and the degree of influence is not the same. Taking Huanglang-Loess slope in Shanxi Province as an example, based on the conventional orthogonal experimental design and analysis, combined with the gray correlation method, an improved orthogonal experimental design method based on the gray relational method was used, and the calculation model was established by ADINA software. High, slope ratio, severe, cohesion, internal friction angle and slope load on the slope safety factor. The results show that the strength parameters, slope ratio and slope height of the slope rock mass have the greatest influence on the slope safety factor. The load and severity of the slope head have the least influence on the safety factor. Therefore, the design of slope design is pointed out. When analyzing the stability of the slope in this area, reasonable and accurate intensity indexes should be selected as far as possible. At the same time, the influence of slope height and slope ratio should be considered. The conclusion can provide reference for the design and reinforcement of loess slopes in loess hilly and gully region of northern Shanxi (Ⅰa area).