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结合宜巴高速公路郑家垭隧道进口弃土场典型实例,在常规正交试验设计分析的基础上,引入基于灰色关联法的改进正交设计法,并运用Flac3d数值模拟软件,对该区域弃土场边坡稳定性的6种影响因素进行分析,找到影响该处边坡稳定性的敏感因素。分析结果表明,该区域内弃土场边坡滑面处土体的强度参数以及边坡的临空面形态对其边坡稳定性影响较大,容重和坡率对弃土场边坡稳定性影响较小,结果与灰色关联法、主成分分析法结果一致。因此认为该改进的正交设计法得到的结果比较可靠。
Combined with the typical example of the spoil ground of Chengjiaya tunnel of Yiba expressway, based on the design of orthogonal experiment, an improved orthogonal design method based on gray relational method is introduced, and the numerical simulation software Flac3d is used to analyze the spoil field Six influencing factors of slope stability are analyzed to find out the sensitive factors that affect the stability of the slope. The analysis results show that the strength parameters of the soil in the landslide of the spoil grounds in the area and the shape of the faces of the landslides have a great influence on the stability of the sideslope. The impact is small, the result is consistent with the gray correlation method and principal component analysis. Therefore, the improved orthogonal design method is considered to be more reliable.