基于主成分分析法的铁路路堑高陡岩质边坡安全性评价

Safety Evaluation of High⁃Steep Rock Slope of Railway Cutting Based on Principal Component Analysis Method

针对传统边坡安全性评价方法主观因素影响较大且缺少严格理论依据的问题,提出一种基于主成分分析法的铁路路堑高陡岩质边坡安全性评价新方法。该方法有严谨的数学推导过程,客观性强。运用该方法对20处高陡岩质边坡的10项评价指标进行了降维分析。20处高陡岩质边坡中有8处为稳定状态,7处为基本稳定,3处为潜在不稳定,2处为极不稳定,与专家评价结果吻合较好,证明该方法科学合理。

Aming at the problem that the subjective factors of traditional slope safety evaluation methods have great influence and lack strict theoretical basis,a new method for safety evaluation of high-steep rock slopes in railway cuttings based on principal component analysis was proposed.This method has a rigorous mathematical derivation process and is highly objective.Using this method,dimensionality reduction analysis was performed on 10 evaluation indexes of 20 high-steep rock slopes.The safety evaluation showed that among the 20 high-steep cutting rock slopes,8 slopes are evaluated stable,7 are basically stable,3 are potentially unstable,2 are extremely unstable,which is in good agreement with the expert evaluation results,proving that the method is scientific and reasonable.