Environmental factors of road slope stability in mountain area using principal component analysis and hierarchy cluster |
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Authors: | Huiqin He Shaocai Li Hailong Sun Ting Yang |
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Institution: | (1) College of Life Sciences, Sichuan University, 29 Wangjiang Street, Chengdu, 610064, Sichuan, China;(2) Department of Life Sciences and Food Engineering, Yibin University, 8 Jiusheng Road, Yibin, 644000, Sichuan, China |
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Abstract: | Nine environmental factors of 147 roadside soil samples were administered in Sichuan Basin of China and principal component
analysis was conducted using the Pearson correlation matrix. The results show that the first four principal components whose
eigenvalue is over 1.00 can be extracted. The first principal component which is consisted of rock type, soil type, weathering
degree, and soil depth is the most important factor of all. The geographical position which is consisted of altitude, longitude,
and latitude is included in the second and the third principal components. The fourth principal component shows that the terrain
factor influences the rock slope stability. The hierarchy cluster shows that rock type and soil type play the maximum positive
correlation, while the slope and the aspect present the maximum negative correlation. |
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Keywords: | |
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