報告書番号

N06020

タイトル（和文）

主成分分析法を用いた斜面挙動の分析方法とその維持管理への適用

タイトル（英文）

The analyzing method of the slope behavior by the principal component analysis and its application to the slope maintenance

概要 （図表や脚注は「報告書全文」に掲載しております）

主成分分析を用いて斜面の挙動を把握する方法を提案した．この方法を，切り取り斜面に対する光波測量の結果に適用し，冬期の斜面の挙動を分析した．その結果，冬期の当該斜面は斜面の山谷方向の変動が卓越しており，その変動は切土法面よりも地山で大きい傾向があることが明らかになった．また，既設構造物に近接する自然斜面の光波測量及び孔内傾斜計の結果に適用し，斜面の挙動を3次元的に分析した．その結果，斜面は谷方向への動きが全体の動きの7割を占めていることが明らかになった．以上より，主成分分析法を斜面の挙動計測結果に適用することで，斜面の全体の挙動を把握することができる．さらに，斜面の計測データを用いて算定した主成分を用いて，局所的な崩壊や全体的な挙動の変化の傾向が把握でき，この方法で斜面の維持管理を合理的に行える可能性がある．

概要 （英文）

We propose an analyzing method of slope behavior by the principal component analysis. We applied this method to displacement data measured by the electro-optical distance meters on an excavation slope.
As results, the following two points of the movement of the slope were clarified. After the slope moves in the direction of the valley in the early winter, it returns in the direction of the mountain
The movement is larger than the cut slope in natural ground.

Next, this method was applied to the displacement data measured by the electro-optical distance meters and borehole inclinometer in the slope near an existing hydroelectric power plant, and three-dimensional slope behavior was examined. It was clarified that the movement of the slope in the direction of the valley accounted for 70 percent of the total movement. This method has possibilities as the estimation on behavior of slope.

In addition, the data absence that is one of the abnormality measurement was able to be recognized by using the principal component score calculated by measured data of slope.
This method can be used to the reasonable maintenance of slope because it can understand the change in a local slope failure and the overall movement.

報告者

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