A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
EVALUATION METHOD OF OCCURRENCE RISK OF DEBRIS FLOW, AND EVALUATION PROGRAM OF OCCURRENCE RISK OF DEBRIS FLOW
To provide an evaluation method of occurrence risk of debris flow suitable for railroad vehicle operation regulations.SOLUTION: The evaluation method of occurrence risk of debris flow includes the steps of: setting the topsoil thickness of multiple meshes included in a modeled mountain stream area; calculating the safety factor that indicates the stability of the slope in each multiple meshes based on the current rainfall and multiple mesh gradients and topsoil thickness; and determining the operation regulations of railway vehicles in mountain stream area based on the collapse area ratio, which is the ratio of the dangerous area to the slope area in the mountain stream area. The dangerous area is calculated as the total area of multiple meshes whose safety factor is below a threshold.SELECTED DRAWING: Figure 1
【課題】鉄道車両の運行規制に適した土石流の発生危険度評価方法を提供する。【解決手段】本開示は、モデル化された渓流域に含まれる複数のメッシュの表土層厚を設定する工程と、現在の雨量と、複数のメッシュの勾配及び表土層厚とに基づいて、複数のメッシュごとに斜面の安定性を示す安全率を算出する工程と、渓流域における斜面面積に対する危険面積の比である崩壊面積率に基づいて、渓流域における鉄道車両の運行規制を判断する工程と、を備える土石流の発生危険度評価方法である。危険面積は、複数のメッシュのうち、安全率が閾値以下であるメッシュの合計面積として算出される。【選択図】図１
EVALUATION METHOD OF OCCURRENCE RISK OF DEBRIS FLOW, AND EVALUATION PROGRAM OF OCCURRENCE RISK OF DEBRIS FLOW
To provide an evaluation method of occurrence risk of debris flow suitable for railroad vehicle operation regulations.SOLUTION: The evaluation method of occurrence risk of debris flow includes the steps of: setting the topsoil thickness of multiple meshes included in a modeled mountain stream area; calculating the safety factor that indicates the stability of the slope in each multiple meshes based on the current rainfall and multiple mesh gradients and topsoil thickness; and determining the operation regulations of railway vehicles in mountain stream area based on the collapse area ratio, which is the ratio of the dangerous area to the slope area in the mountain stream area. The dangerous area is calculated as the total area of multiple meshes whose safety factor is below a threshold.SELECTED DRAWING: Figure 1
【課題】鉄道車両の運行規制に適した土石流の発生危険度評価方法を提供する。【解決手段】本開示は、モデル化された渓流域に含まれる複数のメッシュの表土層厚を設定する工程と、現在の雨量と、複数のメッシュの勾配及び表土層厚とに基づいて、複数のメッシュごとに斜面の安定性を示す安全率を算出する工程と、渓流域における斜面面積に対する危険面積の比である崩壊面積率に基づいて、渓流域における鉄道車両の運行規制を判断する工程と、を備える土石流の発生危険度評価方法である。危険面積は、複数のメッシュのうち、安全率が閾値以下であるメッシュの合計面積として算出される。【選択図】図１
EVALUATION METHOD OF OCCURRENCE RISK OF DEBRIS FLOW, AND EVALUATION PROGRAM OF OCCURRENCE RISK OF DEBRIS FLOW
土石流の発生危険度評価方法、及び土石流の発生危険度評価プログラム
OKI MOTOHIRO (author) / SHINKAI HIDEMASA (author) / HAYASHI HIROKI (author) / FUNAHASHI HIDEMARO (author) / ASANO YOSHIFUMI (author) / MIYATA NAOKI (author) / HARAGUCHI KATSUNORI (author) / YOKOTA SATOSHI (author) / SAWAMURA AKEMI (author)
2020-10-15
Patent
Electronic Resource
Japanese
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Comprehensive Mathematical Evaluation on Risk of Debris Flow
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