Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SLOPE FACE STABILIZATION ANALYSIS METHOD
PROBLEM TO BE SOLVED: To provide a method by which an inhabitant predicts a slope face collapse of one's own house back side via the Internet, by predicting a surface layer collapse from a rainfall amount.SOLUTION: A loose layer thickness (d) is determined by a mathematical expression (3)d=1/(X*tanθ). Apparent adhesive force C' is determined by a mathematical expression (4)C'=d*γw*tanθ as being proportional to the loose layer thickness (d). Assuming (d) as an effective loose layer thickness (dn) by a crack, and an internal friction angle φ of surface soil as being equal to θ, a mathematical expression (5) being 1+{(dn-u)*tanθ}/W*sinθ=Fs is provided. At this time, a reduction rate (n) of the apparent adhesive force C' is a reduction rate (n) of the apparent loose layer thickness (d), and (n) is associated to distortion by a continuous rainfall amount before predicting a collapse, and since a limit underground water level (un) in safety factor Fs≤1.0 time is fixed, a rainwater inflow amount to a loose layer is thought to be proportional to a crack width of the ground surface, and a water level of reaching the collapse is determined by hydraulic expressions from a time rainfall amount, thereby the occurrence of the collapse is predicted.SELECTED DRAWING: Figure 1
【課題】降雨量から表層崩壊を予知し、インターネット等を通じて住民が自宅裏の斜面崩壊予測を行う方法を提供する。【解決手段】数式（３）ｄ＝１／（Ｘ・tanθ）で緩み層厚ｄを求める。見かけの粘着力Ｃ’を、緩み層厚ｄに比例するとして、数式（４）Ｃ’＝ｄ・γｗ・tanθで求める。ｄを亀裂による有効緩み層厚ｄｎ、表土の内部摩擦角φはθに等しいとすると、１＋{（ｄｎ−u）・tanθ｝／Ｗ・sinθ＝Ｆｓなる数式（５）を得る。このとき見かけの粘着力Ｃ’の低下割合ｎは見かけの緩み層厚ｄの減少割合ｎであり、ｎを崩壊予知前の連続雨量によるヒズミに関連づけることで、安全率Ｆｓ≦１．０時の限界地下水位ｕｎが確定するので、緩み層への雨水流入量を、地表の亀裂幅、に比例すると考えて、崩壊に至る水位を、時間雨量から水理式他で求め、崩壊発生を予測することとした。【選択図】図１
SLOPE FACE STABILIZATION ANALYSIS METHOD
PROBLEM TO BE SOLVED: To provide a method by which an inhabitant predicts a slope face collapse of one's own house back side via the Internet, by predicting a surface layer collapse from a rainfall amount.SOLUTION: A loose layer thickness (d) is determined by a mathematical expression (3)d=1/(X*tanθ). Apparent adhesive force C' is determined by a mathematical expression (4)C'=d*γw*tanθ as being proportional to the loose layer thickness (d). Assuming (d) as an effective loose layer thickness (dn) by a crack, and an internal friction angle φ of surface soil as being equal to θ, a mathematical expression (5) being 1+{(dn-u)*tanθ}/W*sinθ=Fs is provided. At this time, a reduction rate (n) of the apparent adhesive force C' is a reduction rate (n) of the apparent loose layer thickness (d), and (n) is associated to distortion by a continuous rainfall amount before predicting a collapse, and since a limit underground water level (un) in safety factor Fs≤1.0 time is fixed, a rainwater inflow amount to a loose layer is thought to be proportional to a crack width of the ground surface, and a water level of reaching the collapse is determined by hydraulic expressions from a time rainfall amount, thereby the occurrence of the collapse is predicted.SELECTED DRAWING: Figure 1
【課題】降雨量から表層崩壊を予知し、インターネット等を通じて住民が自宅裏の斜面崩壊予測を行う方法を提供する。【解決手段】数式（３）ｄ＝１／（Ｘ・tanθ）で緩み層厚ｄを求める。見かけの粘着力Ｃ’を、緩み層厚ｄに比例するとして、数式（４）Ｃ’＝ｄ・γｗ・tanθで求める。ｄを亀裂による有効緩み層厚ｄｎ、表土の内部摩擦角φはθに等しいとすると、１＋{（ｄｎ−u）・tanθ｝／Ｗ・sinθ＝Ｆｓなる数式（５）を得る。このとき見かけの粘着力Ｃ’の低下割合ｎは見かけの緩み層厚ｄの減少割合ｎであり、ｎを崩壊予知前の連続雨量によるヒズミに関連づけることで、安全率Ｆｓ≦１．０時の限界地下水位ｕｎが確定するので、緩み層への雨水流入量を、地表の亀裂幅、に比例すると考えて、崩壊に至る水位を、時間雨量から水理式他で求め、崩壊発生を予測することとした。【選択図】図１
SLOPE FACE STABILIZATION ANALYSIS METHOD
斜面安定解析方法
AKIYAMA KENICHIRO (Autor:in)
15.12.2016
Patent
Elektronische Ressource
Japanisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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