Calculation of Passive-earth Pressure on the Retaining wall.
Case:Coulomb theory(Muller-Breslau theory),During Earthquake,Monotonous embankment surface,No cohesion.

Keyword

Okabe・Mononobe Equation,Coulomb theory,Muller-Breslau theory,Internal friction angle of soil,φ,Passive-earth Pressure coefficient,Retaining wall,friction angle between soil and wall,Total earth thrust,Monotonous embankment surface,No cohesion,During Earthquake.

Reference

・『道路土工擁壁工指針平成11年3月』(社団法人日本道路協会)
・『擁壁の設計と施工計画』(村上有誠)
・『建築物荷重指針・同解説(2004)』(社団法人日本建築学会)
・『擁壁の設計法と計算例』(右城猛)

Remarks

・KPE=(cos(φ+θ-θ0))^2/(cos(θ0)*(cosθ)^2*cos(δ-θ+θ0))/(1+(sin(φ+δ)*sin(φ+α-θ0)/cos(δ-θ+θ0)/cos(θ-α))^0.5)^2).
・θ0:Seismic compound angle.tanθ0=kH/(1-kV).
・kH:Horizontal seismic coefficient.It is recommended to input the value under 0.25(=245gal/980gal).
・kV:Vertical seismic coefficient.
・α(°) should be smaller than φ(°).
・δ(°) should be smaller than φ(°).
・φ(°):Internal friction angle of soil.
・δ(°):Friction angle between soil and wall during earthquake.

History

・2014/08/27:layout change.
・2009/05/09:Moved from www.am-consulting.co.jp to here.