地表面変位に着目した降雨による急勾配砂質土斜面崩壊予測のための斜面変形モデル(<小特集>降雨による斜面崩壊の予測)

概要

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In order to simulate shear deformation and failure of sandy steep slope due to rainfall, shear deformation model is newly developed. The model consists of 1-dimensional unsaturated seepage analysis model which calculates the distribution of water content and suction in the slope, and 2-dimensional shear deformation model of the slope which calculates shear deformation due to the change of the stress in the slope. The latter can treats the shear deformation which is caused by the change of suction in the slope. The simulations of the shear deformation of the slopes with different inclination and thickness of soil layer are carried out by the model in order to examine the influence of geometry of the slope to the shear deformation of the slope. By the simulations, it is made clear that remarkable shear deformation and surface displacement of the slope occurs earlier with higher inclination and larger soil thickness. It means surface displacement can be a useful parameter for the observation of the unstablity of the slope in the case of steep slope or thick soil layer.
社団法人地盤工学会の論文
2001-07-01