応用力学論文集
Online ISSN : 1884-832X
Print ISSN : 1345-9139
ISSN-L : 1345-9139
植生の吸水作用が地盤の安定性に及ぼす影響
河井 克之山田 竜太郎飯塚 敦橘 伸也大野 進太郎
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キーワード: 不飽和土, 植生, 安定解折
ジャーナル フリー

2008 年 11 巻 p. 443-450

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Empirically, it is known that the vegetation influences on the earth structure. Kawai et al. focused on the effects of water uptake induced by the vegetation. They regarded it as an effect of decreasing soil moisture and applied the effect to unsaturated soil/water coupled F. E. analysis. In this study, the soil/water coupled F. E. analysis code is rearranged with the constitutive model for unsaturated soil proposed by Ohno et al.. In their model, the effective degree of saturation are applied as a parameter expressing stiffness of unsaturated soil to enable application of unsaturated soil mechanics to actual problem in geotechnical engineering site. To verify the applicability of soil/water coupled analysis, the accident that the vegetation uptake work brought about the non-uniform settlement of the ground and damaged the building in Poland are simulated. Consequently, it was found that the uptake increased suction and encouraged non-uniform settlement of ground surface. Its effects appeared prominently in a dry ground having low groundwater level and much uptake. This method is effective to understand the effects of vegetation.

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