地すべり地盤の変形に及ぼす間隙水圧の影響についての一考察

概要

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The relationship between pore water pressure and displacement was examined which had been obtained by the experiment on the artificial occurrence of landslide on the natural slope. The results obtained are as follows.<BR>1) Strain rate increases exponentially as pore water pressure increases.<BR>2) If the relationship between rate of change of pore water pressure and strain rate of the ground can be regarded as the relationship between input and output in the linear system, the spectral ratio of the strain rate to the rate of change of pore water pressure can be approximately expressed by the system function of the Voigt Model or the Bingham Model.<BR>3) It is presumed from 2) that the pore water pressure has had direct effects upon the land deformation in this experiment.<BR>4) In the band of higher frequency the discrepancy between the spectral ratio in 2) and the theoretical values calculated from the system functions is caused by the assumption that the phenomena were regarded as the linear system. It is thought that the actual phenomena show the nonlinearity as in 1) by some factors of the lowering of strength of the ground and so forth.