Model test on the sliding behavior and infiltration failure of granular soil slopes
Date Issued
2008
Date
2008
Author(s)
Ku, Chia-Wei
Abstract
Due to the increase of over-development in mountainous lands, slope stabilities become more and more important. Present studies about slope mechanisms are mainly in qualitative description. If the understanding of the mechanism can be improved, then the assessment of the behavior and the influence area that induced by slope failures can be effectively prevented on the loss of lives and properties. This experiment comprise two parts: the study of dry granular soil slope failure and the water infiltrating slope failure. To observe the granular soil behavior, the Particle Image Velocimetry (PIV) is used to analyze the sliding images. The effects of variables are analyzed to develop formulae which can be used to predict the speed, the displacement of a sliding mass, and the influence area caused by the slope failure. Considering water is an important factor of slope failure, the conducted experiment through infiltrating from the crest of the slope for different inclinations of bedding conditions is discussed with the failure situation, the infiltrating time and influence area. The conclusions obtained from the test results are:(1) Newton’s law of motion can be applied for the displacement of soil movement; (2) The important variables in order are: down-slope angle, up-slope angle, and up-slope high; (3) The time of arrival in the deposition has no connection with the quantity of sliding mass, and it has an inverse relation with the difference of the up-slope and the down-slope angles; (4) Regarding with the experiment of water infiltrating into slopes, the slope failures are initiated with piping at the toe of the slope, and then progresses upwards until the whole slope collapses.
Subjects
slope sliding
Particle Image Velocimetry
granular material
infiltration
SDGs
Type
thesis
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