Model Tests on the Sliding Behavior of Granular Soil Slopes
Date Issued
2007
Date
2007
Author(s)
Chen, Yi-Nung
DOI
zh-TW
Abstract
Slope instability resulting from erosion, landslides, debris flows, rock falls, and so on is a serious problem in Taiwan. These slope failures have caused tremendous impacts on economic and loss of lives. And until now, there have been no conclusions whatsoever in predicting the influence area after a slope fails. Thus, the aims of this study are, first, to understand the behavior of movement of granular soil slope and its corresponding influence area, and to derive an analytical solution of the said influence area.
For the first objective, in order to study the mentioned behavior, a physical model composed of Vietnam sand was used to perform some tests. Experimental images were taken by charge coupled device (CCD) cameras and the dynamics of the velocity of sand was measured by particle image velocimetry (PIV) measurement technique. PIVview2C/3C software was used to deal with the images taken in all tests. And for the second objective, from the concepts of particle mechanics and kinematics, the simplified mathematical solution was derived.
The results show that the relevant factors influencing the slope failure are the slope angle of lower slope, material in the base of slope, relative density, and slope angle of upper slope in order of influence degree. In views of velocity or of influence area, the order of influence degree is the same. In addition, both the sliding velocity and the influence area are larger if the slope angle is steeper, the relative density is smaller and using sand as the base material.
Moreover, the findings in this study will be helpful to reduce the risk of loss of lives under the threat of slope failures.
Subjects
邊坡滑動
PIV
顆粒性土壤
影響範圍
slope sliding
granular soil
influence area
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R94521115-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):1fed2b9ce3253b958e2c826584f18ecd