| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 100 === In this study, two shallow slope sites had been chosen at Tai-20, to install the monitoring equipment. The soil tensiometer, soil moisture sensor, rain gauge, and inclinometer were installed in these sites. The monitoring data was collected, and the sensors were checked monthly.
The relationship of matric suction and volumetric water content can be fit the soil water characteristic curve by the numerical software, MATLAB, in this study. The finite element analysis program, ABAQUS, is used for seepage and stability analysis of the unsaturated slope using the soil water characteristic curve.
The fitting result of the relationship between the matric suction and volumetric water content is well agreement with four difference soil water characteristic curve models. Both the numerical analysis and monitoring results show that the volumetric water content of the shallow slopes increased, and the matric suction of shallow slope decreased significantly after rainfalls. The matric suction gradually recovered after cessation of rainfalls. Sliding of the shallow slope begins to occur when the matric suction is decreasing. The monitoring system and the numerical analysis are able to interpret the behavior of the shallow slope after rainfalls.
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