Effect of groundwater pressure on slope stability in shale formation

• Main Authors: Yu-ChengChang, 張育誠
• Other Authors: Jian-Hong Wu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/88202709448182998263

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 100 === Recently, due to the impact of extreme weather caused by the rainfall changes. According to the rainfall data of the Central Weather Bureau statistics show that rainfall in Taiwan showing the wet and dry extremes, this situation makes the rainfall situation was concentrated in the rainy season and summer. Morakot brought a historical record of rainfall in August 2009, resulting in the collapse of the south of the country many mountain slope, including the slope of the water reservoir catchment area. Nanhua Reservoir is a important reservoir in the south of country, to cope with extreme rainfall on the slope stability of the water catchment area, This study selected the Nanhua Reservoir catchment slope as the object of study. In this study, we execute site survey along the South 179 County Road and compare the collection of image maps of different years.And chose the research site as study slope that has sliding potential. The study includes the investigation of geological drilling, the use the Geoelectric resistance detection, tilting observation tube, groundwater monitoring, rainfall data records on-site monitoring in the study area. This study was completed geological drilling survey in 2010 through the 2010-2011, and find out the trial slope of the regional rainfall and slope changes direction, the possible depth of the sliding surface, in the meantime using the finite difference software to test slope stability analysis, the relationship between groundwater table and slope safety factor ,and then obtain a critical rainfall obtained by monitoring the groundwater level changes and rainfall relationship.