Applying Earth Electrical Logging to Investigate Stratum Characteristics in the visitor center of Siangyang ational Forest Recreation Area
| Autor: | Huang, Ching-Wen, 黃靚文 |
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| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 Siangyang National Forest Recreation Area is the highest elevation in Taiwan forest recreation area. In 2009,typhoon Morach caused extensive damage to Forest Recreation Area. Because the visitor center in the park is the only object of preservation, and the groundwater level of the visitor's center is always high. To provide data of regional strata in more detail, the earth electrical logging method applied in geophysical explorations was used in this study to compensate for the current borehole deficiencies and limitations. This research was conducted 29 survey points along five survey lines were established. Depth range from 9~33m, ρa-a electrical surveying data was run through Surfer 10 which plotted a two-dimensional formation of the electrical profile and analyze the curve characteristics and used the research results and inclinometer data and drilling data were compared to confirm. The results of this study showed that the main stratum structure under the visitor center is gray-black Sandstone and Slate, and structure is very broken, underground in the areas of high of water concentration is slate that contain quartz and structure is poorly broken. By comparing with the displacement in the ground, it is found that the displacement pattern of the tourist center strata is mainly by extrusion damage, and the main change interval mainly occurred in areas of high water levels, so we suggest that the use of underground drainage engineering, is favorable for the water table stability of the deep groundwater. Pore water pressure will cause the decline of underground water level of shallow area to ease the subsidence and deformation by the groundwater change range violent in future, it is the best interests to increase the stability of the slope. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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