| 研究生: |
蔡裕峰 Tsai, Yu-Feng |
|---|---|
| 論文名稱: |
大規模深開挖基地抽水洩降行為模擬之研究 Performance Analysis of Pumping Induced Drawdown for Large Deep Excavation Site |
| 指導教授: |
陳景文
Chen, Jing-Wen |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系碩士在職專班 Department of Civil Engineering (on the job class) |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 101 |
| 中文關鍵詞: | 抽水試驗 、解壓井 、MODFLOW 、率定 、敏感度分析 |
| 外文關鍵詞: | MODFLOW code, sensitivity analysis, calibration, pumping test, relief well |
| 相關次數: | 點閱:117 下載:6 |
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本研究主要探討位於高雄縣鳳山市某一深開挖工程之現地抽水試驗案例,本次抽水試驗配置一口抽水井及3口觀測井,以定量抽水方式進行試驗。各階段進行抽水井及觀測井之水位量測,量測時係採電子式水壓計進行。至於水理參數之分析則採用Jacob不平衡方程式,就各觀測井於各階段量測之資料進行評估與比對。
由現場抽水試驗所求得之水理參數來調整解壓抽水之配置,惟抽水洩降仍未達需求,故於現場加設6口解壓井,顯示抽水試驗所得之參數過小。本研究嘗試採用MODFLOW建立小區域之地下水流數值模式模擬實際開挖降水之群井抽水行為,再比對各觀測井之洩降,以參數敏感度分析及模式率定來求得合理之水理參數。
This research is mainly on study of pumping test at a large deep excavation site, which is located in Fongshan city of Kaohsiung county. This pumping test includes one main well and three observation wells, involving one stage of test : constant pumping test. Whereas electrical piezometers were adopted to measure the change of groundwater pressure through the entire pumping test. For hydraulic coefficient evaluation, Jacob’s method were adopted for comparison.
Hydraulic coefficient obtained from pumping test were used to adjust the design of relief well. However, the result shown that it does not meet the requirement. Therefore another 6 wells were added and it proved that the coefficient is still too low. So the “MODFLOW” code was used to simulate the underground water behavior of a small area, and comparison had been made from the coefficient obtained from each observation well. Subsequently, sensitivity analysis and calibration of the coefficient will be used to determine the reasonable hydraulic coefficient.
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