研究生: |
張偉哲 Wei-Che Chang |
---|---|
論文名稱: |
深層岩盤處置隧道之工程特性探討 The Engineering Characteristics of Deep Underground Disposal Tunnel in Rock Mass |
指導教授: |
陳志南
Chee-Nan Chen |
口試委員: |
林志森
Chi-Shen Lin 彭桓沂 Huan-Yi Peng 陳堯中 Yao-Chung Chen 林宏達 Horn-Da Lin 陳志南 Chee-Nan Chen |
學位類別: |
博士 Doctor |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2017 |
畢業學年度: | 106 |
語文別: | 中文 |
論文頁數: | 161 |
中文關鍵詞: | 地下深層處置隧道 、關鍵輪進開挖 、三維應力重分配 、主應力空間 、立體投影 、最佳化岩栓打設 |
外文關鍵詞: | Deep Underground Disposal Tunnel, Key Rounds Tunneling, 3D Stress Redistribution, Principal stress space, Stereographic Projection., Optimal Rock Bolt Installation |
相關次數: | 點閱:194 下載:16 |
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核能資源為人類生活品質帶來舒適性與便利性,進而提升社會經濟發展,然而核能使用後所產生之放射性廢棄物,對於人類及自然環境亦有相當潛在危險。因此,用過核燃料廢棄物之後續境內管理與最終處置處理對於世界各核能先進國家係重要之研究課題,目前大多規劃於隔絕人類生活圈之穩定深層地質環境中,興建地下深層處置設施來加以永久地處置。由於建造過程中所產生之三維主應力調整、變形累積分佈與塑性區等發展,對於深層處置設施之安全穩定性影響甚鉅,本研究採用三維數值軟體FLAC3D進行相關分析,探討地下深層核廢料處置隧道於掘進開挖之應力變化與位移分佈特性。
首先本研究將模擬之施工階段,分為先挖之馬蹄型隧道和後挖之處置坑共兩階段開挖依序進行探討,選擇隧道開挖面上不同線型之代表測點,包含頂拱(RO)、起拱點(SP)、隧道角隅(MC)、隧道底版(MF)進行輪進開挖引致之三維應力重分配與變形分析,再針對應力位移明顯變化之區間(關鍵輪進)進行更深入特性分析,包含二維及三維之安全性評估、開挖面周圍未挖岩體之三維主應力方向旋轉及借助立體投影圖分析呈現,最後彙整輪進開挖於開挖面上不同線型測點之周圍岩體之力學機制,提供地下核廢料處置隧道之調查/規劃/施工/監測之參考。
Nuclear energy can bring the comfort and convenience quality for human life, thereby enhancing social and economic development. However, the radioactive waste of used nuclear energy might be a considerable risk for human and natural environment. Therefore, the follow-up domestic management and the final disposal treatment are the most important research topics for the world's advanced countries. Most of current plan is to construct the deep geological disposal facilities in stable environment. Due to the three-dimensional principal stress adjustment, deformation accumulation and plastic zone development during construction process may have great impact on the stability of underground nuclear disposal facilities, the three-dimensional numerical code FLAC3D is adopted to analysising the stress and deformation distribution characteristic in this study.
First of all the numerical excavation process can be separated into Horseshoe Tunnel and Cylinder Disposal Pit, then the different monitoring type of tunnel positions such as tunnel roof (RO), springing point (SP), main tunnel corner (MC), main tunnel floor (MF) are analyzed respectively with 3D stress redistribution and deformation accumulation. Moreover, the further characteristics of obvious stress variation at key round, which including the corresponding safety assessment between 2D and 3D stress path distribution, and spatial principal stress rotation of surrounding rock within the characteristics of stereo projection are mentioned. Finally, the mechanism and characteristics of surrounding rock near excavation surface are synthesized as a reference to investigation/ programming / construction / monitoring for deep geological disposal design.
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