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| 研究生： |
王明輝 Ming-Hui Wang |
|---|---|
| 論文名稱： |
長條形開挖引致之地盤變位及鄰房反應之研究 Ground Displacement and Adjacent Building’s Response due to Long-shape Excavation |
| 指導教授： |
林宏達
Horn-Da Lin |
| 口試委員: |
王建智
none 褚炳麟 none 歐章煜 none |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
| 論文出版年： | 2006 |
| 畢業學年度： | 94 |
| 語文別： | 中文 |
| 論文頁數： | 197 |
| 中文關鍵詞： | 地盤變位 、鄰房反應 、水平應變 、開挖 |
| 外文關鍵詞： | Ground Displacement, Adjacent Building's Response, exvacation |
| 相關次數： | 點閱：221 下載：8 |
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本研究針對一個捷運車站長條形基地，以現地監測方法研究地盤與鄰房之反應關係。監測結果顯示，本研究於開挖完之最大壁體變位與開挖深度之比值約在0.42~0.7%，而壁體變位為深層向內位移型式，地表沉陷為凹槽型。最大壁體變位與最大地表沈陷之比值約在0.46~0.57。拆撐引致之壁體變位佔總位移量相當小。筏基建物之沈陷小於地表沈陷，而獨立基腳沈陷則略大於地表沈陷。開挖引致的鄰房傾斜率及角變量，不論是筏式基礎或獨立基腳，均會隨著沉陷槽發展而改變傾斜方向；而長條型筏基建物需要注意可能產生過大的局部角變量。由水平應變觀測結果發現，在靠近開挖區之建物可能隨著凹槽型沈陷由拉應變轉變成壓應變。此外本研究亦發現，同時考慮角變量與水平應變將可使建物安全評估更加的嚴謹。
A long-shape excavation of a MRT station was carefully monitored to study the response of the ground and adjacent buildings caused by the process of deep excavation. In-situ measured results indicate that the maximum ratio of the wall displacement to the excavation depth is in the
range of 0.42％ to 0.7％. The wall deflection is the deep-inward-movement type; and the ground surface settlement is the concave type. The range is 0.46 to 0.57 for the maximum ratio of the wall displacement to the maximum ground surface settlement . The amount of the wall displacement is very limited due to strut removed. The submergence of the raft-foundation building is smaller than the ground surface settlement; the settlement of spread footing is larger than the ground surface settlement. However, both raft-foundation or spread footing, the direction of building tilting and angular distortion may change if the settlement is the concave type. Also it must be noticed that buildings of long-shape and raft-foundation could be subjected to significant local angular distortion. Observation from the horizontal strain measurement indicates that the building nearby the excavated zone may change from tension strain to compressive strain accompanied by the concave type ground submergence. In addition, this study shows that it is more rigorous to consider both angular distortion and horizontal strain simultaneously for the building safety evaluation.
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