本研究於台北都會區某一明挖覆蓋工地進行深開挖監測研究，以期了解深開挖進行時，地盤與鄰房之反應關係。監測結果顯示，本研究於目前階段之最大壁體變位與開挖深度之比值約在0.44~0.7%，而壁體變位為深層向內位移型式。最大壁體變位與最大地表沈陷之比值約在0.46~0.57，地表沈陷為凹槽沈陷。另外於軟弱地盤下之沈陷影響範圍可達5倍開挖深度。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，均會隨著凹槽型沈陷而改變傾斜方向；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。

To understand the relationship of ground and adjacent building response due to deep excavation, this study conducted a comprehensive field monitoring during a cut and cover deep excavation. Results indicate that the ratio of the maximum wall displacement to excavation depth is in the range of 0.44 to 0.7%, and the wall deflection is the deep inward movement type. The ratio of the maximum wall displacement to the maximum ground surface settlement is in the range of 0.46 to 0.57, and the ground settlement profile is the concave type. In addition, the influence zone of settlement could reach five times the excavation depth. Building settlement of raft foundation is smaller than ground surface settlement, and the settlement of spread footing is larger than the ground surface settlement. For both raft foundation or spread footing, buildings may change their tilting direction if the ground settlement is the concave type. It must be noticed that building of long rectangular raft foundation could be subjected to significant local angular distortion. Observation results of horizontal strain indicate that the building nearby excavation zone may change from tension strain to compressive strain accompanying ground settlement of the concave type. In addition, this study shows that it is more rigorous to consider angular distortion and horizontal strain simultaneously when evaluating the building safety

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