潛盾工法可降低開挖對鄰近結構物及交通環境所造成之衝擊，且具有高效率與安全施工之特徵，故近年來潛盾工法廣泛被國內工程界所使用。本研究採用有限元素法，針對三維單隧道開挖問題進行分析，分析時採用ABAQUS有限元素分析程式作為數值分析工具。分析內容包括：隧道開挖所造成之地表沉陷、塑性區之分佈以及襯砌彎矩與軸力之分佈等。 本研究亦將數值分析之結果與離心模型試驗之結果相互比較，藉此驗證數值分析模型的正確性。此外，本文也針對深徑比（C/D）以及未襯砌長度與隧道直徑比（P/D）等參數之影響進行研究。 Shield tunneling has been widely used on tunnel construction due to its relatively minor mimpact on surrounding environment. In this study, finite element method is applied to analyze three-dimensional tunneling problems. The analyses contain surface settlement due to tunneling, yielding regions caused by tunneling, and the distribution of moment and axial force in tunnel lining. The numerical results from ABAQUS were compared with the experimental results from lab centrifuge model tests. This study also investigated the effect due to (C/D)ratio, and (P/D)ratio.
