Analyzing tunnel excavation behavior involves large deformation issues. For this reason, large deformation analysis method is required to rigorously investigate the actual effect of excavation on surrounding ground. Two major numerical approaches capable of considering large deformations are applied to investigating the effect of tunnel boring machine excavation: coupled Eulerian-Lagrangian (CEL) and the automatic remeshing after small strain approach. The theoretical basis and application of the methods will be discussed before their relative performance is evaluated through the ground response due to TBM excavation. The ground response will be quantified by estimating the range of the excavation damaged zone (EDZ). By comparing the results, the range of the size of the EDZ will be suggested along the vertical and horizontal direction along the TBM advancement. Based on the computed results, it was found that the size of EDZ around the excavation surface and the tendencies was in good agreement among the two methods. Numerical results clearly show that the size of the EDZ around the tunnel tends to be bigger for harder rocks. The size of the EDZ is found to be direct proportional to the tunnel diameter, whereas the depth of the tunnel is inversely proportional due to higher confinement stress around the excavation surface.

分析隧道开挖行为涉及大变形问题。为此，需要采用大变形分析方法，严格考察开挖对周围地基的实际影响。两种能够考虑大变形的主要数值方法被应用于研究隧道掘进机开挖的影响：耦合欧拉-拉格朗日 (CEL) 和小应变方法后的自动重新网格划分。在通过TBM开挖引起的地面响应评估其相对性能之前，将讨论这些方法的理论基础和应用。地面响应将通过估计开挖损坏区 (EDZ) 的范围来量化。通过比较结果，沿TBM推进沿垂直和水平方向建议EDZ的大小范围。根据计算结果发现，两种方法在开挖面周围的EDZ大小和趋势非常吻合。数值结果清楚地表明，对于较硬的岩石，隧道周围的 EDZ 的大小往往更大。发现 EDZ 的大小与隧道直径成正比，而由于开挖面周围的约束应力较高，隧道的深度成反比。数值结果清楚地表明，对于较硬的岩石，隧道周围的 EDZ 的大小往往更大。发现 EDZ 的大小与隧道直径成正比，而由于开挖面周围的约束应力较高，隧道的深度成反比。数值结果清楚地表明，对于较硬的岩石，隧道周围的 EDZ 的大小往往更大。发现 EDZ 的大小与隧道直径成正比，而由于开挖面周围的约束应力较高，隧道的深度成反比。