中文摘要：

为了探讨近距离双孔并行盾构隧道地层位移场分布规律,以随机介质理论和隧道断面的非均匀收敛模式为基础,推导了双孔隧道地层位移的理论计算公式,采用提出的方法探讨了双孔隧道在不同位置的关系及埋深条件下的地层位移分布规律,并结合实际工程验证了理论方法的有效性。研究表明：隧道上方地层内部位移以竖向沉降为主,不同深度处的地层位移大小、影响范围以及分布形式并不相同;与浅部地层位移相比,深部地层位移更大,但位移影响范围更小,且地层沉降槽的双峰特征更加明显;倾斜对齐的双孔隧道的周围地层水平位移分布呈现非对称性,土体发生不同方向的水平剪切变形并会对该区域内的地下结构造成附加剪切作用。

英文摘要：

In order to discuss the distribution of stratum displacement of double-tube parallel shield tunnel due to the excavation, based on the stochastic medium theory and non-uniform convergence mode of tunnel section, a formula of stratum displacement for double-tube parallel shield tunnel is derived, and the proposed method is adopted to discuss the distribution of stratum displacement of double-tube tunnel under different location configurations and buried depths. Furthermore, the validity of the proposed method is verified through practical engineering. It is found that （1） the stratum inner displacement above tunnel is vertical settlement mainly, and the values, influence ranges and distributions of stratum displacement are different in different stratum depths above the tunnel; （2） compared with the stratum displacement in shallow depth, the stratum displacement in deeper depth is larger, while its influence range of stratum deformation is smaller and the characteristics of ＂double-peak＂ of stratum settlement trough is more obvious ; （3） for the configuration of the double-tube tunnel with inclined alignment, the horizontal displacement of soil mass distributed asymmetrically; （4） there is a horizontal shear deformation of soil mass in different directions, and an additional shear force would be applied to the underground structure within this zone during the tunnels＇ excavation.