中文摘要：

以武汉地铁3号线区间隧道工程为背景，针对右线盾构超越左线盾构施工这一工程实际，通过数值模拟与现场监测相结合的方法，研究施工过程中地表横向、纵向沉降变化以及深层土体的横向水平位移变化。研究结果表明：地表沉降与沉降槽宽度在右线盾构通过后明显增大；纵向地表在右线盾构通过前先小幅沉降，右线盾构通过后迅速沉降，当右线盾构离开监测断面40m后沉降趋于稳定；不同深度土体的横向水平位移也不相同，最大位移发生在隧道埋深一半左右。因此，盾构超越施工对先建隧道的影响非常明显。

英文摘要：

Taking the tunnel engineering of Wuhan metro Line 3 as the background, and according to the particular situation of the right-line shield tunnel surpassing the left- line, numerical simulation and on-site monitoring are com- bined to study the horizontal and vertical ground settle- ment, as well as the deep soil horizontal displacement. The research indicates that the ground settlement and settlement slot width increase significantly after the right-line shield getting through, the ground would go down before the right-line shield arrives and then go down rapidly, the set- tlement would remain stabile when the right shield leaves 40 m away from the monitoring section. The horizontal displacement is not the same at different soil depths, the maximum displacement locates at half depth of the tunnel. It＇s clear that the surpass construction has great impact on the built tunnels.