The results indicate that surface subsidence may arise from dilapidating segments and constructing middle brace of continuous-double arch.

另外，拆除管片并开挖时、施做中墙时均会引起地面较大的沉降。

The construction plan of double-joined arch is validated using numerical simulation when dilapidating segments to construct single connecting tunnel between two shield-driven tunnels in this paper.

应用数值模拟方法研究了在盾构法修建隧道的基础上拆除管片修建渡线隧道中双联拱段方案的可行性，研究表明双联拱方案是可行的；