：在盾构法施作联络通道的过程中，由于主隧道的结构体系发生变化，衬砌内力发生重分布，对主隧道结构稳定不利。为了解结构安全性以及结构响应，开展盾构法联络通道的结构受力足尺试验进行模拟。试验采用7环管片错缝拼装进行模拟，在模拟真实水土压力荷载后，通过运用盾构直接切削管片，模拟真实盾构法联络通道施工过程中的出洞过程，得到如下结论： 1）通过模拟的方法得出该工法施工过程中的关键工况节点； 2）通过模拟得出隧道在整个切削过程中各环的收敛变形整体性较好，工法是安全的； 3）试验过程中，除切削位置以外的其余位置发生内力重分布，内力重分布的过程与工况变化过程息息相关。

During the construction of the connection gallery by shield method, the structural system varies and the lining stress redistributes, which is bad for the stability of main tunnel. In order to lean the safety and response of the structure, a fullscale experimental study on structural mechanism of the connection gallery by shield method is carried out. In the experiment, the 7 ring segments are assembled at different joints for simulation. After simulating the real soil and water pressure load, the exit process of the real connection gallery by shield method is simulated by directly cutting the segments with shield. The results show that: （1） Through the simulation, the key working condition nodes in the construction process are obtained. （2） Through the simulation, it is concluded that the convergence deformation of each ring in the whole cutting process is good and the construction method is safe. （3） During the experiment, the internal force redistribution occurs at all positions except the cutting position, and the process of internal force redistribution is closely related to the variation process of working condition.