There are many challenges in the construction of large-diameter tunnels, such as low efficiency of manual construction and poor safety. To solve the problems, a multi-functional arch installation machine, an auxiliary arch installation machine and matching devices of fabricated arches are developed. A new mechanized construction technology of fabricated arches is put forward. The numerical calculation and laboratory experiment are carried out on the mechanics mechanism of the I-steel arch in the mechanized construction process. The results show that the maximum stress value appears at the arch skewback and vault. In order to reduce the deformation of the key parts in the process of the arch installation, the skewback is reinforced to increase the local strength. In addition, the method of the manipulator with splint to lift the arch is proposed to reduce the stress concentration of the arch vault. Based on the above research, the application for mechanized construction of the fabricated arch is carried out on site, and both of the construction efficiency and the safety are significantly improved.

大直径隧道的建设面临许多挑战，例如人工施工效率低和安全性差。为了解决该问题，开发了一种多功能的拱门安装机，辅助拱门安装机以及装配好的拱门的配套装置。提出了一种新型的拱门机械化施工技术。对工字钢拱在机械化施工过程中的力学机理进行了数值计算和室内实验。结果表明，最大应力值出现在拱背和拱顶处。为了减少拱形安装过程中关键零件的变形，加强了后弯以增加局部强度。此外，提出了用夹板抬起足弓的机械手方法，以减少足弓拱顶的应力集中。在以上研究的基础上，现场进行了人工拱的机械化施工，大大提高了施工效率和安全性。