Support for disposing disengagement of arch feet of tunnel arch center

The utility model discloses a support for handling disengagement of an arch foot of a tunnel arch frame. The support comprises a base, a top support and a height-adjustable connecting piece arranged between the base and the top support. The top support is arranged at the top of the connecting piece and connected with the arch frame, and the base is arranged at the bottom of the connecting piece and connected with a tunnel excavation face; by adjusting the length of the connecting piece, the support is always supported between the tunnel excavation face and the arch frame, and the arch springing of the arch frame is prevented from disengaging. The height-adjustable connecting piece is arranged between the top support and the base, effective support can be provided for the arch feet of the arch frame, and when the support continuously sinks due to insufficient bearing capacity of a foundation, the height of the support can be regularly adjusted to enable the support to keep enough vertical supporting force, and