Device for tunnel maintenance

The invention provides a device for tunnel maintenance, and belongs to the technical field of tunnel operation and maintenance. According to the technical scheme, the device comprises a construction platform and a knocking-out mechanism arranged on the construction platform; the knocking-out mechanism comprises a rack, the rack comprises a bottom plate arranged on the construction platform and a vertical plate arranged on the bottom plate, a crank is rotatably arranged on the vertical plate, a crank shaft of the crank extends out of the vertical plate and is connected with a driving device through a transmission mechanism, a swing rod is rotatably arranged at the other end of the crank, the other end of the swing rod extends out of the construction platform and is provided with a steel chisel, the end, close to the steel chisel, of the swing rod is connected with the vertical plate through a spring, a limiting block is rotatably arranged on the vertical plate and located above the swing rod, under the action