Fixed-point grouting auxiliary device for tunnel construction

The invention belongs to the technical field of grouting, and discloses a fixed-point grouting auxiliary device for tunnel construction. Comprising a grouting vehicle and universal wheels, a liquid storage barrel is fixedly connected to the top end of the grouting vehicle, a liquid outlet pipe is fixedly connected to the outer side of the liquid storage barrel, a water suction pump is installed between the liquid storage barrel and the liquid outlet pipe, and the water suction pump is used for pumping liquid in the liquid storage barrel to the interior of the liquid outlet pipe. According to the device, through the structural design of a magnetic attraction mechanism, when slurry in the grouting pipe circulates, the magnetic attraction mechanism operates to drive a clamping rod to extrude a hollow pipe through a lifting plate, the function of fixing the grouting pipe is achieved, when circulation of the liquid in the grouting pipe is finished, it is indicated that grouting is finished, the grouting pipe needs