Anti-lifting device for grouting under tunnel bottom plate

The invention provides a tunnel bottom plate lower grouting anti-lifting device, and relates to the technical field of constructional engineering machining, the tunnel bottom plate lower grouting anti-lifting device comprises a rail car, a drilling device, a hole cleaning device and a grouting device, the drilling device, the hole cleaning device and the grouting device are sequentially arranged on the rail car from left to right at equal intervals, and fixing frames are fixedly installed at the upper end of the rail car at equal intervals; telescopic air cylinders are symmetrically and fixedly connected to the upper end of the fixing frame, the output ends of the telescopic air cylinders penetrate through the fixing frame in a sliding mode, and in addition, the following problems can be solved that a, according to an existing anti-lifting device for grouting under the tunnel bottom plate, the pouring depth cannot be controlled, and therefore the grouting height is too high or too low easily. And b, an existi