Pipe jacking construction deep hole grouting device and method

The invention belongs to the technical field of pipe jacking construction, and particularly relates to a deep hole grouting device and method for pipe jacking construction. A standing barrel, a thick slurry outlet and a floating cover plate are arranged; bentonite, water and sand are used as raw materials to be prepared into thick slurry, the prepared thick slurry is poured into a standing barrel, a floating cover plate is placed on the inner ring of the top of the standing barrel and floats above the liquid level of the thick slurry, the evaporation rate of water in the thick slurry is reduced, and after the thick slurry stands for 24 hours, the inlet end of a thick slurry pump is communicated with a thick slurry outlet, so that the thick slurry is discharged. Thick slurry is pumped out of the standing barrel and injected into a floral tube in a deep hole grouting hole reserved in the jacking pipe through a pipeline, and the thick slurry is injected into a gap between the jacking pipe and the tunnel; the eva