Reinforcing material for ancient buildings, preparation method and grouting reinforcing method

The invention relates to the technical field of building repairing and reinforcing, and particularly discloses a reinforcing material for ancient buildings, a preparation method and a grouting reinforcing method. The reinforcing material comprises the following components in parts by weight: 90-110 parts of Portland cement, 67.5-82.5 parts of water, 4-5 parts of water glass with the concentrationof 40 Baume degrees and 0.9-1.1 parts of calcium lignosulphonate. According to the preparation method, during blending, the materials are mixed and stirred uniformly, and an additive is added gradually; during reinforcement, grouting holes are reasonably formed, a grout is injected through grouting pipes, and the reinforcement effect can be ensured by controlling the injection process. The reinforcing material disclosed by the invention is simple in composition, easy to prepare and good in permeability after being prepared, and can reach a reasonable range under a foundation, so that the integrity of a bottom layer at