Shield synchronous grouting material and preparation method thereof

The invention relates to the technical field of tunnel construction materials, in particular to a shield synchronous grouting material and a preparation method thereof. The shield synchronous grouting material comprises the following components in parts by weight: 100 parts of mud cake, 8-20 parts of fly ash, 1-4 parts of sodium silicate, 4-16 parts of silicon powder, 20 parts of cement and the balance of water, the water-solid ratio is 1: (0.8-0.95). The preparation method comprises the following steps: weighing a mud cake, crushing, adding water, and stirring to form slurry; weighing the fly ash, the sodium silicate, the silicon powder and the cement according to the mass ratio, adding into the slurry, uniformly mixing, and stirring for 5-10 minutes; the method comprises the following steps: adding an admixture according to actual requirements on site before construction, and fully mixing and stirring, wherein the addition amount of the admixture is 0.15-0.3% of the mass of the cement. The method has the ad