The invention discloses light
slurry for shield synchronous grouting. The light
slurry comprises the following components in parts by weight: 200 to 300 parts of
cement, 50 to 160 parts of light aggregate, 600 to 800 parts of
fly ash, 1.0 to 1.6 parts of a water
reducing agent, 10 to 16 parts of a flocculating agent, 15 to 25 parts of a thickening
time control agent and 600 to 750 parts of water.Compared with the prior art, the volume weight of the light
slurry for shield synchronous grouting is 1.0-1.4 kg / m<3>; the volume weight is far less than that of existing synchronous
mortar, the lightslurry cannot will not quickly sink to a bottom
cushion supporting
pipe sheet or be taken away by the circulating slurry at the slurry
discharge port below, thereby greatly reducing the loss amount after the synchronous slurry is injected, obviously improving the shield synchronous grouting effect, and effectively preventing the
pipe sheets from floating upwards in the shield construction in a water-rich section. Besides, the light slurry for shield synchronous grouting is not dispersed in water, the 3d
compressive strength in water can reach 0.5 MPa or above, the final
setting time is shorter than 15 h, the light slurry is particularly suitable for filling building gaps between
pipe sheets and surrounding rock in tunnel synchronous
shield tunneling construction, and the
engineering quality can be better guaranteed.