Shield Cutting Pile-Group Implementation Effects on the Superstructure

Table 3

Secondary grouting slurry ratio table.

Material name	Material parameters	Proportion	Coagulation time (s)	28 days strength (Mpa)
Cement	P.O 42.5	Water : Water glass : Cement slurry = 3 : 1:1 (volume ratio)	30	2.6
Water glass	Baumé degree: 30∼35, modulus: 2.8∼3.1