Experimental Study on the Soil Conditioning Materials for EPB Shield Tunneling in Silty Sand

Table 7

Relationship between slurry injection ratio and advance distance.

Advance distance (mm)	0–30	31–60	61–90	91–120	121–150	151–180	181–210	211–240
Injection ratio (%)	0	3–5	7–8	10–12	14–16	18–20	24–26	28–30