Research on the Reuse of Discharged Soil from EBP Shield Tunnels in Synchronous Grouting Material

Table 11

Reduction coefficient of longitudinal grouting pressure.

Construction stage	The circumferential grouting pressure after longitudinal reduction/MPa					Reduction coefficient
Initial grouting pressure	0.1	0.14	0.18	0.22	0.26	0.3
Off ring for 0∼8 h	0.08	0.112	0.144	0.176	0.208	0.24
Off ring for 8∼16 h	0.04	0.056	0.072	0.088	0.104	0.12
Off ring for 16∼24 h	0.02	0.028	0.036	0.044	0.052	0.06