Geoenvironmental Disasters

Table 5 Hydraulic conductivity of pre- and post-grouting

From: Experimental investigation on grout propagation in poured aggregates for controlling water inrush in tunnels with flowing water

Trial no.	Hydraulic conductivity (cm/s)		Reduction rate (%)
Trial no.	Pre-grouting	Post-grouting	Reduction rate (%)
1	0.63	0.27	56.9
2	0.32	0.12	61.7
3	0.25	0.06	75.8
4	0.34	0.05	86.0
5	0.59	0.14	76.2
6	0.50	0.13	74.3
7	0.36	0.07	81.0
8	0.42	0.13	69.0
9	0.49	0.10	79.8
10	0.54	0.09	82.9
11	0.26	0.10	62.7
12	0.53	0.18	65.6
13	1.28	0.32	75.2
14	1.16	0.36	69.3
15	1.26	0.43	66.3
16	1.06	0.46	56.3

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