Distribution Features of the Minimum Rock Cover Thickness of the Surrounding Rock Self-Stability of the Metro Tunnel in the Soil-Rock Dualistic Stratum

Table 6

Statistics of the soft soil thickness.

Min. (m)	Low position (m)	Lower quartile (m)	Median (m)	Upper quartile (m)	High position (m)	Max. (m)	Average (m)	SD (m)
0.0	0.0	5.0	10.0	14.8	29.8	38.0	10.2	6.35