Phenomenon and Critical Conditions of Chamber Soil Sliming during EPB Shield Tunneling in Water-Rich Weathered Diorite: Case Study of Jinan Metro, China

Table 4

Reference value and change range of each parameter.

Parameter	(m)	Α	t (h/ring)	k (m/s)
Benchmark value	16	1/2	4	10^–5
Variation range	7∼16	1/3∼2/3	4∼8	10^−7∼10^−5