Rethinking the Water Leak Incident of Tunnel LUO09 to Prepare for a Challenging Future

Table 2

Summary of soil properties in the pinhole test.

Specimen no.	Depth (m)	USCS symbol	SPT-N	Sand (%)	Silt (%)	Clay (%)	Water content ω (%)	Liquid limit LL (%)	Plastic index PI
S-14	20.55–21	ML	21	19	76	5	22.4	27	4.1
S-15	22.05–22.5	SM-ML	20	48	52	0	25.6	21.4	0.8
S-16	23.55–24	ML	17	15	82	3	24.4	27.5	1.2
S-17	25.05–25.5	ML	23	4	86	10	19.5	35.2	6.4
S-18	26.55–27	ML	24	20	74	6	21.7	26.5	3.3
S-19	28.08–28.53	CL	16	6	56	38	42.9	43.9	20
S-20	30–30.45	ML	21	15	84	1	25.1	26.1	1.2