Study on the Large Deformation Characteristics and Disaster Mechanism of a Thin-Layer Soft-Rock Tunnel

Table 3

Relative content of different minerals in the clay mass.

No.	Relative content of clay minerals (%)							Mixed layer ratio (%S)
	S	I/S	I	K	C	C/S	Py	I/S	C/S
1	—	16	44	10	25	—	5	10	—
2	3	16	47	9	25	—	—	5	—
3	2	12	46	8	32	—	—	5	—
4	—	22	42	13	18	—	5	10	—
5	—	20	37	11	27	—	5	10	—
6	1	15	50	9	25	—	—	5	—

Note. Ta: talc; Py: pyrophyllite; Se: serpentine; V: vermiculite; I/V: illite/vermiculite mixed layer; S: smectite; I/S: illite mixed layer; I: illite; K: kaolinite; C: chlorite; C/S: chlorite mixed layer.