Study of the Corrosion Characteristics of Tunnel Fissures in a Karst Area in Southwest China

Table 3

Karst ratio of the Wulong tunnel.

The starting position of each section from the tunnel inlet (m)	The length of the section (m)	Karst ratio
0~3396	3396	0.2
3396~3892	496	0.4
3892~5276	1384	0.5
5276~7276	2000	0.3
7276~9418	2142	0.2