A Case Study of Thaumasite Sulfate Attack in Tunnel Engineering

Table 3

Information of partial caves in the Dugongling tunnel.

No.	Pile no.	Location	Scale	Photograph	No.	Pile no.	Location	Scale	Photograph
1	YK34 + 796	Arch crown	The length, width, and height are 10 m, 3.5 m, and 4 m, respectively		4	ZK35 + 060	Arch crown	The length, width, and height are 6 m, 6 m, and 1.7 m, respectively
2	ZK34 + 308	Left spandrel	5 m long, 1 m width, 1 m height; The length, width, and height are 5 m, 1 m, and 1 m, respectively		5	ZK35 + 302	Right spandrel	The length, width, and height are 4.8 m, 7.2 m, and 3.2 m, respectively
3	ZK34 + 703	Arch crown	The length, width, and height are 4 m, 5 m, and 1.5 m, respectively		6	ZK35 + 248	Arch crown	The length, width, and height are 3 m, 2 m, and 3 m, respectively