Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China

Figure 12

Changes of temperature inside lining at the tunnel vault, waist, and side wall in the sections K628 + 541, K628 + 602, and K628 + 687 from January 2017 to April 2018. (a) At vault. (b) At waist. (c) At side wall.

(a)

(b)

(c)