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

Figure 8

Daily mean temperature changes of the air, thermal insulation layer, and lining at the side wall in the typical monitoring sections with the date increasing from January 2017 to April 2018. (a) Section K628 + 541. (b) Section K628 + 900. (c) Section K629 + 091. (d) Section K631 + 490. (e) Section K630 + 690. (f) Section K631 + 441.

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