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

<div>Daily mean air temperature changes at both outsides of the tunnel entrance and exit with the date increasing from January 2017 to April 2018.</div>

Advances in Civil Engineering

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Figure 7

Figure 7: Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China 

Figure 7 | Investigation of the Insulation Effect of Thermal Insulation Layer in the Seasonally Frozen Region Tunnel: A Case Study in the Zuomutai Tunnel, China 