In order to improve the driving safety and comfort of long-distance continuous tunnel groups, an analysis method for the operational safety and comfort of long-distance continuous tunnel groups is established based on the Analytic Hierarchy Process Entropy Weight Method and Cloud-Matter Element Theory. Influencing factors of the operational safety and comfort of long-distance continuous tunnel groups were obtained through statistical research on traffic accidents in these tunnels. A judgment matrix was constructed based on expert scoring, and weight indicators were calculated using the Entropy Weight Method. Using the Cloud-Matter Element Theory, the state level of different influencing factors and the correlation degree of the discrimination level were determined. According to the principle of maximum correlation, the safety and comfort level of the long-distance continuous tunnel group were determined. Finally, based on the analysis of the Miaoziwan-Tangjiawan tunnel group on the Yipan Expressway, it was determined that the safety level of this long-distance continuous tunnel group is Level Ⅳ, and the comfort level is also Level Ⅳ, thus corresponding measures should be taken. The research results can provide reference for the design of long-distance continuous tunnel groups.

When the tunnel passes through the fracture zone of the high-temperature hot spring fault, construction personnel will encounter a challenging environment characterized by high temperature and humidity. The construction process involving drilling and blasting is complex, leading to high labor intensity. Regrettably, existing research has overlooked the impact of high-humidity environments on tunnel personnel. To ensure the safety and well-being of construction workers in such conditions, this study establishes revised labor intensity grades for tunnel construction personnel operating in high-temperature, high-humidity environments. Additionally, it develops a human body predicted heat stress correction model based on changes in energy metabolic rates. Furthermore, recommendations are provided regarding safe continuous working times for tunnel construction personnel under these conditions. Field tests were conducted within a hot tunnel environment to validate these findings. Results indicate that when temperatures exceed 30 ℃ and humidity surpasses 70%, labor intensity levels for tunnel construction personnel increase by approximately one grade for every 4 ℃ rise in temperature or 10% increase in relative humidity. When temperatures exceed 38 ℃ with relative humidity exceeding 90%, or when temperatures exceed 40 ℃ with relative humidity over 70%, operations should be halted by construction personnel as per safety guidelines. Notably, field test results demonstrate that the error margin of the human heat stress correction model remains below 5%.