Abstract
In recent decades, numerous tunnels have been built in the cold region of China. However, the temperature field of topographically biased tunnels in the monsoon freeze zone has not been sufficiently studied. In this study, we monitored the temperature of the surrounding rock in two topographic bias sections of the Huitougou Tunnel and analyzed the results by fitting them to the monitoring results. The results showed that the temperature of the surrounding rock on both sides after tunnel excavation varied periodically in an approximate triangular function. As the distance from the cave wall increased, the annual average temperature of the surrounding rock did not change significantly, the amplitude decreased, and the delay time increased, while the annual maximum temperature decreased, and the annual minimum temperature increased. The heat generated by blasting, the heat of hydration of the primary and secondary lining, and the decorated concrete all caused a significant increase in the temperature of the surrounding rock within 4 m for a short period of time. Both construction and topographic factors led to asymmetry in the distribution of the surrounding rock temperature in different ways. The results of this paper are intended as a reference for other studies on temperature in deviated tunnels.
Highlights
With the rapid growth of China’s economy, the number and total length of the tunnels constructed in China have increased dramatically [1]
There are many problems related to the construction and operation of tunnels, and the study of tunnel temperature field has been the focus of many scientists and engineers [2,3,4,5]
Research on tunnel temperature fields is mainly conducted through field monitoring, theoretical calculations, numerical simulations, and model experiments [9,10,11]
Summary
With the rapid growth of China’s economy, the number and total length of the tunnels constructed in China have increased dramatically [1]. Research on tunnel temperature fields is mainly conducted through field monitoring, theoretical calculations, numerical simulations, and model experiments [9,10,11]. He et al [12] monitored the temperature and humidity in a sub-sea tunnel. When the surface of the tunnel section is inclined, the temperature field of shallow buried bias tunnels located in cold regions are not symmetrically distributed along the tunnel axis. Long-term temperature monitoring was conducted for both deep and shallow buried biased tunnel cross-sections in the Huitougou Tunnel. This paper completes the study of the distribution of temperature fields in topographic bias tunnels in cold regions and offers guidance for the freeze protection of such tunnels
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call