Abstract：
By using the Xianfeng Tunnel of Harbin-Mudanjiang High-speed Railway as an example, this paper is
meant to investigate the tunnel temperature field under the combined effect of the variables such as in-tunnel ambient temperature and tunnel surrounding rock temperature after installation of thermal insulation layer. Based on the specific surrounding rock initial temperature and in-tunnel temperature, an appropriate drainage system structure is recommended for the tunnel in cold region, to ensure safety and stability of the drainage system. Under the same condition, according to this study, the temperature values at the measuring points of the drainage system have increased to various extents after thermal insulation layer is installed. Installation of thermal insulation layer will render excellent thermal insulation effect on the water pipe behind the lining, but have limited thermal insulation effect on the side ditch and vertical water pipe. The main difference in drainage system structure is indicated by the temperature
in the center (deep) ditch. Depending on the in-tunnel ambient temperature and tunnel surrounding rock temperature, the drainage system structure of tunnel in cold region can be divided into three zones, including Zone A (without thermal insulation), Zone B (center ditch-thermal insulation) and Zone C (center deep ditch-thermal insulation).
.Study on Effectiveness and Suitability of Thermal Insulation Layer of Different
Tunnel Drainage System Structures in Cold Reg[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(6): 211-219
2023, Vol. 60 