Journal Published Online: 22 July 2024
Volume 52, Issue 5

Calculation Method of Interface Contact Thermal Resistance between Rock and Lining in High Rock Temperature Tunnels Considering the Lithology

CODEN: JTEVAB

Abstract

The disasters caused by the high rock temperature are increasingly prominent. To accurately assess the temperature at the rock-lining interface in high rock temperature tunnels, the rock thermal conductivity evaluation coefficient was introduced to propose a method for calculating interface contact thermal resistance that accounts for the influence of the surrounding rock lithology. This method, based on a disc model, offers precise insights into the thermal resistance between the surrounding rock and the tunnel lining. To validate the efficacy of this method, initial numerical simulations and subsequently performed laboratory experiments across various rock-concrete interfaces were conducted. Laboratory experiments reveal that the interface contact thermal resistance between rock and concrete specimens tends to decrease as temperatures rise from 20°C to 80°C. Moreover, a substantial increase in interfacial contact thermal resistance was observed when dealing with higher-grade surrounding rock (indicating lower quality), reaching up to 111.24 %. The maximum relative error observed in the results of the calculation method is 8.64 %, well within the acceptable range of 15 %, confirming its reliability and practicality for engineering applications. These research findings can serve as a valuable reference for designing support structures in high-temperature rock tunnels and advancing disaster prevention and mitigation technologies.

Author Information

Cui, Guangyao
School of Civil Engineering, North China University of Technology, Beijing, China
He, Ziyang
School of Civil Engineering, North China University of Technology, Beijing, China
Wang, Daoyuan
Hebei Jiaotong Vocational and Technical College, Shijiazhuang, Hebei, China Hebei Provincial Seasonal Frozen Area Highway Service Safety and Early Warning Technology Innovation Center, Shijiazhuang, Hebei, China
Pages: 18
Price: $25.00
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Details
Stock #: JTE20230649
ISSN: 0090-3973
DOI: 10.1520/JTE20230649