Numerical Simulation of the Creep Behavior of Beishan Deep Granite Tunnel under the Coupling Thermal - Stress Field

This study conducts a three-dimensional numerical simulation of the creep behavior of deep granite tunnels at 560 meters underground during the coupled thermal-stress process, with an aim to elucidate the effect of the temperature and stress fields on the creep behavior of these deep hard rock tunne...

Full description

Saved in:
Bibliographic Details
Published in:KSCE journal of civil engineering 2024, 28(4), , pp.1546-1553
Main Authors: Wang, Jiawei, Wang, Ju, Zhou, Zhichao, Wu, Peng, Sun, Haoran, Dou, Jiale, Li, Nan, Duan, Xianzhe
Format: Article
Language:English
Subjects:
Civil Engineering
Creep (materials)
Engineering
Geotechnical Engineering & Applied Earth Sciences
Granite
Industrial Pollution Prevention
Mathematical models
Simulation
Solifluction
Stress distribution
Temperature distribution
Temperature fields
Thermal coupling
Thermal stress
Tunnel Engineering
Tunnels
Underground structures
토목공학
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study conducts a three-dimensional numerical simulation of the creep behavior of deep granite tunnels at 560 meters underground during the coupled thermal-stress process, with an aim to elucidate the effect of the temperature and stress fields on the creep behavior of these deep hard rock tunnels. A 100-h creep period was set, and the mechanical structure of the experimental chamber was accurately replicated at a 1:1 scale, considering the actual mechanical structure of the granite tunnels in the Beishan underground laboratory. The simulation results can demonstrate that: 1) The maximum stress at 90°C and 50°C are 2.86 and 1.91 times than that at 23°C, respectively, demonstrating significant strain accumulation in the deep granite tunnels at the surface. This phenomenon can primarily be attributed to the thermal stress resulted from the coupling between temperature and stress. 2) The maximum creep at 90°C and 50°C is 16 and 3.5 times than that at 23°C. Under the influence of thermal coupling, the creep increases significantly with increasing temperature, indicating that temperature is an important factor influencing creep in granite. 3) Compared with variations in the stress field, the temperature field emerges as the most critical factor influencing granite creep.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-024-1452-2