Author(s): Yonglai Zheng; Jiaji Chen; Jiayu Zhong

Linked Author(s):

Keywords: Hydraulic structure numerical simulation diversion tunnel excavation and support long-term stability analysis

Abstract: The long-term stability of foundations for hydraulic structures, rock slopes, and underground caverns is crucial for engineering construction and operation. Studying the rheological properties of rock masses is fundamental to solving this issue. Using the excavation of the auxiliary traffic tunnel of the Jinping II Hydropower Station as the research subject, we investigated the rheological behavior of deep rock masses under different stress states through numerical simulation of the compressive creep test characteristics of the tunnel's surrounding rock (green schist). By comparing the similarities and differences of results obtained using different constitutive models, we identified the model most suitable for the green schist used in the experiments. This model was then applied to the numerical simulation of the auxiliary tunnel excavation at the Jinping II Hydropower Station, revealing characteristics in stress, strain, displacement, and other simulation results. The rheological effects on the long-term impact of deep engineering were analyzed, providing a numerical simulation basis for exploring the long-term stability of deeply buried tunnels.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P2051-cd

Year: 2025