Field and numerical investigation demonstrates effective deformation control via ultra-high-performance concrete lining in fault-crossing tunnels, indicating improved structural reliability.
During the construction within active fault zones in tunnels, challenges like collapse and deformation may arise. This study is grounded in field experiments, aiming to analyze the stress and deformation characteristics of Dongmachang No.1 tunnel (DMT-1). Leveraging machine learning techniques, the research predicts the tunnel's settlement values over the following two years. Furthermore, numerical simulations assess the support reliability of ultra-high-performance concrete (UHPC) lining, validated through on-site monitoring. Findings reveal that significant geostress and the presence of active fault zones intersecting the deeply buried DMT-1 lead to deformation manifestations such as primary support deformation, arch cracking and uplift, and secondary lining cracking. The proposed UHPC lining demonstrates effective tunnel reinforcement, playing a pivotal role in the sustainable development of tunnel infrastructures.
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Zheng et al. (2026) studied this question.
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