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This study explores the deformation patterns of existing underground structures impacted by super-large-diameter tunnel undercrossing.

January 23, 2026Applied SciencesOpen Access

Analysis of the Coupled Deformation Pattern of Existing Underground Structural Clusters Due to Undercrossing by a Super-Large-Diameter Shield Tunnel

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Analysis reveals how shield tunneling affects underground structures, indicating risk control measures are needed for safety.

This study explores the deformation patterns of existing underground structures impacted by super-large-diameter tunnel undercrossing.
Simulation of the Shuanghua Road Tunnel section using FLAC3D 7.0
Assessment of settlement and deformation in relation to existing structures
Comparative analysis during single and dual-line tunnel crossings
Maximum settlement of the metro tunnel reached 47.7 mm during undercrossing
Cross-sectional deformation of existing structures is influenced by the shield approach and recovers after tunneling
Maximum torsion angle recorded at approximately -0.016° during initial underpassing event

Li et al. (2026) studied this question.

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