September 18, 2025BuildingsOpen Access

Numerical Study of Excavation Face Active Instability in Upward Shield Tunneling

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Excavation face support pressure decreases with greater depth ratios, highlighting stability challenges.
Soil failure zones change shape, showing conic forms at depths less than 3 and 'bullet head' shapes at deeper depths.
The numerical model uses ABAQUS and validates results through scaled model tests to ensure accuracy.
This research emphasizes the need for careful analysis of soil behavior in deep tunneling projects.

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Numerical simulations reveal soil failure patterns and support pressure variations in upward shield tunneling.

Li et al. (2025) studied this question.

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