Influence Law of Urban Shallow-buried Tunnel Buried Depth on Land Subsidence
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 7
Abstract
Objective The buried depth of tunnel is one of the important factors contributing to land subsidence induced by tunnel construction, especially in urban underground space where subtle environmental changes are prone to cause safety hazards. Therefore, it is necessary to investigate the influence law of urban shallow-buried tunnel buried depth on land subsidence. Method A two-dimensional modified model is proposed，regarding the ratio of tunnel radius to buried depth for land subsidence theoretical solution. Taking a tunnel under construction in Chongqing as example, with model tests, the deformation law of land subsidence under different buried depth conditions is analyzed, and the rationality and feasibility of the proposed modified model are verified in predicting land subsidence. Result & Conclusion With an increase in tunnel buried depth, the overall trend of land subsidence decreases, and the width of subsidence trough increases gradually, while the maximum subsidence amount along the tunnel axis decreases gradually. Compared to the original theoretical solution and Peck′s formula solution, the modified subsidence prediction model aligns closer with the curves obtained from tests. Moreover, the modified model demonstrates better applicability under different tunnel buried depth conditions. During the construction of shallow-buried tunnel, it is recommended to expand the scope of control protection zone as tunnel buried depth increases.
Authors and Affiliations
Yuanjun CAO
Keywords
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- EP ID EP742591
- DOI 10.16037/j.1007-869x.2024.07.007
- Views 13
- Downloads 0
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