Abstract
Regarding the situation of slurry pressure shield tunneling underneath existing operating railway, the traditional risk assessment method takes the settlement risk of shield tunneling underneath the railroad as the evaluation objective cannot determine the risk development trend. Therefore, a shield tunneling underneath railroad risk evaluation model based on set pair analysis was proposed. Firstly, according to the Slurry Pressure Balance shield construction mechanism, the risk source identification of the shield construction process and railroad operation was carried out, and the index factor system that leads to the settlement risk was formed. The importance of each evaluation index in the model was optimized by rough set, and then a five-element connection number model with objectively improved weights was obtained. Finally, assessed the risk level of railroad settlement caused by the shield tunneling. This model is suitable for the actual construction of a subway shield tunnel, which is consistent with the site survey results and has reference significance for the risk assessment of similar projects.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. U1261121-E0422) and the Key projects of China Railway Corporation (No. 2015Z002).
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Wang, H., Guan, Z. & He, S. Risk Factor Identification and Evaluation on SPB Shield Underneath Existing Railroad Settlement. Geotech Geol Eng 39, 5201–5212 (2021). https://doi.org/10.1007/s10706-021-01825-9
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DOI: https://doi.org/10.1007/s10706-021-01825-9