Abstract
Segment crack and damage is one of the most common diseases in shield construction. Based on a practical project, the cause of crack damage, the safety of the damaged segment structure and its relative repairing technology were studied concretely by means of field investigation, numerical simulation and construction monitoring. The results show that the soil erosion, caused by water leakage in the project, is the main reason for the stress concentration and local crack of shield segments. At the same time, after grouting reinforcement inside and outside the tunnel and local segments repairing, there are no new cracks appear and develop, the monitoring indicators also tends to be stable, the segment structure is safe, and can meet the needs of subsequent process safety construction. It can be seen that the reinforcement and repair measures taken are effective and can be referenced for similar situations.
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Acknowledgements
Projects funded by the National Natural Science Foundation of China (No. 51508575), the Natural Science Foundation of Hunan Province, China (No. 2018JJ3657), and The Education Department Science and Technology Research Project of Jiangxi Province, China (No. GJJ171292) are gratefully acknowledged.
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Haorong, C., Limin, P., Mingfeng, L. et al. Causes Analysis, Reinforcement and Repair Technology of Segment Crack and Damage During Shield Tunnelling Process: A Case Study. Geotech Geol Eng 37, 765–773 (2019). https://doi.org/10.1007/s10706-018-0648-y
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DOI: https://doi.org/10.1007/s10706-018-0648-y