| Issue |
E3S Web Conf.
Volume 198, 2020
2020 10th Chinese Geosynthetics Conference & International Symposium on Civil Engineering and Geosynthetics (ISCEG 2020)
|
|
|---|---|---|
| Article Number | 02014 | |
| Number of page(s) | 4 | |
| Section | Structural Engineering Monitoring, Control, Repair and Reinforcement | |
| DOI | https://doi.org/10.1051/e3sconf/202019802014 | |
| Published online | 26 October 2020 | |
Research and Analysis on the Supporting Structure of the Second Lining of the Tunnel in the Phyllite Stratum
Jiangxi Provincial Expressway Investment Group Co., Ltd., Nanchang 330200
* Corresponding author: 962840920@qq.com
The reasonable construction of the secondary lining structure of the tunnel is an important link to ensure the stability of the surrounding rock of the tunnel. Taking a phyllite stratum tunnel project in Jiangxi as the background, the Flac3D finite difference software was used to numerically simulate and analyze the supporting structure of the secondary lining. The impact of support timing on surrounding rock stress. The calculation results show that with the progress of the construction step, the main period of the displacement of the vault is after the excavation of the upper section of the tunnel before the upper section support; The plastic zone of the surrounding rock changes obviously, especially above the tunnel, and finally the plastic zone develops to the ground; the stress of the surrounding rock shows a decreasing trend with the increase of the time of the secondary lining. The research results can provide certain guiding significance for the construction of the second lining of the tunnel under similar geological conditions.
© The Authors, published by EDP Sciences 2020
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