Author:
Xu Yuping,Liu Yang,Qiu Wenge
Abstract
AbstractTo solve the problem of freezing damage in cold-region tunnels, this study proposed a rubber airbag interlayered composite lining system, and tested its performance of buffering, pressure adjustment, waterproofing, and heat preservation by simulating a low-temperature environment in an artificial freezing chamber. The experiment results show that the frost-heaving force exerted on the lining can always be lower than 1.69 kPa by constantly adjusting the airbag pressure, and the maximum frost-heaving force can reach 28.25 kPa without the airbag. In addition, the airbag also has good waterproof performance. Finally, the airbag can significantly improve the temperature field of the surrounding rock and reduce the freezing depth (6.75 cm < 17.25 cm). The insulation effect of the airbag is positively correlated with its thickness and negatively correlated with the thermal conductivity of the filling gas. The insulation effect of CO2 is better than that of air. The rubber airbag interlayered composite lining system provides a new scheme for freezing damage control in cold-region tunnels.
Funder
the Big Data-driven Structural Disasters Prediction and Maintenance in Hazardous Geological Regions of Subsea Tunnels
Publisher
Springer Science and Business Media LLC
Reference29 articles.
1. Zhou, Y., Liu, M. & Zhang, X. Frost mitigation techniques for tunnels in cold regions: The state of the art and perspectives. Atmosphere 14(2), 369. https://doi.org/10.3390/atmos14020369 (2023).
2. Liu, X. G. Study on thermal insulation of tunnels in permafrost soil on Qinghai-Tibet railway. Tunnel Constr. 30(3), 225–230 (2010).
3. Sun, H., Shi, Z.H. et al. Technology of waterproofing and drainage of Huashan tunnel in high cold region. In Progress in Safety Science and Technology (Vol IV) B Proc. of the 2004 International Symposium on Safety Science and Technology, 1093–1098 (Science Press, 2004).
4. Cui, S. A. et al. Nano-modification effect on the pore characteristics and the water multiscale transport properties of concrete in winter construction of tunnel engineering. Cement Concr. Compos. 137, 1–15. https://doi.org/10.1016/j.cemconcomp.2023.104933 (2023).
5. Lai, Y. et al. Study of methods to control frost action in cold regions tunnels. J. Cold Reg. Eng. 17(4), 144–152. https://doi.org/10.1061/(ASCE)0887-381X(2003)17:4(144) (2003).