Study on Cause Analysis and Treatment Measures of Lining Cracking and Ballast Bed Freezing at Tunnel Portal in Seasonally-Frozen Regions
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The purpose of this study is taking the ZEST tunnel of Xilin hot-Ulanhot Railway in Inner Mongolia province of China as an example to investigate the cause and treatment measures of lining cracking and ballast bed freezing at tunnel portal in seasonally-frozen regions. Field investigation method was used to investigate the characteristics of lining cracking and ballast bed freezing in winter. The results show that the longitudinal cracks in the side wall are symmetrical and located in the middle of the wall. The longitudinal cracks have obvious seasonal characteristics, which mainly occur in winter, and the width of cracking was alternatively varied and broadened year by year, of which the process proved to be irreversible. The number of cracks and the width and length of the cracks all have the trend of further development in the last year. Numerical calculation method was used to study the internal force change law of the lining structure of the ZEST tunnel under seasonal frost heaving force. The results show that the lining cracking is mainly caused by the frost heaving force load. Based on the above analysis results, the treatment measures for the frost heave cracking, ballast bed freezing and the leakage of water leakage during the spring thawing period are proposed, the remediation measure proposed is quite effective and the problems such as cracking, ballast bed freezing and water leaking of tunnel lining are completely solved.
KeywordsRailway tunnel Seasonally-frozen region Silty clay Frost heaving force Lining cracking Insulating layer Electric heating facilities
This research was supported by Sichuan Science and Technology Program (No. 2018GZ0359), and the science and technology development program project of China Railway Group Limited (No. 2012-Major Scientific Project-08, No. 2014-Major Scientific Project-26), herewith acknowledge with best thanks. The comments of two anonymous reviews are appreciated.
- Hesami S, Ahmadi S, Ghalesari et al (2013) Ground surface settlement prediction in urban areas due to tunnel excavation by the NATM. Electr. J. Geotech. Eng 18:1961Google Scholar
- Pan H, Wang Z, Li B et al (2014) Treatment of water leakage and freezing of an operating railway tunnel on Ji’ning-Baotou railway in plateau and extremely cold region. Tunn Constr 34(7):696–702Google Scholar
- Shi Y, Chen L, Zheng B et al (2014) Analysis on effect of moisture content on tunnel lining cracking in seasonally frozen region. Subgrade Eng 5:214–219Google Scholar
- TB 1003-2005 Rail Tunnel Design Specifications (2005) China Railway Publishing House, Beijing, ChinaGoogle Scholar
- Wu J, Zheng B, Shi Y (2015) Analysis of causes of side wall cracking of tunnel located in highly weathered sandstone and mudstone in seasonal frozen soil area and its treatment measures. Railw Eng 6:67–71Google Scholar
- Zhai Z et al (2016) Cause analysis and treatment of water seepage and freezing in a highway tunnel in a high-altitude frigid area. Mod Tunnel Technol 34(7):696–702Google Scholar
- Zhang H (2012) Study on frost-heaving damage of railway tunnel lining in cold area and control measures. Railw Stand Des S2:8–11Google Scholar
- Zheng B, Wu J, Gao HB (2017) Lining cracking mechanism and treatment measures at tunnel portal in seasonally-frozen soil regions. Journal of Railway Engineering Society 34(7):72–77Google Scholar
- Zhu A (2013) Some thoughts on the reason for freezing damage to railway tunnels in northeast of China. Railw Stand Des 11:81–83Google Scholar