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Journal of Mountain Science

, Volume 16, Issue 11, pp 2519–2531 | Cite as

Cohesion variation during instability evolution of disaster medium in mud inrush of mountain tunnel

  • Teng Yang
  • Qing-song Zhang
  • Xiao Zhang
  • Xiang-hui LiEmail author
  • Jia-qi Zhang
  • Yu-xue Sun
  • Zhuang Li
Article
  • 2 Downloads

Abstract

Mud inrush in mountain tunnel is an independent geological hazard type different from water inrush, landslide and debris flow. The intrinsic factor of mud inrush is the instability failure of disaster medium. Its essence is that when the cohesion decreases gradually with the increase of void ratio to the point where the movement of soil particles cannot be restricted, soil particles and groundwater form slurry and gush out. Thus, accurate calculation of cohesion with variable void ratios is crucial for analyzing the reliability of disaster medium. In this study, the disaster medium was regarded as graded soil and a structural model was established wherein soil particles were simplified as cubes and the inter-particle pores were represented by the clearance between cubes. On the basis of the structure model of disaster medium, a function between the soil particle distance and void ratio was derived. Cohesion is equivalent to the resultant force between soil particles per unit area; thus, a cohesion function was derived in which the void ratio is the main variable. This function considers the influence of gradation characteristics on cohesion variation and is generally applicable to various types of disaster medium. A series of direct shear tests were carried out to determine the cohesion variation for different types of disaster medium with variable void ratios. By comparing the variation of cohesion obtained through direct shear tests with those deduced by the proposed cohesion function, we verified the validity and general applicability of the cohesion function. It is of great significance because the cohesion function can accurately predict the variation of cohesion by using the void ratio, and effectively evaluate the possibility of mud inrush according to the initial mechanical properties of disaster medium.

Keywords

Cohesion Disaster medium Graded soil Structure model Void ratio Shear test 

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Notes

Acknowledgements

The research reported in this manuscript was funded by the National Natural Science Foundation of China (Grant No. U1706223) and the Natural Science Foundation of Shandong Province (Grant No. ZR2017MEE070).

References

  1. Arroyo H, Rojas E, Perez-Rea MD, et al. (2013) Simulation of the shear strength for unsaturated soils. Comptes Rendus Mecanique 341(11–12): 727–742.  https://doi.org/10.1016/jxrme.2013.10.005 CrossRefGoogle Scholar
  2. Ghanbari E, Hamidi A (2015). Improvement parameters in dynamic compaction adjacent to the slopes. Journal of Rock Mechanics and Geotechnical Engineering 7(2): 233–236.  https://doi.org/10.1016/j.jrmge.2015.02.002 CrossRefGoogle Scholar
  3. Han JY (2001) Discussion on error of parameters in direct shear test. Dam Observation and Geotechnical Tests 25(02): 43–44. (In Chinese)  https://doi.org/10.3969/j.issn.1671-3893.2001.02.013 Google Scholar
  4. Havaee S, Mosaddeghi MR, Ayoubi S (2015) In situ surface shear strength as affected by soil characteristics and land use in calcareous soils of central Iran. Geoderma 237–238: 137–148.  https://doi.org/10.1016/j.geoderma.2014.08.016 CrossRefGoogle Scholar
  5. Ibrahim, Kamal Mohamed Hafez I (2015) Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil. Ain Shams Engineering Journal 6(2): 413–419.  https://doi.org/10.1016/j.asej.2014.10.012 CrossRefGoogle Scholar
  6. Khezri N, Mohamad H, Hajihassani M, Fatahi B (2015). The stability of shallow circular tunnels in soil considering variations in cohesion with depth. Tunnelling and Underground Space Technology 49: 230–240.  https://doi.org/10.1016/j.tust.2015.04.014 CrossRefGoogle Scholar
  7. Li BX, Miao TD (2006) Research on water sensitivity of loess shear strength. Chinese Journal of Rock Mechanics and Engineering 25(05): 1003–1008. (In Chinese)  https://doi.org/10.3321/j.issn:1000-6915.2006.05.022 Google Scholar
  8. Lifshitz EM (1956) The Theory of Molecular Attractive Forces between Sol ids. Soviet Physics 2(1): 73–83.Google Scholar
  9. Malizia JP, Shakoor A (2018) Effect of water content and density on strength and deformation behavior of clay soils. Engineering Geology 244: 125–131.  https://doi.org/10.1016/j.enggeo.2018.07.028 CrossRefGoogle Scholar
  10. Mo LL, Zhao XS, Wang X (2015) Data processing method of direct shear test based on Excel. Railway Engineering 09: 102–105. (In Chinese)  https://doi.org/10.3969/j.issn.1003-1995.2015.09.29 Google Scholar
  11. Munday JN, Capasso F, Parsegian VA (2009) Measured long-range repulsive Casimir-Lifshitz forces. Nature 457(7226): 170–173.  https://doi.org/10.1038/nature07610 CrossRefGoogle Scholar
  12. Nam S, Gutierrez M, Diplas P, Petrie J (2011) Determination of the shear strength of unsaturated soils using the multistage direct shear test. Engineering Geology 122(3–4): 272–280.  https://doi.org/10.1016/j.enggeo.2011.06.003 CrossRefGoogle Scholar
  13. Pham BT, Son LH, Hoang TA, et al. (2018) Prediction of shear strength of soft soil using machine learning methods. CATENA 166: 181–191.  https://doi.org/10.1016/j.catena.2018.04.004 CrossRefGoogle Scholar
  14. Wei J, Shi B, Li J, et al. (2018) Shear strength of purple soil bun ds under different soil water contents and dry densities: A case study in the Three Gorges Reservoir Area, China. CATENA 1 66: 124–133.  https://doi.org/10.1016/jxatena.2018.03.021 CrossRefGoogle Scholar
  15. Xu XT, Jian WB, Liu K (2015) Effect of water content and dry density on shear strength parameters of residual soil. Chinese Journal of Underground Space and Engineering 11(02): 364–369. (In Chinese)Google Scholar
  16. Yuan JP, Zhan B, Chen SC (2013) Effects of water content and compaction degree on mechanical characteristics of roadbed. Journal of Water Resources and Architectural Engineering 11(02): 98–102. (In Chinese)  https://doi.org/10.3969/j.issn.1672-1144.2013.02.023 Google Scholar
  17. Zhang CL, Wang XS, Zou XY, et al. (2018) Estimation of surface shear strength of undisturbed soils in the eastern part of northern China’s wind erosion area. Soil and Tillage Research 178: 1–10.  https://doi.org/10.1016/j.still.2017.12.014 CrossRefGoogle Scholar
  18. Zhang K, Li MZ, Yang BB (2016) Research on effect of water content and dry density on shear strength of remolded loess. Journal of Anhui University of Science and Technology (Natural Science) 36(03): 74–79. (In Chinese)  https://doi.org/10.3969/j.issn.1672-1098.2016.03.015 Google Scholar
  19. Zhang ZG (2006) Techniques to deal with the mud-outburst in a karst in Lazhidong tunnel. Modern Tunnelling Technology 43(06): 56–59. (In Chinese)  https://doi.org/10.3969/j.issn.1009-6582.2006.06.011 Google Scholar
  20. Zhao Y, Li PF, Tian SM (2013). Prevention and treatment technologies of railway tunnel water inrush and mud gushing in China. Journal of Rock Mechanics and Geotechnical Engineering 5(6): 468–477. (In Chinese)  https://doi.org/10.1016/j.jrmge.2013.07.009 CrossRefGoogle Scholar

Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Geotechnical & Structural Engineering Research CenterShandong UniversityJinanChina

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