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Displacement ratio dichotomy back analysis of surrounding rock-initial support system of weathered rock tunnel

  • Jiancong XuEmail author
  • Yedi Ni
Original Paper
  • 49 Downloads

Abstract

The mechanical design parameters of surrounding rock and primary support of weathered rock tunnel are difficult to obtain by experiments. In this paper, taking the ratio of vault settlement to flank wall horizontal displacement as an investigation variable, we proposed the displacement ratio dichotomy numerical back analysis method (DDNBAM) to calculate the physical–mechanical parameters of tunnel surrounding rock-initial support system. Based on the DDNBAM, we presented a new method to evaluate the rationality of primary support design parameters by the ratio of the equivalent lateral pressure coefficient to the equivalent Young’s modulus with time for weathered rock tunnel in construction. The results are shown as follows: the results calculated by the DDNBAM may reasonably reflect the dynamic variations of tunnel surrounding rock-primary support system using the center cross disphragm (CRD) method; the higher calculation precision may be obtained using the DDNBAM, comparing with the parabolic-apex back analysis method previously proposed by Xu (2012); and adopting the DDNBAM may obtain more reasonable and reliable physical–mechanical parameters of surrounding rock-initial support system.

Keywords

Tunnel Displacement ratio Dichotomy Back analysis Surrounding rock Initial support 

Notes

Funding information

This work was financially supported by the Grants from the Yalong River Joint Fund of National Natural Science Foundation of China and Yalong River Hydropower Development Co., Ltd. (No. U1765110), the Fundamental Research Funds for the Central Universities (22120180312), the China Postdoctoral Science Foundation (20060390165), and the Natural Science Foundation of Shanghai (16ZR1423300).

References

  1. Bertuzzi R (2017) Back-analysing rock mass modulus from monitoring data of two tunnels in Sydney, Australia. J Rock Mech Geotech Eng 9(5):877–891CrossRefGoogle Scholar
  2. Boidy E, Bouvard A, Pellet E (2002) Back analysis of time-dependent behaviour of a test gallery in claystone. Tunn Undergr Space Technol 17(4):415–424CrossRefGoogle Scholar
  3. Cai M, Morioka H, Kaiser PK, Tasaka Y, Kurose H, Minami M, Maejima T (2007) Back-analysis of rock mass strength parameters using AE monitoring data. Int J Rock Mech Min Sci 44(4):538–549CrossRefGoogle Scholar
  4. Fakhimi A, Salehi D, Mojtabai N (2004) Numerical back analysis for estimation of soil parameters in the Resalat Tunnel project. Tunn Undergr Space Technol 19(1):57–67CrossRefGoogle Scholar
  5. Feng XT, Zhao H, Li S (2004) A new displacement back analysis to identify mechanical geo-material parameters based on hybrid intelligent methodology. Int J Numer Anal Methods Geomech 28(11):1141–1165CrossRefGoogle Scholar
  6. Gao W, Ge MM (2016) Back analysis of rock mass parameters and initial stress for the Longtan tunnel in China. Eng Comput 32(3):497–515CrossRefGoogle Scholar
  7. Ghorbani M, Sharifzadeh M (2009) Long term stability assessment of Siah Bisheh powerhouse cavern based on displacement back analysis method. Tunn Undergr Space Technol 24(5):574–583CrossRefGoogle Scholar
  8. Hisatake M, Hieda Y (2008) Three-dimensional back-analysis method for the mechanical parameters of the new ground ahead of a tunnel face. Tunn Undergr Space Technol 23(4):373–380CrossRefGoogle Scholar
  9. Jia C, Liu N, Xiao SF (2003) Application of direct displacement inverse analysis to rockmass parameters of caverns. Rock Soil Mech 24(3):450–454 (in Chinese)Google Scholar
  10. Karakus M, Fowell RJ (2005) Back analysis for tunnelling induced ground movements and stress redistribution. Tunn Undergr Space Technol 20(6):514–524CrossRefGoogle Scholar
  11. Qiu SH, Yang L d, Wang YZ, Zhang GF (2003) Viscoelastic back-analysis of experimental cavity in underground factory. J Tongji Univ: Nat Sci Ed 31(9):1024–1028 (in Chinese)Google Scholar
  12. Rechea C, Levasseur S, Finno R (2008) Inverse analysis techniques for parameter identification in simulation of excavation support systems. Comput Geotech 35(3):331–345CrossRefGoogle Scholar
  13. Shang YJ, Cai JG, Hao WD, Wu XY, Li SH (2002) Intelligent back analysis of displacements using precedent type analysis for tunnelling. Tunn Undergr Space Technol 17(4):381–389CrossRefGoogle Scholar
  14. Shreedharan S, Kulatilake PHSW (2016) Discontinuum-equivalent continuum analysis of the stability of tunnels in a deep coal mine using the distinct element method. Rock Mech Rock Eng 49(5):1903–1922CrossRefGoogle Scholar
  15. Tang YG, Kung GTC (2009) Application of nonlinear optimization technique to back analyses of deep excavation. Comput Geotech 36(1):276–290CrossRefGoogle Scholar
  16. Vardakos SS, Gutierrez MS, Barton NR (2007) Back-analysis of Shimizu tunnel no. 3 by distinct element modeling. Tunn Undergr Space Technol 22(4):401–413CrossRefGoogle Scholar
  17. Vardakos S, Gutierrez M, Xia CC (2016) Back-analysis of tunnel response from field monitoring using simulated annealing. Rock Mech Rock Eng 49(12):4833–4852CrossRefGoogle Scholar
  18. Wang X, Kulatilake PHSW, Song W-d (2012) Stability investigations around a mine tunnel through three-dimensional discontinuum and continuum stress analyses. Tunn Undergr Space Technol 32:98–112CrossRefGoogle Scholar
  19. Xing Y, Kulatilake PHSW, Sandbak LA (2018a) Investigation of rock mass stability around the tunnels in an underground mine in USA using three-dimensional numerical modeling. Rock Mech Rock Eng 51(2):579–597CrossRefGoogle Scholar
  20. Xing Y, Kulatilake PHSW, Sandbak LA (2018b) Effect of rock mass and discontinuity mechanical properties and delayed rock supporting on tunnel stability in an underground mine. Eng Geol 238:62–75CrossRefGoogle Scholar
  21. Xu JC, Xu YW (2012) Parabolic-apex numerical back-analysis of mechanics parameters of surrounding rock. Appl Mech Mater 204-208:196–201CrossRefGoogle Scholar
  22. Zhang LQ, Yue ZQ, Yang ZF, Qi JX, Liu FC (2006) A displacement-based back-analysis method for rock mass modulus and horizontal in situ stress in tunneling—illustrated with a case study. Tunn Undergr Space Technol 21(6):636–649CrossRefGoogle Scholar

Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of EducationTongji UniversityShanghaiPeople’s Republic of China
  2. 2.Department of Geotechnical EngineeringTongji UniversityShanghaiPeople’s Republic of China

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