EFFECT OF SOILCRETE CHARACTERISTICS ON SURFACE SETTLEMENT DURING TUNNELING IN VIETNAM
DOI:
https://doi.org/10.11113/mjce.v25.15862Keywords:
surface settlement, Jet grouting, soilcrete, TBM, tunnel, soil reinforcement, ground improvement.Abstract
Excess surface settlement during construction of underground structures such as tunnels is concerned for historic buildings in big cities. A metro line No. 1 located at 20 m deep under the ground surface will be built in Ho Chi Minh City (HCMC) soon, and this metro crosses the City underneath many historic buildings. Reinforcing the soil mass surrounding the tunnel by soil-cement mixing (soilcrete) using jet grouting is considered a feasible solution to reduce surface settlement. However, appropriate characteristics of soilcrete for the HCMC’s geological conditions have not been thoroughly investigated. This study investigated the relationship between the characteristics of soilcrete (young modulus and thickness) and surface settlement at the city opera house, the historic building close to the metro, with a maximum allowable surface settlement of 10 mm.References
Almer, E. C. (2001) Grouting for Pile Foundation Improvement. PhD Thesis, Delft University of technology, 217 pp.
Brinkgreve, R.B.J. (2002) Reference manual V8. Plaxis Version 8, Netherlands: Balkema, 192 pp.
Burke (2004), Jet Grouting Systems: Advantages and Dis-advantages, Proceedings of the Conference American Society of Civil Engineering, Orlando, Florida. (in CDRom)
Bzowka (2004), Computational model for jet-grouting pile-soil interaction, Studia Geotechnica et Mechanica, Polan XXVI, pp. 3-4.
Essler, R. and Yoshida, H. (2004) Jet Grouting. In Moseley & Kirsch (eds.) Ground Improvement. New York: Spon Press, pp. 160-196.
Maidl, B. (1996) Mechanized Shield Tunneling. Germany: Ernst & John (English edition), 428 pp.
Nguyen Duc Toan (2006) TBM and Lining -Essential Inter-face. Master Thesis, COREP, Turin, Italy, 174 pp.
Nguyen Quoc Dung (2010) Jet Grouting technology applied for cut-off walls to mitigate seepage for water resources structures. Proceedings of the International conference in big dams.
Hanoi, CDRom version. (in Vietnamese)
S.G. Ercelebi, H. Copur, I. Ocak (2011) Surface settlement predictions for Istanbul Metro tunnels excavated by EPB-TBM. Environmental Earth Sciences, Volume 62, Issue 2, pp. 357-365.
Tan, W. L. and P. G. Ranjith (2003) Numerical analysis of pipe group reinforcement in soft ground tunneling. Proceeding of the 16th International Conference on Engineering Mechanics, ASCE, Seattle, USA.
Tran-Nguyen, H.H. (2011) Evaluation of potential application at Jet Grouting in Vietnam. Journal of Transport, 9: 28-31. (in Vietnamese)
Ly Huu Thang & Tran Nguyen Hoang Hung (2012) Fundamental assessment of Jet Grouting applications in Vietnam. Journal of Construction, 10: 78-82. (in Vietnamese)
Tran-Nguyen, H.H., Ly, H.T., and Le, T.T. (2012) Field experiments on Jet Grouting at Nhieu Loc Canal in HCMC: Equipment & Field experiments. Journal of Transport, 11: 20-22. (in Vietnamese)
