Uplift Model Analysis for Shallow Overlaying Slurry Shield Tunnel Based on Time-Varying Behavior of Cement Grouting Material

Abstract:

As a necessary and key procedure of shield technology, synchronous grouting affects ground layer deformation, and controls the tunnel uplift and ground subsidence, usually exerting negative influence on underground engineering construction and surrounding buildings. This paper establishes the 2D uplift model of the soil and lining by ABAQUS, based on a static buoyancy varying with solidification of grout and dynamic buoyancy produced by grouting pressure. The effect of buoyancy on lining is simulated in the lining and soil through a series of specific magnitude of interference fit. Effectiveness of the model is validated by comparison of data measurement of South Hongmei Rd. tunnel with predicted results for vertical displacement of ground surface. East line of South Hongmei Rd. tunnel with super large diameter is chosen for the simulation and central burial depths vary as a key parameter. The results show t4hat the differences between predictions and data measurement are limited, hence providing a basis of numerical analysis for the design and optimization of shallow slurry shield tunnel with super large diameter.

• Periodical: Key Engineering Materials (Volume 723)
• Pages: 782-788
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.723.782
• Online since: December 2016
• Authors: Yu Haung*, Lin Li, Jing Ni, Lei Biao Chen
• Keywords: Numerical Analysis, Shallow, Slurry Shield Tunnel, Uplift

References

[1] O. Arnau, C. Molins, Experimental and tunnel linings based Tunnel under Space analytical study of the structural response of segmental tunnel linings based on an in-situ loading test. Part 2: Numerical simulation, Tunnel Under Space Tech, 26 (2011).

DOI: 10.1016/j.tust.2011.04.005

[2] M. Q. Xiao, Research on upward moving of segments of shield tunnel, Rock Soil Mech. 4 (2009) 1041-1045+1056.

[3] K. Thomas, M. Gunther, A numerical study of effect of soil and grout material properties and cover depth in shield tunneling, Comput. Geo-tech. 33(4-5) (2006) 234-247.

[4] K. Thomas, M. Gunther, On the influence of face pressure, grouting pressure and TBM design in soft ground tunneling, Tunnel. Undergr. Space Technol. 21(2) (2006) 160-171.

DOI: 10.1016/j.tust.2005.06.006

[5] F. Ye, C. He, S. M. Wang, Analysis of mechanical characteristic of shield tunnel segments lining and its influence during construction, Rock Soil Mech. 6 (2011) 1801-1807+1812.

[6] J. X. Lin, C. F. Duan, Y. P. Zhao, B. Xie, Study of new mortar anti-floating model experiment of tunnel, Urban Roads Bridges Flood Control, 8(8) (2008) 157-160.

[7] F. Q. Yang, Large diameter slurry shield funnel tests and theoretical studies of anti-floating, Shanghai Tongji University, (2009).

[8] H. Z. Zhang, J. W. Zhang, J. H. Zhai, ANSYS Method for Deduction of Parameters of Equivalent Circular Zone of Shield Tunnel, Tunnel Constr. 5 (2006) 8-10+27.

[9] M. H. Hao, H. Q. Chen, Y. H. Zhang, ABAQUS based discussion on dilatancy angle of D-P criterion, Water conservancy Hydropower Technol. 11 (2012) 25-27+43.

[10] K. Fei, J. W. Zhang, Application of ABAQUS to Geotechnical engineering, Beijing: China Water& Power Press, 2010, 345-347.