Abstract
Ningbo is located in the east China coast where the soft clay is widely distributed, series of problems were encountered when the subways were constructed. The ground movements caused by the EPB (Earth Pressure Balanced) tunneling is one of the problems that do great damage to the structure adjacent to the tunnel. In order to better understand the performance of the EPB tunneling, a comprehensive monitoring section was installed and a lot of field tests were undertaken, and further the data were analyzed with the construction process. It was demonstrated by the results that with the EPB shield moving closer, reaching and leaving from the monitoring section, the soil would move outward, then inward and finally be steady. When the cutter face reached the monitoring section, the maximum lateral displacement 44 mm occurred in inclinometer tube 7 that is 4.5 m far away from the tunnel axis. The farther the inclinometer tube was from the tunnel, the smaller lateral displacement the soil had. In addition, the grouting was an important factor, therefore the grouting parameters including pressure, volume and opportunity must be handled and controlled cautiously. Finally, the disturbance boundary was predicted about 9 m far away from the tunnel axis, that was nearly 3 times of the tunnel radius. The study may help construction companies, designers, supervisors and other relevant researchers to understand the effect induced by EPB tunneling in Ningbo soft clay more clearly.
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References
Report: structural disturbance of soft clay and the deformation control of the subway engineering.
some key technologies in civil engineering during the initial stage of the Ningbo Rail Transit.
J. R. STANDING, D. SELEMETAS, Greenfield ground response to EPBM tunnelling in London Clay, Geotechnique 63(2013), 989–1007.
Chao Liu a, Zixin Zhang, Pile and pile group response to tunnelling using a large diameter slurry shield – Case study in Shanghai Computers and Geotechnics 59 (2014), 21–43.
R. P. Chen, J. Zhu, Ground movement induced by parallel EPB tunnels in silty soils, Tunnelling and Underground Space Technology 26 2011. 163–171.
Dias D, Kastner R. Movements caused by the excavation of tunnels using face pressurized shields — Analysis of monitoring and numerical modeling results[J]. Engineering Geology, 2013, 152(1):17–25.
LIN Cungang Research on Shield Tunneling induced ground surface heave and subsidence and behavior of underwater shield driven tunnels subject to tidal bores[D]. Zhejiang University 2014.
Pinto F, Whittle A J. Ground Movements due to Shallow Tunnels in Soft Ground. I: Analytical Solutions[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2014, 140(4):240–252.
Pinto F, Zymnis D M, Whittle A J. Ground Movements due to Shallow Tunnels in Soft Ground. II: Analytical Interpretation and Prediction[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2014, 140(4):80–90.
Zhang Z, Huang M. Geotechnical influence on existing subway tunnels induced by multiline tunneling in Shanghai soft soil[J]. Computers & Geotechnics, 2014, 56(1):121–132.
González C, Sagaseta C. Patterns of soil deformations around tunnels. Application to the extension of Madrid Metro[J]. Computers & Geotechnics, 2001, 28(6-7):págs. 445–468.
Sagaseta C. Analysis Of Undrained Soil Deformation Due To Ground Loss[J]. Geotechnique, 1988, 38(3):301–320.
Acknowledgements
The research works involved in this paper are supported in financial by the Natural Science Foundation of China (No. 51678524 and No. 51561130159). And the field test was supported by Ningbo Urban Rail Transit Project Construction Headquarters and China Tiesiju Civil Engineering Group Company, in consult, technology and coordination.
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Zhu, Y., Gao, F., Ye, J., Bian, X., Lin, W., Chen, Y. (2018). Lateral Ground Displacement Induced by EPB Tunneling in Ningbo Soft Clay. In: Bian, X., Chen, Y., Ye, X. (eds) Environmental Vibrations and Transportation Geodynamics. ISEV 2016. Springer, Singapore. https://doi.org/10.1007/978-981-10-4508-0_63
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DOI: https://doi.org/10.1007/978-981-10-4508-0_63
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