Three-dimensional discrete element analysis of the excavation face stability of deep-buried shield tunnels

Xin Huang; Zihao Zhang; Guangyi Yan; Jiaqi Guo; Chong Xu; Qi Liang

doi:10.56748/ejse.24634

Authors

Xin Huang Henan Polytechnic University
Zihao Zhang Henan Polytechnic University
Guangyi Yan China Railway First Survey and Design Institute Group Co.
Jiaqi Guo Henan Polytechnic University
Chong Xu China Railway First Survey and Design Institute Group Co. Ltd.
Qi Liang Henan Polytechnic University

DOI:

https://doi.org/10.56748/ejse.24634

Keywords:

Deep-buried shield tunnel, excavation face stability, chamber earth pressure, 3D discrete element analysis

Abstract

To study the stability and the influencing factors of shield tunnel excavation face under deep burial conditions, relying on the Bailuyuan shield tunnel in the second phase of the "Water Diversion from the Han to the Wei River" project, we conducted indoor uniaxial compression tests, repose angle tests, and three-dimensional discrete element simulation analysis, calibrated the microparameters of the strata, and constructed a three-dimensional discrete element model of shield tunnel excavation face. The stability and settlement characteristics of the shield tunnel excavation face under different influencing factors were studied. Research results showed that (1) The horizontal displacement of tunnel excavation face and the critical chamber earth pressure ratio increase nonlinearly with the increase of tunnel burial depth; (2) The horizontal displacement of the excavation face, geological settlement, and critical chamber earth pressure ratio all increase with the increase of the cutterhead opening rate; (3) The horizontal displacement of the excavation face and the settlement of the strata increase with the increase of excavation speed and cutterhead rotation rate. The critical chamber earth pressure increases with the increase of cutterhead rotation rate, but is not significantly affected by changes in excavation speed; (4) As to the degree of influence, the burial depth has a significant impact on the horizontal displacement of the excavation face. The influence of the cutterhead opening rate and cutterhead rotation rate on the horizontal displacement of the excavation face is greater than on the settlement of the strata, while the influence of excavation speed on the settlement of the strata is greater than that of the horizontal displacement of the excavation face.

Downloads

Download data is not yet available.

References

Chen, L.Y., Wang, D. H., & Xu, J. (2022) Design optimization and construction control for the stability of shallow tunnels" by et al. International Journal of Civil Engineering.14,1238.

Chen, G. Y.,He, P., Xiao, J., & Bi, W. L.(2023) Study on Stability of Excavation Surface of Shield Tunnel in Clay Layer. Transportation Research Record, 2677 (12):675-693.

Di, Q. G., Li, P. F., Zhang, M. J., & Cui, X. P. (2023). Experimental study of face stability for shield tunnels in sandy cobble strata of different densities[J]. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research, 135.

Dong, F., Fang, Q., Zhang, D. L., Xu, H. J., Li, Y. J., & Niu, X. K. (2017). Analysis on defects of operational metro tunnels in Beijing[J]. Journal of Civil Engineering, 50(06): 104-113.

Fu, X. S., Gong, Q. M., Wu, Y. J., Zhao, Y., & Li, H. (2022). Prediction of EPB shield tunneling advance rate in mixed ground condition using optimized BPNN model. Appl. Sci. 12, 5485.

Ge, S. S., Gao, W., Wang, Y. W., Xie, Y., Chen, X., & Wang, S. (2023). Review on evaluation and treatment of traffic shield tunnel defects in China[J]. Journal of Civil Engineering, 56(01): 119-128.

Hernández, Y. Z., Farfán, A. D., & André. P. A. (2019) Three-dimensional analysis of excavation face stability of shallow tunnels, Tunnelling and Underground Space Technology, 92.

Ibrahim, E., Soubra, A., Mollon, G., Raphael, W., Dias, D., & Reda, A. (2015). Three-dimensional face stability analysis of pressurized tunnels driven in a multilayered purely frictional medium[J]. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research, 4918-34.

Lu, D. C., Ma, Y. D., Kong, F. C., Guo, C. X., Miao, J. B., & Du, X. L. (2023). Support vector regression with heuristic optimization algorithms for predicting the ground surface displacement induced by EPB shield tunneling[J]. Gondwana Research, 1233-15.

Li, S. Q., Zhang, Y. N., & Zhi, J. M. (2019) Influence of tunnel design and construction parameters on the stability of shallow tunnel faces. Tunnelling and Underground Space Technology.132(15):384-397.

Li, W., Zhang, C. P., Tu, S. Q., Chen, W., & Ma, M. S. (2023). Face stability analysis of a shield tunnel excavated along inclined strata, Underground Space, Volume 13, Pages 183-204, ISSN 2467-9674.

Liu, X. R., Liu, D. S., Chen, Q., Zhou, X. H., & Xiong F. (2022). Research on the sensitivity of factors affecting the stability of slurry shield excavation face and control parameter optimization[J]. Chinese Journal of Underground Space and Engineering, 18(06): 1954-1961.

Liang, Q., Xu, J. J., & Wei, Y. G. (2023). Three-dimensional stability analysis of tunnel face based on unified strength theory. Sci Rep 13, 12326.

Niu, Y. L., Ren, T. L., Zhou, Q., & Jiao, X. Y. (2023) Analysis of excavation parameters on face stability in small curvature shield tunnels. Sustainability, 15, 6797.

Su, A., Wang, S. M., He, C., Lu, D. Y., & Fang, R. Q. (2019). Disease characteristics and causes analysis of segments of shield tunnels incomposite stratum during construction[J]. Chinese Journal of Geotechnical Engineering, 41(04): 683-692.

Wang, L., Ren, K.F., & Yang, S.Y. (2023) Stability analysis of shallow tunnels considering the interaction between design and construction factors. Journal of Rock Mechanics and Geotechnical Engineering.13(02):527-536.

Xu, Q. W., Xie, J. L., & Zhang, L. Y. (2023) Failure analysis of progressive instability and deformation law of excavation face in sand cobble stratum under cutting disturbance by shield cutter, Engineering Failure Analysis, volume 154.

Yao, Q. Y., Zhang, R. L., Gong, Q. M., & Zhou, S. H. (2023). Analysis of shield Excavation face failure and tunneling control with two parameters in sandy cobble strata[J]. Journal of Tongji University (Natural Science), 51(09): 1407-1415.

Yang, Z. N., Liu, Q. W., & Liu, L. S. (2016). Sensitivity analysis of factors affecting the stability of slurry shield excavation face [J]. Modern tunnel technology, 53(02): 141-147.

Zhang, J. X., Li, B., Jiang, Y. S., Jiang, H., Yin, M. L., & Sun, Z. Y. (2023). Research on the wear characteristics of shield cutter in sand-pebble strata based on EDEM[J]. Chinese Journal of Geotechnical Engineering: 4: 1-8.

Zhang, Z. Q., Li, H. Y., & Yang, H. Y. (2019) Failure modes and face instability of shallow tunnels under soft grounds, International Journal of Damage Mechanics,28(4):566-589.