Analysis on the Effect of Excavation by Sections for Large Foundation Pit Without Horizontal Struts

  • Dongqing NieEmail author
Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 127)


Excavation by sections is usually used in large foundation pits without horizontal struts. The pile inclination monitoring of the excavation of Bailonggang underground wastewater treatment plant shows that the adjacent soil can provide significant restraining effects for the piles of 1st excavation section, and the excavation of the 2nd excavation section has great impacts on the piles in the 1st excavation section. Based on the monitoring result, a numerical calculation model by the finite difference method is built to study the effects of construction sequences and section width. The parametric study showed that the deformation of the excavation can be effectively controlled with the construction of the cushion and raft. The restraining effect to the piles from the cushion is just a little lower than the raft, while the deformation of the pit could be quite large before the cushion is constructed. The deformation of the retaining structure is reduced when the excavation section width is smaller. The analysis in this paper reveals that there is an optimal excavation section width, and the deformation of retaining structure cannot be additionally reduced if the excavation section width is smaller than the optimal width.


Large foundation pit Without horizontal struts Bailonggang Excavation by sections Deformation Finite difference method 


  1. 1.
    Liu, G.B., Wang, W.D.: Excavation Engineering Manual, pp. 94–95. China building industry press, Beijing (2009)Google Scholar
  2. 2.
    Ou, C.Y., Chiou, D.C., Wu, T.S.: Three-dimensional finite element analysis of deep excavations. J. Geotech. Eng. 122(5), 337–345 (1996)CrossRefGoogle Scholar
  3. 3.
    Lee, F.H., Yong, K.Y., Quan, K.C.N., et al.: Effect of corners in strutted excavations: field monitoring and case histories. J. Geotech. Geoenviron. Eng. 124(4), 339–349 (1998)CrossRefGoogle Scholar
  4. 4.
    Yu, J.L., Gong, X.N.: Spatial behavior analysis of deep excavation. Chin. J. Geotech. Eng. 21(01), 24–28 (1999)Google Scholar
  5. 5.
    Gao, W.H., Yang, L.D., Shen, P.S.: Analysis of factors in time-space effect of force and deformation or retaining structure of deep foundation pit under soft soil. China Civil Eng. J. 34(05), 90–96 (2001)Google Scholar
  6. 6.
    Lu, P.Y., Li, S.Z., Gu, L.Y.: Space analysis of retaining structures for foundation pits. Rock Soil Mech. 25(1), 121–124 (2004)Google Scholar
  7. 7.
    Lai, G.Z., Fang, Y.G., Shi, H.Y.: Spatial mutual deformation analysis method for row of piles of deep excavation. Rock Soil Mech. 28(8), 1749–1752 (2007)Google Scholar
  8. 8.
    Lei, M.F., Peng, L.M., Shi, C.H., An, Y.L.: Research on construction spatial effects in large-long-deep foundation pit. Rock Soil Mech. 31(05), 1579–1584+1596 (2010)Google Scholar
  9. 9.
    Liu, N.W., Gong, X.N., Yu, F., Fang, K.: Analysis of spatial effects in strutted excavation and related influential factors. Rock Soil Mech. 35(08), 2293–2298+2306 (2014)Google Scholar
  10. 10.
    Li, J.P., Chen, H.H., Li, L., Ma, J.S.: Observation on depth and spatial effects of deep excavation in soft clay. China J. Highw. Transp. 31(02), 208–217 (2018)Google Scholar
  11. 11.
    Cheng, X.S., Zheng, G., Deng, C.H., Huang, T.M., Nie, D.Q.: Mechanism of progressive collapse induced by partial failure of cantilever contiguous retaining piles. Chin. J. Geotech. Eng. 37(7), 1249–1263 (2015)Google Scholar
  12. 12.
    Cheng, X.S., Zheng, G., Diao, Y., et al.: Experimental study of the progressive collapse mechanism of excavations retained by cantilever piles. Can. Geotech. J. 54(4), 574–587 (2016)CrossRefGoogle Scholar
  13. 13.
    Do, N.A., Dias, D., Oreste, P., et al.: Three-dimensional numerical simulation for mechanized tunnelling in soft ground: the influence of the joint pattern. Acta Geotech. 9(4), 673–694 (2014)CrossRefGoogle Scholar
  14. 14.
    Zheng, G., Nie, D., Diao, Y., et al.: Numerical and experimental study of multi-bench retained excavations. Geomech. Eng. 13(5), 715–742 (2017)Google Scholar
  15. 15.
    Do, N.A., Dias, D., Oreste, P.P., et al.: 3D modelling for mechanized tunnelling in soft ground-Influence of the constitutive model. Am. J. Appl. Sci. 10(8), 863–875 (2013)CrossRefGoogle Scholar

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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.ShanghaiChina

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