Deformation rule of bored pile & steel support for deep foundation pit in sandy pebble geology


  • Xuansheng Cheng Lanzhou University of Technology
  • Jiuru He
  • Xinlei Li
  • Qingchun Xia
  • Hongling Su
  • Chaobo Chen



Sand pebble geology, deep foundation pit, bored pile, steel support, deformation rule


Regarding the whole excavation process of the support system of the Southwest Jiaotong University Station of Chengdu Metro Line 6 (the deep foundation pit bored pile + steel support and support system) as the engineering background, this paper studies the deformation rule of the deep foundation pit bored pile + steel support of the sandy pebble foundation. The deformation rule of this support system, the settlement rule of the ground surface outside the pit, and the rule of the uplift of the loose at the bottom of the pit are studied. A key analysis of the positive corner of the foundation pit is conducted, and the rationality of the optimization of the support scheme is evaluated. This paper provides effective guidance for the subsequent deep foundation pit construction and provides a reference for deep foundation pit construction.


Download data is not yet available.


Terzaghi K., and Peck R.B., 1948. Soli mechanics in engineering practice. New York: John Wiley and Sons.

Whittle A.J., Hashash Y.M.A., Whitman, R.V. 1993, Analysis of deep excavation in boston, Journal of Geotechnical Engineering, 119(1), 69-90.

Zhu, F.B., Miao, L.C., Gu, H.D., et al (2013), “A case study on behaviors of composite loose nailed wall with bored piles in a deep excavation”, Journal of Central South University, 20(7), 2017-2024.

Yang C.X. and Ma Y. (1989), “Subgrade slope reinforced with "loose nails"”, Railway building, (9), 9-15. (In Chinese).

Satty, T.L. The analytic hierarchy process. New York: Mc Graw Hill Inc.,1980.

Zhu, Z.G., Zhao, W., Li, S.G. (2013), “Study on calculation methods of brace construction for metro deep foundation pits”, Chinese Journal of Underground Space and Engineering, 9(5), 1109-1114.

Wei, D.J. (2016), ‘Research on support scheme optimization and risk control of deformation of metro foundation pit nearby buildings”, PhD’s thesis, Xi’an University of Architecture and Technology, Xi’an, China.

Liu, Z.J. and Lei, J.S. (2007), “Fuzzy probability model of supporting scheme for deep foundation pit of metro and its application”, Journal of Railway Science and Engineering, 4(6), 57-60.

Dai, Y.B., Zhang, S.G., Zhou, Z.S., et al. (2005), “Application of fuzzy consistent matrix theory to optimization of bracing projects for deep foundation pit of metro”, Chinese Journal of Geotechnical Engineering, 27(10), 1162-1165

Yu, C.Y. (2019), Design and deformation monitoring of complex support in deep foundation pit. 4th International Conference on Energy Equipment Science and Engineering, December, Xi'an, China.

Li, T., Shao, W., Zheng, L.F., et al. (2019), “Analytical solution of retaining pile’s deformation for deep loose-stone composite foundation”, Journal of China University of Mining and Technology, 48(03), 511-519.

Li, D., Zhang, Q.C., Jin, G. et al. (2015), “Analytical solution of earth pressure on supporting structure of deep foundation pit considering arching effects”, Rock and loose Mechanics, 36(S2), 401-405.

Zhang, J.G., Xiao, S. G., Zou, L. et al. (2013), “Earth pressure on retaining structure of round deep foundation pit in sand-cobble looses”, Journal of Civil Architectural & Environmental Engineering, 35(4), 89-93

Xiao, S.J. and Peng, W.P. (2018), “Scheme selection analysis on design of a deep and large foundation pit”, Journal of Hunan University Natural Sciences, 45(S1), 190-196

Yu, J.L., Long, Y., Xia, X. et al. (2017), “Basal stability for narrow foundation pit”, Journal of Zhejiang University (Engineering Science), 51(11), 2165-2174




How to Cite

Cheng, X., He, J., Li, X., Xia, Q., Su, H., & Chen, C. (2023). Deformation rule of bored pile & steel support for deep foundation pit in sandy pebble geology. Stavební Obzor - Civil Engineering Journal, 33(3), 282–297.