Abstract
To define the deformation of time and space during the construction of a long and deep foundation pit in collapsible loess, the field-measured data of 10 open excavation stations in Xi’an metro are analyzed statistically. The results indicate that the vertical deformation of the ground and the lateral deformation of the soldier pile caused by the excavation of a long and deep foundation pit in collapsible loess increase with time. The maximum surface subsidence decreases with the increase in stiffness (K) of the foundation pit support system, increases linearly with the excavation depth (Hw), and decreases with the increase in the aspect ratio of the foundation pit. The lateral maximum deformation value of the soldier pile decreases linearly with the increase in insertion ratio and decreases with the increase in K of the support system. The surface subsidence of the foundation pit is characterized by a “groove shape”, and the deformation of the soldier pile is characterized as the “medium convex”. These results can provide a reference for the design and construction of similar projects in loess areas, and can predict and evaluate the deformation size and safety of similar projects, which is of great significance for further understanding the deformation mechanism of deep foundation pits in loess areas, thus perfecting the design theory and preventing foundation pit accidents.
Similar content being viewed by others
References
Mei, Y.; Hu, C.M.; Yuan, Y.L.; Wang, X.Y.; Zhao, N.: Experimental study on deformation and strength property of compacted loess. Geomech. Eng. 11(1), 161–175 (2016)
Li, Y.R.; He, S.D.; Deng, X.H.; Xu, Y.X.: Characterization of macropore structure of Malan loess in NW China based on 3D pipe models constructed by using computed tomography technology. J. Asian Earth Sci. 154, 271–279 (2018)
Haeri, S.M.; Garakani, A.A.: Hardening behavior of a hydro collapsible loessial soil. J. Jpn. Geotech. Soc. Spec. Publ. 2(4), 253–257 (2016)
Hu, C.M.; Wang, X.Y.; Mei, Y.; Yuan, Y.L.; Zhang, S.S.: Compaction techniques and construction parameters of loess as filling material. Geomech. Eng. 15(6), 1143–1151 (2018)
Arya, A.L.; Samson, N.; Ian, S.: Loess as a collapsible soil: some basic particle packing aspects. J. Quat. Int. 469, 20–29 (2018)
Ou, C.Y.; Hsieh, P.G.; Chiou, D.C.: Characteristics of ground surface settlement during excavation. Can. Geotech. J. 30(5), 758–767 (1993)
Leung, E.H.Y.; Ng, C.W.W.: Wall and ground movements associated with deep excavations supported by cast in situ wall in mixed ground conditions. J. Geotech. Geoenviron. Eng. ASCE 133(2), 129–143 (2007)
Xu, Z.H.; Wang, J.H.; Wang, W.D.: Deformation behavior of diaphragm walls in deep excavations in Shanghai. China Civ. Eng. J. 41(8), 81–86 (2008)
Wang, W.D.; Xu, Z.H.; Wang, J.H.: Statistical analysis of characteristics of ground surface settlement caused by deep excavations in shanghai soft soils. Chin. J. Geotech. Eng. 33(11), 1659–1666 (2011)
Li, S.; Zhang, D.L.; Fang, Q.; Li, Z.J.: Research on characteristics of retaining wall deformation due to deep excavation in Beijing. Chin. J. Rock Mech. Eng. 31(11), 2344–2353 (2012)
Liu, M.L.; Zhang, D.L.; Fang, Q.; Hou, Y.: Wall and ground movements due to deep excavation of Tianjin subway station. In: DEStech International Conference on Transportation Infrastructure and Materials (2017)
Xie, W.; Lu, K.L.; Zhu, D.Y.: Partition excavation of a subway deep foundation pit: monitoring and numerical simulation. J. Yangtze River Sci. Res. Inst. 34(12), 106–110 (2017)
Li, J.W.; Li, X.; Xiong, M.X.; Luo, H.F.: Deformation monitoring and numerical simulation of retaining structure in subway station deep foundation pit. Electron. J. Geotech. Eng. 21(6), 2331–2340 (2016)
Xu, G.L.; Zhang, J.W.; Liu, H.; Ren, C.Q.: Shanghai center project excavation induced ground surface movements and deformations. J. Front. Struct. Civ. Eng. 12(1), 26–43 (2018)
Hong, Y.; Ng, C.W.W.; Liu, G.B.; Liu, T.: Three-dimensional deformation behaviour of a multi-propped excavation at a “greenfield” site at Shanghai soft clay. J. Tunn. Undergr. Space Technol. Inc. Trenchless Technol. Res. 45, 249–259 (2015)
Fan, Y.; Lei, L.: Subway station deep foundation pit deformation research law based on FLAC (3D). In: Geomatics and Spatial Information Technology (2018)
Yu, Y.; Yang, S.S.; Liu, G.Y.; Wang, Y.P.; Cui, L.W.; Tong, X.J.: 3D numerical simulation analysis on the deformation of deep foundation excavation of subway station in Taiyuan. Constr. Technol. 45(07), 74–77 (2016)
Zhou, G.N.: Time-space effect analysis and control of deep foundation excavation in soft soil. Chin. J. Undergr. Space Eng. 10(S1), 1653–1658 (2014)
Wu, Y.Q.; Zhu, Y.P.: Monitoring and numerical simulation of deformation law of deep foundation pit of subway station in Lanzhou collapsible loess. Chin. J. Geotech. Eng. 36(S2), 404–411 (2014)
Wan, Z.H.; Liu, H.Y.; Bu, Y.J.: Analysis of deformation monitoring and numerical simulation on retaining structure of deep foundation excavation. Constr. Technol. 44(07), 83–86 (2015)
Wang, Z.; Wang, C.: Analysis of deep foundation pit construction monitoring in a metro station in Jinan city. Geotech. Geol. Eng. 37, 249–259 (2019)
Tang, S.L.; Chen, M.J.; Niu, W.X.; Wu, G.S.: Study on deformation law of long narrow deep soft soil foundation excavation. Constr. Technol. 47(17), 89–94 (2018)
Cheng, F.; Zhang, Y.X.; Wan, Y.X.: Deformation characteristics of deep foundation pits of subway stations in South Jiangsu Province soft soil. Chin. J. Undergr. Space Eng. 9(02), 387–391 (2013)
Mei, Y.; Hu, C.M.; Wang, X.Y.; Yuan, Y.L.; Zhao, N.: Research on characteristic deformation of ground surface and retaining pile induced by deep foundation pit excavation of subway station in collapsible loess of Xi’an area. China Railw. Sci. 37(01), 9–16 (2016)
Seo, M.W.; Olson, S.M.: Sequential analysis of ground movements at three deep excavation sites with mixed ground profiles. J. Geotech. Geoenviron. Eng. ASCE 136(5), 656–668 (2010)
Clough, G.W.; O’Rourke, T.D.: Construction induced movements of in situ walls. In: ASCE Conference on Design and Performance of Earth Retaining Structures Special Publication No. 25, ASCE, New York, pp. 439–470 (1990)
Wong, I.H.L.; Poh, T.Y.; Chuah, H.: Performance of excavations for depressed expressway in Singapore. J. Geotech. Geoenviron. Eng. ASCE 123(7), 617–625 (1997)
Hashash, Y.M.A.; Osouli, A.; Marulanda, C.M.: Central artery tunnel project excavation induced ground deformations. J. Geotech. Geoenviron. Eng. ASCE 134(2), 1399–1406 (2008)
Moormann, C.: Analysis of wall and ground movements due to deep excavations in soft soil based on a new worldwide database. J. Jpn. Geotech. Soc. Soils Found. 44(1), 87–98 (2004)
Acknowledgements
The research described in this paper was financially supported by the National Natural Science Foundation of China (Grant No. 51408463), the Natural Science Foundation Research Project of Shaanxi province (Grant No. 2016JQ5091), and the Special Research Project of Education Department of Shaanxi Provincial Government (Grant No. 17JK0424).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mei, Y., Li, YL., Wang, XY. et al. Statistical Analysis of Deformation Laws of Deep Foundation Pits in Collapsible Loess. Arab J Sci Eng 44, 8347–8360 (2019). https://doi.org/10.1007/s13369-019-03931-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13369-019-03931-6