We investigate a deep foundation pit for urban substation construction in Chengdu, China. The pit was excavated in a sandy gravel layer and has a depth of 24.6 m. Detailed field surveys and monitoring were carried out to investigate the deformation characteristics of the foundation pit and its supporting structure related to excavation. Flac3D software was used to analyze the influence of pile anchor design parameters, including pile diameters, pile spacing, anchor cable prestress, anchor angle, and the number of rows of anchor cables, on deformation of the deep foundation pit. The results showed the pile diameter was the most critical influencing factor for pile deformation. The influences of anchor cable prestress and anchor angle on the horizontal displacement of the pile were inferior to the influence of the pile diameter and the number of anchor cable rows. The results reported in this paper provide guidance for the optimal design of foundation pits in settings with similar geological conditions.
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References
G. B. Liu, C. W. Ng, and Z. W. Wang, "Observed performance of a deep multistrutted excavation in Shanghai soft clays," Geotech. Geoenviron. Eng., 131, 1004-1013 (2005).
G. T. Kung, C. H. Juang, E. C. Hsiao, and Y. M. Hashash,"Simplified model for wall deflection and ground-surface settlement caused by braced excavation in clays," Geotech. Geoenviron. Eng, 133, 731-747 (2007).
Y. Tan and D. Wang, "Characteristics of a large-scale deep foundation pit excavated by the central-island technique in Shanghai soft clay. I: Bottom-up construction of the central cylindrical shaft," Geotech. Geoenviron. Eng, 139, 1875-1893 (2013).
A. J. Whittle, G. Corral, L. C. Jen, and R. P. Rawnsley, "Prediction and performance of deep excavations for courthouse station," Boston. J. Geotech. Geoenviron. Eng, 141, 04014123.1-04014123.13 (2015).
Z. Ding, J. K. **, and T. C. Han, "Analysis of the zoning excavation monitoring data of a narrow and deep foundation pit in a soft soil area," J. Geophys. Eng., 15, 1231-1231 (2018).
J. D. Niu, Z. W. Li, C. Feng, B. Wang, and K. Chen, "Combined support system and calculation model for deep foundation pits in fill soil areas," Arab. J. Geosci., 13 (2020).
B. C. B. Hsiung, "Observations of the ground and structural behaviors induced by a deep excavation in loose sands," Acta Geotech., 15, 1577-1593 (2020).
Z. Yang, S. Li, Y. Yu, X. Liu, and Y. Hu, "Study on the variation characteristics of the anchor cable prestress based on field monitoring in a foundation pit," Arab. J. Geosci., 13, 1269 (2020).
A. Chen, Q. Wang, Z. Chen, J. Chen, Z. Chen, and J. Yang, "Investigating pile anchor support system for deep foundation pit in a congested area of Changchun," Bulletin of Engineering Geology and the Environment, 80, 1125-1136 (2020).
J. Yang and D. Kong, "Deformation of deep and large foundation pit in soft soil of Fuzhou Subway," Arab. J. Geosci., 13 (2020).
L. L. Liu, R. Wu, S. S. C. Congress, Q. Du, G. Cai, and Z .Li, "Design optimization of the soil nail wall-retaining pileanchor cable supporting system in a large-scale deep foundation pit," Acta Geotech., 16, 2251-2274 (2021).
K. Choosrithong and H. F. Schweiger, "Numerical investigation of sequential strut failure on performance of Deep Excavations in soft soil," Int. J. Geomech., 20, 1-12 (2020).
GB 50497-2019. Technical standard for monitoring of building excavation engineering, Bei**g, China Planning Press (2019).
JGJ 120-2012.Technical specification for retaining and protection of building foundation excavation, Bei**g, China Architecture & Building Press (2012).
L. Guo, "Parameters optimization and numerical simulation of the pile-anchor supporting of foundation pit engineering in HengLong Square," Master Thesis, Shenyang: Northeastern University (2011).
L. W. Jiang, R. Q. Huang, and Q. Xu, "Study of several mechanics problems and related concepts in engineering design of anchored slide-resistant piles," Rock Soil Mech., 29, 1188-1194 (2008).
H. Y. Pan, "The pile-anchor supporting numerical simulated and supporting parameters design research," Master Thesis, Lanzhou: Lanzhou University (2018).
M. X. **e, J. J. Zheng and W. Z. Cao, "Analysis and optimization of anti-slide pile design parameter in combined retaining structure," J. Huazhong Univ. of Sci. & Tech. (Natural Science Edition), 47, 1-7 (2019).
H. X. Ma, "Numerical simulation and optimization analysis of pile-anchor support structure for deep foundation pit based on MIDAS/GTS," Master Thesis, Hebei: Hebei University of Engineering (2020).
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Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 2, March-April, 2024.
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**a, M., Lv, S.M. & Ren, G.M. Influence of Pile Anchor Design Parameters on Deformation of Deep Foundation Pit. Soil Mech Found Eng 61, 130–137 (2024). https://doi.org/10.1007/s11204-024-09953-z
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DOI: https://doi.org/10.1007/s11204-024-09953-z