Abstract
The protection of adjacent buildings is an important part of the safety control of the construction of a deep foundation pit in a subway station, and a reasonable supporting method is the key to safety control. Based on the deep foundation pit project of the Nanning Metro Line 5 station in Guangxi, this paper proposes a method of combined support of the isolation pile and the diaphragm wall for the protection of buildings adjacent to the foundation pit. The three-dimensional finite element method is used to simulate the deformation law of the foundation pit adjacent to the building under the combined support during the entire excavation process, and the deformation characteristics of the isolation pile-diaphragm wall are also analyzed. The results show that compared to the diaphragm wall support method, the combined support method effectively limits the soil settlement. The maximum value of soil settlement behind the diaphragm wall is only 0.044%He (He is the excavation depth), and the position of the maximum settlement has moved to the place which far away from adjacent buildings. The maximum deformation value of the combined support method is 59.1% less than that of the diaphragm wall method, and the additional deformation of the building is controlled within 9 mm. The combined support method of isolation pile and underground diaphragm wall proposed in this paper is applied to practical engineering, and the results of field monitoring agree well with the numerical results. Therefore, it is feasible to adopt this support method for the protection of buildings adjacent to the foundation pit.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Benz T (2006) “Small-strain stiffness of soils and its numerical consequences”, Ph.D. Dissertation, University of Stuttgart. Stuttgart.
Brinkgreve RBJ, Swolfs WMBL (2007) Plaxis 3d Foundation Material Models Manual 2nd Edn. Netherlands: PLAXIS BV
Chen JJ, Lei H, Wang JH (2014) Numerical analysis of the installation effect of diaphragm walls in saturated soft clay. Acta Geotech 9(6):981–991. https://doi.org/10.1007/s11440-013-0284-x
Dan K, Sahu RB (2018) Estimation of ground movement and wall deflection in braced excavation by minimum potential energy approach. Int J Geomech 18(7):04018068. https://doi.org/10.1061/(ASCE)GM.1943-5622.0001105
Guo PP, Gong XN and Wang YX (2019), “Displacement and force analyses of braced structure of deep excavation considering unsymmetrical surcharge effect”, Computers and Geotechnics 113, https://doi.org/10.1016/j.compgeo.2019.103102.
Houhou MN, Emeriault F, Belounar A (2019) Three-dimensional numerical back-analysis of a monitored deep excavation retained by strutted diaphragm walls. Tunn Undergr Space Technol 83:153–164. https://doi.org/10.1016/j.tust.2018.09.013
Hsieh PG, Ou CY (1998) Shape of ground surface settlement profiles caused by excavation. Can Geotech J 35(6):1004–1017. https://doi.org/10.1139/t98-056
Huang ZH, Yang L (2013) Analysis of deformation monitoring data from deep excavation for Guangxi university subway station. J Eng Geol 21(03):459–463 CNKI:SUN:GCDZ.0.2013-03-023
Jamsawang P, Jamnam S, Jongpradist P, Horpibulsuk S (2017) Numerical analysis of lateral movements and strut forces in deep cement mixing walls with top-down construction in soft clay. Comput Geotech 88:174–181. https://doi.org/10.1016/j.compgeo.2017.03.018
Jamsawang P, Voottipruex P, Tanseng P, Jongpradist P, Bergado TD (2019) Effectiveness of deep cement mixing walls with top-down construction for deep excavations in soft clay: case study and 3D simulation. Acta Geotech 14(1):225–246. https://doi.org/10.1007/s11440-018-0660-7
Leung EHY, Ng CWW (2007) Wall and ground movements associated with deep excavations supported by cast in situ wall in mixed ground conditions. J Geotech Geoenviron 133(2):129–143. https://doi.org/10.1061/(ASCE)1090-0241(2007)133:2(129
Li JL, Zhang ZX (2012) 3D numerical analysis of deep station excavation constructed in round gravel strata, J Undergr Space Eng,8(01),71-76+110. CNKI:SUN:BASE.0.2012-01-011.
Lim A, Ou CY (2016) Stress paths in deep excavations under undrained conditions and its influence on deformation analysis. Tunn Undergr Space Technol 63:118–132. https://doi.org/10.1016/j.tust.2016.12.013
Liu GB, Guo J, Li MY (2019) Measured behaviors of an oversized irregular basement excavation and its surrounding responses in thick soft clay. Arab J Geosci 13(4):0401805–0401236. https://doi.org/10.1007/s12517-019-4979-7
Mair RJ (1993) “Developments in geotechnical engineering research: application to tunnels and deep excavations. In Proceedings of the Institution of Civil Engineers”, Proceedings of the Institution of Civil Engineers - Civil Engineering.,97(1), 27-41. https://doi.org/10.1680/icien.1993.22378
Moorak S, Edward JC (2005) Estimation of building damage due to excavation-induced ground movements. J Geotech Geoenviron 131(2):162–177. https://doi.org/10.1061/(ASCE)1090-0241(2005)131:2(162)
Reza R, Amin TM(2021) “Horizontal displacement of urban deep excavated walls supported by multistrands anchors, steel piles, and in situ concrete piles: Case Study”, Int J Geomech 21(1), https://doi.org/10.1061/(ASCE)GM.1943-5622.0001890
Shi JW, Liu GB, Huang P, Charles WWN (2015) Interaction between a large-scale triangular excavation and adjacent structures in Shanghai soft clay. Tunn Undergr Space Technol 50:282–295. https://doi.org/10.1016/j.tust.2015.07.013
Tan Y, Li MW (2011) Measured performance of a 26 m deep top-down excavation in downtown Shanghai. Can Geotech J 48(5):704–719. https://doi.org/10.1139/t10-100
Tan Y, Wang DL (2013) 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. J Geotech Geoenviron 139(11):1875–1893. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000928
Wang JH, Xu ZH, Wang WD (2010) Wall and ground movements due to deep excavations in Shanghai soft soils. J Geotech Geoenviron 136(7):985–994. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000299
Wang ZW, Charles WWN, Liu GB (2005) Characteristics of wall deflections and ground surface settlements in Shanghai. Can Geotech J 42(5):1243–1254. https://doi.org/10.1139/t05-056
Yang L, Huang ZH, Xie XY (2020) Elastic subgrade mode of deep excavation in gravel area based on centrifuge testing and numerical simulation. J Eng Geol. https://doi.org/10.13544/j.cnki.jeg.2020-022
Acknowledgements
The authors would like to acknowledge the financial supports from National Natural Science Foundation of China (Nos.51678166 and 51508113) and the Guangxi Key Project of Nature Science Foundation (No.2020GXNSFDA238024).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare no competing interests.
Additional information
Responsible Editor: Zeynal Abiddin Erguler
Rights and permissions
About this article
Cite this article
Ma, S., Fu, X., Lu, H. et al. A combined support method of isolation pile and diaphragm wall for protection of buildings adjacent to deep foundation pit. Arab J Geosci 14, 2005 (2021). https://doi.org/10.1007/s12517-021-08345-z
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12517-021-08345-z