Abstract
This study employs a series of finite element models and field monitoring data to systematically investigate the deformation characteristics and protective measures of railway subgrades adjacent to excavation sites for groups of foundation pits. A baseline model with a single foundation pit is established based on a project to erect a viaduct in an area with soft soil, and the model is verified by field monitoring data. The effects of the number of foundation pits, the distance between adjacent foundation pits, and the distance between a foundation pit and an adjacent railway subgrade are studied. The results show that increasing the number of foundation pits, reducing the distance between adjacent foundation pits and decreasing the distance between a foundation pit and the railway subgrade lead to excessive settlement and horizontal deformation of the subgrade. Three kinds of subgrade protection measures, namely, increasing the thickness of the retaining structure, setting isolation piles, and adding grouting reinforcement, are proposed and analysed. Increasing the thickness of the retaining structure significantly reduced the horizontal displacement and settlement of the subgrade.
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The data used to support the findings of this study are available from the corresponding author upon request.
References
ASTM (2000) Standard test method for determination of water (moisture) content of soil by direct heating. ASTM D4959. West Conshohocken, PA: ASTM
ASTM (2011) Standard test method for direct shear test of soils under consolidated drained conditions. ASTM D3080. West Conshohocken, PA: ASTM
ASTM (2018) Standard test method for laboratory determination of density (unit weight) of soil specimens. ASTM D7263. West Conshohocken, PA: ASTM
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
Ding Z, ** J, Han T (2018) Analysis of the zoning excavation monitoring data of a narrow and deep foundation pit in a soft soil area. J Geophys Eng 15(4):1231–1241
Gui Y, Zhao Z, Qin X, Wang J (2020) Study on deformation law of deep foundation pit with the top-down method and its influence on adjacent subway tunnel. Adv Civil Eng 2020:1–14. https://doi.org/10.1155/2020/8852336
Hashash YM, Levasseur S, Osouli A, Finno R, Malecot Y (2010) Comparison of two inverse analysis techniques for learning deep excavation response. Comput Geotech 37(3):323–333
Hu N, Dai G, Yan B, Liu K (2014) Recent development of design and construction of medium and long span high-speed railway bridges in China. Eng Struct 74:233–241 (in Chinese)
Indraratna B, Kan M, Potts D, Rujikiatkamjorn C, Sloan SW (2016) Analytical solution and numerical simulation of vacuum consolidation by vertical drains beneath circular embankments. Comput Geotech 80:83–96. https://doi.org/10.1016/j.compgeo.2016.06.008
Li L, Yang M, **ong J (2007) Analysis of the deformation characteristics of deep excavations in soft clay. China Civil Eng J 40(04):66–72. https://doi.org/10.15951/j.tmgcxb.2007.04.012
Li J, Lu S, Chen X (2022) Analysis of the influence of deep foundation excavation in soft soils on adjacent existing railway. Soil Eng Found 36(5):683–687
Liu Z, Zhang H (2017) PLAXIS 2D basic tutorial. Machinery Industry Press, Bei**g
Liu Y, **ang B, Fu M (2019) Observed performance of a large-scale deep triangular excavation in Shanghai soft clays. Geotech Geol Eng 37(4):2791–2809. https://doi.org/10.1007/s10706-018-00795-9
Ministry of Housing and Urban-Rural Development of the People’s Republic of China (2013) Code for monitoring measurement of urban rail transit engineering (GB50911-2013). China Architecture and Building Press, Bei**g
National Railway Administration of the People’s Republic of China (2014) Code for design of high-speed railway (TB10621-2014). China Railway Press, Bei**g
Ou CY, Hsieh PG, Chiou DC (1993) Characteristics of ground surface settlement during excavation. Can Geotech J 30(5):758–767. https://doi.org/10.1139/t93-068
Ou CY, Liao JT, Cheng WL (2000) Building response and ground movements induced by a deep excavation. Geotechnique 50(3):209–220. https://doi.org/10.1680/geot.2000.50.3.209
Shanghai Municipal Commission of Housing and Urban-rural Development (2018) Technical code for excavation engineering. Tongji University Press, China (in Chinese)
Song D, Chen Z, Dong L, Tang G, Zhang K, Wang H (2020) Monitoring analysis of influence of extra-large complex deep foundation pit on adjacent environment: a case study of Zhengzhou City, China. Geomatics Nat Hazards Risk 11(1):2036–2057. https://doi.org/10.1080/19475705.2020.1823492
Tan Y, Li X, Kang Z, Liu J, Zhu Y (2015) Zoned excavation of an oversized pit close to an existing metro line in stiff clay: case study. J Perform Constr Facil 29(6):1–19. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000652
Wang Z (2021) Numerical analysis of deformation control of deep foundation pit in Ulanqab city. Geotech Geol Eng 39:5325–5337. https://doi.org/10.1007/s10706-021-01836-6
Wang J, Xu Z, Wang W (2010) Wall and ground movements due to deep excavations in Shanghai soft soils. J Geotech Geoenviron Eng 136(7):985–994. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000299
Wang J, Chen J, Li M (2016) Concept and characters of deep excavation groups in urban underground space development. Jpn Geotech Soc Special Publ 2(44):1559–1562. https://doi.org/10.3208/jgssp.ATC6-07
Wu S, Ching J, Ou C (2013) Predicting wall displacements for excavations with cross walls in soft clay. J Geotech Geoenviron Eng 139(6):914–927. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000826
Xu Z, Wang W (2010) Selection of soil constitutive models for numerical analysis of deep excavations in close proximity to sensitive properties. Rock Soil Mech 31(01):258–264+326. https://doi.org/10.16285/j.rsm.2010.01.054. (in Chinese)
Xu Z, Wang J, Wang W (2009) Deformation behavior of deep excavations retained by bored pile wall in soft soil. Rock Soil Mech 30(05):1362–1366. https://doi.org/10.16285/j.rsm.2009.05.049. (in Chinese)
Yang X, Yu Q, Liu G, Zhu B (2013) Numerical simulation of ground settlement induced by different excavating sequences of foundation pits. J Jiamusi Univ (natural Science Edition) 31(06):803–806 (in Chinese)
Ye S, Zhao Z, Wang D (2021) Deformation analysis and safety assessment of existing metro tunnels affected by excavation of a foundation pit. Underground Space 6(4):421–431. https://doi.org/10.1016/j.undsp.2020.06.002
Zhang J, **e R, Zhang H (2018) Mechanical response analysis of the buried pipeline due to adjacent foundation pit excavation. Tunn Undergr Space Technol 78:135–145. https://doi.org/10.1016/j.tust.2018.04.026
Zhang X, Wei G, Jiang C (2020) The study for longitudinal deformation of adjacent shield tunnel due to foundation pit excavation with consideration of the retaining structure deformation. Symmetry 12(12):1–24. https://doi.org/10.3390/sym12122103
Zheng G, Deng X, Liu C, Liu Q (2014) Comparative analysis of influences of different deformation modes of retaining structures on displacement field of deep soils outside excavations. Chin J Geotech Eng 36(02):273–285. https://doi.org/10.11779/CJGE201402002. (in Chinese)
Zheng G, Yang X, Zhou H, Du Y, Sun J, Yu X (2018) A simplified prediction method for evaluating tunnel displacement induced by laterally adjacent excavations. Comput Geotech 95:119–128. https://doi.org/10.1016/j.compgeo.2017.10.006
Acknowledgements
The authors acknowledge the China Postdoctoral Science Foundation (Grant No.: 2022M712367), National Natural Science Foundation of China (Grant No. 52108336), Tian** University Independent Innovation Fund (Grant No.: 2022XYY-0003) for their support. The authors also sincerely thank the anonymous reviewers for their insightful comments and suggestions.
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Lei, H., Zhan, B., Feng, S. et al. Influence of Foundation Pit Groups’ Excavation on the Deformation Characteristics of Adjacent Railway Subgrade and Protection Measures. Geotech Geol Eng 41, 3877–3895 (2023). https://doi.org/10.1007/s10706-023-02493-7
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DOI: https://doi.org/10.1007/s10706-023-02493-7