Influence of water-rich tunnel by shield tunneling on existing bridge pile foundation in layered soils

Abstract

At present, shield tunneling often needs to pass through a large number of bridge pile foundations. However, there are few studies on the influence of shield tunneling on adjacent pile foundations by combining with groundwater seepage. Based on Winkler model, the calculation equations of shield tunneling on vertical and horizontal displacement of adjacent bridge pile are derived. Meanwhile, full and part three-dimensional finite element models are established to analyze the trend of bridge pier settlement, ground surface settlement trough, vertical and horizontal displacement of the pile and pile stress under three calculation conditions, i.e., not considering groundwater effect, considering stable groundwater effect and fluid-soil interaction. The results show that the calculated value is small when the effect of groundwater is not considered; the seepage velocity of the soil above the excavation face is faster than that of the surrounding soil under fluid-soil interaction, and after the shield passing, the groundwater on both sides shows a flow trend of “U” shape on the ground surface supplying to the upper part of the tunnel; the vertical displacement of the pile body is bounded by the horizontal position of the top of the tunnel, the upper pile body settles, and the lower pile body deforms upward. The horizontal displacement of pile body presents a continuous “S” shape distribution, causing stress concentration near the tunnel. The calculated results of fluid-soil interaction are in good agreement with the field measured data and accord with the actual situation.

Keywords

shield tunnel / bridge pile foundation / Winkler model / fluid-soil interaction / numerical analysis

References

[1] DingZ, WeiX J, WeiG. Prediction methods on tunnel-excavation induced surface settlement around adjacent building [J]. Geomechanics and Engineering, 2017, 12(2): 185-195

[2] LiuC H, BezuijenA, YangM, CachimP. Elastic analysis of ground movements around a tunnel considering a buoyant lining moving upwards [J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2019, 43: 1562-1575

[3] SuY, SuY H, ZhaoM H, VlachopoulosN. Tunnel stability analysis in weak rocks using the convergence confinement method [J]. Rock Mechanics and Rock Engineering, 2021, 54: 559-582

[4] MuL L, HuangM S, FinnoR J. Tunneling effects on lateral behavior of pile rafts in layered soil [J]. Tunneling and Underground Space Technology, 2012, 28: 192-201

[5] ZhangZ G, XuC, GongJ F. Influence of tunneling on deflection of adjacent piles considering shearing displacement of foundation and 3D effects of lateral soils beside piles [J]. Chinese Journal of Geotechnical Engineering, 2016, 38(5): 846-856(in Chinese)

[6] ZhangZ G, HuangM S, XuC, JiangY J, WangW D. Simplified solution for tunnel-soil-pile interaction in Pasternak’s foundation model [J]. Tunneling and Underground Space Technology, 2018, 78: 146-158

[7] NgC W W, LuH, PengS Y. Three-dimensional centrifuge modelling of the effects of twin tunnelling on an existing pile [J]. Tunnelling and Underground Space Technology, 2013, 35: 189-199

[8] FranzaA, MarshallA M. Centrifuge and real-time hybrid testing of tunneling beneath piles and piled buildings [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2019, 145(3): 04018110

[9] SongG Y, MarshallA M. Centrifuge study on the influence of tunnel excavation on piles in sand [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2020, 1461204020129

[10] SoomroM A, MangiN, XiongH, KumarM, MangnejoD A. Centrifuge and numerical modelling of stress transfer mechanisms and settlement of pile group due to twin stacked tunneling with different construction sequences [J]. Computers and Geotechnics, 2020, 121: 103449

[11] SoomroM A, HongY, NgC W W, LuH, PengS Y. Load transfer mechanism in pile group due to single tunnel advancement in stiff clay [J]. Tunneling and Underground Space Technology, 2015, 4563-72

[12] SoomroM A, NgC W W, LiuK, MemonN A. Pile responses to side-by-side twin tunneling in stiff clay: Effects of different tunnel depths relative to pile [J]. Computers and Geotechnics, 2017, 84101-116

[13] MeschkeG, NinićJ, StascheitJ, AlsahlyA. Parallelized computational modeling of pile-soil interactions in mechanized tunneling [J]. Engineering Structures, 2013, 47: 35-44

[14] KhabbazH, GibsonR, FatahiB. Effect of constructing twin tunnels under a building supported by pile foundations in the Sydney central business district [J]. Underground Space, 2019, 4(4): 261-276

[15] YangM, SunQ, LiW C, MaK. Three-dimensional finite element analysis on effects of tunnel construction on nearby pile foundation [J]. Journal of Central South University of Technology, 2011, 18(3): 909-916

[16] ZhaoM H, LiuD P, ZhangL, JiangC. 3D finite element analysis on pile-soil interaction of passive pile group [J]. Journal of Central South University of Technology, 2008, 15(1): 75-80

[17] JongpradistP, KaewsriT, SawatparnichA, SuwansawatS, YouwaiS, KongkitkulW, SunitsakulJ. Development of tunneling influence zones for adjacent pile foundations by numerical analyses [J]. Tunneling and Underground Space Technology, 2013, 34: 96-109

[18] ZhaoB Y, WangX P, ZhangC, LiW C, AbbassiR, ChenK. Structural integrity assessment of shield tunnel crossing of a Railway Bridge using orthogonal experimental design [J]. Engineering Failure Analysis, 2020, 114: 104594

[19] WangZ, ZhangK W, WeiG, LiB, LiQ, YaoW J. Field measurement analysis of the influence of double shield tunnel construction on reinforced bridge [J]. Tunneling and Underground Space Technology, 2018, 81252-264

[20] SirivachirapornA, PhienwejN. Ground movements in EPB shield tunneling of Bangkok subway project and impacts on adjacent buildings [J]. Tunneling and Underground Space Technology, 2012, 30: 10-24

[21] ZhangX M, YangJ S, ZhangY X, GaoY F. Cause investigation of damages in existing building adjacent to foundation pit in construction [J]. Engineering Failure Analysis, 2018, 83: 117-124

[22] ZhouD Q, FengC X. Engineering characteristics and reinforcement program of inclined pre-stressed concrete pipe piles [J]. KSCE Journal of Civil Engineering, 2019, 23(9): 3907-3923

[23] HuangK, SunY W, HeJ, HuangX Q, JiangM, LiY J. Comparative study on grouting protection schemes for shield tunneling to adjacent viaduct piles [J]. Advances in Materials Science and Engineering, 2021, 2021: 5546970

[24] HuangK, SunY W, HuangX Q, LiY J, JiangM, LiuK N. Effects of different construction sequences on ground surface settlement and displacement of single long pile due to twin paralleled shield tunneling [J]. Advances in Civil Engineering, 2021, 20215559233

[25] LiX F, DuS J, ChenB. Unified analytical solution for deep circular tunnel with consideration of seepage pressure, grouting and lining [J]. Journal of Central South University, 2017, 24(6): 1483-1493

[26] WuC Z, HongY, ChenQ S, KarekalS. A modified optimization algorithm for back analysis of properties for coupled stress-seepage field problems [J]. Tunneling and Underground Space Technology, 2019, 94103040

[27] YangX L, HuangF. Stability analysis of shallow tunnels subjected to seepage with strength reduction theory [J]. Journal of Central South University of Technology, 2009, 16(6): 1001-1005

[28] ZhangF S, WangT, LiuF, PengM, FurtneyJ, ZhangL M. Modeling of fluid-particle interaction by coupling the discrete element method with a dynamic fluid mesh: Implications to suffusion in gap-graded soils [J]. Computers and Geotechnics, 2020, 124103617

[29] WangY C, LiZ Y, JingH W, LiY B, WangM T. Study on the seepage characteristics of deep buried tunnels under variable high-pressure water heads [J]. Bulletin of Engineering Geology and the Environment, 2021, 801477-1487

[30] LiZ, LuoZ J, XuC H, TanJ Z. 3D fluid-solid full coupling numerical simulation of soil displacement induced by shield tunneling [J]. Tunneling and Underground Space Technology, 2019, 90: 174-182

[31] HuangK, YangW J, MaQ A, AnY L, LiY, ZhouJ W, QiuL. Influence of foundation excavation pit on adjacent metro tunnel using fluid-solid mechanics theory [J]. Journal of Central South University (Science and Technology), 2019, 50(1): 198-205(in Chinese)

[32] AnY L, ZhouJ, OuyangP B, LiJ H. Analysis of tunnel face stability with the advanced pipes support [J]. Journal of Central South University, 2021, 28(2): 604-617

[33] LoganathanN, PoulosH G. Analytical prediction for tunneling-induced ground movements in clays [J]. Journal of Geotechnical and Geoenvironmental Engineering, 1998, 124(9): 846-856