JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

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Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata

Author(s): Pengfei LI, Chuang WANG, Xiaopu CUI, Qing XU, Zhaoguo GE, Shaohua LI
Affiliation(s): Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China; more
Corresponding email(s): cxp2021@emails.bjut.edu.cn
Key Words: Shield tunnel; Upper loose and lower dense strata; Excavation face stability; Water pressure ratio

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Pengfei LI, Chuang WANG, Xiaopu CUI, Qing XU, Zhaoguo GE, Shaohua LI. Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2400309

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author="Pengfei LI, Chuang WANG, Xiaopu CUI, Qing XU, Zhaoguo GE, Shaohua LI",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2400309"
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%0 Journal Article
%T Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata
%A Pengfei LI
%A Chuang WANG
%A Xiaopu CUI
%A Qing XU
%A Zhaoguo GE
%A Shaohua LI
%J Journal of Zhejiang University SCIENCE A
%P 471-491
%@ 1673-565X
%D in press
%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.A2400309"

TY - JOUR
T1 - Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata
A1 - Pengfei LI
A1 - Chuang WANG
A1 - Xiaopu CUI
A1 - Qing XU
A1 - Zhaoguo GE
A1 - Shaohua LI
J0 - Journal of Zhejiang University Science A
SP - 471
EP - 491
%@ 1673-565X
Y1 - in press
PB - Zhejiang University Press & Springer
ER -
doi="https://doi.org/10.1631/jzus.A2400309"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: Maintaining the stability of the excavation face is key for ensuring the safety of underwater shield tunnel construction. However, the majority of current studies on the stability of excavation face focus on the homogeneous strata, with limited research conducted on the upper loose and lower dense strata. Active instability tests are conducted in this study, in concert with the digital image correlation (DIC) technique, to investigate the effects of different water pressure ratios in upper loose and lower dense water-rich strata. The accuracy of these model tests is verified using numerical simulations. The results indicate that as water pressure ratio decreases, there is an increase in both the peak displacement of surface settlement and the seepage path range of water ahead of the excavation face expands. In contrast, decreasing water pressure ratio will break the limit equilibrium state of the strata faster, cause the earth pressure on the cutterhead to change more rapidly, and increase the instability range of the strata.

上松下密富水砂卵石地层盾构隧道开挖面的稳定模型试验

作者：李鹏飞¹，王闯¹，崔小普¹，徐晴¹，葛照国²，李少华³
机构：¹北京工业大学，城市与工程安全减灾省部共建教育部重点实验室，中国北京，100124；²中铁十四局集团大盾构工程有限公司，中国南京，211800；³中铁十五局集团有限公司，中国上海，200070
目的：确保水下盾构隧道施工安全的关键环节在于维持开挖面的稳定性，然而目前研究大多针对均质地层，很少有针对上部松散下部密实地层的开挖面稳定性研究。本文旨在探讨开挖面的水压比对隧道开挖面稳定性的影响，并针对上松下密富水砂卵石地层进行不同水压比条件下开挖面主动失稳的模型试验研究。
创新点：1.针对上松下密富水砂卵石地层进行了模型试验；2.结合数字图像相关技术，系统地分析了隧道开挖面的渐进失稳过程。
方法：1.通过模型试验，开展不同水压比条件下的开挖面主动失稳试验研究，并研究地表沉降、水压力、刀盘上的土压力和地层中的土压力随挡板后移距离的变化规律；2.通过数值模拟，建立与模型试验等大的数值模型，验证模型试验结果的准确性。
结论：1.在不同的水压比条件下，随着挡板后移距离的增加，地表沉降的峰值位移会经历三个阶段，即无沉降阶段、缓慢沉降阶段和快速沉降阶段；2.水压比的减小，会导致刀盘上土压力的变化更加迅速，并提前引起土体的整体失稳和位移；3.水压比的减小，会导致水的渗流路径范围和地层的失稳范围增大。

关键词组：盾构隧道；上松下密地层；开挖面稳定性；水压比

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Reference

[1]ChenRP, YinXS, TangLJ, et al., 2018. Centrifugal model tests on face failure of earth pressure balance shield induced by steady state seepage in saturated sandy silt ground. Tunnelling and Underground Space Technology, 81‍:315-325.

[2]ChengC, YangH, JiaPJ, et al., 2023. Face stability of shallowly buried large-section EPB box jacking crossing the Beijing-Hangzhou Grand Canal. Tunnelling and Underground Space Technology, 138:105200.

[3]CuiXP, LiPF, WuJ, et al., 2024. Stability analysis of a shield tunnel in unsaturated soil considering the soil arch effect. International Journal of Geomechanics, 24(4):04024041.

[4]DiQG, LiPF, ZhangMJ, et al., 2022. Analysis of face stability for tunnels under seepage flow in the saturated ground. Ocean Engineering, 266:112674.

[5]DiQG, LiPF, ZhangMJ, et al., 2023a. Experimental investigation of face instability for tunnels in sandy cobble strata. Underground Space, 10:199-216.

[6]DiQG, LiPF, ZhangMJ, et al., 2023b. Experimental study of face stability for shield tunnels in sandy cobble strata of different densities. Tunnelling and Underground Space Technology, 135:105029.

[7]DiQG, LiPF, ZhangMJ, et al., 2023c. Influence of permeability anisotropy of seepage flow on the tunnel face stability. Underground Space, 8:1-14.

[8]DiQG, LiPF, ZhangMJ, et al., 2024. Experimental study on the effect of seepage flow on the tunnel face stability in the saturated ground. Ocean Engineering, 299:117074.

[9]FuYB, ZengDQ, XiongH, et al., 2022. Seepage effect on failure mechanisms of the underwater tunnel face via CFD-DEM coupling. Computers and Geotechnics, 146:104591.

[10]HanKH, WangL, SuD, et al., 2021. An analytical model for face stability of tunnels traversing the fault fracture zone with high hydraulic pressure. Computers and Geotechnics, 140:104467.

[11]HeSH, ZhangSC, LiCH, et al., 2017. Blowout control during EPB shield tunnelling in sandy pebble stratum with high groundwater pressure. Chinese Journal of Geotechnical Engineering, 39(9):1583-1590 (in Chinese).

[12]HouCT, YangXL, 2022. 3D stability analysis of tunnel face with influence of unsaturated transient flow. Tunnelling and Underground Space Technology, 123:104414.

[13]HouCT, PanQJ, XuT, et al., 2022. Three-dimensional tunnel face stability considering slurry pressure transfer mechanisms. Tunnelling and Underground Space Technology, 125:104524.

[14]HouCT, YangXL, LiuMF, et al., 2023. Stability assessment of a non-circular tunnel face with tensile strength cut-off subject to seepage flows: a comparison analysis. Computers and Geotechnics, 163:105764.

[15]HuangMS, LiYS, ShiZH, et al., 2023. Tunnel face stability model for layered ground with confined aquifers. Tunnelling and Underground Space Technology, 132:104916.

[16]JiangYF, ZhouP, ZhouFC, et al., 2022. Failure analysis and control measures for tunnel faces in water-rich sandy dolomite formations. Engineering Failure Analysis, 138:106350.

[17]LeiHY, ZhangYJ, HuY, et al., 2021. Model test and discrete element method simulation of shield tunneling face stability in transparent clay. Frontiers of Structural and Civil Engineering, 15(1):147-166.

[18]LiPF, CuiXP, XiaJW, et al., 2023. Analytical solutions of limit support pressure and vertical earth pressure on cutting face for tunnels. Underground Space, 12:65-78.

[19]LiTZ, DiasD, LiZW, 2020. Failure potential of a circular tunnel face under steady-state unsaturated flow condition. Computers and Geotechnics, 117:103231.

[20]LiW, ZhangCP, TanZB, et al., 2021. Effect of the seepage flow on the face stability of a shield tunnel. Tunnelling and Underground Space Technology, 112:103900.

[21]LiX, XueYG, LiZQ, et al., 2023. Numerical investigation and prediction of the excavation face stability for river-crossing shield tunneling: an intelligent prediction model for limit support pressure. Computers and Geotechnics, 160:105493.

[22]LiZW, YangXL, LiTZ, 2019. Face stability analysis of tunnels under steady unsaturated seepage conditions. Tunnelling and Underground Space Technology, 93:103095.

[23]LinQT, LuDC, LeiCM, et al., 2021. Model test study on the stability of cobble strata during shield under-crossing. Tunnelling and Underground Space Technology, 110:103807.

[24]LiuW, AlbersB, ZhaoY, et al., 2016. Upper bound analysis for estimation of the influence of seepage on tunnel face stability in layered soils. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 17(11):886-902.

[25]LuXL, ZhouYC, HuangMS, et al., 2017. Computation of the minimum limit support pressure for the shield tunnel face stability under seepage condition. International Journal of Civil Engineering, 15(6):849-863.

[26]LüXL, ZhouYC, HuangMS, et al., 2018. Experimental study of the face stability of shield tunnel in sands under seepage condition. Tunnelling and Underground Space Technology, 74:195-205.

[27]MiB, XiangYY, 2020a. Analysis of the limit support pressure of a shallow shield tunnel in sandy soil considering the influence of seepage. Symmetry, 12(6):1023.

[28]MiB, XiangYY, 2020b. Model experiment and calculation analysis of excavation-seepage stability for shallow shield tunneling in sandy ground. Rock and Soil Mechanics, 41(3):837-848 (in Chinese).

[29]PanQJ, DiasD, 2018. Three dimensional face stability of a tunnel in weak rock masses subjected to seepage forces. Tunnelling and Underground Space Technology, 71:‍555-566.

[30]SohaeiH, HajihassaniM, NamaziE, et al., 2020. Experimental study of surface failure induced by tunnel construction in sand. Engineering Failure Analysis, 118:104897.

[31]TuSQ, LiW, ZhangCP, et al., 2023. Face stability analysis of tunnels in saturated soil considering soil-fluid coupling effect via material point method. Computers and Geotechnics, 161:105592.

[32]WanZE, LiSC, ZhaoSS, et al., 2022. Soil conditioning tests and screw conveyor spewing prevention technology of earth balance pressure shield tunneling in water-rich sandy stratum. China Civil Engineering Journal, 55(3):‍83-93 (in Chinese).

[33]WangL, HanKH, XieTW, et al., 2019. Calculation of limit support pressure for EPB shield tunnel face in water-rich sand. Symmetry, 11(9):1102.

[34]WengXL, SunYF, YanBH, et al., 2020. Centrifuge testing and numerical modeling of tunnel face stability considering longitudinal slope angle and steady state seepage in soft clay. Tunnelling and Underground Space Technology, 101:103406.

[35]WuJ, LiPF, YaoAJ, et al., 2023. Three-dimensional analytical solutions of non-Darcy seepage in front of a grouted subsea tunnel face. Computers and Geotechnics, 159:105509.

[36]YeZ, WuH, WangCX, et al., 2022. Limit face pressure analysis of an EPB shield under suffusion conditions. Tunnelling and Underground Space Technology, 130:104733.

[37]YinXS, ChenRP, MengFY, 2021. Influence of seepage and tunnel face opening on face support pressure of EPB shield. Computers and Geotechnics, 135:104198.

[38]ZhangSL, ChengXS, QiL, et al., 2022. Face stability analysis of large diameter shield tunnel in soft clay considering high water pressure seepage. Ocean Engineering, 253:111283.

[39]ZhangZH, XuWS, NieWT, et al., 2021. DEM and theoretical analyses of the face stability of shallow shield cross-river tunnels in silty fine sand. Computers and Geotechnics, 130:103905.

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上松下密富水砂卵石地层盾构隧道开挖面的稳定模型试验

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