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Journal articles on the topic 'Tunnel face'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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1

Zhang, Zhien, Mingli Huang, Chunbo Yu, and Xiaojian Fu. "Study on the Face Stability of a Metro Tunnel in a Silty Clay Layer Constructed Using the Full-Face Method." Symmetry 13, no. 6 (2021): 1069. http://dx.doi.org/10.3390/sym13061069.

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The horizontal displacement of the soil at the face of the subway tunnel is symmetrically distributed along the central axis of the tunnel, which is larger in the middle and smaller at both sides. The displacement is related to the size of the excavation face. If the excavation area is too great, the horizontal displacement of the tunnel face will be too large, easily leading to tunnel face collapse. For this reason, tunnel builders often use the core-keeping ring-cut method to build subway tunnels. A large section is divided into several small sections to reduce the soil displacement caused b
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2

Du, Jun, Zhi Rong Mei, and Yong Zhao Chen. "Tunnel Face Stability Study in Soft Shallow Tunnel." Advanced Materials Research 1079-1080 (December 2014): 170–76. http://dx.doi.org/10.4028/www.scientific.net/amr.1079-1080.170.

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With Xiamen Jiaheyuan underground access as the project background, tunnel face stability of soft shallow tunnel was analyzed under the condition of no pre-reinforcement by means of three-dimensional finite element method. The results indicated that the ground was relaxed because the tensile stress appeared in front and top of tunnel face after excavation, at the same time, the ground into the plastic state around the tunnel face. From the point of view of deformation, the displacement of tunnel face were such as the longitudinal horizontal displacement reached the maximum, the vertical deposi
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3

Han, Kaihang, Xuetao Wang, Beibei Hou, Xingtao Lin, and Chengyong Cao. "Analysis of Instability Mode and Limit Support Pressure of Shallow Tunnel Face in Sands." Symmetry 12, no. 12 (2020): 2067. http://dx.doi.org/10.3390/sym12122067.

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The stability analysis of the tunnel face is not only essential for guaranteeing the safe construction of urban shallow tunnels, but also directly affecting the influence degree of tunnel construction on nearby structures. The primary concerns in the stability analysis of the tunnel face are the instability mode of surrounding rocks and the limit support pressure on the tunnel face. In this paper, face stability of shallow tunnels in sands was conducted using a symmetrical model test. The ground surface settlement, support pressure on the tunnel face and progressive instability modes of sands
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4

Pang, Yongkang, Hang Lin, Ping Cao, and Gang Meng. "The Influence of Overlying High-Speed Rail Dynamic Loads on the Stability of Shield Tunnel Faces During Excavation." Applied Sciences 15, no. 5 (2025): 2567. https://doi.org/10.3390/app15052567.

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This study investigates the stability of multilayer shield tunnels beneath high-speed railway bases, with a particular focus on the influence of dynamic loads induced by high-speed rail vibrations and shield thrust. A self-designed scale test apparatus was employed to simulate the effects of these dynamic loads on tunnel soil stability, face integrity, formation stress, deformation, and settlement. The experimental setup was specifically designed to accurately replicate the deformation characteristics of the tunnel face and surrounding strata under the combined influence of shield tunneling an
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5

Wen, Sen, Chao Yan, and Yu Qing Yuan. "Study on Deformation of Rock Tunnel Face." Applied Mechanics and Materials 170-173 (May 2012): 1665–68. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.1665.

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Few researchers study on deformation of rock tunnel face. The tunnel face is stable for small section shallow tunnel, but it shouldn’t be ignored when tunnels for large diameter are driven in weak rock mass. In this paper, dilatancy angle taken into account, FLAC3D is used to do 100 groups of numerical tests which are designed by orthogonal design method. According to test results, the formula for maximum deformation of tunnel face and test parameters are fitted by nonlinear regression method. Test value and predictive value have good correlation.
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6

Man, Jianhong, Hongwei Huang, and Jiayao Chen. "A fast and automatic establishment method of the calculation formula for the tunnel face safety factor based on analytical solution." IOP Conference Series: Earth and Environmental Science 1331, no. 1 (2024): 012006. http://dx.doi.org/10.1088/1755-1315/1331/1/012006.

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Abstract Assessing rock tunnel face stability when constructing mountain tunnels is of utmost importance because it is influenced by various factors, including the tunnel diameter, depth, excavation dimension, geological strength index, uniaxial compressive strength, and Hoek-Brown constant. This study established a tunnel face stability database based on analytical solutions that considered the correlation between the influencing parameters. Finally, a safety factor prediction equation was constructed by combining response surface methodology and the multivariate adaptive regression spline al
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7

Xie, Tingwei, and Kaihang Han. "Two-Dimensional Numerical Model for Stability Analysis of Tunnel Face Based on Particle Flow Code." Symmetry 13, no. 1 (2021): 94. http://dx.doi.org/10.3390/sym13010094.

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In this paper, numerical simulations of face stability of shallow tunnels are carried out by using the particle discrete element codes PFC2D from the microscopic view. Progressive instability of the tunnel face is achieved through the withdrawal of the baffle used to simulate the tunnel face. Under different retreating displacement of the tunnel face, the evolution laws of support pressure on the tunnel face, the ground deformation, ground surface settlement and contact force chain in front of the tunnel face are studied. The results show that with the withdrawal of the tunnel face, the suppor
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8

Xie, Tingwei, and Kaihang Han. "Two-Dimensional Numerical Model for Stability Analysis of Tunnel Face Based on Particle Flow Code." Symmetry 13, no. 1 (2021): 94. http://dx.doi.org/10.3390/sym13010094.

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In this paper, numerical simulations of face stability of shallow tunnels are carried out by using the particle discrete element codes PFC2D from the microscopic view. Progressive instability of the tunnel face is achieved through the withdrawal of the baffle used to simulate the tunnel face. Under different retreating displacement of the tunnel face, the evolution laws of support pressure on the tunnel face, the ground deformation, ground surface settlement and contact force chain in front of the tunnel face are studied. The results show that with the withdrawal of the tunnel face, the suppor
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9

Zhou, Yuan, Yuming Zhu, Shumao Wang, Hu Wang, and Zhengxing Wang. "Rotational Failure Mechanism for Face Stability of Circular Shield Tunnels in Frictional Soils." Advances in Civil Engineering 2019 (March 7, 2019): 1–14. http://dx.doi.org/10.1155/2019/7167802.

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Face stability analyses of shield-driven tunnels are often carried out to determine the required support pressure on the tunnel face. Although various three-dimensional mechanisms have been proposed for circular faces of tunnels in frictional and/or cohesive soils to obtain the limit support pressure, the most critical one has not yet been found. Based on a rotational failure mechanism for the frictional soils, this paper modifies the circular cross section as an ellipse to make the generating collapse surface inscribe the entire circular tunnel face. Using the kinematical approach of limit an
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10

SATO, Jun, Hutoshi KUSUMOTO, Tsuyoshi DOMON, and Kazuo NISHIMURA. "STABILIZATION OF TUNNEL FACE WITH CURVED TUNNEL FACE." Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering) 71, no. 1 (2015): 1–13. http://dx.doi.org/10.2208/jscejte.71.1.

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11

Xie, Yi, Hong Liao, and De Zhou. "Temperature Effect on Stability of Tunnel Face Under Unsaturated Seepage Condition." Applied Sciences 15, no. 1 (2024): 298. https://doi.org/10.3390/app15010298.

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As tunnel excavation technology matures and the demand for transportation infrastructure continues to grow, several high-temperature tunnels have successively emerged in high geothermal areas. The construction of tunnels in high-temperature regions is gradually becoming a new challenge encountered in the engineering field. This study aims to conduct a stability analysis of tunnel face excavation under different temperatures. In addition, soil is often considered to be unsaturated. A framework for assessing the stability of tunnel faces in unsaturated soils under fluctuating temperature conditi
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12

Huang, Qingfei, and Kaihang Han. "Progressive Failure Mechanism of Shield Tunnel Face in Complex Urban Geological Environment." Buildings 14, no. 5 (2024): 1356. http://dx.doi.org/10.3390/buildings14051356.

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The construction of multiple tunnels across inland rivers has had a significant influence on the improvement of the transportation infrastructure. The technology for constructing tunnels is progressing towards the development of larger cross-sections, longer distances, and the ability to withstand high hydraulic pressure in complex hydrogeological conditions, including high-permeability strata. In order to ensure the face stability of shield tunnels under high hydraulic pressure that crosses a fault fracture zone, it is necessary to study the progressive failure mechanism of shield tunnel face
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13

Zhao, Shuanfeng, Bo Liu, Bowen Ren, et al. "Three-Dimensional ERT Advanced Detection Method with Source-Position Electrode Excitation for Tunnel-Boring Machines." Sensors 24, no. 10 (2024): 3213. http://dx.doi.org/10.3390/s24103213.

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Tunnel-boring machines (TBMs) are widely used in urban underground tunnel construction due to their fast and efficient features. However, shield-tunnel construction faces increasingly complex geological environments and may encounter geological hazards such as faults, fracture zones, water surges, and collapses, which can cause significant property damage and casualties. Existing geophysical methods are subject to many limitations in the shield-tunnel environment, where the detection space is extremely small, and a variety of advanced detection methods are unable to meet the required detection
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14

Ma, Shaokun, Zhang Zhou, Zhibo Duan, et al. "Study on the Influence Characteristics of Excavation Face Instability of New Tunnels Orthogonally Crossing Existing Tunnels." Applied Sciences 14, no. 22 (2024): 10521. http://dx.doi.org/10.3390/app142210521.

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This study aims to solve the problem of stability of the excavation surface of a new tunnel crossing an existing tunnel orthogonally. The relative horizontal spacing between the two tunnels is taken as an influencing factor, and transparent soil model tests are conducted and expanded with numerical simulations. Finally, the active destabilization mechanism and influence characteristics of the excavation surface of the two tunnels at different horizontal spacings, vertical spacings, and tunnel diameter ratios are obtained. The results show that when the excavated face is destabilized, the exist
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15

Tu, Xiao Ming, Yu You Yang, and Gui He Wang. "Face Stability Analysis of Rectangular Tunnels Driven by a Pressurized Shield." Advanced Materials Research 378-379 (October 2011): 461–65. http://dx.doi.org/10.4028/www.scientific.net/amr.378-379.461.

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With the development and utilization of underground space, some new tunnel forms are emerging, such as the rectangular tunnel, double tunnels, treble tunnels and so on. The aim of this paper is to determine the collapse face pressure of a rectangular tunnel driven by a pressurized shield. The calculation is based on the upper-bound method of the limit analysis theory. A translational kinematically admissible failure mechanism consists a sequence of truncated rigid cones are considered for the calculation schemes. The numerical results obtained by the calculation are presented.
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16

Li, Shang, Bing Dai, Yuzhou Hou, and Danli Li. "Spatiotemporal Stability Responses of Tunnel Excavation Under Cyclical Footage Impact: A FLAC3D-Based Numerical Study." Applied Sciences 15, no. 14 (2025): 7661. https://doi.org/10.3390/app15147661.

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Cyclical footage, a fundamental parameter in tunnel construction, has received limited attention despite its critical role in ensuring excavation stability and safety. To investigate the underlying mechanisms by which different cyclical footage values influence the stability of deeply buried tunnels, the Fast Lagrangian Analysis of Continua in Three Dimensions (FLAC3D) was employed to simulate the spatiotemporal evolution of tunnel responses during excavation. The simulation results reveal that each cyclical footage scenario produces a “segmental decline” pattern in tunnel displacement. Unlike
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17

Yaman, Hasan Eray, and Cemalettin Okay Aksoy. "Evaluation of Symmetrical Face Pressure of EPB." Symmetry 16, no. 4 (2024): 484. http://dx.doi.org/10.3390/sym16040484.

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The content of this study combines city safety, optimum excavation situation, mining, geology, and civil engineering principles. Tunnel boring machines (TBM) are the most commonly used machines in the excavation of urban tunnels. These machines prevent the inward movement of the tunnel face and control the amount of settlement formed on the ground by applying pressure to the tunnel face. The most important question here is to determine the amount of pressure to be applied to the tunnel face. There are many widely accepted formulas used in the calculation of the face pressure and these formulas
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18

Zhou, Guan-Nan, Teng-Tian Yang, Ze Sun, et al. "Investigation of Quantitative Evaluation Method and Engineering Application of Shallow Buried Tunnel Face Stability." Applied Sciences 12, no. 13 (2022): 6656. http://dx.doi.org/10.3390/app12136656.

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The stability of a tunnel face and the rationality of its supporting structures are the guarantees for safe tunnel construction. This paper established a quantitative analysis model of tunnel face stability, obtained the calculation formula of the tunnel face stability coefficient based on the silo theory of surrounding rock, and then realized the quantitative description of stability of the tunnel face under the condition of a pipe roofing support, bolting support, grouting support and reserved core soil. Finally, a tunnel face stability discrimination and support optimization system was deve
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19

Zhang, Guangming. "Research on Multi-Functional Excavation Trolley for High-speed Railway Double-Track Tunnel." Journal of Architectural Research and Development 9, no. 3 (2025): 165–71. https://doi.org/10.26689/jard.v9i3.10781.

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With the rapid development of high-speed railway tunnel construction mileage and technology, the construction of the tunnel face is a key part of tunnel construction in high-speed railway tunnel projects. As mechanization and intelligence levels continue to increase, supporting equipment mainly includes rock drilling trolleys, arch installation trolleys, wet spraying robots, anchor trolleys, etc. To address the issues of high construction costs and the need to replace equipment for different processes, this paper designs an economical and practical multi-functional integrated trolley for high-
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20

Zhang, Zhiqiang, Huayun Li, Hongyu Yang, and Bo Wang. "Failure modes and face instability of shallow tunnels under soft grounds." International Journal of Damage Mechanics 28, no. 4 (2018): 566–89. http://dx.doi.org/10.1177/1056789518773135.

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For shallow tunnels under soft grounds, it is very difficult to gain a complete understanding on all the load-bearing arch effects during excavation, since such tunnels can easily deform or even collapse. Among these effects, the tunnel face stability plays the most important role and has not been understood and handled very well; therefore, the design and construction of such tunnels under soft grounds remain as a challenge. In this work, the different failure models of face instability of the shallow tunnels were established based on the upper-bound theorem of limit analysis for the formatio
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21

Wang, Lin, Kaihang Han, Tingwei Xie, and Jianjun Luo. "Calculation of Limit Support Pressure for EPB Shield Tunnel Face in Water-Rich Sand." Symmetry 11, no. 9 (2019): 1102. http://dx.doi.org/10.3390/sym11091102.

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With the rapid development of the tunnels constructed under the rivers and seas, the research on face stability of shield tunnel in water-rich sand has important theoretical value and engineering application significance. In addition to the loads exerted by overlaying strata, the tunnels constructed in water-rich strata are usually subjected to high hydrostatic pressure or seepage forces, which are apt to cause the ground collapse of the shield tunnel face. The distribution of hydraulic head field around the tunnel face is critical to assess the impacts of the seepage forces on the tunnel face
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22

Sina, Lotfollahi, Khanahmadloo Ehsan, and Hoseini Toodashki Vahid. "The Effect of Non-Simultaneous Excavation of Closely-Spaced Twin Tunnels on Ground Surface Settlement." Journal of Civil Engineering and Materials Application 3, no. 1 (2019): 33–41. https://doi.org/10.22034/JCEMA.2019.92025.

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Tunnel excavation on soil lands may leads to horizontal and vertical displacements around the tunnel. The displacements can reach the ground surface and cause damages to existing structures on the ground. Hence it is so important to estimate the ground settlement induced by excavation, particularly in urban environments. In this study, the effect of longitudinal distance between two tunnel faces on ground surface settlement is examined during the excavation of twin tunnels. Accordingly, the ground settlement is measured for the states where the distance between tunnel faces is 0D, 0.5D, 1D, 1.
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23

Do, Thai Ngoc, Protosenya Anatoliy Grigorevich, and Chinh Cong Thi Vo. "Prediction of ground surface settlement induced by twin tunnelling in urban areas." Journal of Mining and Earth Sciences 63, no. 3a (2022): 22–28. http://dx.doi.org/10.46326/jmes.2022.63(3a).03.

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Tunnelling in urban areas is growing in response to efficient transportation, many urban tunnels are constructed in soft ground at shallow depths. Urban tunnels are usually constructed as twin-parallel tunnels and their adjacent constructions may cause ground settlements that distort and damage the existing structures and utilities above the tunnel. In the past few decades, tunnel boring machines have been used to drill in increasingly difficult geotechnical conditions such as soft ground like soft clay. Metro Line 3 of the Hanoi metro system is designed of twin tunnels horizontally aligned in
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24

Meguid, M. A., and R. K. Rowe. "Stability of D-shaped tunnels in a Mohr–Coulomb material under anisotropic stress conditions." Canadian Geotechnical Journal 43, no. 3 (2006): 273–81. http://dx.doi.org/10.1139/t06-004.

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The near-face stability of D-shaped tunnels excavated in a Mohr–Coulomb material subjected to anisotropic in situ stress conditions is investigated in the present study. The construction of the intake tunnel of the Darlington Nuclear Generating Station is analyzed using three-dimensional elasto-plastic finite element analysis. The induced displacement and stresses around the tunnel opening as the face advances are compared to the field measurements recorded during the tunnel excavation. The effect of rock mass strength reduction on the tunnel deformation, face stability, and distribution of st
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25

Han, Kaihang, Xuetao Wang, Beibei Hou, Cheng-yong Cao, and Xing-Tao Lin. "Stability Analysis of Tunnel Face Reinforced with Longitudinal Fiberglass Dowels Together with Steel Pipe Umbrella." Symmetry 12, no. 12 (2020): 2069. http://dx.doi.org/10.3390/sym12122069.

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When tunnels are constructed under difficult geotechnical conditions in urban areas, tunnel face stability is one of the main issues to be addressed. To ensure tunnel face stability and reduce the impact of tunneling on adjacent structures, a few alternative procedures of ground reinforcement should be adopted, which includes reinforcing the soil ahead of the face using longitudinal fiberglass dowels alone or together with a steel pipe umbrella. It is of great academic value and engineering signification to reasonably determine the limit reinforcement density of these ground reinforcements. In
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26

Xie, Yi, Hong Liao, and De Zhou. "Face Stability Analysis for Tunnels under Steady Unsaturated Seepage and Inhomogeneity Conditions." Applied Sciences 14, no. 20 (2024): 9377. http://dx.doi.org/10.3390/app14209377.

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In the field of tunnels, the stability of tunnel faces is generally considered in dry, saturated and homogeneous soils. However, the actual condition of some soils has been found to be inhomogeneous, with unsaturated seepage. In this paper, an analytical method is applied to estimate the safety factor when the supporting force at the tunnel face is zero under steady unsaturated seepage and inhomogeneous conditions. This method combines kinematic limit analysis techniques with strength reduction techniques; an efficient stress formulation utilizing suction stress is employed to determine the ap
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27

Chen, C. N., and W. Y. Huang. "Investigation of Tunnel Stress Path During Face Advancement." Journal of Mechanics 23, no. 4 (2007): 451–58. http://dx.doi.org/10.1017/s1727719100001507.

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AbstractTunnel stress path during excavation was investigated in the study scope. The triple-center section is commonly designated for highway tunnels, but the analytical solution of the stress state for a non-circular tunnel section with multiple bench excavations is difficult to obtain. Our investigation provides an algorithmic procedure which reliably evaluates stress adjustment of a bench excavation with respect to the three-dimensional state of stress. Evaluation of a safety factor at the tunnel face during advancement is performed following the stress path and principal stress space.
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28

Ng, C. W. W., and K. S. Wong. "Investigation of passive failure and deformation mechanisms due to tunnelling in clay." Canadian Geotechnical Journal 50, no. 4 (2013): 359–72. http://dx.doi.org/10.1139/cgj-2012-0098.

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It is essential to prevent failures at a tunnel face during tunnel construction to protect existing structures and underground utilities. Many studies have investigated active failure in clay, but passive failure is often overlooked. The objectives of this study are to investigate passive failure as well as surface heave and excess pore-water pressure induced by tunnel face displacement in a geotechnical centrifuge. Long-term settlement and dissipation of excess pore-water pressure after passive failure are also investigated. For a tunnel located at a cover to diameter ratio of 2.1, soil in fr
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29

Pawar, Mrs Neha, Ms Pranjal Kamble, ,. Ms Disha Shelar, Ms Urmila Dukre, Ms Komal Dhawale, and ,. Ms Nandini Patole. "Submerged Tunnel." International Scientific Journal of Engineering and Management 04, no. 03 (2025): 1–7. https://doi.org/10.55041/isjem02493.

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A Submerged Tunnel or Submerged Floating Tunnel (SFT) is a progressive engineering solution across deep sea, river, etc. were conventional bridges and immersed tunnels face limitations. Which is also known as Archimedes bridge. It is based on buoyancy principles, they offer several advantages like minimum environmental disturbance, economical in cost and adapting underwater conditions. The design, challenges in construction, and advantages are overviewed in this paper. Keywords: Submerged Tunnel or Submerged Floating tunnel, Buoyancy, Minimum environmental disturbance Design.
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30

Zhang, Xianmeng, Minghao Wang, Dan Feng, and Jingchun Wang. "Water Inflow Amount Prediction for Karst Tunnel with Steady Seepage Conditions." Sustainability 15, no. 13 (2023): 10638. http://dx.doi.org/10.3390/su151310638.

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Tunnel engineering is an important aspect of developing and utilizing underground spaces. Tunnel water inrush became a common problem that restricts the safe and efficient construction of tunnels. This paper focuses on a karst water-rich tunnel in Chongqing and establishes a seepage field distribution model around the tunnel, analyzing the evolution law of the seepage field. The water balance method and underground runoff modulus method are used to predict tunnel water inflow. The prediction method for tunnel water inflow in water-rich karst areas is combined with long-term on-site tunnel hydr
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31

Xie, Yi, De Zhou, Hong Liao, and Jianqun Zhu. "Failure Mode of Tunnel Face Under Transient Unsaturated Seepage with Temperature Influence." Mathematics 13, no. 8 (2025): 1311. https://doi.org/10.3390/math13081311.

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The seepage caused by heavy rainfall and storm runoff is not a static phenomenon. On the contrary, it is a dynamic process known as unsaturated transient seepage. Under the condition, the spatiotemporal variations in suction stress cannot be overlooked. With the development of tunnel mechanics, there has been an emergence of tunnels affected by high ground temperatures or temperature influences, highlighting the necessity of incorporating temperature effects into the analysis. This article proposes a new framework for the spatiotemporal response of tunnel face safety to temperature-affected an
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32

Aygar, Ebu Bekir, and Candan Gokceoglu. "Problems Encountered during a Railway Tunnel Excavation in Squeezing and Swelling Materials and Possible Engineering Measures: A Case Study from Turkey." Sustainability 12, no. 3 (2020): 1166. http://dx.doi.org/10.3390/su12031166.

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The T3 railway tunnel—under construction within the scope of the Bursa-Yenişehir high-speed train project—is located in northwestern Turkey and has a length of 1250 m. The tunnel is being constructed entirely in silty clay/clayey silt, sand, and clay units, and it is designed in accordance with the principles of weak ground tunneling described by the new Austrian tunneling method (NATM). When the tunnel excavations began in 2013, during and after portal excavations, a failure occurred at the entrance of the tunnel; thus, a revision of the support systems became mandatory. While the excavation
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33

Zhang, Jianhong, Aixia Wang, Limin Zhang, and Xiangsheng Chen. "Coupling Failure Mechanism of Underground Structures Induced by Construction Disturbances." Mathematics 11, no. 3 (2023): 615. http://dx.doi.org/10.3390/math11030615.

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The development of cities often involves the construction of new tunnels buried underneath densely distributed existing structures. When tunnels experience complicated and difficult conditions, coupling failure mechanisms often develop, in which the failure of one structure results in the failures of adjacent structures caused by soil failure initiated from the excavation of the new tunnel. Four centrifuge tests were performed in this study to reveal three major mechanisms, i.e., rapid sand flow, partial failure and overall collapse induced by the instability of a tunnel face and the effects o
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34

Jia, Yanling, Aohui Ouyang, Siyu Wang, et al. "Development and Application of Model Test System for Reconstruction and Expansion of Existing Shallow Single-Hole Tunnel into Twin-Arch Tunnel." Advances in Civil Engineering 2021 (January 28, 2021): 1–17. http://dx.doi.org/10.1155/2021/6656165.

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In this study, we developed a tunnel excavation model test system to investigate the deformation and mechanical response of the surrounding rocks and tunnel structure during the reconstruction and expansion of an existing shallow single-hole tunnel into a twin-arch tunnel. A model test was conducted to study the variation in the ground surface settlement characteristics, surrounding rock pressure, and internal stresses of the supporting structure and midwall during the construction process. The influence of the excavation distance on displacements and structural stress between the faces of the
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35

Suo, Liang, Shugang Li, and Fengliang Wu. "Influence of Ventilation Parameters on Gas Transportation Patterns in Long Highway Tunnels and Sustainable Development of Ventilation Systems." Sustainability 17, no. 3 (2025): 1020. https://doi.org/10.3390/su17031020.

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In order to study the influence of ventilation parameters on gas movement in large sections of highway tunnels, a mathematical model of gas movement in tunnels is established based on the Yijin Expressway’s Kahaluo No. 1 three-lane tunnel project in Sichuan Province, by using Fluent numerical simulation software to simulate gas tunnel construction. The space–time distribution characteristics of the gas concentration in tunnel construction are obtained, and the influence of ventilation parameters on gas movement is analyzed, the ventilation parameters of the tunnel construction site were optimi
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36

Ali, Soomro Mukhtiar, Daddan Khan Bangwar, Soomro Mohsin Ali, and Keerio Manthar Ali. "3D Numerical Analysis of the Effects of an Advancing Tunnel on an Existing Loaded Pile Group." Engineering, Technology & Applied Science Research 8, no. 1 (2018): 2520–25. https://doi.org/10.5281/zenodo.1207347.

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Tunnels are often preferred for underground transportation in densely populated areas. In these areas, it is almost inevitable for tunnels to run close to some existing pile foundations. Since tunnelling activities induce stress relief and soil movement in the ground, existing piles may suffer from additional axial and lateral forces, bending moments, settlements and lateral deflections. Most of the previous researches on the responses of pile foundations due to tunnel construction were carried out under the plane strain condition. In this paper, a three-dimensional, elasto-plastic and coupled
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37

Song, Ao, Bin Song, and Rongyi Qian. "Experiment of 3D Seismic Reflection Technique for Forward Probing on TBM Tunnel Face." Journal of Environmental and Engineering Geophysics 24, no. 4 (2019): 609–19. http://dx.doi.org/10.2113/jeeg24.4.609.

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Geophysical technologies are used to mitigate geological hazard caused by adverse geological conditions in front of a tunnel face. The prevailing method for forward probing for tunnels constructed by a tunnel boring machine (TBM) for advance prediction is based on seismic detection. Conventional tunnel seismic prediction technology uses P- and S-waves with sources fired on the tunnel wall or face and layout receivers on the tunnel wall to acquire the reflected waves. However, the results show that most of these methods have different deficiencies that are in either low detection accuracy, shor
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38

Ma, Chundi, Kechao Li, Jilong Pan, Jiashuai Zheng, Qinli Zhang, and Chongchong Qi. "The Segmentation of Tunnel Faces in Underground Mines Based on the Optimized YOLOv5." Minerals 15, no. 3 (2025): 255. https://doi.org/10.3390/min15030255.

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Tunnel faces in underground mines, as the front line of mining, play an important role in both mine safety and mining intelligence. However, the engineering quality of tunnel faces is still evaluated based on visual observations by technicians, which cannot guarantee safety and real-time performance. Therefore, there is an urgent need for a more effective method to detect the quality of tunnel face engineering. In this study, a high-performance and accurate tunnel face segmentation model was developed by applying the YOLOv5-seg computer vision model to an underground mine. By optimizing a clas
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Deng, Huan, Shiqiang Chen, and Ying Rao. "Analysis of the Stability of the Double-Hole Complementary Ventilation and Ventilation Network of the Tunnel Constructed by Drilling and Blasting Method." Applied Sciences 14, no. 5 (2024): 2110. http://dx.doi.org/10.3390/app14052110.

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Currently, double-hole complementary ventilation is a mature ventilation method for operating tunnels, but how to carry out it in the construction tunnel poses a new challenge. Due to the desynchronization in the construction period of the double-hole tunnel, there is an instantaneous difference in the air flow demand between the two working faces. The study analyzes the impact of geometric parameters, specifically Lt (the distance from the traffic cross passage to the working face of the advance side tunnel), Lp (the distance between the pedestrian cross passage and the working face of the ad
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Li and Li. "Prediction of Tunnel Face Stability Using a Naive Bayes Classifier." Applied Sciences 9, no. 19 (2019): 4139. http://dx.doi.org/10.3390/app9194139.

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This paper develops a convenient approach for facilitating the prediction of tunnel face stability in the framework of Bayesian theorem. First, a number of values of the features influencing the face-stability of tunnels are chosen according to the full factorial design. Secondly, the software OptumG2 is utilized to performed strength reduction analyses to obtain safety factors regarding tunnel face stability. Based on the simulated safety factors, the chosen samples are labeled as stable (Fs≥1) or unstable samples (Fs<1). Thirdly, the model parameters that characterize the distribution of
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41

Zhen, Dayong, Kang Liu, Siwei Zhao, and Chao Zhou. "Application Comparison of Different Transient Electromagnetic Devices in Water Exploration of Tunnel Advanced Geological Prediction." Journal of Physics: Conference Series 2651, no. 1 (2023): 012099. http://dx.doi.org/10.1088/1742-6596/2651/1/012099.

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Abstract Detecting the possibility of water inrush in front of tunnel face is always the key of tunnel advanced geological prediction. Because of its sensitivity to groundwater, transient electromagnetic method is gradually being used in water exploration of tunnel advanced geological prediction. However, the current transient electromagnetic theory is established based on the half-space environment. In order to adapt to the detection work in the full-space environment such as tunnels, different transient electromagnetic devices have been improved. The effectiveness of these improved devices s
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Huang, Xin, Qi Liang, Zhengguo Zhu, Jiaqi Guo, and Yongchao Tian. "Identification and Treatment of Collapse and Mud Inrush Caused by Deep Karst Trough in Tunnels." Geofluids 2023 (February 7, 2023): 1–14. http://dx.doi.org/10.1155/2023/3007313.

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To predict and prevent the collapse and mud inrush caused by the deep karst trough in tunnels, an engineering case is studied. Firstly, a comprehensive identification method for the hazard-causing structure of the deep karst trough in tunnels is proposed and successfully applied. Secondly, the morphological characteristics and developmental mechanism of the deep karst trough are studied. The hazard-causing structure is mainly developed at the entrance section of the karst tunnel, which is funnel-shaped, mostly filled with clay and a small amount of gravel. The development scale is affected by
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43

Zhang, Yu. "Study on The Width of Coal Columns Retained in Deep Air Tunnels Dased on FLAC3D Simulation." Journal of Scientific and Engineering Research 12, no. 3 (2025): 90–95. https://doi.org/10.5281/zenodo.15180810.

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The rationality of the width of the coal columns in the tunnel along the air tunnel is related to the stability of the tunnel surrounding rock and the safe and efficient production of the working face. Through domestic and foreign research and analysis of the coal column reserve width, with the goal of improving coal mining rate and stabilization control of tunnel surrounding rocks, FLAC3D numerical simulation study was conducted in combination with the deep air tunnel along a mine in central China, and the surrounding rock stress evolution law was analyzed at different widths of narrow coal c
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44

Li, Z. Y., M. L. Zhou, and H. W. Huang. "Modeling the Seepage-induced Damage in Water-Rich Fault Zones at Tunnel Faces by Double Point Material Point Methods." IOP Conference Series: Earth and Environmental Science 1333, no. 1 (2024): 012005. http://dx.doi.org/10.1088/1755-1315/1333/1/012005.

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Abstract During tunnel construction, crossing water-rich fault fracture zones leads to water influx hazards at the tunnel face. Excavation exposes the fault, causing disturbances and changes in the hydraulic gradient. Thus, the tunnel face becomes a low hydraulic head surface. The naturally high permeability of the fracture zone provides a pathway for groundwater flow, resulting in water seepage along the fracture zone and subsequent water influx at the tunnel face. To investigate this interaction, a two-phase double-point material point method was employed aimed at developing a coupled fluid-
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45

Thai, Do Ngoc, and Do Duc Toan. "Study of the influence of face pressure on surface settlements by shield tunneling." Journal of Mining and Earth Sciences 61, no. 1 (2020): 31–40. http://dx.doi.org/10.46326/jmes.2020.61(1).04.

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In the mechanized excavation of subway tunnels, the shield tunnel boring machine (TBM) has been developed in recent decades for managing the instability of the excavation profile in complicated geotechnical conditions in urban areas. The paper presents a 3D simulation procedure for the detailed description of TBM (via the finite element code Abaqus) and quantifies the influence of TBM face pressure on ground surface settlements. The model is used to calculate ground surface settlements for different values of TBM face pressure. An additional aspect of the investigation is the determination of
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46

Deshpande, Shilpa, and Namdeo Hedaoo. "Evaluation of Face Stability for Mega Tunnel Under Varying Ground Strength Parameters." Civil and Environmental Engineering 20, no. 2 (2024): 720–29. https://doi.org/10.2478/cee-2024-0054.

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Abstract Transportation demands in developing countries necessitate the use of underground infrastructure, notably tunnels, which also serve as storage spaces for vehicles and military equipment, expanding their utility. Mega Tunnels, defined as those with a diameter exceeding 10m, offer diverse functionalities, including facilitating the storage and movement of large equipment and establishing comprehensive operational systems for urban areas. However, ensuring the stability of these tunnels’ faces poses a significant challenge due to their larger diameter, making it a crucial research focus.
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Chambon, Pierre, and Jean‐François Corté. "Shallow Tunnels in Cohesionless Soil: Stability of Tunnel Face." Journal of Geotechnical Engineering 120, no. 7 (1994): 1148–65. http://dx.doi.org/10.1061/(asce)0733-9410(1994)120:7(1148).

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48

Chi, Dechao, Yanbin Luo, Chengwei Chen, Shengqing Wang, Yunfei Wu, and Yuhang Hu. "Analysis of the Surrounding Rock Full-Displacement Variation in Large-Span Mudstone Highway Tunnels." Symmetry 16, no. 5 (2024): 526. http://dx.doi.org/10.3390/sym16050526.

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Due to the increasing development of highway reconstruction and expansion projects in China, many large-span highway tunnels are being constructed near existing highway tunnels. Tunneling underneath will inevitably cause variation in the surrounding rock displacement and may even lead to collapse. In this study, based on an analysis of extensive field monitoring data from the Gucheng tunnel, the variation law for the surrounding rock full-displacement and the influence of the tunnel-face spatial effect in a large-span mudstone tunnel are analyzed. The change in the full displacement experience
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49

Song, Hong Wei, and Hai Tao Wang. "Analytical Approach for Face Stability Estimate of Tunnel with Pipe Roof Reinforcement." Advanced Materials Research 243-249 (May 2011): 347–50. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.347.

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One of the most popular pre-reinforcement structures in the construction of tunnels through weak grounds would be the pipe roof reinforcement. This composite structure consists on installing, prior to the excavation of a length of tunnel, a series of pipes, either parallel to the tunnel axis or at a certain angle with it. By injecting grout through the pipes, the ground in between the pipes is stiffened and the pipes are connected, creating a kind of ‘umbrella’ above the area to be excavated. In this paper, by modifying the upper bound solution for tunnel face stability, the three-dimensional
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Singh Yadav, Jitendra, Akshay Kumar, Vaibhav Sharma, Karan Singh, and Parveen Sihag. "Stability Analysis of Different shapes of Tunnel in Cohensionless Soils." IOP Conference Series: Earth and Environmental Science 1110, no. 1 (2023): 012086. http://dx.doi.org/10.1088/1755-1315/1110/1/012086.

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Abstract One of the crucial factors that has gained widespread popularity during the tunnelling construction process is the face stability of tunnel that mainly depends upon the support pressure to be applied at the face of tunnel against the overburden pressure and surcharge loading acting on the earth surface. In this study, stability of different cross sections of tunnels has been investigated in cohesionless soil (loose and medium dense sand) using the Finite Element Analysis software Plaxis 2D V20. Tunnel having cross sectional dimension B as width, D as height positioned at a depth H fro
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