Mechanical properties of segment joints in subway shield tunnels by a full-scale test

Abstract

In this article, the mechanical properties of tunnel joints with curved bolts are studied and analyzed using the research methods of full-scale testing and finite element numerical simulation. First, the experiment results were analyzed to find out the development law of stress and strain of concrete in each part of the tunnel fragment when bearing. The damage process of the joint of the tunnel fragment was described in stages, and the characteristic load value that can reflect the initial bearing capacity in each stage was proposed. Afterward, using the ABAQUS three-dimensional (3D) finite element numerical modeling software, a numerical model corresponding to the experiment was established. The mid-span deflection was used to observe the change in loading and the destruction of each stage, comparing it to the proposed form to verify the reasonableness of the numerical model. Finally, the numerical models were used to analyze the change in material parameters and external loads from two aspects. It is concluded that the damage process of tunnel joints under curved bolt connection can be divided into concrete elasticity stage, inner arc cracking stage, overall joint damage stage, and ultimate joint damage stage, and the initial load of the adjacent stages is defined as the characteristic load value. After concrete cracking occurs, the bolts start to become the main load-bearing components, and the bolt stress grows rapidly in stage II. The strain development of the concrete on the outer arc is greater than the strain value of the concrete on the side due to mutual contact and extrusion. The parameters were changed for material properties, and it was found that increasing the concrete strength and bolt strength could improve the shield fragment joint bearing performance. The optimal effect of improving the mechanical properties of the shield fragment joint would be obtained when the concrete strength grade is C60, and the bolt strength grade is 8.8. Increasing the size of the axial force and bolt preload has the most obvious effect on the load-carrying capacity in the initial elastic phase. This can reduce the joint angle and thus improve joint stiffness. Meanwhile, increasing the axial force has a greater effect on the performance of the tunnel joint than the bolt preload.

Graphical abstract

Keywords

shield tunnel / failure mechanism / bearing capacity / segment joint

References

[1] Lou P , Li Y , Lu S , Xiao H , Zhang Z . Deformation and mechanical characteristics of existing foundation pit and tunnel itself caused by shield tunnel undercrossing. Symmetry, 2022, 14(2): 263

[2] Li X , Li X K . A soil freezing–thawing model based on thermodynamics. Cold Regions Science and Technology, 2023, 211: 103867

[3] Li X , Li X , Liu J . A dynamic soil freezing characteristic curve model for frozen soil. Journal of Rock Mechanics and Geotechnical Engineering, 2024, 16(8): 3339–3352

[4] Fahiminia M , Shishegaran A . Evaluation of a developed bypass viscous damper performance. Frontiers of Structural and Civil Engineering, 2020, 14(3): 773–791

[5] Molins C , Arnau O . Experimental and analytical study of the structural response of segmental tunnel linings based on an in situ loading test. Part 1: Test configuration and execution. Tunnelling and Underground Space Technology, 2011, 26(6): 764–777

[6] Liu X , Dong Z , Bai Y , Zhu Y . Investigation of the structural effect induced by stagger joints in segmental tunnel linings: First results from full-scale ring tests. Tunnelling and Underground Space Technology, 2017, 66: 1–18

[7] Lee W F , Ishihara K . Forensic diagnosis of a shield tunnel failure. Engineering Structures, 2010, 32(7): 1830–1837

[8] Wang S C , Jiang X , Bai Y . The influence of hand hole on the ultimate strength and crack pattern of shield tunnel segment joints by scaled model test. Frontiers of Structural and Civil Engineering, 2019, 13(5): 1200–1213

[9] Zhang J , Zhao M . Design and Research of the Bending Test Set-up for the Longitudinal Joints in Segmental Tunnel Linings. IOP Conference Series: Materials Science and Engineering. IOP Publishing, 2019, 603(5): 052017

[10] Gong C J , Ding W , Soga K , Mosalam K M , Tuo Y . Sealant behavior of gasketed segmental joints in shield tunnels: An experimental and numerical study. Tunnelling and Underground Space Technology, 2018, 77: 127–141

[11] Zhang J W , Guo S C , Chen Y Y . Mechanical behavior of sealed waterproof for shield tunnel segment joint under different assembling ellipticity. Science Progress, 2021, 104(1): 54–68

[12] Wang J , Liu H Q , Liu H B . Measuring joint opening displacement between model shield-tunnel segments for reduced-scale model tests. Structures, 2018, 16: 112–118

[13] Tan X Y , Chen W , Wu G , Wang L , Yang J . A structural health monitoring system for data analysis of segment joint opening in an underwater shield tunnel. Structural Health Monitoring, 2020, 19(4): 1032–1050

[14] Ding W Q , Peng Y C , Yan Z G , Shen B W , Zhu H H , Wei X X . Full-scale testing and modeling of the mechanical behavior of shield TBM tunnel joints. Structural Engineering and Mechanics, 2013, 45(3): 337–354

[15] JusohS NMohamadHMartoAKassimF. Assessment on segment joint to improve soil-tunnel interaction. In: Proceedings of 12th International Civil Engineering Post Graduate Conference (SEPKA)/3rd International Symposium on Expertise of Engineering Design (ISEED). Paris: EDP Sciences, 2018

[16] LiuF JFangA L. Study on Test Scheme of Shield Tunnel Prestressed Segment Joint. In: Proceedings of 2nd International Conference on Civil Engineering, Architecture and Sustainable Infrastructure (ICCEASI 2013). Lausanne: Trans Tech Publications, 2013

[17] Shi C H , Cao C , Lei M , Yang W . Sealant performance test and stress-seepage coupling model for tunnel segment joints. Arabian Journal for Science and Engineering, 2019, 44(5): 4201–4212

[18] Zhang W J , Qi J , Zhang G , Niu R , Zhang C , He L , Lyu J . Full-scale experimental study on failure characteristics of the key segment in shield tunnel with super-large cross-section. Tunnelling and Underground Space Technology, 2022, 129: 104671

[19] Zuo L B , Li G , Feng K , Ma X , Zhang L , Qiu Y , Cao S , Feng L . Experimental analysis of mechanical behavior of segmental joint for gas pipeline shield tunnel under unfavorable compression-bending loads. Tunnelling and Underground Space Technology, 2018, 77: 227–236

[20] Wang F Y , Huang H , Zhang D , Zhou M . Cracking feature and mechanical behavior of shield tunnel lining simulated by a phase-field modeling method based on spectral decomposition. Tunnelling and Underground Space Technology, 2022, 119: 104246

[21] Liu X , Zhang Y M , Bao Y H . Full-scale experimental investigation on stagger effect of segmental tunnel linings. Tunnelling and Underground Space Technology, 2020, 102: 103423

[22] Wang Q , Geng P , Guo X , Zeng G , Chen C , He C . Experimental study on the tensile performance of circumferential joint in shield tunnel. Tunnelling and Underground Space Technology, 2021, 112: 103937

[23] Zhang Y J , Huang H , Zhang D , Ayyub B M . Deformation recoverability of longitudinal joints in segmental tunnel linings: An experimental study. Tunnelling and Underground Space Technology, 2022, 124: 104475

[24] Liu J W , Shi C , Lei M , Cao C , Lin Y . Improved analytical method for evaluating the responses of a shield tunnel to adjacent excavations and its application. Tunnelling and Underground Space Technology, 2020, 98: 103339

[25] Shi C H , Cao C , Lei M , Peng L , Ai H . Effects of lateral unloading on the mechanical and deformation performance of shield tunnel segment joints. Tunnelling and Underground Space Technology, 2016, 51: 175–188

[26] Chen R P , Meng F , Ye Y , Liu Y . Numerical simulation of the uplift behavior of shield tunnel during construction stage. Soil and Foundation, 2018, 58(2): 370–381

[27] Karami B , Shishegaran A , Taghavizade H , Rabczuk T . Presenting innovative ensemble model for prediction of the load carrying capacity of composite castellated steel beam under fire. Structures, 2021, 33: 4031–4052

[28] Shishegaran A , Karami B , Rabczuk T , Shishegaran A , Naghsh M A , Mohammad Khani M . Performance of fixed beam without interacting bars. Frontiers of Structural and Civil Engineering, 2020, 14(5): 1180–1195

[29] Shishegaran A , Khalili M R , Karami B , Rabczuk T , Shishegaran A . Computational predictions for estimating the maximum deflection of reinforced concrete panels subjected to the blast load. International Journal of Impact Engineering, 2020, 139: 103527

[30] Bigdeli A , Shishegaran A , Naghsh M A , Karami B , Shishegaran A , Alizadeh G . Surrogate models for the prediction of damage in reinforced concrete tunnels under internal water pressure. Journal of Zhejiang University. Science A, 2021, 22(8): 632–656

[31] Zhao T S , Liu W , Ye Z . Effects of water inrush from tunnel excavation face on the deformation and mechanical performance of shield tunnel segment joints. Advances in Civil Engineering, 2017, 2017: 5913640

[32] Tsiampousi A , Yu J , Standing J , Vollum R , Potts D . Behaviour of bolted cast iron joints. Tunnelling and Underground Space Technology, 2017, 68: 113–129

[33] Shishegaran A , Moradi M , Naghsh M A , Karami B , Shishegaran A . Prediction of the load-carrying capacity of reinforced concrete connections under post-earthquake fire. Journal of Zhejiang University. Science A, 2021, 22(6): 441–466

[34] Naghsh M A , Shishegaran A , Karami B , Rabczuk T , Shishegaran A , Taghavizadeh H , Moradi M . An innovative model for predicting the displacement and rotation of column-tree moment connection under fire. Frontiers of Structural and Civil Engineering, 2021, 15(1): 194–212

[35] Kou L , Xiong Z , Cui H , Zhao J . Study on mechanical characteristics of segmental joints of a large-diameter shield tunnel under ultrahigh water pressure. Sensors, 2021, 21(24): 8392

[36] Dong L W , Yang Z Y , Wang Z Y , Ding Y W , Qi W Q . Study on Internal Force of Tunnel Segment by Considering the Influence of Joints. Advances in Materials Science and Engineering, 2020, 2020: 1020732

[37] Li B Q , Zhang Z , Wang X , Liu X . Investigation on cohesive zone model of bolted joint for water conveyance tunnel lining. Engineering Computations, 2019, 36(5): 1449–1468

[38] Zheng G , Cui T , Cheng X , Diao Y , Zhang T , Sun J , Ge L . Study of the collapse mechanism of shield tunnels due to the failure of segments in sandy ground. Engineering Failure Analysis, 2017, 79: 464–490

[39] Liu J W , Shi C , Wang Z , Lei M , Zhao D , Cao C . Damage mechanism modelling of shield tunnel with longitudinal differential deformation based on elastoplastic damage model. Tunnelling and Underground Space Technology, 2021, 113: 103952

[40] Kakavand M R A , Taciroglu E . An enhanced damage plasticity model for predicting the cyclic behavior of plain concrete under multiaxial loading conditions. Frontiers of Structural and Civil Engineering, 2020, 14(6): 1531–1544

[41] Shishegaran A , Varaee H , Rabczuk T , Shishegaran G . High correlated variables creator machine: Prediction of the compressive strength of concrete. Computers & Structures, 2021, 247: 106479

[42] Wei G , Wang Q , Zhou X , Feng F , Wang X , Zhang L , Liang L . Experiments and numerical simulation of the reinforcement effect of channel-steel-reinforced shield tunnel segments under unloading conditions. European Journal of Environmental and Civil Engineering, 2023, 27(14): 4142–4164

[43] Wang J , Liu H B . Transverse seismic responses of a shield tunnel considering the influence of segment joints. Tunnelling and Underground Space Technology, 2023, 142: 105423

[44] Wu Z W , Zhang C , Mou L , Mei G , Garg A . Dynamic performance of submerged floating tunnel with different mooring styles subjected to anchor cable failure. Frontiers of Structural and Civil Engineering, 2023, 17(10): 1443–1464

[45] Li H Y , Li X G , Liu H . Deformation and failure mechanism of metro shield tunnel subjected to buried fault dislocation. Engineering Failure Analysis, 2023, 153: 107551

[46] Chung W C , Jin C , Kim M , Hwang J Y . Comparison study and forensic analysis between experiment and coupled dynamics simulation for submerged floating tunnel segment with free ends under wave excitations. Computer Modeling in Engineering & Sciences, 2023, 137(1): 155–174

Acknowledgements

The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China under (Grant Nos. 51978019 and 52278382) and the Natural Science Foundation of Beijing Municipality (No. 8222004).

Competing interests

The authors declare that they have no competing interests.

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2024 Higher Education Press