Analytical algorithms of compressive bending capacity of bolted circumferential joint in metro shield tunnels

Abstract

The integrity and bearing capacity of segment joints in shield tunnels are associated closely with the mechanical properties of the joints. This study focuses on the mechanical characteristics and mechanism of a bolted circumferential joint during the entire bearing process. Simplified analytical algorithms for four stress stages are established to describe the bearing behaviors of the joint under a compressive bending load. A height adjustment coefficient, α, for the outer concrete compression zone is introduced into a simplified analytical model. Factors affecting α are determined, and the degree of influence of these factors is investigated via orthogonal numerical simulations. The numerical results show that α can be specified as approximately 0.2 for most metro shield tunnels in China. Subsequently, a case study is performed to verify the rationality of the simplified theoretical analysis for the segment joint via numerical simulations and experiments. Using the proposed simplified analytical algorithms, a parametric investigation is conducted to discuss the factors affecting the ultimate compressive bending capacity of the joint. The method for optimizing the joint flexural stiffness is clarified. The results of this study can provide a theoretical basis for optimizing the design and prediciting the damage of bolted segment joints in shield tunnels.

Graphical abstract

Keywords

shield tunnel / segment joint / joint structural model / failure mechanism

References

[1] Wu H, Xu Y, Shen S L, Chai J C. Long-term settlement behavior of ground around shield tunnel due to leakage of water in soft deposit of Shanghai. Frontiers of Architecture and Civil Engineering in China, 2011, 5(2): 194–198

[2] Xue Y, Gong H, Kong F, Yang W, Qiu D, Zhou B. Stability analysis and optimization of excavation method of double-arch tunnel with an extra-large span based on numerical investigation. Frontiers of Structural and Civil Engineering, 2021, 15(1): 136–146

[3] Lei H, Zhang Y, Hu Y, Liu Y. Model test and discrete element method simulation of shield tunneling face stability in transparent clay. Frontiers of Structural and Civil Engineering, 2021, 15(1): 147–166

[4] Li P F, Wei Y J, Zhang M J, Huang Q, Wang F. Influence of non-associated flow rule on passive face instability for shallow shield tunnels. Tunnelling and Underground Space Technology, 2022, 119: 104202

[5] Li P F, Zou H H, Wang F, Xiong H C. An analytical mechanism of limit support pressure on cutting face for deep tunnels in the sand. Computers and Geotechnics, 2020, 119: 103372

[6] Li S H, Zhang M J, Li P F. Analytical solutions to ground settlement induced by ground loss and construction loadings during curved shield tunneling. Journal of Zhejiang University, Science A, 2021, 22(4): 296–313

[7] Pan Q, Dias D. Safety factor assessment of a tunnel face reinforced by horizontal dowels. Engineering Structures, 2017, 142: 56–66

[8] Zhang M J, Di Q G, Li P F, Wei Y J, Wang F. Influence of non-associated flow rule on face stability for tunnels in cohesive–frictional soils. Tunnelling and Underground Space Technology, 2022, 121: 104320

[9] Zhang M J, Li S H, Li P F. Numerical analysis of ground displacement and segmental stress and influence of yaw excavation loadings for a curved shield tunnel. Computers and Geotechnics, 2020, 118: 103325

[10] Zheng H B, Li P F, Ma G M, Zhang Q B. Experimental investigation of mechanical characteristics for linings of twins tunnels with asymmetric cross-section. Tunnelling and Underground Space Technology, 2022, 119: 104209

[11] Huang K P, Wang T T, Huang T H, Jeng F S. Profile deformation of a circular tunnel induced by ambient stress changes. Tunnelling and Underground Space Technology, 2010, 25(3): 266–278

[12] Meda A, Rinaldi Z, Caratelli A, Cignitti F. Experimental investigation on precast tunnel segments under TBM thrust action. Engineering Structures, 2016, 119: 174–185

[13] Nehdi M L, Abbas S, Soliman A M. Exploratory study of ultra-high performance fiber reinforced concrete tunnel lining segments with varying steel fiber lengths and dosages. Engineering Structures, 2015, 101: 733–742

[14] Ye Z, Liu H B. Investigating the relationship between erosion-induced structural damage and lining displacement parameters in shield tunnelling. Computers and Geotechnics, 2021, 133: 104041

[15] Yuan Y, Bai Y, Liu J H. Assessment service state of tunnel structure. Tunnelling and Underground Space Technology, 2012, 27(1): 72–85

[16] Liu D J, Tian C, Wang F, Hu Q F, Zuo J P. Longitudinal structural deformation mechanism of shield tunnel linings considering shearing dislocation of circumferential joints. Computers and Geotechnics, 2021, 139: 104384

[17] Wu H N, Shen S L, Chen R P, Zhou A N. Three-dimensional numerical modelling on localised leakage in segmental lining of shield tunnels. Computers and Geotechnics, 2020, 122: 103549

[18] Ye F, Gou C F, Sun H D, Liu Y P, Xia Y X, Zhou Z. Model test study on effective ratio of segment transverse bending rigidity of shield tunnel. Tunnelling and Underground Space Technology, 2014, 41: 193–205

[19] ZhongXZhu WHuangZHanY. Effect of joint structure on joint stiffness for shield tunnel lining. Tunnelling and Underground Space Technology, 2006, 21(3–4): 407–408

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

[21] Wang S, 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

[22] 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

[23] Li X J, Yan Z G, Wang Z, Zhu H H. A progressive model to simulate the full mechanical behavior of concrete segmental lining longitudinal joints. Engineering Structures, 2015, 93: 97–113

[24] Li X J, Yan Z G, Wang Z, Zhu H H. Experimental and analytical study on longitudinal joint opening of concrete segmental lining. Tunnelling and Underground Space Technology, 2015, 46: 52–63

[25] Jin Y L, Ding W, Yan Z, Soga K, Li Z. Experimental investigation of the nonlinear behavior of segmental joints in a water-conveyance tunnel. Tunnelling and Underground Space Technology, 2017, 68: 153–166

[26] Gong C, Ding W, Mosalam K M, Günay S, Soga K. Comparison of the structural behavior of reinforced concrete and steel fiber reinforced concrete tunnel segmental joints. Tunnelling and Underground Space Technology, 2017, 68: 38–57

[27] Caratelli A, Meda A, Rinaldi Z, Giuliani-Leonardi S, Renault F. On the behavior of radial joints in segmental tunnel linings. Tunnelling and Underground Space Technology, 2018, 71: 180–192

[28] Feng K, He C, Qiu Y, Zhang L, Wang W, Xie H M, Zhang Y Y, Cao S Y. Full-scale tests on bending behavior of segmental joints for large underwater shield tunnels. Tunnelling and Underground Space Technology, 2018, 75: 100–116

[29] Liu X, Bai Y, Yuan Y, Mang H A. Experimental investigation of the ultimate bearing capacity of continuously jointed segmental tunnel linings. Structure and Infrastructure Engineering, 2016, 12(10): 1364–1379

[30] Liu X, Zhang C, Zhang C G, Yuan Y. Ultimate load-carrying capacity of the longitudinal joints in segmental tunnel linings. Structural Concrete, 2017, 18(5): 693–709

[31] 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

[32] IftimieT. Prefabricated lining, conceptional analysis and comparative studies for optimal solution. In: ITA International Congress Tunnelling and Ground Conditions. Cairo: AA Balkema, 1994, 339–346

[33] Huang Z, Zhang C L, Ma S K, Zhang J B, Zhu Q X. Study of the mechanical behaviour and damage characteristics of three new types of joints for fabricated rectangular tunnels using a numerical approach. Tunnelling and Underground Space Technology, 2021, 118: 104184

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