Research on the bearing capacity characteristics of initial support for horseshoe-shaped tunnel prefabrication

Abstract

•In view of the limited theoretical research on the load model of initial support for horseshoe-shaped prefabrication, taking the Luochuan Tunnel on the Xi’an-Yan’an newly built railway as the background, theoretical research was carried out and numerical analysis methods were used to study the load model, damage, plastic zone, deformation, and critical thickness of the initial support structure for horseshoe-shaped prefabrication. The results indicate that under the same boundary conditions, the ultimate bearing capacity of the prefabricated assembly initial support is higher than that of the shotcrete initial support, resulting in larger ultimate deformation capacity of the prefabricated assembly initial support.

Keywords

critical thickness / load model / numerical analysis / prefabricated assembly initial support / ultimate bearing capacity

References

[1] Adoko AC, Jiao YY, Wu L, Wang H, Wang ZH. Predicting tunnel convergence using multivariate adaptive regression spline and artificial neural network. Tunnel Undergr Space Technol. 2013;38:368-376.

[2] Chen X, He P, Yan D, Nie A. Face stability and reinforcement of the tunnel in weak surrounding rock. Geotech Geol Eng. 2020;38(5):5511-5521.

[3] Deng HS, Fu HL, Shi Y, Zhao YY, Hou WZ. Countermeasures against large deformation of deep-buried soft rock tunnels in areas with high geostress: a case study. Tunnel Undergr Space Technol. 2022;119:104238.

[4] Deng P, Liu Q, Liu B, Lu H. Failure mechanism and deformation prediction of soft rock tunnels based on a combined finite–discrete element numerical method. Comp Geotech. 2023;161:105622.

[5] Ding X, Weng Y, Zhang Y, et al. Stability of large parallel tunnels excavated in weak rocks: a case study. Rock Mech Rock Eng. 2017;50(9):2443-2464.

[6] Feng J, Tan Y, Yao S, Jiang H, Zhang J, Li H. Study on stress variation of advance fiberglass anchor bolts during tunnel excavation process. Sci Rep. 2023;13(1):4173.

[7] Guan K, Zhu W, Wei J, Liu X, Niu L, Wang X. A finite strain numerical procedure for a circular tunnel in strain-softening rock mass with large deformation. Int J Rock Mech Mining Sci. 2018;112:266-280.

[8] He M, Sui Q, Li M, Wang Z, Tao Z. Compensation excavation method control for large deformation disaster of mountain soft rock tunnel. Int J Mining Sci Technol. 2022;32(5):951-963.

[9] Hu Z, Shen J, Wang Y, Guo T, Liu Z, Gao X. Cracking characteristics and mechanism of entrance section in asymmetrically-load tunnel with bedded rock mass: a case study of a highway tunnel in southwest China. Eng Failure Anal. 2021;122:105221.

[10] Kim D. Large deformation finite element analyses in TBM tunnel excavation: CEL and auto-remeshing approach. Tunnel Undergr Space Technol. 2021;116:104081.

[11] Li LC, Liu HH. A numerical study of the mechanical response to excavation and ventilation around tunnels in clay rocks. Int J Rock Mech Mining Sci. 2013;59:22-32.

[12] Liu B, Song Y, Chu Z. Time-dependent safety of lining structures of circular tunnels in weak rock strata. Int J Mining Sci Technol. 2022;32(2):323-334.

[13] Mann PS, Singh S. Improved metaheuristic-based energy-efficient clustering protocol with optimal base station location in wireless sensor networks. Soft Comp. 2019;23(3):1021-1037.

[14] Sharifzadeh M, Tarifard A, Moridi MA. Time-dependent behavior of tunnel lining in weak rock mass based on displacement back analysis method. Tunnel Undergr Space Technol. 2013;38:348-356.

[15] Song C, He W, Fei M. Study on mechanical characteristics of support system for shallow-buried single-arch subway station in rock stratum. Tunnel Undergr Space Technol. 2022;124:104447.

[16] Su Y, Su Y, Zhao M, Vlachopoulos N. Tunnel stability analysis in weak rocks using the convergence confinement method. Rock Mech Rock Eng. 2020;54(2):559-582.

[17] Sun X, Jiang M, Miao C, Wang J, Zhang J. Study on large deformation and failure mechanism of deep buried stratified slate tunnel and control strategy of high constant resistance anchor cable. Eng Failure Anal. 2023;144:106953.

[18] Sun Z, Zhang D, Hou Y, Huangfu N, Li M, Guo F. Support countermeasures for large deformation in a deep tunnel in layered shale with high geostresses. Rock Mech Rock Eng. 2023;56(6):4463-4484.

[19] Sun Z, Zhang D, Fang Q, Wang J, Chu Z, Hou Y. Analysis of interaction between tunnel support system and surrounding rock for underwater mined tunnels considering the combined effect of blasting damage and seepage pressure. Tunnel Undergr Space Technol. 2023;141:105314.

[20] Tan Z, Li S, Yang Y, Wang J. Large deformation characteristics and controlling measures of steeply inclined and layered soft rock of tunnels in plate suture zones. Eng Failure Anal. 2022;131:105831.

[21] Wu H, Fan F, Yang X, Wang Z, Lai J, Xie Y. Large deformation characteristics and treatment effect for deep bias tunnel in broken phyllite: a case study. Eng Failure Anal. 2022;135:106045.

[22] Wu L, Wang H, Xie Y. In-plane stability of an underground support system with steel corrugated webs: experimental study, finite element analysis, and design formula. J Constr Steel Res. 2021;185:106872.

[23] Xia C, Liu Z, Zhou C, Zhang L. A meso/macroscale theoretical model for investigating the large deformation of soft rock tunnels considering creep and anisotropic effects. Rock Mech Rock Eng. 2023;56(7):4901-4922.

[24] Xiao MQ. Total Safety Factor Method for Tunnel Support Structure Design. People’s Communications Publishing House; 2020a:72-73.

[25] Xiao MQ. Design Method of Total Safety Factor for Tunnel Support Structures. People’s Transportation Publishing House; 2020b:60-62.

[26] Xu G, Gutierrez M, Arora K, Wang X. Visco-plastic response of deep tunnels based on a fractional damage creep constitutive model. Acta Geotech. 2021;17(2):613-633.

[27] Zhang Q, Ren M, Duan K, et al. Geo-mechanical model test on the collaborative bearing effect of rock-support system for deep tunnel in complicated rock strata. Tunnel Undergr Space Technol. 2019;91:103001.

[28] Zhao C, Lei M, Jia C, Zheng K, Song Y, Shi Y. Asymmetric large deformation of tunnel induced by groundwater in carbonaceous shale. Bull Eng Geol Environ. 2022;81(7):260.

[29] Zhao J, Tan Z, Wang W, Yu R, Wang J, Li Z. Study on the large deformation control technology of a single-hole double-track railway tunnel. Bull Eng Geol Environ. 2023;82(9):343.

[30] Zhou H, Qu C, Hu D, et al. In situ monitoring of tunnel deformation evolutions from auxiliary tunnel in deep mine. Eng Geol. 2017;221:10-15.

RIGHTS & PERMISSIONS

2024 The Authors. Deep Underground Science and Engineering published by John Wiley & Sons Australia, Ltd on behalf of China University of Mining and Technology.