Analysis of the Mechanical Characteristics of Tunnels Under the Coupling Effect of Submarine Active Faults and Ground Vibrations
Keywords:Mechanical properties, tunnel mechanical response, earthquake load, submarine fault
With the rapid development of modern transportation construction, the construction of cross-harbor tunnels has solved the problem of traffic connection between cross-straits, bays and islands. The construction of sub-sea tunnels has technical difficulties such as high difficulty of marine geological survey, close hydraulic connection between strata and seawater, and more developed adverse geology. Based on this, this paper studies the mechanical characteristics of the submarine tunnel under seismic action at the active fault. Firstly, the mechanical model of the universal fault interface is established, and the calculation model of the fault interface is theoretically derived by the method of vibration mechanics, and the influence of the change of the strength of the contact surface and the stiffness of the surrounding rock on both sides of the fault on the transfer coefficient is obtained. Secondly, based on the ground motion input method of two-dimensional homogeneous half-space field, the relevant program of viscoelastic artificial boundary ground motion input is written by MATLAB program, which lays the foundation and premise of load input for mechanical response calculation. Finally, the outcomes of the tunnel parameters and the interplay between the tunnel and the surrounding rock on the cracking of the tunnel lining shape and the mechanical response of the cross-fault sub-sea tunnel underneath seismic motion are mentioned, and it is concluded that the increase in seismic intensity for different seismic intensities under the sea floor has an essentially constant proportion to the increase in acceleration of the seismic response; the seepage effect under the sea floor for the tunnel lining structure reduces the seismic response displacement, velocity and The seabed seepage for the tunnel lining structure reduces the peak seismic response displacement, velocity and acceleration by about 20–35%.
Geng Ping, He Yue, He Chuan, et al. Research on reasonable seismic fortification length of tunnel through fault fracture zone [J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(2): 358–365.
Yan Gaoming, Zhao Boming. Analytical solution of longitudinal seismic response law of tunnel crossing fault [J]. Engineering Science and Technology, 2023, 55(2).
Zhu J P. Study on Dynamic Response of Different Surrounding Rock Levels on Both Sides of Tunnel Fault Fracture Zone[J]. Int. J. Civ. Mach. Manuf, 2019, 4: 39–43.
Meyer K A, Ekh M, Ahlstrom J. Anisotropic yield surfaces after large shear deformations in pearlitic steel[J]. European Journal of Science Mechanics-A/Solids, 2020, 82: 103977.
Alibakhshi A, Heidari H. Nonlinear dynamics of dielectric elastomer balloons based on the Gent-Gent hyperelastic model[J]. European Journal of Mechanics-A/Solids, 2020, 82: 103986.
Eshaghi M. The effect of magnetorheological fluid and aerodynamic damping on the flutter boundaries of MR fluid sandwich plates in supersonic airflow[J]. European Journal of Mechanics-A/Solids, 2020, 82: 103997.
Guan Zhenchang, Gong Zhenfeng, Luo Zhibin, et al. Shaking table test study on seismic dynamic characteristics of large section tunnel [J]. Rock and Soil Mechanics, 2016, 37(9): 2553–2560.
Aygar E B, Gokceoglu C. A special support design for a large-span tunnel crossing an active fault (T9 Tunnel, Ankara–Sivas High-Speed Railway Project, Turkey) [J]. Environmental Earth Sciences, 2021, 80(1): 37.
Avanaki M J, Hoseini A, Vahdani S, et al. Seismic fragility curves for vulnerability assessment of steel fiber reinforced concrete segmental tunnel linings[J]. Tunnelling and Underground Space Technology, 2018, 78: 259–274.
Yan G, Shen Y, Gao B, et al. Damage evolution of tunnel lining with steel reinforced rubber joints under normal faulting: An experimental and numerical investigation[J]. Tunnelling and Underground Space Technology, 2020, 97: 103223.
Yang R, Deng Y. Analysis on security risks in tunnel construction based on the fault tree analysis[C]//IOP Conference Series: Earth and Environmental Science. IOP Publishing, 2021, 638(1): 012089.
Yifei Y, Bing S, Jianjun W, et al. A study on stress of buried oil and gas pipeline crossing a fault based on thin shell FEM model[J]. Tunnelling and Underground Space Technology, 2018, 81: 472–479.
Xin C L, Wang Z Z, Zhou J M, et al. Shaking table tests on seismic behavior of polypropylene fiber reinforced concrete tunnel lining[J]. Tunnelling and Underground Space Technology, 2019, 88: 1–15.
Yu H, Yuan Y, Bobet A. Seismic analysis of long tunnels: A review of simplified and unified methods[J]. Underground Space, 2017, 2(2): 73–87.
Chen Guo-Xing, Yue Wen-Ze, Ruan Bin, et al. Two-dimensional nonlinear analysis of seismic response characteristics of seabed in Jintang Strait [J]. Chinese Journal of Geotechnical Engineering, 2021, 43(11): 1967–1975.
Zhao Ying, Lin Xiaodong. Review on seismic research of tunnels in active fault area [J]. Shanxi Architecture, 2015, 41(19): 137–139.
Guo Changbao, Wu Ruian, Jiang Liangwen, et al. Typical geological disasters and engineering geological problems in Ya ’an – Nyingchi section of Sichuan-Tibet Railway [J]. Geoscience, 2021, 35(01): 1.
Al-Ajmi A M, Zimmerman R W. Relation between the Mogi and the Coulomb failure criteria[J]. International Journal of Rock Mechanics and Mining Sciences, 2005, 42(3): 431–439.
Zhang Qi. Modification of generalized three-dimensional Hoek-Brown rock mass strength criterion and multi-scale study of its parameters [J]. Chinese Journal of Rock Mechanics and Engineering, 2015 (3): 647–647.
Yashiro K, Kojima Y, Shimizu M. Historical earthquake damage to tunnels in Japan and case studies of railway tunnels in the 2004 Niigataken-Chuetsu earthquake[J]. Quarterly Report of RTRI, 2007, 48(3): 136–141.
Shahidi A R, Vafaeian M. Analysis of longitudinal profile of the tunnels in the active faulted zone and designing the flexible lining (for Koohrang-III tunnel) [J]. Tunnelling and underground space technology, 2005, 20(3): 213–221.
Lin M L, Jeng F S, Wang H J, et al. Response of soil and a submerged tunnel during a thrust fault offset based on model experiment and numerical analysis[C]//ASME Pressure Vessels and Piping Conference. 2005, 41936: 313–316.
Shen Y S, Wang Z Z, Yu J, et al. Shaking table test on flexible joints of mountain tunnels passing through normal fault[J]. Tunnelling and Underground Space Technology, 2020, 98: 103299.
Jiao Pengfei, Lai Hongpeng. Theoretical analysis of influence of reverse fault dislocation with different dip angles on tunnel structure [J]. Journal of Civil Engineering, 2019, 52(2): 106–117.
Sedarat H, Kozak A, Hashash Y M A, et al. Contact interface in seismic analysis of circular tunnels[J]. Tunnelling and Underground Space Technology, 2009, 24(4): 482–490.
Yan Gaoming, Shen Yusheng, Gao Bo, et al. Model test study of sectional joint tunnel crossing viscoslip fault [J]. Rock and Soil Mechanics, 2019, 40(11): 4450–4458. (in Chinese)
Zhou Guangxin, Sheng Qian, Cui Zhen, et al. Model test of failure mechanism of hinged tunnel across active faults under the influence of strike-slip faults [J]. Rock and Soil Mechanics, 2022, 43(1): 37–50.
Zhao Ying, Guo Endong, Liu Zhi, et al. Damage analysis of urban subway tunnel under strike-slip fault dislocation [J]. Rock and Soil Mechanics, 2014, 2.
Fan Kaixiang, Shen Yusheng, Gao Bo, et al. Research on vibration table test of cushion-absorbing layer in tunnel through hard and soft surrounding rock [J]. Journal of Civil Engineering, 2019, 52(9): 109–120, 128.
Wang Zhen, Zhong Zilan, Zhao Mi, et al. Simulation of normal fault type and its influence on mountain tunnel [J]. Chinese Journal of Geotechnical Engineering, 2020, 42(10): 1876–1884.
Ding Zude, Liao Mingrong, Xiao Nanrun, et al. Study on anti-damping measures and adaptability of tunnels crossing active faults [J]. Journal of Natural Disasters, 2022, 31(5).
Zhao Kun, Chen Weizhong, ZHAO Wusheng, et al. Research on design parameters of tunnel lining Articulation under the action of reverse fault [J]. 2018.