Partitions of seismic affected zone and characteristics of segmental lining based on energy principle

Zhang, Xi; Shen, Yusheng; Zhou, Peng-fa; Qiu, Jutao

doi:10.1007/s11771-022-5008-7

Cited by 3 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the principle of avoiding active faults in tunnel engineering design, there are few engineering cases of tunnels crossing active fault zones. The characteristics of internal force distribution, deformation patterns, and failure modes within the rock mass of fault zones under fault displacement and seismic actions are closely related to the dynamic response of submarine tunnels to fault zones [5][6][7]. The seismic damage to fault-crossing tunnels is considered to have two main causes: one is the vibrational damage to the tunnel caused by earthquakes; the other is the shear damage to the tunnel caused by the fault.…”

Section: Introductionmentioning

confidence: 99%

“…The impact of active fault zones on submarine tunnels mainly has three aspects: one is earthquakes induced by sudden stick-slip deformation, the second is the effect of long-term creep deformation on the structure, and the third is the impact of distant earthquakes on active fault zones [6,7,11,12]. Among these, the creep deformation of the fault zone under tectonic stress is long-term, and it is necessary to design corresponding tunnel structures to prevent its harm to the tunnel structure in advance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Stability Analysis of Subsea Tunnel Crossing Active Fault Zone: A Case Study

Li,

Liu,

Liu

et al. 2024

JMSE

View full text Add to dashboard Cite

The rock strength in an active fault zone is low and the surrounding rock is fractured and has poor stability, making any subsea tunnel crossing the active fault zone extremely susceptible to disasters such as tunnel collapse, sudden water ingress, and mud inrush. This poses a potential threat to the construction project, making the dynamic stability analysis of a subsea tunnel crossing an active fault zone of great significance. This study takes the second subsea tunnel crossing the Cangkou Fault in Jiaozhou Bay as the engineering background and conducts numerical simulations by employing different lining stiffnesses for tunnel excavation, as well as applying dynamic loads. The dynamic stability of the subsea tunnel crossing the active fault zone is evaluated by comparing and analyzing the lining’s displacement, peak acceleration, and stress characteristics. This study explores the disaster-causing mechanisms of active fractures, determining that the hazard of orthogonal misalignment in an active fault zone is the least severe, while the hazard of opposite misalignment is the most severe. This research provides a basis for disaster prevention and mitigation in active fracture zones.

show abstract

Section: Introductionmentioning

confidence: 99%