Abstract：
To provide reference of the seismic countermeasures for the secondary lining structure of highway tunnels in the earthquake area with nine-degree seismic intensity, based on Hilber-Hughes-Taylor′s time integration method and dynamic boundary condition of equivalent viscous-spring element, the following four aseismic measures were proposed from the aspect of designed force, by taking the highway tunnel passing through the area with nine-degree seismic intensity as the background, specifically the four measures include increase of reinforcement of secondary lining,increase of the thickness of secondary lining, optimization of horseshoe section to the round section and addition of rubber absorption layer between the primary support and secondary lining. Through aseismic calculation and analysis, the actual aseismic effect, the advantages and disadvantages of the four countermeasures were understood. To maximize the advantages of the aseismic measures, a combining countermeasure of increase of reinforcement and addition of shock absorption layer between primary support and secondary lining was put forward. Based on the research achievements, the corresponding aseismic measures were proposed in light of the force on secondary lining under the effect of seismic wave with different peak accelerations (0.1g-0.9g）in the area with nine-degree seismic intensity.
WANG Qiuyi1 YANG Kui2 MAO Jinlong2 YANG Qingyuan3 ZHAO Boming3
.Study on the Comprehensive Aseismic Measures for the Secondary Lining Structure of Highway Tunnels in Nine-degree Seismic Region[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(5): 42-49
2019, Vol. 56 