SEISMIC DYNAMIC RESPONSE ANALYSIS OF TWIN TUNNELS WITH DIFFERENT LINING STIFFNESS IN MOUNTAINS

HUANG Min; DUAN Jingmin; MAO Qingchao; WANG Jiakai

doi:10.13204/j.gyjzG21040603

Volume 51 Issue 7

Nov. 2021

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HUANG Min, DUAN Jingmin, MAO Qingchao, WANG Jiakai. SEISMIC DYNAMIC RESPONSE ANALYSIS OF TWIN TUNNELS WITH DIFFERENT LINING STIFFNESS IN MOUNTAINS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 39-46,63. doi: 10.13204/j.gyjzG21040603

Citation:

HUANG Min, DUAN Jingmin, MAO Qingchao, WANG Jiakai. SEISMIC DYNAMIC RESPONSE ANALYSIS OF TWIN TUNNELS WITH DIFFERENT LINING STIFFNESS IN MOUNTAINS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 39-46,63. doi: 10.13204/j.gyjzG21040603

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SEISMIC DYNAMIC RESPONSE ANALYSIS OF TWIN TUNNELS WITH DIFFERENT LINING STIFFNESS IN MOUNTAINS

doi: 10.13204/j.gyjzG21040603

School of Civil Engineering, Henan University of Engineering, Zhengzhou 451191, China

Received Date: 2021-04-06
Available Online: 2021-11-11

Abstract

Abstract

To study seismic responses of twin tunnels with different lining stiffness, the seismic responses of twin tunnels with different lining stiffness was calculated and analyzed by the wave theory and combined with numerical calculation methods, taking the Leboguolaji tunnel of the Yalu Expressway as the background. The wave scattering theory was used to analyze the series solutions of dynamic stress coefficients for circular linings under the action of plane P-wave. The wave analysis results showed that the dynamic stress coefficient of circular linings for twin tunnels had important relation with the distance between twin tunnels, lining stiffness and P-wave frequency. The smaller the distance between the twin tunnels and the larger the lining stiffness, the larger the dynamic stress coefficient of the twin tunnels linings.The higher the plane P-wave frequency, the smaller the dynamic stress coefficient of the twin tunnel linings. Based on FLAC^3D analysis software, the analysis model of numerical seismic responses for twin tunnels in mountains was constructed. The calculation results showed that the seismic responses of the tunnel structure with the rigid lining was significantly higher than that of the flexible lining, which indicated that the flexible lining could weaken the seismic dynamic responses of tunnels and had a certain shock absorption effect, but the seismic displacement of the flexible lining was higher than that of the rigid lining. The numerical results were in good agreements with the wave theory.
- lining stiffness,
- twin tunnels,
- seismic response

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References(25)

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