Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table test
The current aseismic design has seldom considered the effect caused by underlain tunnels. Previous studies focused on the scenarios of tunnels embedded in homogeneous soil under transverse seismic excitation. This paper aims to investigate the tunnel effect on the surface acceleration response in so...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-10-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967423000533 |
| _version_ | 1797690216054521856 |
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| author | Siming Li Roberto Cudmani Mingqing Xiao Zhiming Guo Yong Yuan |
| author_facet | Siming Li Roberto Cudmani Mingqing Xiao Zhiming Guo Yong Yuan |
| author_sort | Siming Li |
| collection | DOAJ |
| description | The current aseismic design has seldom considered the effect caused by underlain tunnels. Previous studies focused on the scenarios of tunnels embedded in homogeneous soil under transverse seismic excitation. This paper aims to investigate the tunnel effect on the surface acceleration response in soil-rock strata by shaking table tests. Three sets of excitations are employed and input along the shaking table in both transverse and longitudinal directions. The soil-rock site is classified as four micro-zones with varying conditions, to mount observation stations of acceleration sensors. Dynamic characteristics of the four zones are identified by the transfer function (TF) method, and the tunnel effect on the ground acceleration response is obtained by comparing the spectral acceleration results between the free-field and ground-tunnel models. The test results indicate that the tunnel effect varies with the site conditions. Distinctively, a significant amplification effect is observed at the A4 zone, located on the soil deposit near the soil-rock interface. Then, it is proved that the scattering waves generated at the interface and the standing waves trapped between the tunnel and upper ground surface account for the amplification, revealed by the discrepancies of the TF results and acceleration details between the free-field and ground-tunnel models. |
| first_indexed | 2024-03-12T01:56:20Z |
| format | Article |
| id | doaj.art-9554e3cdb02b4893a22fcf6a4df941f1 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T01:56:20Z |
| publishDate | 2023-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-9554e3cdb02b4893a22fcf6a4df941f12023-09-08T04:33:45ZengKeAi Communications Co., Ltd.Underground Space2467-96742023-10-0112202217Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table testSiming Li0Roberto Cudmani1Mingqing Xiao2Zhiming Guo3Yong Yuan4College of Civil Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Civil and Environmental Engineering, Technical University of Munich, München 81245, GermanyChina Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, ChinaPublic Works Construction Center, Nanjing 210019, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, China; State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; Corresponding author at: College of Civil Engineering, Tongji University, Shanghai 200092, China.The current aseismic design has seldom considered the effect caused by underlain tunnels. Previous studies focused on the scenarios of tunnels embedded in homogeneous soil under transverse seismic excitation. This paper aims to investigate the tunnel effect on the surface acceleration response in soil-rock strata by shaking table tests. Three sets of excitations are employed and input along the shaking table in both transverse and longitudinal directions. The soil-rock site is classified as four micro-zones with varying conditions, to mount observation stations of acceleration sensors. Dynamic characteristics of the four zones are identified by the transfer function (TF) method, and the tunnel effect on the ground acceleration response is obtained by comparing the spectral acceleration results between the free-field and ground-tunnel models. The test results indicate that the tunnel effect varies with the site conditions. Distinctively, a significant amplification effect is observed at the A4 zone, located on the soil deposit near the soil-rock interface. Then, it is proved that the scattering waves generated at the interface and the standing waves trapped between the tunnel and upper ground surface account for the amplification, revealed by the discrepancies of the TF results and acceleration details between the free-field and ground-tunnel models.http://www.sciencedirect.com/science/article/pii/S2467967423000533TunnelSoil-rock interfaceSeismic excitationGround responseSite characteristics |
| spellingShingle | Siming Li Roberto Cudmani Mingqing Xiao Zhiming Guo Yong Yuan Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table test Underground Space Tunnel Soil-rock interface Seismic excitation Ground response Site characteristics |
| title | Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table test |
| title_full | Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table test |
| title_fullStr | Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table test |
| title_full_unstemmed | Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table test |
| title_short | Ground motion amplification pattern with TBM tunnels crossing soil-rock interface: Shaking table test |
| title_sort | ground motion amplification pattern with tbm tunnels crossing soil rock interface shaking table test |
| topic | Tunnel Soil-rock interface Seismic excitation Ground response Site characteristics |
| url | http://www.sciencedirect.com/science/article/pii/S2467967423000533 |
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