Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure
Underground structures are susceptible to float and move upward during earthquakes when located in a liquefiable soil deposit. There are examples of this phenomenon in past major earthquake events. In this study, the uplift of circular tunnels in a liquefiable sand layer was investigated with a seri...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2023-06-01
|
| Series: | Underground Space |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967423000077 |
| _version_ | 1797702442537713664 |
|---|---|
| author | Saber Nokande Yaser Jafarian Abdolhosein Haddad |
| author_facet | Saber Nokande Yaser Jafarian Abdolhosein Haddad |
| author_sort | Saber Nokande |
| collection | DOAJ |
| description | Underground structures are susceptible to float and move upward during earthquakes when located in a liquefiable soil deposit. There are examples of this phenomenon in past major earthquake events. In this study, the uplift of circular tunnels in a liquefiable sand layer was investigated with a series of shaking table tests. The research has focused on the buried depth of the tunnel, tunnel diameter, tunnel weight, liquefaction extent, uplift mechanism, and factor of safety against liquefaction-induced uplift. According to the test results, the shallow buried depth, larger diameter, and lower weight can intensify the tunnel uplift, so the displacement in post-liquefaction time continues at the same rate as during the shaking time. Due to the shear-induced dilation, pore water pressure generation around the tunnel was reduced compared with that of the free field. The excess pore water pressure dissipation in the soil overlying the uplifted tunnel was significant, which leads to suction in the soil deposit. Furthermore, the acceleration response of overlying soil with the uplifted tunnel was similar to that of the free field. However, the soil acceleration response around the tunnel without uplift was similar to the base motion. |
| first_indexed | 2024-03-12T04:50:07Z |
| format | Article |
| id | doaj.art-9e6dbefef5e54f18bc0d40d957684b92 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T04:50:07Z |
| publishDate | 2023-06-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-9e6dbefef5e54f18bc0d40d957684b922023-09-03T09:25:58ZengKeAi Communications Co., Ltd.Underground Space2467-96742023-06-0110182198Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structureSaber Nokande0Yaser Jafarian1Abdolhosein Haddad2Department of Civil Engineering, Semnan University, Semnan 35131-19111, IranInternational Institute of Earthquake Engineering and Seismology (IIEES), Tehran 19537-14453, Iran; Deltares, Boussinesqweg 1, Delft, South Hollands 2629 HV, Netherlands; Corresponding author at: International Institute of Earthquake Engineering and Seismology (IIEES), Tehran 19537-14453, Iran.Department of Civil Engineering, Semnan University, Semnan 35131-19111, IranUnderground structures are susceptible to float and move upward during earthquakes when located in a liquefiable soil deposit. There are examples of this phenomenon in past major earthquake events. In this study, the uplift of circular tunnels in a liquefiable sand layer was investigated with a series of shaking table tests. The research has focused on the buried depth of the tunnel, tunnel diameter, tunnel weight, liquefaction extent, uplift mechanism, and factor of safety against liquefaction-induced uplift. According to the test results, the shallow buried depth, larger diameter, and lower weight can intensify the tunnel uplift, so the displacement in post-liquefaction time continues at the same rate as during the shaking time. Due to the shear-induced dilation, pore water pressure generation around the tunnel was reduced compared with that of the free field. The excess pore water pressure dissipation in the soil overlying the uplifted tunnel was significant, which leads to suction in the soil deposit. Furthermore, the acceleration response of overlying soil with the uplifted tunnel was similar to that of the free field. However, the soil acceleration response around the tunnel without uplift was similar to the base motion.http://www.sciencedirect.com/science/article/pii/S2467967423000077LiquefactionTunnel upliftUnderground structuresShaking table testCircular tunnel |
| spellingShingle | Saber Nokande Yaser Jafarian Abdolhosein Haddad Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure Underground Space Liquefaction Tunnel uplift Underground structures Shaking table test Circular tunnel |
| title | Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure |
| title_full | Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure |
| title_fullStr | Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure |
| title_full_unstemmed | Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure |
| title_short | Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure |
| title_sort | shaking table tests on the liquefaction induced uplift displacement of circular tunnel structure |
| topic | Liquefaction Tunnel uplift Underground structures Shaking table test Circular tunnel |
| url | http://www.sciencedirect.com/science/article/pii/S2467967423000077 |
| work_keys_str_mv | AT sabernokande shakingtabletestsontheliquefactioninducedupliftdisplacementofcirculartunnelstructure AT yaserjafarian shakingtabletestsontheliquefactioninducedupliftdisplacementofcirculartunnelstructure AT abdolhoseinhaddad shakingtabletestsontheliquefactioninducedupliftdisplacementofcirculartunnelstructure |