Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite Strata
Cross-river twin tunnels are prone to deformation and uneven settlement of the surrounding soil due to the complexity of the strata crossed, which has a negative impact on the tunnel structure. A numerical calculation model was established using the COMSOL Multiphysics to study the effects of twin t...
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MDPI AG
2022-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/11/5479 |
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| author | Huijuan Deng Ping Cao Yinzhu Liu Zhizhen Liu Gang Meng Zhi Fan Weiping Xie |
| author_facet | Huijuan Deng Ping Cao Yinzhu Liu Zhizhen Liu Gang Meng Zhi Fan Weiping Xie |
| author_sort | Huijuan Deng |
| collection | DOAJ |
| description | Cross-river twin tunnels are prone to deformation and uneven settlement of the surrounding soil due to the complexity of the strata crossed, which has a negative impact on the tunnel structure. A numerical calculation model was established using the COMSOL Multiphysics to study the effects of twin tunnel excavation in composite strata on the ground settlement and the ground settlement pattern. The results indicated that after the construction of the twin tunnels is completed, the ground settlement above the first tunnel is slightly larger than the ground settlement above the second tunnel. The further the spacing between the two tunnels before and after excavation, the smaller the amount of ground settlement and the impact on the surrounding soil. The ground settlement value increases with the increase in burial depth, and the ground settlement curve gradually changes from a W-shaped curve to a V-shaped curve. As the distance between the two tunnels increases, the maximum settlement value of the settlement curve gradually decreases, and the ground lateral settlement curve changes from V-shaped to W-shaped. The higher the water level on the riverbed side, the greater the settlement value of the ground. |
| first_indexed | 2024-03-10T01:31:03Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T01:31:03Z |
| publishDate | 2022-05-01 |
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| series | Applied Sciences |
| spelling | doaj.art-d621a2b07b374f11ab6a4f58cf00b7f62023-11-23T13:42:23ZengMDPI AGApplied Sciences2076-34172022-05-011211547910.3390/app12115479Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite StrataHuijuan Deng0Ping Cao1Yinzhu Liu2Zhizhen Liu3Gang Meng4Zhi Fan5Weiping Xie6School of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSinohydro Engineering Bereau 8 Co., Ltd., Changsha 410004, ChinaSinohydro Engineering Bereau 8 Co., Ltd., Changsha 410004, ChinaSinohydro Engineering Bereau 8 Co., Ltd., Changsha 410004, ChinaCross-river twin tunnels are prone to deformation and uneven settlement of the surrounding soil due to the complexity of the strata crossed, which has a negative impact on the tunnel structure. A numerical calculation model was established using the COMSOL Multiphysics to study the effects of twin tunnel excavation in composite strata on the ground settlement and the ground settlement pattern. The results indicated that after the construction of the twin tunnels is completed, the ground settlement above the first tunnel is slightly larger than the ground settlement above the second tunnel. The further the spacing between the two tunnels before and after excavation, the smaller the amount of ground settlement and the impact on the surrounding soil. The ground settlement value increases with the increase in burial depth, and the ground settlement curve gradually changes from a W-shaped curve to a V-shaped curve. As the distance between the two tunnels increases, the maximum settlement value of the settlement curve gradually decreases, and the ground lateral settlement curve changes from V-shaped to W-shaped. The higher the water level on the riverbed side, the greater the settlement value of the ground.https://www.mdpi.com/2076-3417/12/11/5479cross-river tunnel excavationcomposite strataground settlementnumerical modeling |
| spellingShingle | Huijuan Deng Ping Cao Yinzhu Liu Zhizhen Liu Gang Meng Zhi Fan Weiping Xie Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite Strata Applied Sciences cross-river tunnel excavation composite strata ground settlement numerical modeling |
| title | Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite Strata |
| title_full | Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite Strata |
| title_fullStr | Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite Strata |
| title_full_unstemmed | Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite Strata |
| title_short | Numerical Analysis of Ground Settlement Patterns Resulting from Tunnel Excavation in Composite Strata |
| title_sort | numerical analysis of ground settlement patterns resulting from tunnel excavation in composite strata |
| topic | cross-river tunnel excavation composite strata ground settlement numerical modeling |
| url | https://www.mdpi.com/2076-3417/12/11/5479 |
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