Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels
This study presents the construction of a river channel and a bridge adjacent to existing metro tunnels in Changzhou. The influence of simultaneous construction on these existing tunnels was investigated via 3D numerical modelling to predict tunnel deformation before construction. Then, a targeted p...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-10-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967422000125 |
| _version_ | 1827879170519072768 |
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| author | Wenhui Yang Dingwen Zhang Anhui Wang |
| author_facet | Wenhui Yang Dingwen Zhang Anhui Wang |
| author_sort | Wenhui Yang |
| collection | DOAJ |
| description | This study presents the construction of a river channel and a bridge adjacent to existing metro tunnels in Changzhou. The influence of simultaneous construction on these existing tunnels was investigated via 3D numerical modelling to predict tunnel deformation before construction. Then, a targeted protection scheme was developed according to the obtained numerical results. The full construction period field monitoring scheme can monitor tunnel responses during construction. Subsequently, the safety of the tunnel structures was evaluated according to the monitoring results, and the evolution of tunnel deformations was analysed. The analytical results can help to clarify the influence characteristics of different construction stages, verify the effect of the proposed protection scheme, and determine the disturbance mechanism of short-distance pile construction. According to the results, the tunnel deformation mainly occurred during pile construction and river channel excavation, and the tunnel vertical displacement and convergence were mainly affected by the construction. The anti-floating scheme of the partition excavation and casting effectively controlled the tunnel heave with an alarm value of approximately 6 mm. The penetration of the short-distance casing resulted in a tunnel deformation. The main construction influence area of the casing pile was within 6D (D is the pile diameter). |
| first_indexed | 2024-03-12T18:02:57Z |
| format | Article |
| id | doaj.art-ed2014785de74aae8a48e9677ab507b8 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T18:02:57Z |
| publishDate | 2022-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-ed2014785de74aae8a48e9677ab507b82023-08-02T09:34:37ZengKeAi Communications Co., Ltd.Underground Space2467-96742022-10-0175812832Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnelsWenhui Yang0Dingwen Zhang1Anhui Wang2School of Transportation, Southeast University, 2 Southeast University Road, Nanjing, Jiangsu Province 210096, PR ChinaSchool of Transportation, Southeast University, 2 Southeast University Road, Nanjing, Jiangsu Province 210096, PR China; Corresponding author.China Construction Industrial & Energy Engineering Group Co., Ltd., No.6 Wenlan Road, Nanjing, Jiangsu Province 210046, PR ChinaThis study presents the construction of a river channel and a bridge adjacent to existing metro tunnels in Changzhou. The influence of simultaneous construction on these existing tunnels was investigated via 3D numerical modelling to predict tunnel deformation before construction. Then, a targeted protection scheme was developed according to the obtained numerical results. The full construction period field monitoring scheme can monitor tunnel responses during construction. Subsequently, the safety of the tunnel structures was evaluated according to the monitoring results, and the evolution of tunnel deformations was analysed. The analytical results can help to clarify the influence characteristics of different construction stages, verify the effect of the proposed protection scheme, and determine the disturbance mechanism of short-distance pile construction. According to the results, the tunnel deformation mainly occurred during pile construction and river channel excavation, and the tunnel vertical displacement and convergence were mainly affected by the construction. The anti-floating scheme of the partition excavation and casting effectively controlled the tunnel heave with an alarm value of approximately 6 mm. The penetration of the short-distance casing resulted in a tunnel deformation. The main construction influence area of the casing pile was within 6D (D is the pile diameter).http://www.sciencedirect.com/science/article/pii/S2467967422000125Existing tunnelField monitoringCasing pileTunnel deformationAdjacent construction |
| spellingShingle | Wenhui Yang Dingwen Zhang Anhui Wang Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels Underground Space Existing tunnel Field monitoring Casing pile Tunnel deformation Adjacent construction |
| title | Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels |
| title_full | Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels |
| title_fullStr | Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels |
| title_full_unstemmed | Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels |
| title_short | Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels |
| title_sort | field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels |
| topic | Existing tunnel Field monitoring Casing pile Tunnel deformation Adjacent construction |
| url | http://www.sciencedirect.com/science/article/pii/S2467967422000125 |
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