Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing Bridge
When urban subway tunnels cross existing bridge pile foundations, having a pile foundation underpinning that ensures the safe operation of existing bridges while enabling the safe construction of subway tunnels is the focus of attention. This paper takes the running tunnel project from Huaguoyuan We...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/24/12566 |
| _version_ | 1827642036487979008 |
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| author | Yuhang Zhou Yuanming Liu Qingzhi Chen Xun Ou Yingxiao Li |
| author_facet | Yuhang Zhou Yuanming Liu Qingzhi Chen Xun Ou Yingxiao Li |
| author_sort | Yuhang Zhou |
| collection | DOAJ |
| description | When urban subway tunnels cross existing bridge pile foundations, having a pile foundation underpinning that ensures the safe operation of existing bridges while enabling the safe construction of subway tunnels is the focus of attention. This paper takes the running tunnel project from Huaguoyuan West Station to Huaguoyuan East Station of Rail Transit Line 3 in Guiyang City, Guizhou Province as the background. The reasonableness and feasibility of the passive underpinning construction scheme for the Guihuang Viaduct was studied. The construction plan includes the following steps: underpinning pile construction, foundation pit excavation, the concreting of the underpinning bearing platform, and existing pile truncation. In order to ensure the structural safety of the existing viaduct during the construction of the pile foundation underpinning, a 3D numerical model of the construction of pile foundation underpinning and the whole process of tunnel construction was established. The settlement calculation results of the foundation pit and bridge pier were compared and analyzed with the field monitoring data to verify the accuracy of the numerical model. Further detailed analysis of the settlement of the bridge deck, the deformation of the existing piles, the axial forces of the existing piles, and the forces on the underpinning bearing platform was carried out. The results show that the bridge superstructure load can be transferred to the underpinning bearing platform smoothly after the existing pile truncation construction. The removal of obstacle piles during tunnel excavation has a very limited impact on the superstructure of the bridge, proving the reasonableness and feasibility of the construction plan. |
| first_indexed | 2024-03-09T17:22:59Z |
| format | Article |
| id | doaj.art-5b2e1f49a44a4f6cb6f119a49a0fef92 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T17:22:59Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-5b2e1f49a44a4f6cb6f119a49a0fef922023-11-24T13:00:50ZengMDPI AGApplied Sciences2076-34172022-12-0112241256610.3390/app122412566Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing BridgeYuhang Zhou0Yuanming Liu1Qingzhi Chen2Xun Ou3Yingxiao Li4College of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaWhen urban subway tunnels cross existing bridge pile foundations, having a pile foundation underpinning that ensures the safe operation of existing bridges while enabling the safe construction of subway tunnels is the focus of attention. This paper takes the running tunnel project from Huaguoyuan West Station to Huaguoyuan East Station of Rail Transit Line 3 in Guiyang City, Guizhou Province as the background. The reasonableness and feasibility of the passive underpinning construction scheme for the Guihuang Viaduct was studied. The construction plan includes the following steps: underpinning pile construction, foundation pit excavation, the concreting of the underpinning bearing platform, and existing pile truncation. In order to ensure the structural safety of the existing viaduct during the construction of the pile foundation underpinning, a 3D numerical model of the construction of pile foundation underpinning and the whole process of tunnel construction was established. The settlement calculation results of the foundation pit and bridge pier were compared and analyzed with the field monitoring data to verify the accuracy of the numerical model. Further detailed analysis of the settlement of the bridge deck, the deformation of the existing piles, the axial forces of the existing piles, and the forces on the underpinning bearing platform was carried out. The results show that the bridge superstructure load can be transferred to the underpinning bearing platform smoothly after the existing pile truncation construction. The removal of obstacle piles during tunnel excavation has a very limited impact on the superstructure of the bridge, proving the reasonableness and feasibility of the construction plan.https://www.mdpi.com/2076-3417/12/24/12566passive underpinninginterval tunnel crossing excavationnumerical simulationfield monitoring |
| spellingShingle | Yuhang Zhou Yuanming Liu Qingzhi Chen Xun Ou Yingxiao Li Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing Bridge Applied Sciences passive underpinning interval tunnel crossing excavation numerical simulation field monitoring |
| title | Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing Bridge |
| title_full | Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing Bridge |
| title_fullStr | Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing Bridge |
| title_full_unstemmed | Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing Bridge |
| title_short | Case Study of an Underpinning Pile Foundation for an Interval Tunnel Crossing an Existing Bridge |
| title_sort | case study of an underpinning pile foundation for an interval tunnel crossing an existing bridge |
| topic | passive underpinning interval tunnel crossing excavation numerical simulation field monitoring |
| url | https://www.mdpi.com/2076-3417/12/24/12566 |
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