Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning Construction
Technology of shield tunneling has been widely used in modern city subway system building, however, due to the limit of urban construction land resources, it is inevitable for the new building structures conflicted with existing one. Thus, it is essential to taking correct measures to guarantee the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/4/1611 |
| _version_ | 1797411844842848256 |
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| author | Chengran Zhang Yujia Zhao Zhen Zhang Bing Zhu |
| author_facet | Chengran Zhang Yujia Zhao Zhen Zhang Bing Zhu |
| author_sort | Chengran Zhang |
| collection | DOAJ |
| description | Technology of shield tunneling has been widely used in modern city subway system building, however, due to the limit of urban construction land resources, it is inevitable for the new building structures conflicted with existing one. Thus, it is essential to taking correct measures to guarantee the safety of existing structure. In this case, a typical case of metro shield tunnel crossing through city overpass bridge piles underpinning construction project is studied by the numerical method and site field monitoring. According to the existing overpass bridge structure, geological conditions and site operation environment, a suitable construction method of piles foundation underpinning plan for this project is adopted. In order to ensure the structure safety of the existed overpass bridge during the pile foundation underpinning construction, a numerical simulation model is established which takes the whole foundation underpinning structure and construction steps into consideration. The numerical simulation result shows that the stress and the settlement of the piles foundation underpinning structure is reasonable. After the comparing of the site monitoring data with the numerical model simulation results, it is found that the site settlement and stress results are highly consistent with the calculated results, and it proves the feasibility of the piles foundation underpinning construction scheme. Eventually, the site gauging settlement data of the overpass pier and the pile cap indicate that the original overpass structure is barely affected by the shield tunnel construction, the construction method can provide reference and experience for the future similar projects. |
| first_indexed | 2024-03-09T04:52:11Z |
| format | Article |
| id | doaj.art-9e397ac307ad46e697de51fcf0566d3c |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T04:52:11Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-9e397ac307ad46e697de51fcf0566d3c2023-12-03T13:09:48ZengMDPI AGApplied Sciences2076-34172021-02-01114161110.3390/app11041611Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning ConstructionChengran Zhang0Yujia Zhao1Zhen Zhang2Bing Zhu3College of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaCollege of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaCollege of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaCollege of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaTechnology of shield tunneling has been widely used in modern city subway system building, however, due to the limit of urban construction land resources, it is inevitable for the new building structures conflicted with existing one. Thus, it is essential to taking correct measures to guarantee the safety of existing structure. In this case, a typical case of metro shield tunnel crossing through city overpass bridge piles underpinning construction project is studied by the numerical method and site field monitoring. According to the existing overpass bridge structure, geological conditions and site operation environment, a suitable construction method of piles foundation underpinning plan for this project is adopted. In order to ensure the structure safety of the existed overpass bridge during the pile foundation underpinning construction, a numerical simulation model is established which takes the whole foundation underpinning structure and construction steps into consideration. The numerical simulation result shows that the stress and the settlement of the piles foundation underpinning structure is reasonable. After the comparing of the site monitoring data with the numerical model simulation results, it is found that the site settlement and stress results are highly consistent with the calculated results, and it proves the feasibility of the piles foundation underpinning construction scheme. Eventually, the site gauging settlement data of the overpass pier and the pile cap indicate that the original overpass structure is barely affected by the shield tunnel construction, the construction method can provide reference and experience for the future similar projects.https://www.mdpi.com/2076-3417/11/4/1611shield tunnelcity overpasspiles underpinningsite monitoringsettlement control |
| spellingShingle | Chengran Zhang Yujia Zhao Zhen Zhang Bing Zhu Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning Construction Applied Sciences shield tunnel city overpass piles underpinning site monitoring settlement control |
| title | Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning Construction |
| title_full | Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning Construction |
| title_fullStr | Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning Construction |
| title_full_unstemmed | Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning Construction |
| title_short | Case Study of Underground Shield Tunnels in Interchange Piles Foundation Underpinning Construction |
| title_sort | case study of underground shield tunnels in interchange piles foundation underpinning construction |
| topic | shield tunnel city overpass piles underpinning site monitoring settlement control |
| url | https://www.mdpi.com/2076-3417/11/4/1611 |
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