Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnels
Metro tunnels are often constructed between dense building foundations and underground pipelines, thus the spacing between adjacent tunnels is usually small. A decrease in the spacing can significantly increase the severity of tilting of adjacent piles or ground settlement on either side of the metr...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-09-01
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| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016823007032 |
| _version_ | 1797686896606838784 |
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| author | Bin Yan Rui Wang You Wang |
| author_facet | Bin Yan Rui Wang You Wang |
| author_sort | Bin Yan |
| collection | DOAJ |
| description | Metro tunnels are often constructed between dense building foundations and underground pipelines, thus the spacing between adjacent tunnels is usually small. A decrease in the spacing can significantly increase the severity of tilting of adjacent piles or ground settlement on either side of the metro. In order to analyse the settlement response of the ground surface and adjacent buildings, as well as the movement of the building piles, field monitoring and numerical simulations were carried out for a section of three small-spacing tunnels. A three-stage analysis method was proposed for the calculation of the ground settlement curve induced by the excavation of the three-line tunnels. The results show that the construction of the three-line small-spacing tunnels caused significant tilting of neighboring piles. Furthermore, the excavation of a new tunnel near the completed tunnel extended the area of settlement, thus increasing the possibility of tunnel construction affecting the adjacent buildings and piles. The maximum axial stress increased as the excavation face approached the pile when the distance reached 4D (D is the diameter of the tunnel), then it stabilized when the excavation face passed a distance of 2.5D. As the excavation face approached the pile, the settlement of the pile top gradually increased and stabilized after passing a distance of 8D. The horizontal displacement of the pile bottom reached stability when the excavation face passed a distance of 2D. |
| first_indexed | 2024-03-12T01:11:12Z |
| format | Article |
| id | doaj.art-deedf3fdc6f644adaac5d13cb34d4416 |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-03-12T01:11:12Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-deedf3fdc6f644adaac5d13cb34d44162023-09-14T04:53:13ZengElsevierAlexandria Engineering Journal1110-01682023-09-0179237251Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnelsBin Yan0Rui Wang1You Wang2School of Civil Engineering, Central South University, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, Changsha 410075, ChinaCorresponding author.; School of Civil Engineering, Central South University, Changsha 410075, ChinaMetro tunnels are often constructed between dense building foundations and underground pipelines, thus the spacing between adjacent tunnels is usually small. A decrease in the spacing can significantly increase the severity of tilting of adjacent piles or ground settlement on either side of the metro. In order to analyse the settlement response of the ground surface and adjacent buildings, as well as the movement of the building piles, field monitoring and numerical simulations were carried out for a section of three small-spacing tunnels. A three-stage analysis method was proposed for the calculation of the ground settlement curve induced by the excavation of the three-line tunnels. The results show that the construction of the three-line small-spacing tunnels caused significant tilting of neighboring piles. Furthermore, the excavation of a new tunnel near the completed tunnel extended the area of settlement, thus increasing the possibility of tunnel construction affecting the adjacent buildings and piles. The maximum axial stress increased as the excavation face approached the pile when the distance reached 4D (D is the diameter of the tunnel), then it stabilized when the excavation face passed a distance of 2.5D. As the excavation face approached the pile, the settlement of the pile top gradually increased and stabilized after passing a distance of 8D. The horizontal displacement of the pile bottom reached stability when the excavation face passed a distance of 2D.http://www.sciencedirect.com/science/article/pii/S1110016823007032Small spacing tunnelsShield constructionGround settlementDeformation of pileNumerical simulation |
| spellingShingle | Bin Yan Rui Wang You Wang Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnels Alexandria Engineering Journal Small spacing tunnels Shield construction Ground settlement Deformation of pile Numerical simulation |
| title | Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnels |
| title_full | Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnels |
| title_fullStr | Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnels |
| title_full_unstemmed | Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnels |
| title_short | Deformation of adjacent buildings and ground settlement induced by shield construction of three-line small-spacing tunnels |
| title_sort | deformation of adjacent buildings and ground settlement induced by shield construction of three line small spacing tunnels |
| topic | Small spacing tunnels Shield construction Ground settlement Deformation of pile Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S1110016823007032 |
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