Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical Modeling
Constructing subways in soft soil strata by shields may cause large displacement of ground and tunnels during and after construction. To evaluate the corresponding short-term and long-term displacement, this paper presented a three-dimensional numerical model based on the project of Suzhou rail tran...
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MDPI AG
2022-03-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/7/3564 |
| _version_ | 1797440322565832704 |
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| author | Hui Jin Dajun Yuan Shunxin Zhou Di Zhao |
| author_facet | Hui Jin Dajun Yuan Shunxin Zhou Di Zhao |
| author_sort | Hui Jin |
| collection | DOAJ |
| description | Constructing subways in soft soil strata by shields may cause large displacement of ground and tunnels during and after construction. To evaluate the corresponding short-term and long-term displacement, this paper presented a three-dimensional numerical model based on the project of Suzhou rail transit line S1. This model adopted the modified Cam-clay model to simulate the behavior of soft soil and can consider the grouting parameters and the water leakage of the assembled segment lining. In addition, an on-site monitoring project was implemented, and the field observations were compared with the simulation results. Finally, the sensitivity of key parameters was carried out by the established numerical model. The results indicated that the grouting volume, the thicknesses of soft soil under the tunnel, and the tunnel leakage conditions have a significant impact on the ground and tunnel settlement. Notably, serious tunnel leakage will cause large long-term consolidation settlement, and the increasing thicknesses of soft soil under the tunnel does not increase the long-term settlement of the stratum and the tunnel when the tunnel meets the secondary waterproof requirements, but does increase the corresponding short-term settlement. |
| first_indexed | 2024-03-09T12:06:30Z |
| format | Article |
| id | doaj.art-388a91643e61483b8bbb03a6aa7f44fb |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T12:06:30Z |
| publishDate | 2022-03-01 |
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| series | Applied Sciences |
| spelling | doaj.art-388a91643e61483b8bbb03a6aa7f44fb2023-11-30T22:57:29ZengMDPI AGApplied Sciences2076-34172022-03-01127356410.3390/app12073564Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical ModelingHui Jin0Dajun Yuan1Shunxin Zhou2Di Zhao3Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaSuzhou Rail Transit Shiyu Line 1 Co., Ltd., Kunshan 215007, ChinaKey Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaConstructing subways in soft soil strata by shields may cause large displacement of ground and tunnels during and after construction. To evaluate the corresponding short-term and long-term displacement, this paper presented a three-dimensional numerical model based on the project of Suzhou rail transit line S1. This model adopted the modified Cam-clay model to simulate the behavior of soft soil and can consider the grouting parameters and the water leakage of the assembled segment lining. In addition, an on-site monitoring project was implemented, and the field observations were compared with the simulation results. Finally, the sensitivity of key parameters was carried out by the established numerical model. The results indicated that the grouting volume, the thicknesses of soft soil under the tunnel, and the tunnel leakage conditions have a significant impact on the ground and tunnel settlement. Notably, serious tunnel leakage will cause large long-term consolidation settlement, and the increasing thicknesses of soft soil under the tunnel does not increase the long-term settlement of the stratum and the tunnel when the tunnel meets the secondary waterproof requirements, but does increase the corresponding short-term settlement.https://www.mdpi.com/2076-3417/12/7/3564soft soilshield constructionnumerical modelfield observation surface displacementtunnel displacement |
| spellingShingle | Hui Jin Dajun Yuan Shunxin Zhou Di Zhao Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical Modeling Applied Sciences soft soil shield construction numerical model field observation surface displacement tunnel displacement |
| title | Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical Modeling |
| title_full | Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical Modeling |
| title_fullStr | Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical Modeling |
| title_full_unstemmed | Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical Modeling |
| title_short | Short-Term and Long-Term Displacement of Surface and Shield Tunnel in Soft Soil: Field Observations and Numerical Modeling |
| title_sort | short term and long term displacement of surface and shield tunnel in soft soil field observations and numerical modeling |
| topic | soft soil shield construction numerical model field observation surface displacement tunnel displacement |
| url | https://www.mdpi.com/2076-3417/12/7/3564 |
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