Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil
Accurate prediction of surface settlement induced by tunnel excavation is significant for preventing damage to existing structures under complex geological conditions. The Peck formula is currently considered as an efficient solution for surface settlement prediction. This paper proposes a modified...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6698673 |
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| author | Xiaowu Tang Jiaxin Liang Wei Liu Yuhang Ye Penglu Gan Wenfang Zhao Yue Yu |
| author_facet | Xiaowu Tang Jiaxin Liang Wei Liu Yuhang Ye Penglu Gan Wenfang Zhao Yue Yu |
| author_sort | Xiaowu Tang |
| collection | DOAJ |
| description | Accurate prediction of surface settlement induced by tunnel excavation is significant for preventing damage to existing structures under complex geological conditions. The Peck formula is currently considered as an efficient solution for surface settlement prediction. This paper proposes a modified Peck formula considering geological conditions to improve the accuracy of surface settlement prediction of twin tunnels. The asynchronization of the sinking rate and stability of the vault settlement and surface settlement within the river-affected area may attribute to the groundwater drawdown caused by cofferdam construction on the river. A modified Peck formula is put forward with soil permeability and width-controlling parameters involved. There is a small settlement at the center of the twin tunnels, making the settlement trough upward buckling, which is like a “W” shape. This situation can be accurately predicted by the modified formula with a significantly increased adjusted R-square. The modified formula can accurately predict the surface settlement of tunnels excavated in low permeability soil layers with a permeability coefficient between 10−4 cm/s and 10−7 cm/s, especially in the groundwater drawdown environment. The reliability of the modified Peck formula is verified by other cases in Nanjing and Singapore. |
| format | Article |
| id | doaj-art-4520ec0018e24db4b02d7bf8005a821f |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-4520ec0018e24db4b02d7bf8005a821f2025-02-03T06:07:42ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66986736698673Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability SoilXiaowu Tang0Jiaxin Liang1Wei Liu2Yuhang Ye3Penglu Gan4Wenfang Zhao5Yue Yu6Department of Civil Engineering, Zhejiang University, Hangzhou 310058, ChinaDepartment of Civil Engineering, Zhejiang University, Hangzhou 310058, ChinaSchool of Urban Rail Transportation, Soochow University, 8 Jixue Rd., Suzhou 215131, ChinaDepartment of Civil Engineering, Zhejiang University, Hangzhou 310058, ChinaPower China Huadong Engineering Corporation Limited, Hangzhou 311122, ChinaDepartment of Civil Engineering, Zhejiang University, Hangzhou 310058, ChinaDepartment of Civil Engineering, Zhejiang University, Hangzhou 310058, ChinaAccurate prediction of surface settlement induced by tunnel excavation is significant for preventing damage to existing structures under complex geological conditions. The Peck formula is currently considered as an efficient solution for surface settlement prediction. This paper proposes a modified Peck formula considering geological conditions to improve the accuracy of surface settlement prediction of twin tunnels. The asynchronization of the sinking rate and stability of the vault settlement and surface settlement within the river-affected area may attribute to the groundwater drawdown caused by cofferdam construction on the river. A modified Peck formula is put forward with soil permeability and width-controlling parameters involved. There is a small settlement at the center of the twin tunnels, making the settlement trough upward buckling, which is like a “W” shape. This situation can be accurately predicted by the modified formula with a significantly increased adjusted R-square. The modified formula can accurately predict the surface settlement of tunnels excavated in low permeability soil layers with a permeability coefficient between 10−4 cm/s and 10−7 cm/s, especially in the groundwater drawdown environment. The reliability of the modified Peck formula is verified by other cases in Nanjing and Singapore.http://dx.doi.org/10.1155/2021/6698673 |
| spellingShingle | Xiaowu Tang Jiaxin Liang Wei Liu Yuhang Ye Penglu Gan Wenfang Zhao Yue Yu Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil Advances in Civil Engineering |
| title | Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil |
| title_full | Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil |
| title_fullStr | Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil |
| title_full_unstemmed | Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil |
| title_short | Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil |
| title_sort | modification of peck formula to predict ground surface settlement of twin tunnels in low permeability soil |
| url | http://dx.doi.org/10.1155/2021/6698673 |
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