Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering
This paper proposes a new method for predicting the displacement and internal force of constructed tunnels induced by adjacent excavation with dewatering. In this method, the total excavation-induced additional stress on the constructed tunnel is derived by superposing the additional stresses induce...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5548817 |
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| author | Panpan Guo Feifei Liu Gang Lei Xian Li Cheng-wei Zhu Yixian Wang Mengmeng Lu Kang Cheng Xiaonan Gong |
| author_facet | Panpan Guo Feifei Liu Gang Lei Xian Li Cheng-wei Zhu Yixian Wang Mengmeng Lu Kang Cheng Xiaonan Gong |
| author_sort | Panpan Guo |
| collection | DOAJ |
| description | This paper proposes a new method for predicting the displacement and internal force of constructed tunnels induced by adjacent excavation with dewatering. In this method, the total excavation-induced additional stress on the constructed tunnel is derived by superposing the additional stresses induced by excavation unloading and dewatering effects. The additional stress induced by unloading effect is calculated using Mindlin’s solution. The additional stress induced by dewatering effect is calculated using the principle of effective stress and the Dupuit precipitation funnel curve. With the beam on elastic foundation method, the total additional stress is then used for calculating the tunnel displacement and internal force caused by adjacent excavation with dewatering. Based on three well-documented case histories, the performance of the proposed method is verified. Moreover, a parametric analysis is also performed to capture the effects of excavation depth, tunnel-to-excavation distance, initial water level, excavation plan view size, and specific yield on the responses of the constructed tunnels. The results indicate that the effect of excavation depth on the tunnel maximum vertical displacement, maximum bending moment, and maximum shear force is more significant at an excavation depth greater than the cover depth of the constructed tunnel. The tunnel maximum vertical displacement, maximum bending moment, and maximum shear force decrease nonlinearly with an increase in the tunnel-to-excavation distance and the initial water level. Among the investigated parameters, the excavation dimension in the tunnel longitudinal direction affects most the tunnel responses. The effect of specific yield on the tunnel displacement and internal force induced by adjacent excavation with dewatering becomes more obvious as increasing the initial water level and excavation depth. |
| format | Article |
| id | doaj-art-f680ab7d1c254737b5629cdb129d17e3 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-f680ab7d1c254737b5629cdb129d17e32025-02-03T06:05:43ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55488175548817Predicting Response of Constructed Tunnel to Adjacent Excavation with DewateringPanpan Guo0Feifei Liu1Gang Lei2Xian Li3Cheng-wei Zhu4Yixian Wang5Mengmeng Lu6Kang Cheng7Xiaonan Gong8Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaSchool of Civil Engineering, Hefei University of Technology, Hefei 230009, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaSchool of Civil Engineering, Hefei University of Technology, Hefei 230009, ChinaInstitut für Geotechnik, Universität für Bodenkultur Wien, Feistmantelstrasse 4, 1180 Vienna, AustriaSchool of Civil Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaThis paper proposes a new method for predicting the displacement and internal force of constructed tunnels induced by adjacent excavation with dewatering. In this method, the total excavation-induced additional stress on the constructed tunnel is derived by superposing the additional stresses induced by excavation unloading and dewatering effects. The additional stress induced by unloading effect is calculated using Mindlin’s solution. The additional stress induced by dewatering effect is calculated using the principle of effective stress and the Dupuit precipitation funnel curve. With the beam on elastic foundation method, the total additional stress is then used for calculating the tunnel displacement and internal force caused by adjacent excavation with dewatering. Based on three well-documented case histories, the performance of the proposed method is verified. Moreover, a parametric analysis is also performed to capture the effects of excavation depth, tunnel-to-excavation distance, initial water level, excavation plan view size, and specific yield on the responses of the constructed tunnels. The results indicate that the effect of excavation depth on the tunnel maximum vertical displacement, maximum bending moment, and maximum shear force is more significant at an excavation depth greater than the cover depth of the constructed tunnel. The tunnel maximum vertical displacement, maximum bending moment, and maximum shear force decrease nonlinearly with an increase in the tunnel-to-excavation distance and the initial water level. Among the investigated parameters, the excavation dimension in the tunnel longitudinal direction affects most the tunnel responses. The effect of specific yield on the tunnel displacement and internal force induced by adjacent excavation with dewatering becomes more obvious as increasing the initial water level and excavation depth.http://dx.doi.org/10.1155/2021/5548817 |
| spellingShingle | Panpan Guo Feifei Liu Gang Lei Xian Li Cheng-wei Zhu Yixian Wang Mengmeng Lu Kang Cheng Xiaonan Gong Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering Geofluids |
| title | Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering |
| title_full | Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering |
| title_fullStr | Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering |
| title_full_unstemmed | Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering |
| title_short | Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering |
| title_sort | predicting response of constructed tunnel to adjacent excavation with dewatering |
| url | http://dx.doi.org/10.1155/2021/5548817 |
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