Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis
Deep foundation pit excavations have become more extensive for the construction of underground spaces with rapid urbanization. Diaphragm walls are commonly used to support deep excavations. However, due to the complex geological conditions in karst areas, construction accidents frequently occur duri...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2024/5834253 |
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| _version_ | 1832559711674695680 |
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| author | Xingzhong Nong Yanhong Wang Benhai Lin Wentian Xu Wuzhang Luo Ren Tang |
| author_facet | Xingzhong Nong Yanhong Wang Benhai Lin Wentian Xu Wuzhang Luo Ren Tang |
| author_sort | Xingzhong Nong |
| collection | DOAJ |
| description | Deep foundation pit excavations have become more extensive for the construction of underground spaces with rapid urbanization. Diaphragm walls are commonly used to support deep excavations. However, due to the complex geological conditions in karst areas, construction accidents frequently occur during the excavation of foundation pits. This study aims to investigate the performance of diaphragm walls in karst areas through field monitoring analysis. A kick-in deformation mode of the diaphragm wall is revealed during the foundation pit excavation. Furthermore, the results show that the diaphragm walls present multiple deformation modes rather than a single mode. Additionally, this study proposes a method to calculate the lateral displacement of the diaphragm walls at different depths. It is found that the karst caves have a considerable impact on the stability of diaphragm walls, as demonstrated by their lateral displacement. The hidden karst caves reduce the bearing capacity of the bedrock, rendering it insufficient to resist the active earth pressure. As a result, the bottom of the diaphragm wall is kicked into the foundation pit, causing significant lateral displacement and posing risks during excavation. The findings of this study contribute to the design and construction of similar excavations in karst areas. |
| format | Article |
| id | doaj-art-9fcf4c1348614cc69da1765ca5817bee |
| institution | Kabale University |
| issn | 1687-8094 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-9fcf4c1348614cc69da1765ca5817bee2025-02-03T01:29:25ZengWileyAdvances in Civil Engineering1687-80942024-01-01202410.1155/2024/5834253Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring AnalysisXingzhong Nong0Yanhong Wang1Benhai Lin2Wentian Xu3Wuzhang Luo4Ren Tang5Guangzhou Metro Design & Research Institute Co. Ltd.Guangzhou Metro Design & Research Institute Co. Ltd.School of Civil EngineeringGuangzhou Metro Design & Research Institute Co. Ltd.Guangzhou Geotechnical Investigation & Engineering Design Co. Ltd.School of Civil EngineeringDeep foundation pit excavations have become more extensive for the construction of underground spaces with rapid urbanization. Diaphragm walls are commonly used to support deep excavations. However, due to the complex geological conditions in karst areas, construction accidents frequently occur during the excavation of foundation pits. This study aims to investigate the performance of diaphragm walls in karst areas through field monitoring analysis. A kick-in deformation mode of the diaphragm wall is revealed during the foundation pit excavation. Furthermore, the results show that the diaphragm walls present multiple deformation modes rather than a single mode. Additionally, this study proposes a method to calculate the lateral displacement of the diaphragm walls at different depths. It is found that the karst caves have a considerable impact on the stability of diaphragm walls, as demonstrated by their lateral displacement. The hidden karst caves reduce the bearing capacity of the bedrock, rendering it insufficient to resist the active earth pressure. As a result, the bottom of the diaphragm wall is kicked into the foundation pit, causing significant lateral displacement and posing risks during excavation. The findings of this study contribute to the design and construction of similar excavations in karst areas.http://dx.doi.org/10.1155/2024/5834253 |
| spellingShingle | Xingzhong Nong Yanhong Wang Benhai Lin Wentian Xu Wuzhang Luo Ren Tang Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis Advances in Civil Engineering |
| title | Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis |
| title_full | Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis |
| title_fullStr | Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis |
| title_full_unstemmed | Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis |
| title_short | Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis |
| title_sort | performance of diaphragm walls during ultra deep excavations in karst areas field monitoring analysis |
| url | http://dx.doi.org/10.1155/2024/5834253 |
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