Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation
Abstract The seepage erosion of underground defective pipelines can negatively affect the structure and stability of the surrounding strata, leading to severe urban ground collapses. Revealing the failure mechanism and mechanical characteristic is crucial for their prevention and mitigation. A large...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-90146-5 |
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| _version_ | 1849724100922048512 |
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| author | Jixiang Guo Yanjun Zhang Yuxiang Cheng Xin Zhang Haoxin Shi Jianqiao Zheng Yongjie Ma |
| author_facet | Jixiang Guo Yanjun Zhang Yuxiang Cheng Xin Zhang Haoxin Shi Jianqiao Zheng Yongjie Ma |
| author_sort | Jixiang Guo |
| collection | DOAJ |
| description | Abstract The seepage erosion of underground defective pipelines can negatively affect the structure and stability of the surrounding strata, leading to severe urban ground collapses. Revealing the failure mechanism and mechanical characteristic is crucial for their prevention and mitigation. A large-scale physical modeling experiment was carried out and a coupled Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) numerical model was proposed. The microscopic soil–water interactions during the seepage erosion process were researched, and the effects of groundwater, overlying strata thickness, defect size, and particle size were evaluated. Results showed that the groundwater seepage would promote soil movement, and the defective pipeline provided sufficient space. The seepage erosion rate increased with the flow velocity, and when it exceeded the threshold (Vmax), the disintegration of the strata occurred. The thickness of the overlying strata was positively correlated with the time when the cavity reached the surface, and it had little effect on the erosion rate before the defect was exposed. Defect size and particle size had minimal effect on the erosion area. The findings of the mechanistic analysis indicated that the effects of seepage erosion on the stress–strain characteristics occurs mainly during the cavity development stage. |
| format | Article |
| id | doaj-art-c245673cc8b84cedad467fd094feac4a |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-c245673cc8b84cedad467fd094feac4a2025-08-20T03:10:50ZengNature PortfolioScientific Reports2045-23222025-02-0115112010.1038/s41598-025-90146-5Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulationJixiang Guo0Yanjun Zhang1Yuxiang Cheng2Xin Zhang3Haoxin Shi4Jianqiao Zheng5Yongjie Ma6College of Construction Engineering, Jilin UniversityCollege of Construction Engineering, Jilin UniversityKey Lab of Groundwater Resource and Environment, Ministry of Education, Jilin UniversityCollege of Construction Engineering, Jilin UniversityCollege of Construction Engineering, Jilin UniversityCollege of Construction Engineering, Jilin UniversityZhejiang Huadong Geotechnical Investigation & Design Institute CO., LTDAbstract The seepage erosion of underground defective pipelines can negatively affect the structure and stability of the surrounding strata, leading to severe urban ground collapses. Revealing the failure mechanism and mechanical characteristic is crucial for their prevention and mitigation. A large-scale physical modeling experiment was carried out and a coupled Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) numerical model was proposed. The microscopic soil–water interactions during the seepage erosion process were researched, and the effects of groundwater, overlying strata thickness, defect size, and particle size were evaluated. Results showed that the groundwater seepage would promote soil movement, and the defective pipeline provided sufficient space. The seepage erosion rate increased with the flow velocity, and when it exceeded the threshold (Vmax), the disintegration of the strata occurred. The thickness of the overlying strata was positively correlated with the time when the cavity reached the surface, and it had little effect on the erosion rate before the defect was exposed. Defect size and particle size had minimal effect on the erosion area. The findings of the mechanistic analysis indicated that the effects of seepage erosion on the stress–strain characteristics occurs mainly during the cavity development stage.https://doi.org/10.1038/s41598-025-90146-5Ground collapseDefective pipelinePhysical model experimentInternal erosionCFD-DEM |
| spellingShingle | Jixiang Guo Yanjun Zhang Yuxiang Cheng Xin Zhang Haoxin Shi Jianqiao Zheng Yongjie Ma Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation Scientific Reports Ground collapse Defective pipeline Physical model experiment Internal erosion CFD-DEM |
| title | Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation |
| title_full | Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation |
| title_fullStr | Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation |
| title_full_unstemmed | Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation |
| title_short | Study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation |
| title_sort | study on urban ground collapse induced by defective pipelines based on physical model experiments and numerical simulation |
| topic | Ground collapse Defective pipeline Physical model experiment Internal erosion CFD-DEM |
| url | https://doi.org/10.1038/s41598-025-90146-5 |
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