Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou Province
The deformation characteristics and mechanism of landslides are crucial for slope stability and slope failure warning. Significant deformation occurred in the retaining wall of a fill slope in Furongjiang Town, Zheng’an County, during the rainy season, with notable development of soil wall cracks. I...
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Editorial Office of The Chinese Journal of Geological Hazard and Control
2025-04-01
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| Series: | Zhongguo dizhi zaihai yu fangzhi xuebao |
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| Online Access: | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202308027 |
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| author | Yuanyin ZHANG Wen ZHAO |
| author_facet | Yuanyin ZHANG Wen ZHAO |
| author_sort | Yuanyin ZHANG |
| collection | DOAJ |
| description | The deformation characteristics and mechanism of landslides are crucial for slope stability and slope failure warning. Significant deformation occurred in the retaining wall of a fill slope in Furongjiang Town, Zheng’an County, during the rainy season, with notable development of soil wall cracks. In order to determine the safety status of the slope, geological and hydrological conditions of the slope were investigated, and the characteristics of the retaining wall and surrounding ground cracks were statistically analyzed. The stability of the slope after unsaturated rainfall infiltration was calculated by FLAC3D. The results are as follows: (1) retaining wall cracks develop along the principal plane of maximum principal stress, and the retaining wall settle symmetrically along the axis of the groove; (2) Through the infiltration analysis of rainfall intensity of 10mm/d (light rain) and 250mm/d (heavy rain), the safety factors of light rain on 8 days and 5 days after rainfall cessation decreased by 14.5% and 4.3%, respectively, and the safety factors of heavy rain on 1 day and 2 days after rainfall cessation decreased by 10% and 3.5%, respectively. (3) The deformation mechanism of the slope was analyzed, indicating that the increase in gravitational force after filling and rainfall led to increased sliding force. Rainfall reduced matric suction and effective stress, resulting in decreased shear strength and sliding resistance of the soil. (4) Based on the characteristics of retaining wall cracks and deformation monitoring results, the main sliding direction, geometric boundaries, and landslide zones of the slope were predicted, and subsequent swelling phenomenon at the forefront of the slope confirmed the accuracy of the landslide identification results. |
| format | Article |
| id | doaj-art-bf7381c6f46a4a21b3c009fede8a0ca6 |
| institution | OA Journals |
| issn | 1003-8035 |
| language | zho |
| publishDate | 2025-04-01 |
| publisher | Editorial Office of The Chinese Journal of Geological Hazard and Control |
| record_format | Article |
| series | Zhongguo dizhi zaihai yu fangzhi xuebao |
| spelling | doaj-art-bf7381c6f46a4a21b3c009fede8a0ca62025-08-20T02:38:19ZzhoEditorial Office of The Chinese Journal of Geological Hazard and ControlZhongguo dizhi zaihai yu fangzhi xuebao1003-80352025-04-0136212613510.16031/j.cnki.issn.1003-8035.202308027202308027Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou ProvinceYuanyin ZHANG0Wen ZHAO1Guizhou Power Transmission and Transformation Co. Ltd., Guiyang, Guizhou 550002, ChinaGuizhou Kaiyuan Blasting Engineering Co.Ltd., Guiyang, Guizhou, 551400, ChinaThe deformation characteristics and mechanism of landslides are crucial for slope stability and slope failure warning. Significant deformation occurred in the retaining wall of a fill slope in Furongjiang Town, Zheng’an County, during the rainy season, with notable development of soil wall cracks. In order to determine the safety status of the slope, geological and hydrological conditions of the slope were investigated, and the characteristics of the retaining wall and surrounding ground cracks were statistically analyzed. The stability of the slope after unsaturated rainfall infiltration was calculated by FLAC3D. The results are as follows: (1) retaining wall cracks develop along the principal plane of maximum principal stress, and the retaining wall settle symmetrically along the axis of the groove; (2) Through the infiltration analysis of rainfall intensity of 10mm/d (light rain) and 250mm/d (heavy rain), the safety factors of light rain on 8 days and 5 days after rainfall cessation decreased by 14.5% and 4.3%, respectively, and the safety factors of heavy rain on 1 day and 2 days after rainfall cessation decreased by 10% and 3.5%, respectively. (3) The deformation mechanism of the slope was analyzed, indicating that the increase in gravitational force after filling and rainfall led to increased sliding force. Rainfall reduced matric suction and effective stress, resulting in decreased shear strength and sliding resistance of the soil. (4) Based on the characteristics of retaining wall cracks and deformation monitoring results, the main sliding direction, geometric boundaries, and landslide zones of the slope were predicted, and subsequent swelling phenomenon at the forefront of the slope confirmed the accuracy of the landslide identification results.https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202308027landslide identificationflac3drainfall infiltrationcrack in retaining wallstability analysis |
| spellingShingle | Yuanyin ZHANG Wen ZHAO Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou Province Zhongguo dizhi zaihai yu fangzhi xuebao landslide identification flac3d rainfall infiltration crack in retaining wall stability analysis |
| title | Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou Province |
| title_full | Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou Province |
| title_fullStr | Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou Province |
| title_full_unstemmed | Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou Province |
| title_short | Landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis：A case study of fill slope in Zheng’an County, Guizhou Province |
| title_sort | landslide identification based on characteristics of retaining wall fractures and rainfall stability analysis a case study of fill slope in zheng an county guizhou province |
| topic | landslide identification flac3d rainfall infiltration crack in retaining wall stability analysis |
| url | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202308027 |
| work_keys_str_mv | AT yuanyinzhang landslideidentificationbasedoncharacteristicsofretainingwallfracturesandrainfallstabilityanalysisacasestudyoffillslopeinzhengancountyguizhouprovince AT wenzhao landslideidentificationbasedoncharacteristicsofretainingwallfracturesandrainfallstabilityanalysisacasestudyoffillslopeinzhengancountyguizhouprovince |