Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide Piles
With the extensive construction of high-voltage power grid projects in complex mountainous terrains, rainfall-induced slope instability poses a significant threat to the safety of transmission tower foundations. This study focuses on a power transmission and transformation project in Huizhou City, G...
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MDPI AG
2025-06-01
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| author | Guoliang Huang Xiaolong Huang Caiyan Lin Ji Shi Xiongwu Tao Jiaxiang Lin Bingxiang Yuan |
| author_facet | Guoliang Huang Xiaolong Huang Caiyan Lin Ji Shi Xiongwu Tao Jiaxiang Lin Bingxiang Yuan |
| author_sort | Guoliang Huang |
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| description | With the extensive construction of high-voltage power grid projects in complex mountainous terrains, rainfall-induced slope instability poses a significant threat to the safety of transmission tower foundations. This study focuses on a power transmission and transformation project in Huizhou City, Guangdong Province. Using MIDAS GTS NX 2019 (v1.2), an unsaturated seepage-mechanics coupling model was established to systematically investigate the influence of slope ratios (1:0.75, 1:1, and 1:1.25) on slope stability under rainfall conditions and the reinforcement effects of anti-slide piles. The results demonstrate that slope ratios significantly govern slope responses. For steep slopes (1:0.75), post-rainfall matrix suction loss reached 43.2%, peak displacement attained 74.49 mm, and the safety factor decreased by 12.5%. In contrast, gentle slopes (1:1.25) exhibited superior stability. Anti-slide piles effectively controlled displacement growth (≤9.15%), but pile bending moments increased markedly with steeper slope ratios, accompanied by a notable expansion of the plastic zone at the slope toe. The study reveals a destabilization mechanism characterized by “seepage–strength degradation–displacement synergy” and recommends engineering practices adopting slope ratios of 1:1–1:1.25, combined with anti-slide piles (spacing ≤ 1.5 m) and dynamic drainage measures. These findings provide critical guidance for the design of transmission tower slopes in mountainous regions. |
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| issn | 2075-5309 |
| language | English |
| publishDate | 2025-06-01 |
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| spelling | doaj-art-c8f88d73d3944c2d8f24e1b3f9368a112025-08-20T02:24:23ZengMDPI AGBuildings2075-53092025-06-011512206610.3390/buildings15122066Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide PilesGuoliang Huang0Xiaolong Huang1Caiyan Lin2Ji Shi3Xiongwu Tao4Jiaxiang Lin5Bingxiang Yuan6Guangdong Power Grid Huizhou Power Supply Bureau, Huizhou 516000, ChinaGuangdong Power Grid Huizhou Power Supply Bureau, Huizhou 516000, ChinaGuangdong Power Grid Huizhou Power Supply Bureau, Huizhou 516000, ChinaGuangdong Power Grid Huizhou Power Supply Bureau, Huizhou 516000, ChinaGuangdong Power Grid Huizhou Power Supply Bureau, Huizhou 516000, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaWith the extensive construction of high-voltage power grid projects in complex mountainous terrains, rainfall-induced slope instability poses a significant threat to the safety of transmission tower foundations. This study focuses on a power transmission and transformation project in Huizhou City, Guangdong Province. Using MIDAS GTS NX 2019 (v1.2), an unsaturated seepage-mechanics coupling model was established to systematically investigate the influence of slope ratios (1:0.75, 1:1, and 1:1.25) on slope stability under rainfall conditions and the reinforcement effects of anti-slide piles. The results demonstrate that slope ratios significantly govern slope responses. For steep slopes (1:0.75), post-rainfall matrix suction loss reached 43.2%, peak displacement attained 74.49 mm, and the safety factor decreased by 12.5%. In contrast, gentle slopes (1:1.25) exhibited superior stability. Anti-slide piles effectively controlled displacement growth (≤9.15%), but pile bending moments increased markedly with steeper slope ratios, accompanied by a notable expansion of the plastic zone at the slope toe. The study reveals a destabilization mechanism characterized by “seepage–strength degradation–displacement synergy” and recommends engineering practices adopting slope ratios of 1:1–1:1.25, combined with anti-slide piles (spacing ≤ 1.5 m) and dynamic drainage measures. These findings provide critical guidance for the design of transmission tower slopes in mountainous regions.https://www.mdpi.com/2075-5309/15/12/2066transmission tower foundationslope stabilityrainfallanti-slide pilesnumerical simulation |
| spellingShingle | Guoliang Huang Xiaolong Huang Caiyan Lin Ji Shi Xiongwu Tao Jiaxiang Lin Bingxiang Yuan Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide Piles Buildings transmission tower foundation slope stability rainfall anti-slide piles numerical simulation |
| title | Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide Piles |
| title_full | Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide Piles |
| title_fullStr | Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide Piles |
| title_full_unstemmed | Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide Piles |
| title_short | Research on Stability of Transmission Tower Slopes with Different Slope Ratios Under Rainfall Conditions and Reinforcement Effects of Anti-Slide Piles |
| title_sort | research on stability of transmission tower slopes with different slope ratios under rainfall conditions and reinforcement effects of anti slide piles |
| topic | transmission tower foundation slope stability rainfall anti-slide piles numerical simulation |
| url | https://www.mdpi.com/2075-5309/15/12/2066 |
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