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<p>The application of different numerical methods for stability analysis of slopes has always been considered and many researchers have used these methods as a suitable solution to analyze the stability of slopes. In this research, finite element numerical methods have been used with the help of two-dimensional Plaxis v8.6 software to analyze the stability of the left abutment slope of Narmab dam. For this purpose, after creating an analytical model in the software, taking into account the variables of slope from 45 to 90°, saturation height and reinforcing anchors with different lengths, the left abutment slope of the dam has been evaluated. The results indicate that with an increase of the slope, the values of the safety factor decrease sharply. The highest safety factor in the slope of 45° is equal to 1.75 and the lowest value is related to the vertical slope equal to 0.95. Saturation up to half of the slope height causes a decrease in the ratio of the safety factor of the slope by about 7.5 to 10% compared to the dry state. Also, in different states of saturation, it was observed that the presence of an anchor with a length of 10&#xa0;m has almost no effect on the safety factor of the slope. The reason for this is that the anchor is not placed behind the rupture wedge. But by increasing the length of the anchor, the stability of the slope is noticeably improved, so that the highest increase in the ratio of the safety factor is obtained useing an anchor with a length of 40&#xa0;m in a dry state, which is equal to 43%.</p>

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Finite Element Analysis of the Effects of Slope Angle, Saturation, and Anchor Length on the Stability of the Left Abutment Slope of Narmab Dam

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Seyed Abolhasan Hosseini,
  • Davood Fereidooni

摘要

The application of different numerical methods for stability analysis of slopes has always been considered and many researchers have used these methods as a suitable solution to analyze the stability of slopes. In this research, finite element numerical methods have been used with the help of two-dimensional Plaxis v8.6 software to analyze the stability of the left abutment slope of Narmab dam. For this purpose, after creating an analytical model in the software, taking into account the variables of slope from 45 to 90°, saturation height and reinforcing anchors with different lengths, the left abutment slope of the dam has been evaluated. The results indicate that with an increase of the slope, the values of the safety factor decrease sharply. The highest safety factor in the slope of 45° is equal to 1.75 and the lowest value is related to the vertical slope equal to 0.95. Saturation up to half of the slope height causes a decrease in the ratio of the safety factor of the slope by about 7.5 to 10% compared to the dry state. Also, in different states of saturation, it was observed that the presence of an anchor with a length of 10 m has almost no effect on the safety factor of the slope. The reason for this is that the anchor is not placed behind the rupture wedge. But by increasing the length of the anchor, the stability of the slope is noticeably improved, so that the highest increase in the ratio of the safety factor is obtained useing an anchor with a length of 40 m in a dry state, which is equal to 43%.