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Analysis of factors affecting the stability of high-fill embankments on slope foundation
In order to clarify the influence characteristics of various factors in the stability of high-fill embankments with slope foundation, the stability of high-fill embankments with slope foundation was systematically analyzed from the aspects of embankment height, pavement width, embankment gradient, slope foundation gradient, slope foundation-embankment relative stiffness, and slope foundation-embankment contact form by using numerical analyses. The results show that: the horizontal displacement and settlement of embankment, foot of embankment uplift increase with the increase of embankment height, pavement width, embankment gradient and slope foundation gradient; And the possibility of lateral extrusion of the embankment also increases. The safety coefficient of the embankment decreases, which is not conducive to the stabilization of embankment slope. Horizontal displacement and settlement of embankment, foot of embankment uplift decrease with the increase of embankment slope platform width, slope foundation stiffness and embankment slope step width. The safety coefficient of embankment is improved in these ways, which contributes to the stability of embankment. When the pavement width exceeds 20m, increasing the pavement width has less effect on the stability of the embankment; and increasing the width of the embankment slope platform has limited effect on improving the safety coefficient of the embankment. The safety coefficient of embankment increases with the gradient of slope foundation decreases; But when gradient is slower than 1:3.5, the improvement effect of embankment stability decreases. It can effectively reduce embankment settlement and uplift of embankment foot by setting the contact surface between slope foundation and embankment into a step. The horizontal displacement of the embankment decreases with the increase of the step width, but the horizontal displacement reduction gradually decreases. And it can effectively reduce the settlement of the embankment and the uplift of embankment foot. But when the step width is more than 1.5 m, it will have less influence on the settlement and foot uplift of embankment; And the safety of the embankment is also improved.
Analysis of factors affecting the stability of high-fill embankments on slope foundation
In order to clarify the influence characteristics of various factors in the stability of high-fill embankments with slope foundation, the stability of high-fill embankments with slope foundation was systematically analyzed from the aspects of embankment height, pavement width, embankment gradient, slope foundation gradient, slope foundation-embankment relative stiffness, and slope foundation-embankment contact form by using numerical analyses. The results show that: the horizontal displacement and settlement of embankment, foot of embankment uplift increase with the increase of embankment height, pavement width, embankment gradient and slope foundation gradient; And the possibility of lateral extrusion of the embankment also increases. The safety coefficient of the embankment decreases, which is not conducive to the stabilization of embankment slope. Horizontal displacement and settlement of embankment, foot of embankment uplift decrease with the increase of embankment slope platform width, slope foundation stiffness and embankment slope step width. The safety coefficient of embankment is improved in these ways, which contributes to the stability of embankment. When the pavement width exceeds 20m, increasing the pavement width has less effect on the stability of the embankment; and increasing the width of the embankment slope platform has limited effect on improving the safety coefficient of the embankment. The safety coefficient of embankment increases with the gradient of slope foundation decreases; But when gradient is slower than 1:3.5, the improvement effect of embankment stability decreases. It can effectively reduce embankment settlement and uplift of embankment foot by setting the contact surface between slope foundation and embankment into a step. The horizontal displacement of the embankment decreases with the increase of the step width, but the horizontal displacement reduction gradually decreases. And it can effectively reduce the settlement of the embankment and the uplift of embankment foot. But when the step width is more than 1.5 m, it will have less influence on the settlement and foot uplift of embankment; And the safety of the embankment is also improved.
Analysis of factors affecting the stability of high-fill embankments on slope foundation
Atlantis Highlights in Engineering
Zhao, Gaofeng (editor) / Mei, Guoxiong (editor) / Xu, Zengguang (editor) / Zhang, Fei (editor) / Yang, Chao (author) / Yang, Guang-hui (author)
International Conference on Civil Architecture and Urban Engineering ; 2023 ; Xiamen, China
2024-02-11
15 pages
Article/Chapter (Book)
Electronic Resource
English
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