Design of micropiles to increase earth slopes stability

Sun, Shuwei; Wang, Jiachen; Bian, Xiaofeng

doi:10.1007/s11771-013-1623-7

Cited by 13 publications

(8 citation statements)

References 5 publications

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“…On the other hand, coupled analysis approach is receiving more attention in the recent years where powerful numerical tools (2D and 3D finite element analyses) are becoming increasingly available [4,[9][10][11][12]. In the coupled approach both the pile response and slope stability are considered simultaneously.…”

Section: Introductionmentioning

confidence: 99%

The effect of pile parameters on the factor of safety of piled-slopes using 3D numerical analysis

2017

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Slope stability can be achieved using different methods. Piles are commonly used to stabilize slopes or to improve slope stability. Stabilized slopes with piles are numerically studied in the current paper. A 3 dimensional (3D) finite element study is carried out to investigate the effect of different parameters on the stability of slopes stabilized with piles. A 3D finite element model was developed using the finite element program PLAXIS. The 3D model was verified using experimental data from the literature for a stabilized silty sand slope in a large-scale physical model. A parametric study was undertaken to study the effect of pile position, pile inclination, pile length and pile diameter on the factor of safety of the piled-slopes. The findings of the research were compared to other findings from the literature. The results show that using the 3D aspect gives more insight into the complicated slope stability problem. The study determines the optimum location of the pile and its optimum inclination to achieve the maximum stability. It shows that after a certain length of the pile, increasing the pile length becomes unnecessary and that the diameter of the pile has a relatively minor effect on the factor of safety of piled-slopes.

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Section: Introductionmentioning

confidence: 99%

The effect of pile parameters on the factor of safety of piled-slopes using 3D numerical analysis

2017

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“…The numerical model was constructed following the procedure of staged construction, and the stability of the tailings dam was evaluated at each stage of construction. The numerical model was verified through the analysis of a well-documented case study of the Aitik upstream mine tailings dam in Sweden whose geometry and soil properties have been reported by many researchers [35][36][37][38]. This case study in particular was selected due to its complexity and authenticity.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the leaked water filled up the settling pond, whereby the water flowed to nearby rivers. No definite conclusion concerning the cause of the failure was reached [35,36,38,44]. The finite element analysis in this case study has been performed on section E-F of the dam, shown in Figure 2.…”

Section: Validationmentioning

confidence: 99%

Improving Tailings Dam Safety via Soil Treatment

Alsharedah,

El Naggar,

Ahmed

2023

Sustainability

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Mine tailings are the byproduct of mining activities, which need to be disposed of once the minerals in the ore are extracted. They can be disposed of in either dry or wet forms. The latter is most common, with the tailings being disposed of in the form of slurry inside retention structures. The retention structure may be a natural or manmade dam, with a predominant use of the upstream method due to its cost-effectiveness. This study analyzes the stability of an upstream tailings dam considering its staged construction. A two-dimensional nonlinear finite element model was developed using the program Plaxis 2-D to investigate the potential for stabilizing the tailings dam by using emulsified polymer and a mixture composed of cement kiln dust (CKD) and re-cycled gypsum (B). The numerical model demonstrated that utilizing a CKD: B mix increased the overall stability of the tailings impoundment above the conventional 1.5 safety factor requirements and indicated its usefulness in constructing robust dams whilst still being environmentally friendly.

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“…Micropiles are defined as small-diameter, drilled piles composed of injected grout with some form of steel reinforcement placed in the center of grout to resist the load (Bruce et al, 1995;Bruce and Juran, 1997;Sun et al, 2013). The central reinforcing element is either a high-strength steel bar or a tube that is secured in the grout injected under high pressure to improve bonding with the surrounding soil.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Micropiles With Different Configuration Settings for Landslide Stabilization Based on Large-Scale Experimental Testing

Yan

Tong

et al. 2021

Front. Earth Sci.

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In this study, a large-scale model test was performed to investigate the effect of the single-row and double-row micropiles on the landside stabilization. For two different testing configuration settings, the bending moment along the micropiles, failure mode, and force condition were captured and compared. It is found that the landslide thrust on piles was distributed in a triangular shape. The piles in the front row carried greater pressure than the piles in the rear row. The resistance of the sliding body behind the pile was distributed in a parabolic shape, and mainly concentrated on the middle of the pile. The piles were destroyed due to the combined shearing and bending impact applied near the slipping surface. The boundary of the failure zone was from the position of two times the pile diameter under the slipping surface to the position of two and a half times the pile diameter above the slipping surface. Under the action of the landslide, each row of piles deformed at the same time. The capability of landslide stabilization for double-row piles was better than that of a single-row pile. The sections of the pile above slide surface were mainly subjected to negative bending moments and were distributed mainly within the pile length range of one-third of the anti-sliding section above the sliding surface. The pile body of the embedded section located in the range of ten times the pile diameter below the sliding surface was subjected to a positive bending moment.

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Design of micropiles to increase earth slopes stability

Cited by 13 publications

References 5 publications

The effect of pile parameters on the factor of safety of piled-slopes using 3D numerical analysis

The effect of pile parameters on the factor of safety of piled-slopes using 3D numerical analysis

Improving Tailings Dam Safety via Soil Treatment

Evaluation of Micropiles With Different Configuration Settings for Landslide Stabilization Based on Large-Scale Experimental Testing

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