SLOPE STABILITY ANALYSIS WITH SLOPE STABILIZING PILES: A CASE STUDY

Date

2023-3

Author

Karsavuran, Başak

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Slope stability is one of the most critical issues in geotechnical engineering due to disastrous effects on the environment and human health and economic losses in case of failure. There are various stabilization methods where mostly stabilizing piles are widely used to maintain stability. These piles are mainly subjected to lateral pressure caused by the horizontal movement of the sliding mass on the slope. In this research, the effects of the piles on stabilizing slopes are studied with the help of an actual case by means of monitoring data. Afterward, a parametric study was carried out to determine the impact of the following parameters: a. The effect of center-to-center pile spacing and pile diameter ratio b. The embedment depth of the piles into the sound layers c. Location of the piles on the slope. The safety factors after the installation of piles of parameter variations under static and earthquake conditions were compared. The analyses were carried out using the finite element method (FEM) (2D and 3D) and the limit equilibrium software. For the given case study, soil arching and the effect of pile parameters on the design and soil behavior around piles were also evaluated for the stabilized slope. Calculated results were compared with the field inclinometer readings for the case study. It is seen that the ratio of the pile spacing to diameter and the location of the pile affected the factor of safety. The data concludes that based on the orientation of the weak layers, failure can occur even with the existence of the stabilization systems. It is seen that the lateral swelling pressure of soil is crucial for the pile design due to potential failure.

Subject Keywords

2-D and 3-D Finite element analyses, Swelling clay, Soil-pile interaction, Soil displacement monitoring, Soil arching, Slope stabilizing piles, Pile spacing

URI

https://hdl.handle.net/11511/110085

Collections

Graduate School of Natural and Applied Sciences, Thesis