Civil Engineering and Architecture Vol. 11(4), pp. 2219 - 2230
DOI: 10.13189/cea.2023.110439
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An Experimental Study of Bearing Capacity and Slope Stability of Residual Slope Model with Pile Reinforcement

Eko Indah Susanti ^1,*, As’ad Munawir ², Yulvi Zaika ², Sri Murni Dewi ^2
1 Doctoral Program, Brawijaya University, Indonesia
² Department of Civil Engineering, Brawijaya University, Indonesia

ABSTRACT

Based on its geographical location, most of Indonesia's territory consists of residual soil. Residual soil on slopes has been a problem that often occurs and causes landslides. We can use various efforts to prevent landslides and overcome other issues on slopes, especially residual soil, by providing reinforcement. In this study, we can increase the strength of the slopes to be more stable by providing pile reinforcement to improve the safety of the slopes. First, we observed a scaled slope model with and without pile reinforcement. Residual slope modeling was carried out using a test box with a slope inclination of 37° and using a composite concrete pile as a model for pile reinforcement. Test models with different diameters (2.54 cm, 3.175 cm, and 3.81 cm) and the pile spacing were varied (7.5 cm, 10 cm, and 12.5 cm). This test was performed using an experimental model in the laboratory aimed at understanding the failure mechanism or failure of the slope. We identified the maximum failure load value for the slope to resist sliding. Problems in the laboratory were analyzed using the finite element method by changing the form of 3D slope modeling to 2D modeling. Then, we compared the experimental results in the laboratory with the finite element analysis method. Based on the FE Method test results, the SF of slopes reinforced with single-row experienced a safety factor improvement of 17.621 % in FEM (2D) compared to slopes modeled without reinforcement. The most significant bearing capacity and SF value were found in the diameter of 3.175 cm and a distance of 10 cm. The effect of diameter and spacing between piles on slope stability is when the pile diameter increases, the pile spacing becomes smaller, and the critical slip surface also becomes deeper until a specific diameter and distance are reached. This condition causes the slope to become stable. In addition, the study result showed that reinforced slopes are prone to failure of the rotational slope.

KEYWORDS
Pile Reinforcement, Residual Slope Model, Bearing Capacity, Safety Factor, Finite Element Method

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Eko Indah Susanti , As’ad Munawir , Yulvi Zaika , Sri Murni Dewi , "An Experimental Study of Bearing Capacity and Slope Stability of Residual Slope Model with Pile Reinforcement," Civil Engineering and Architecture, Vol. 11, No. 4, pp. 2219 - 2230, 2023. DOI: 10.13189/cea.2023.110439.

(b). APA Format:
Eko Indah Susanti , As’ad Munawir , Yulvi Zaika , Sri Murni Dewi (2023). An Experimental Study of Bearing Capacity and Slope Stability of Residual Slope Model with Pile Reinforcement. Civil Engineering and Architecture, 11(4), 2219 - 2230. DOI: 10.13189/cea.2023.110439.