Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

COMPARISON OF SAFETY FACTOR AND GEOSYNTETIC REINFORCEMENT REQUIREMENT FOR SLOPE STABILITY USing 2-D AND 3-D ANALYSIS METHOD


DOI: 10.5937/jaes0-34051 
This is an open access article distributed under the CC BY 4.0
Creative Commons License

Volume 20 article 1007 pages: 1016-1026

Putu Tantri K.Sari
Civil Engineering Department, Institute Technology of Sepuluh Nopember,Surabaya, Indonesia

Yudhi Lastiasih
Civil Engineering Department, Institute Technology of Sepuluh Nopember,Surabaya, Indonesia

Nur ‘Arfiati Shoffiana
Magister student in Civil Engineering Department, Institute Technology of Sepuluh Nopember,Surabaya, Indonesia

The analysis of landslide slope stability since 1960s is the development of a 2-D structure proposed by various experts, through the 3-D method. Most of these previous studies stated that the ratio of 3-D and 2-D safety factors was more than one for cohesive and less than one for non-cohesive soils. These were because several required slope reinforcements were affected by the safety factors, with the analytical differences of the 2-D and 3-D methods causing a distinction in the requirements. These differences further cause problems by underestimating or overestimating the design. Therefore, this study aims to determine a comparative analysis of 2-D and 3-D slope stability on several required reinforcements. The analyses of the 2-D and 3-D structures were carried out using the LEM proposed by Fellenius and Hovland, respectively. The comparison of the several required reinforcements was also conducted using geotextile with Tult = 200 kN/m. The results showed that the reinforcements required with geotextile between 2-D and 3-D analysis were relatively similar on homogeneous soils. Meanwhile, the geotextile reinforcement needs were different for heterogeneous soils. Under different certain conditions, the need for 2-D reinforcement was greater and lesser than 3-D. In addition, the difference in the reinforcement required for the analysis of these structures was between 1-8 layers of geotextile, depending on soil parameters, slope, and length of the landslide field.

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This paper was supported by the Hibah Penelitian Dana Department Dana Unit Kerja Batch 2 number 1958/PKS/ITS/2021 grant from Institute Technology of Sepuluh Nopember, Surabaya, Indonesia 2021. The author wishes to express her gratitude for the support given to this work

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