Sefrina, Ani (2025) Analisis Stabilitas Lereng dengan Perkuatan Soil Nailing dengan Variasi Beban Gempa pada Proyek Jalan Lintas Selatan Lot 1A STA 4+550. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
One of the areas vulnerable to earthquakes is the southern coast of Java, including Tulungagung Regency which is located on an active subduction line. In this area, the government built the National Strategic Project of Jalan Lintas Selatan (JLS), one of which is the JLS Lot 1A segment. The soil investigation at STA 4+550 showed the dominance of soft soil, which has a low bearing capacity and is prone to deformation. Given the risk of slope instability, the soil nailing method was used as a reinforcement solution. This study aims to evaluate the safety level of slope stability reinforced with soil nailing by considering variations in earthquake loads. Simulations were conducted by applying three different Peak Ground Acceleration (PGA) values, namely 0.3g; 0.4g; and 0.5g. The main objective of this research is to produce a soil nailing planning design that can withstand various earthquake intensities on slope stability. The analysis shows that the existing slope with soil nailing reinforcement has a factor of safety (SF) of 1.782 based on manual calculation and 1.506 according to Plaxis simulation results, both values meet the requirements of SNI 8460:2017 which requires SF > 1.5. The soil nailing design used has parameters of 6 meters in length, 10° tilt angle, 32 mm nail diameter, and 1.5 meters distance between horizontal and vertical nails. This design proved capable of withstanding earthquake loads with ground accelerations of 0.3g and 0.4g, with SF values of 1.467 and 1.156, respectively, which also met the SNI requirements for pseudostatic analysis (SF > 1.1). However, for a larger earthquake load of 0.5g, it was necessary to adjust the soil nailing design with new parameters of 8 meters nail length, 10° angle, 43 mm nail diameter, and 1 meter nail spacing, which resulted in an SF value of 1.347. These results indicate that the existing soil nailing design is reliable enough to resist earthquakes up to 0.4g, while the 0.5g earthquake condition requires additional structural capacity through changes in nail bar dimensions and configuration
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TE Highway engineering. Roads and pavements |
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| Divisions: | Faculty of Engineering > Departement of Civil Engineering | ||||||||||||
| Depositing User: | ANI SEFRINA | ||||||||||||
| Date Deposited: | 20 Jun 2025 04:03 | ||||||||||||
| Last Modified: | 20 Jun 2025 04:03 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/38736 |
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