A landslide occurred on National Road Section Bts. Pidie/Aceh Besar - Bts. Kota Sigli Sta. 0+500 during the peak of the rainy season has resulted in the disruption of traffic lanes. Soil samples were obtained from the landslide site for inclusion in the testing process. The laboratory tests encompass a range of physical and mechanical parameters and also dry-wetting procedures. The result shows that the topsoil layer consists of sandy silty clay with medium plasticity. Then, a dry-wetting cycle was conducted to simulate the dry and rainy season by introducing and reducing water content from the initial condition (wi) to saturated (wsat) and to airdried (wairdry) with 25%, 50%, 75%, and 100% interval. The results showed a decrease in unconfined compressive strength (qu) by 22.70% and negative pore water pressure (-Uw) by 53.14%. Slope stability analysis found that the slope was stable after the landslide with an FS value of 1.380 and increased to 1.410 when there was the addition of slab on pile road construction. The addition of rainfall variations for 3 and 5 hours is insignificant to the stability of the slope due to the groundwater table being too deep to affect pore water pressure.

Ariesnawan, R. A. (2015). Karakteristik Mekanis dan Dinamik Clay Shale Kabupaten Tuban Terhadap Perubahan Kadar Air. Master Thesis. Program Pasca Sarjana, Teknik Sipil ITS.

Hu, D., Kato, S., & Kim, B. (2024). “Evaluation of Infinite Slope Stability with Various Soil Under Wet-Drying Cycle”. International Journal of GEOMATE, 26(115), 89-99. doi:10.21660/2024.115.g13306.

Jing, J., Jingming, H., Wen, S., Guangzhao, C., Yue, M. & Guoqiang, J. (2022). “Study on Influencing Factors of Unsaturated Loess Slope Stability under Dry-Wet Cycle Conditions”. Journal of Hydrology.

Khan, s., Ivoke, J. & Nobahar, M. (2019, August 3). “Coupled Effect of Wer-Dry Cycles and Rainfall on Highway Slope Made of Yazoo Clay”. Geosciences 9, 341.

Muntaha, M., Soemitro, A. R. & Warnana, D. D. (2016). “The static and dynamic characteristic of undisturbed residual soils under drying-wetting cycle’s”. The 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering (pp. Volume 2 Issue 15 Pages 591-594).

Rangkuti, R. (2024). Stabilisasi Tanah Dasar Dengan Kapur Ca(oh)2 untuk Memperbaiki Sifat Fisis Dan Mekanis Tanah Sebagai Bahan Timbunan (Studi Kasus :Ruas Jalan Trengguli – Bts. Kab. Demak/Kudus). Master Thesis. Program Pasca Sarjana, Teknik Sipil ITS.

Saleh, M. (2023). Analisa Stabilitas Lereng Ditinjau Dari Aspek Pembasahan- Pengeringan Dan Infiltrasi Air Hujan Tanah Lempung Khas Bobonaro. Master Thesis. Program Pasca Sarjana, Teknik Sipil ITS.

Satker P2JN Provinsi Aceh. (2023). Laporan Kejadian Longsor pada Ruas Jalan Lambaro – Batas Pidie (N.002) Sta 59+750 dan Ruas Batas Pidie/Aceh Besar – Bts. Kota Sigli (N.003) Sta 00+900 s.d Sta 01+050 Provinsi Aceh. Laporan Akhir. Satker P2JN Provinsi Aceh.

Satria, T. R. (2018). Study on Change of Soil Properties During Dry and Rainy Seasons for Stability Analysis of Bengawan Solo River Embankment. Doctoral Dissertation. Institut Teknologi Sepuluh November.

Soemitro, R. A. & Warnana, D. D. (2020). Karakteristik Tanah Tidak Jenuh. ITB Press. Surabaya.