Analisis Stabilitas Lereng dengan Metode Bored Pile untuk Penanganan Tanah Longsor pada Ruas Jalan Muara Teweh – Jalan Pasar Punjung Sta 29+400

Stephanus Alexsander; Fatma Sarie; Mohammad Ikhwan Yani; Nomeritae; Edsel Kennardo

Authors

Stephanus Alexsander Universitas Palangka Raya Author
Fatma Sarie Universitas Palangka Raya Author
Mohammad Ikhwan Yani Universitas Palangka Raya Author
Nomeritae Universitas Palangka Raya Author
Edsel Kennardo Universitas Palangka Raya Author

Keywords:

Longsor, Metode Elemen Hingga, Bored Pile, Faktor Keamanan (SF)

Abstract

This study analyzed the slope stability of Muara Teweh road section - Jalan Pasar Punjung STA 29+400. A landslide occurred on the left side of the road with a height of 15 m and a length of 50 m. The analysis was performed using the finite element method with Plaxis 2d program to obtain a safety factor (SF) value based on secondary data from field and laboratory tests, after which the bored pile was designed and then reanalyzed to obtain the SF value. The initial SF of 1.847 was not consistent with field conditions (SF < 1.07), so a back-analysis was performed, resulting in an SF of 1.044. To prove that the analysis was correct, a comparison with Bishop's Limit Equilibrium Method was performed, yielding an SF = 1.000, so the value is correct. The design of the bored pile is planned with two vertical piles per point, each with a diameter of 0.5 m, length of 5 m, and spacing of 1 m along 50 m. For the size and number of reinforcements, 4D16 longitudinal bars and Ø10 - 100 mm stirrups were used. After stabilization, the SF increased to 1.260, meeting the minimum SF > 1.25, which indicates it is considered safe.

References

[1] D. Noor, "Geologi lingkungan," Yogyakarta Graha Ilmu, 2006.

[2] Mawardi and A. D. Setiawan, "Analisis Stabilitas Lereng Terasering Buatan Dengan Metode Fenite Elemen," vol. 16, pp. 39-50, 2022.

[3] Pangemanan, Violetta Gabriella Margaretha, A. E. Turangan, and O. B. A. Sompie. "Analisis kestabilan lereng Dengan metode Fellenius." Jurnal Sipil Statik 2.1 (2014): 37-46.

[4] Jawat, I. Wayan, Putu Panji Tresna Gita, and I. Made Satria Dharmayoga. "Kajian Metoda Pelaksanaan Pekerjaan Pondasi Bored Pile Pada Tahap Perencanaan Pelaksanaan." Paduraksa: Jurnal Teknik Sipil Universitas Warmadewa 9.2 (2020): 126-142.

[5] I. K. P. Umum, Peraturan Menteri Pekerjaan Umum dan Perumahan Rakyat Nomor 13 Tahun 2024 tentang Kelas Jalan Berdasarkan Penggunaan Jalan Serta Kelancaran Lalu Lintas dan Angkutan Jalan, Jakarta: Kementerian Pekerjaan Umum, 2024.

[6] Mina, Enden, and Rama Indera Kusuma. "Analisa Stabilitas Lereng dan Perencanaan Soil Nailing dengan Software GeoStudios 2007 (Sudi Kasus Kampus Untirta Sindang Sari)." Fondasi Jurnal Teknik Sipil 4.1 (2015): 1-11.

[7] J. E. Bowles, Sifat-sifat Fisis Dan Geoteknis Tanah: (mekanika Tanah), Jakarta: Erlangga, 1991.

[8] Ardhi, Hafidh A., et al. "Perbandingan analisis stabilitas lereng metode kesetimbangan batas dengan metode elemen hingga menggunakan pendekatan probabilistik." Proceeding Seminar Nasional Geomekanika IV. 2017

[9] A. I. Mahmud, L. B. Said dan A. Alifuddin, “Pemodelan Bidang Gelincir Tanah Menggunakan Plaxis 2D pada Penanganan Pascabencana Ruas Salaonro-Pompanua Kabupaten Soppeng,” Journal FLYOVER (JFO), vol. 02, no. 02, pp. 76-85, 2022.

[10] M. R. Fadilla and M. Zaki, "Analisis Stabilitas Lereng Dan Longsor Dengan Menggunakan Bored Pile Dan Software Plaxis," pp. 191-197, 2022.

[11] SNI 2436, "Tata cara pencatatan dan identifikasi hasil pengeboran inti," 2008.

[12] SNI 4153, Cara uji penetrasi lapangan dengan SPT, 2008.

[13] ASTM D1452, Standard Practice forSoil Exploration and Sampling by Auger Borings, United States: ASTM International, 2007.

[14] ASTM D2216, Standard Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass, United States: ASTM International, 1998.

[15] ASTM D854, Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer, United States: ASTM International, 2000.

[16] ASTM D2937, Standard Test Method for Density of Soil in Place by the Drive-Cylinder Method, United States: ASTM International, 2017.

[17] ASTM D4318, Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, United States: ASTM International, 2005.

[18] ASTM D 421, Standard Practice for Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants, United States: ASTM International, 2007.

[19] SNI 3420, Metode uji kuat geser langsung tanah tidak terkonsolidasi dan tidak terdrainase, Badan Standardisasi Nasional, 2016.

[20] ASTM D2850, Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils, United States: ASTM International, 2015.