STUDI METODE PERKUATAN LERENG MENGGUNAKAN GEOMAT, SHOTCRETE, DAN SOIL NAILING (Studi Kasus: Lereng Spillway Bendungan Sadarwana Paket II Subang)

Authors

  • Sahal Priyono Putra Universitas Islam Sultan Agung
  • Abdul Rochim Universitas Islam Sultan Agung
  • Sumirin Sumirin Universitas Islam Sultan Agung

DOI:

https://doi.org/10.32497/wahanats.v28i1.4562

Keywords:

landslide, slope, reinforcement, safety factor

Abstract

The landslide of the upper slope in the excavation work of the spillway Sadawarna
Dam Package II Subang occurred after rain, precisely at the STA location from
0+500 to 0+520. The purpose of the study was to compare soil reinforcement on the
previous spillway slope using geomat and shotcrete with soil reinforcement using
soil nailing. Based on soil data the spillway slope consists of two types of slopes, the
upper slope consists of CL (BS:03) while the lower consists of ML (BS:04). The
shear strength parameters C and Phi of both slope soils are quite high. Using Plaxis
V.21, Slope/W and Seep/W, with C and Phi the slopes were found to be stable.
However, in reality there was a landslide on the upper slope. Therefore, back
analysis was performed by lowering the strength parameters of the top soil adjacent
to the slope until the landslide was realized. The reinforcement used on the two
slopes was different, the upper slope used geomat while the lower slope used
shotcrete, then the geomat was changed to soil nailing. Two seasonal models were
applied to all reinforcements. The results showed that the factor of safety values
from the back analysis modeling in the wet season using geomat and shotcrete were
less than 1 (Unstable). However, reinforcement using soil nailing has a Safety
Factor higher than 1.5. Based on these results, soil nailing can be a solution to
minimize landslides on the spillway slope.

Author Biographies

Sahal Priyono Putra, Universitas Islam Sultan Agung

Magister Teknik Sipil, Universitas Islam Sultan Agung

Abdul Rochim, Universitas Islam Sultan Agung

Teknik Sipil, Fakultas Teknik, Universitas Islam Sultan Agung

Sumirin Sumirin, Universitas Islam Sultan Agung

Teknik Sipil, Fakultas Teknik, Universitas Islam Sultan Agung

References

Ardiansyah, R.H., Sobriyah, & Wahyudi, A.H., 2014, Pengaruh Fluktuasi Muka Air Waduk Terhadap Debit Rembesan Menggunakan Model Seep/W (Studi Kasus di Bendungan Benel, Kabupaten Jembrana, Bali). Jurnal Matriks Teknik Sipil, September, 471”“476

Atikah, D., Juwono, P.T., & Hendrawan, A.P., 2017, Pengaruh Hujan Pada Stabilitas Lereng Di Jalan Tol Gempol ”“ Pandaan. Jurnal Tenik Pengairan, 008 (01), 79”“88

Fauzi, I.M., & Hamdhan, I.N., 2019, Analisis Stabilitas Lereng Dengan Perkuatan Geotekstil Woven Akibat Pengaruh Termal Menggunakan Metode Elemen Hingga. RekaRacana: Jurnal Teknil Sipil, 5 (2), 61”“72

Hermawan, R.B., Surjandari, N.S., & Dananjaya, R.H., 2017, Analisis Stabilitas Lereng Dengan Perkuatan Soil Nailing Menggunakan Program Komputer (Studi Kasus: Desa Tambakmerang, Kecamatan Girimarto, Kabupaten Wonogiri). E-Jurnal MATRIKS TEKNIK SIPIL, 395”“401

Pratama, R.B., Muhibbi, I.M., A,I.D., & Hardiyati, S., 2014, Analisis Stabilitas Lereng Dan Alternatif Penanganannya (Studi Kasus Longsoran Jalan Alternatif Tawangmangu STA. 3+150 s/d STA. 3+200, Karanganyar). Jurnal Karya Teknik Sipil, 3 (3), 573”“585

Sinarta, I.N., 2016, Tegangan Pori Negatif Sebagai Parameter Stabilitas Lereng Tanah Tak Jenuh (Soil Mechanics On Unsaturated Soil). Paduraksa, 5 (1), 31”“42

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Published

2023-06-01