Analisis Pengaruh Infiltrasi Hujan Terhadap Stabilitas Lereng STA 62+450 S/D 62+825 Jalan Tol Seksi Sp. Indralaya – Prabumulih Dengan Software Geo Studio
DOI:
https://doi.org/10.30737/jurmateks.v7i2.6330Keywords:
Hydroseeding, Slope, GEO STUDIO, Rain Infiltration, ain Infiltration, Retaining WallAbstract
The construction of the Indralaya-Muara Enim Interchange Toll Road, especially the Indralaya-Prabumulih Interchange Section, was hampered by landslides after excavation was carried out between STA 62+450 to 62+825. The combination of steep slopes and rain infiltration weakened the soil structure, increasing the risk of landslidesThis research aims to analyze the effect of rainwater infiltration on slope stability on the Sp Section Toll Road Project. Indralaya–Prabumulih. The research methodology used was to analyze landslide slope areas using the Slope/W and Seep/W programs from Geo Studio. This study evaluated different excavation heights and an initial excavation slope of 1:3. The focus is on calculating the safety factor (SF) at varying rain durations (1 hour, 3 hours, and 5 hours), with SF values below 1.5 indicating instability. The Safety Factor (SF) value of the existing soil before excavation was 1.58, but after 1 hour of rain, the SF decreased to 1.33 (15.66% decrease). After 3 hours, SF dropped to 1.13 (28.34% decrease), and reached 1.10 (30.24% decrease) after 5 hours. Strengthening slopes using the Hydroseeding method increases SF to 1.83, while the use of Retaining Wall increases SF more significantly to 2.54. This research reveals the impact of rain infiltration on soil stability and proves the effectiveness of slope strengthening methods. These results are an important basis for planning effective landslide mitigation on toll road excavations.
References
Peraturan Presiden Republik Indonesia Nomor 42 Tahun 2024 Tentang Perubahan Ketiga Atas Peraturan Presiden Nomor 100 Tahun 2014 Tentang Percepatan Pembangunan Jalan Tol di Sumatera.
E. Gartung, “Excavation in Hard Clays of the Keuper Formation,” Proceeding of Symposium, Geotechnical Engineering Division, Seattle, Washington, 1986.
R. Oktaviani, P. Raharjo, I. Sadisun, “Kajian Ketahanan Batuan Clay Shale Formasi Jatiluhur di Sentul City Jawa Barat (Study of Durability Clay Shale Jatiluhur Formation at Sentul City West Java),” Promine Journal, Vol. 6, No. 1, pp. 26-32, 2018.
C. Moses, R. Williams, ” Weathering and durability of the Goldsworthy Chalk Stones, South Downs, West Sussex, England,” Environ Geol, Vol. 56, pp. 495–506, 2008.
H. Rahardjo, V. A. Santoso, E. C. Leong, Y. S. Ng, C. J. Hua, “Numerical analyses and monitoring performance of residual soil slopes,” Soils Found, Vol. 51, No. 3, pp. 471–482, 2011.
B. D. Collins, D. Znidarcic, “Stability analyses of rainfall induced landslides. J. Geotech. Geoenviron,” Eng, Vol. 130, No. 4, pp. 362–372, 2004.
Y. Kim, S. Jeong, J. Kim, “Coupled infiltration model of unsaturated porous media for steady rainfall,” Soils Found, Vol. 56, No. 6, pp. 1071–1081, 2016.
R. Orense, K. Farooq, I. Towhata, “Deformation behavior of sandy slopes during rainwater infiltration,” Soils Found, Vol. 44, No. 2, pp. 15–30, 2004.
S. M. Springman, A. Thielen, P. Kienzler, S. Friedel, “ A long-term field study for the investigation of rainfall-induced landslides,” Ge´otechnique, Vol. 63, No.14, pp. 1177–1193, 2013.
S. Ma, M. Ma, Z. Huang, Y. Hu, Y. Shao, “Research on the improvement of rainfall infiltration behavior of expansive soil slope by the protection of polymer waterproof coating,” Soils and Foundations, Vol. 63, No. 3, 2023
A. Satyanaga, H. Rahardjo,”Role of unsaturated soil properties in the development of slope susceptibility map,” Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, Vol. 175, No. 3, pp. 276-288, 2022.
C. Gallage, T. Abeykoon, T. Uchimura, “Instrumented model slopes to investigate the effects of slope inclination on rainfall-induced landslides,” Soils Found, Vol. 61, No.1, pp. 160–174, 2021.
R. Kitamura, K. Sako, “ Contribution of ‘‘Soils and Foundations” to studies on rainfall-induced slope failure,” Soils Found, Vol. 50, No. 6, pp. 955–964, 2010.
M. Sawada, M. Mimura, “Geotechnical approaches for preservation of openly exhibited Geo-relics damaged by rainfall infiltration,” Soils Found, Vol. 62, No. 1, 2022
F. Valladares, D. Tena, S. Matesanz, E. Bochet, L. Balaguer, M. Costa-Tenorio, J. Tormo, P. Garcia-Fayos, “Functional traits and phylogeny: what is the main ecological process determining species assemblage in roadside plant communities?,” Journal of Vegetation Sciences, Vol. 19, pp. 381-392. Madrid, 2008.
D. Alifragkis, M. Vavelidis, B. Gazea, E. Voulgaridou, A. Galatsianou, E. Daftsis, “ New Approaches To The Revegetation And Reclamation Of Old Tailing Management Facilities: The Example Of The Cassandra Mines Bulletin of the Geological Society of Greece,” Bulletin of the Geological Society of Greece, Vol. 50, No. 4, pp. 2283, 2016.
J. W. Wagenbrenner, L. H. MacDonald, D. Rough, “Effectiveness of three post-fire rehabilitation treatments in the Colorado Front Range,” Hydrological Processes, Vol. 20, pp. 2989–3006, 2006.
R. Sharma, S. Bhardwaj, 2017, ”Effect of Mulching on Soil and Water Conservation-A Review,” Agricultural Reviews, Vol. 38, No. 4, pp. 311–315, 2017.
A. Sunandar, I. Andika, “Penerapan Teknologi Hydroseeding Dikombinasi Dengan Matras Organik Di Lereng Jalan Bebas Hambatan Manado-Bitung,” Jurnal HPJI, Vol. 6, No. 2, pp. 105-118, 2020.
Hardiyatmo, C. Hary , “Mekanika Tanah II Edisi ke tiga.” Yogyakarta: Gadjah Mada University Press, 2022.
R. Hidayat, “Analisis Pengaruh Infiltrasi Hujan Terhadap Stabilitas Lereng Di Pangkalan, Sumatera Barat,” Jurnal Teknik Hidraulik, Vol. 10, No. 1, pp 25-36, 2020.
M. Irsyam, A. Himawan, E. Susila E., “Bored Pile Solution for Embankment Failure on Clay Shale: Design and Analyses of Static and Earthquake Conditions of the KM 97+500 Cipularang Toll Road in Indonesia,” 17 SEAGC, pp. 109-112, Taipei, Taiwan, 2010.
Y. Li, A. Satyanaga, H. Rahardjo, “Characteristics of unsaturated soil slope covered with capillary barrier system and deep-rooted grass under different rainfall patterns,” International Soil and Water Conservation Research, Vol. 9, No. 3, pp. 405-418, 2021.
J. Okovido, E. Obroku, “Evaluation of Four SWCCs Models' Flexibility for Selected Reconstituted Tropical Red Earth Soils,” The International Journal of Engineering and Science (IJES), Vol. 10, No. 4, pp. 18-26, 2021.
, [26]M. T. Van Genuchten, “A close form equation predicting the hydraulic conductivity of unsaturated soil,” Soil Sci Soc Am J , Vol. 44, pp. 892–8, 1980.
R. F. Carsel, R. S. Parrish, “Developing Joint Probability Distributions of Soil Water Retention Characteristics,” Water Resources Research, Vol. 24, No. 5, pp. 755-769, 1998.
K. Huang, B. P. Mohanty, M. Th. van Genuchten, “Anew convergence criterion for the modified Picaed iteration method to solve the variably saturated flow equation,” Journal of Hydrology, Vol 178, pp. 69-91, 1996.
T. Stark, J. Duncan, “Mechanisms of strength loss in stiff clays,” Journal of Geotechnical Engineering, Vol. 117, No. 1, pp. 139-154, 1991.
A. W. Skempton, “Slope Stability of Cuttings in Brown Clay,” Tokyo, 1997.
S. S. Sandroni, “The Strength of London Clay in Total and Effective Stress Term,” Ph.D. Thesis, University of London, 1997.
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