DESIGN AND PRELIMINARY STUDY OF SUBSURFACE DRAINAGE IN HAMBALANG COMPLEX BOGOR
DOI:
https://doi.org/10.32679/jth.v7i1.557Kata Kunci:
Landslide, precipitation, infiltration, subsurface drainageAbstrak
The “Pusat Pendidikan Pelatihan dan Sekolah Olah Raga Nasional (P3SON)” construction project was conducted at Hambalang, Sentul, Bogor, West Java. The project area covers 32 hektares. The P3SON project is located at a small mountain, called Gunung Hambalang, which has steep slope and thick clay layer. Generally, Hambalang morphology has a slope of about 10–45°, and at some places the buildings are built on steep slopes with the degree of steepness more than 45°. Based on to the bore log, the rock profile is silt rock with the deepness of 0-6 m, and under 6 m, there is a hard clay layer. Clay layer if it is in contact with water will become impermeable and thus swell. During the high intensity rainfall event, the landslide risk is high. In order to strengthen the slope stability, an outer subsurface drainage at the East side and also horizontal subsurface drainage system in the area itself are proposed. The twin iron pipes are designed for the East side drainage system with the diameter of 20-35 cm and laid 5 m under the surface elevation. Technically, there are fifteen locations that need horizontal drainage installation. Horizontal drainage pipes are designed with 10 cm diameter and 8 m interval between pipes. The length of the horizontal drainage pipes is 15-20 m with slope of 10°. Due to the fact that the silt layer depth is 0-6 m, then the horizontal drainage pipes will be located in 3-5 m depth from the surface. Optimistically, this system will reduce the landslide risk in Hambalang area.
Referensi
BAKN DPR RI. 2012. Laporan Hasil Penelaahan Badan Akuntabilitas Keuangan Negara DPR RI Terhadap Laporan Hasil Pemeriksaan Investigatif (Tahap I) BPK-RI atas Pembangunan Pusat Pendidikan Dan Sekolah Olahraga Nasional pada Kementerian Pemuda dan Olahraga di Jakarta dan Bogor. Jakarta, November 2012.
Broto, G. S. D. 2016. Siaran Pers No. 15/Kom-Publik/Kemenpora/3/2016: Pertemuan Tim Pemerintah Dengan KPK Soal Hambalang, Senin, 28 Maret 2016, http://www.kemenpora.go.id/index/preview/konferensi/208, diakses pada: 11 Mei 2016.
Chow, V. T., Maidment, D. R. & Mays, L. W. 1988. Applied Hydrology, New York: Mc Graw-Hill. ISBN 0-07-0108102
Cook D. I., Santi P.M., Higgins J.D. 2001. Horizontal Landslide Drain Design: State of the Art and Suggested Improvements, Department of Geology and Geological Engineering, Colorado School of Mines.
Darcy, H. 1856. Les Fontaines Publiques de la Ville de Dijon. Dalmont, Paris.
Forrester K. 2001. Subsurface drainage for slope stabilization. ASCE Press, 222pp. ISBN: 9780784473801.
Greg M., Pohll G. M., Carroll R. W. H., dan Reeves D. M. 2013. Design Guidelines for Horizontal Drains used for Slope Stabilization. Washington: Washington State Department of Transportation.
Hardiyatmo C. H. 2012. Tanah Longsor dan erosi: Kejadian dan Penanganan. Yogyakarta: Gajah Mada University Press.
Kalsim D. K. 2012. Teknik Drainase Bawah Permukaan untuk Pengembangan Lahan Pertanian. IPB, Bogor.
Kopecky M., Ondrasik M., dan Antolova D. 2013. Horizontal Drains as Effective Measure for Landslide Remediation, Studio Geotechnica et Mechanica. Vol. XXXV, No.1.
KSO Adhi-Wika. 2012. Konsep Penanggulangan Longsoran dan Perbaikan Lereng Pusat Pendidikan dan Pelatihan Atlet Bogor. Jakarta: Laporan Kegiatan KSO Adhi Karya-Wijaya Karya.
Lin D. G., Hung S. H., Ku C. Y., dan Chan H. C. 2016. Evaluating the Efficiency of Subsurface Drainages for Li-Shan Landslide in Taiwan. Natural Hazards Earth System Science.
Locat J., Perret D., dan Turmel D. 2008. Embankment Slope Stabilisation Using Subhorizontal Drains at Highway 39 Near Drayton Valley Alberta. Proceedings of the 4th Canadian Conference on Geohazards.
Luthfi, A., Tobing, dan Tigor. 1995. Peta Geologi Lembar Bogor - Jawa, skala 1 : 100.000. Bandung: P3G.
Pathmanathan. 2013. Numerical Simulation of the Performance of Horisontal Drainage, A thesis Master of Science in Civil Engineering, Department of Civil and Environmental Engineering, washinton State University
Pohll G. M., Carroll R. W. H., Reeves D. M., Parashar R., Muhunthan B., Thiyagarjah S., Badger T., Lowell S., dan Willoughby K. A. 2013. Design guidlines for horizontal drains used for slope stabilization, WSDOT research report. Washington State Department of Transportation.
Pusat Penelitian dan Pengembangan Geologi. 1991. Peta Zona Kerentanan Gerakan Tanah Lembar Bogor. Bandung: P3G.
Puslitbang SDA. 2008. Penelitian pengendali daya rusak air. No. IP 0101/05/La-HITA/2008.
Rahardjo H., Hritzuk K. J., Leong E. C., dan Rezaur R. B. 2003. Effectiveness of Horizontal Drains for Slope Stability. Science Direct: Engineering Geology 69 (295-308).
Santi P.M., Elifrits C.D. 2001. Landslide Stabilization Using Wick Drains, University of Missouri-Rolla
SNI 03-1962-1990. 1990. Tata Cara Perencanaan Penanggulangan Gerakan Tanah. Jakarta: Badan Standarisasi Nasional (BSN).
Soewarno. 2015. Klimatologi: Pengukuran dan Pengolahan Data Curah Hujan. Yogyakarta: Graha Ilmu.
United States Department of Agriculture, Soil Conservation Service (USDA-SCS). 1972. National Engineering Handbook. Section 4, Hydrology.
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