Engineering Geological Characteristics of the Residual Soil, Lower Quaternary Sediments in Kertajati Region, Majalengka, West Java
DOI:
https://doi.org/10.17014/ijog.6.3.177-189Keywords:
Lower Quaternary sedimentary rocks, residual soil, correlation, linear regressionAbstract
Only few engineering geological researches on residual soil have been conducted in Indonesia, whereas many infrastructure projects take place on undulating area and mountainous area which are composed of residual soils. The paper discusses residual soil characteristics of the Lower Quaternary sediment (Qos) in Kertajati area, Majalengka. The methodology of the research consists of engineering geological mapping, in situ test using 2.5 ton penetrometer, sampling and laboratory test for index properties, Atterberg limits, grain size analysis, and strength tests. Field test analysis data show that the thickness of residual soil resting on the basement rock in the study area varies from 2.40 - 14.20 m. Upwards, it comprises sands, silts, and clays, respectively. Laboratory analysis data indicate that the residual soil is dominated by fine-grained fraction, composed of high plastic clay (CH). Relationship among engineering geological parameters was analysed using linear regression and tested using statistic method t-test to find real correlation among variables within 95 - 90% significance level.. Based on the test, there are real positive correlation with 19 degree of freedom and 5% and 10% level of significance are found in between plasticity indexes (IP) and liquid limits (LL), between plasticity indexes (IP) and clay contents (C), between specific gravities (G ) and clay contents (C). The real negative correlation with nine degree of freedom and 5% and 10% level of significance occurs in between cohesion (c) dengan friction angle (φ). Corelation between degree of saturation (G ) and clay contents (C) with 19 degree of freedom is found in 10% level of significance.
References
Anonim a, 1998. Annual book of ASTM Standards. Section 4 Construction, vol 04.08: soil and rocks, dimension stone, geosynthetics, Philadelphia, USA.
Anonim b, 2004. Atlas curah hujan Indonesia. Badan Koordinasi Survei dan Pemetaan Nasional, dan Badan Meteorologi dan Geofisika,
Anonim c, 2004. Cone penetration testing (CPT), Fugro Engineering Services Limited, Hithercroft Road, Wallingford, Oxfordshire OX10 9RB, https://www.fes.co.uk/downloads/datasheets/cpt/Datainterpretation/CPT Handbook. pdf (diunduh 10 Nopember 2009).
Anonim d, 2005. Keputusan Menteri Perhubungan Nomor: KM 34 tahun 2005 tentang Penetapan Lokasi Bandar Udara Di Kecamatan Kertajati, Kabupaten Majalengka Provinsi Jawa Barat.
Anonim e, 2007. Peraturan Menteri Perhubungan Nomor KM 5 Tahun 2007 tentang Rencana Induk Bandar Udara di Kabupaten Majalengka Provinsi Jawa Barat.
Davis, J.C., 2002. Statistics and data analysis in geology. Ed. 3, John Wiley and Sons Inc, Singapore.
Djuri, 1995. Peta Geologi Lembar Arjawinangun, Jawa, sekala 1:100.000. Ed. 2, Pusat Penelitian dan Pegembangan Geologi, Bandung.
Hirnawan, F., 1997. Perilaku tanah ekspansif dan peningkatan parameter ketahanan oleh peran vegetasi. Buletin Geologi Tata Lingkungan, 18, h.1-11.
Holtz, R.D. dan Kovacs, W.D., 1981. An Introduction to Geochemical Engineering. Prentice Hall.
Irfan, T.Y. dan Dearman, W.R., 1978. Engineering classification and index properties of a weathered granite. Bulletin of the International Association of Engineering Geology, 17, h.79-90. DOI:10.1007/BF02634696
Setiadji, P., Sadisun, I.A., dan Bandono, 2006. Pengamatan dan pengujian lapangan dalam karakterisasi pelapukan andesit di Purwakarta. Jurnal Geoaplika, 1(1), h.003 - 013.
Tohari, A. dan Sarah. D., 2006. Assesment of the stability of steep volcanic residual soil slopes under rainfall infiltration. Media Teknik Sipil, Juli, h.95-102.
Wesley, L, D., 1973. Some basic engineering properties of halloysite and allophane clays in Java, Indonesia. Geotechnique, 23(4), h.471-494. DOI:10.1680/geot.1973.23.4.471
------------------., 2009. Fundamental of soil mechanic for sedimentary and residual soils. John Wiley and Sons, Inc, New Jersey, USA, https://books.google.co.id/books?id=(diunduh 25 November 2009).
