Korelasi Air Entry Value (AEV) Dengan Kuat Geser Tanah Jenuh Sebagian

Gayuh Aji Prasetyaningtiyas; Kuswaji Dwi Priyono

doi:10.30630/jirs.v19i2.892

Gayuh Aji Prasetyaningtiyas Universitas Muhammadiyah Surakarta https://orcid.org/0000-0002-8547-9510
Kuswaji Dwi Priyono Universitas Muhammadiyah Surakarta

DOI: https://doi.org/10.30630/jirs.v19i2.892

Keywords: AEV, Fredlund Bimodal, kuat geser, SWCC, kuat geser, Van Genutchen.

Abstract

The characteristics of unsaturated soil seen from the Groundwater Characteristics Curve (SWCC). One of main variables determine the SWCC of soil are Air Entry Value (AEV). The AEV is the initial point of air entering the soil void. SWCC was obtained from the fitting of unsaturated soil model from Soil Vision. Although statistically a fitting model can match the point of laboratory result, the AEV resulted different point from the curve shaped by laboratory points. Therefore, this study aims to understand further the influence of AEV on unsaturated particularly on the change of soil share strength parameters. This studi used field investigation, a series of laboratory and numerical analysis to obtain Fredlund bimodal and Van Genutchen fitting model. Both models, then used to calculate the shear strength parameter (φ’, c’) change affected by different water content. On the other hand, the AEV consider as the major aspect on the calculation. The result shows that Van Genutchen model demonstrated the higher similarity with the laboratory test shear strength test comparing to Fredlund Bmodal’s. for silt sand oil in this study. This study is applicable for back filled and landslide case.

Author Biography

Gayuh Aji Prasetyaningtiyas, Universitas Muhammadiyah Surakarta

gayuh

References

Cao, J., Jung, J., Song, X., & Bate, B. 2018. On The Soil Water Characteristic Curves Of Poorly Graded Granular

Materials In Aqueous Polymer Solutions. Acta Geotechnica, 13(1), 103-116.

Zhou, Z.-q., Ranjith, P. G., & Li, S.-c. 2016. Optimal Model For Particle Size Distribution Of Granular Soil. Proceedings of the Institution of Civil EngineersGeotechnical Engineering, 169(1), 73-82.

Burger, C. A., & Shackelford, C. D. 2001. Evaluating dual porosity of pelletized diatomaceous earth using bimodal soilwater characteristic curve functions. Canadian geotechnical journal, 38(1), 53-66.

Fondjo, A. A., Theron, E., & Ray, R. P. 2021. Investigation of the Influencing Soil Parameters on the Air Entry Values in SoilWater Characteristic Curve of Compacted Heaving Soils. Architecture, 9(1), 91-114.

Fredlund, M. D. 2000. The Role Of Unsaturated Soil Property Functions In The Practice Of Unsaturated Soil

Mechanics. Thesis of PhD Degree.Saskatchewan: University of Saskatchewan.

Van Genuchten, M. T. 1980. A closed‐form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Science Society of America Journal, 44(5), 892-898.

Bishop, A. W. 1966. The strength of soils as engineering materials. Géotechnique, 16(2), 91-130.

Zhao, H., Zhang, L. M., & Fredlund, D. 2013. Bimodal shear-strength behavior of unsaturated coarse-grained soils. Journal of Geotechnical and Geoenvironmental Engineering, 139(12), 2070-2081.

Dias, A. S. R. A. 2019. The effect of vegetation on slope stability of shallow pyroclastic soil covers. Université

Montpellier: Università degli studi di Napoli Federico II

Laboratory, U.D.S. 2015. Laporan Pnyelidikan Tanah Pada Penanganan Longsoran Banjarnegara-Wanayasa.

Universitas Diponegoro: Semarang.

Bishop, A. W., & Blight, G. 1963. Some aspects of effective stress in saturated and partly saturated soils. Géotechnique, 13(3), 177-197.

NASA. 2022. Earth Data (Data hujan TRMM). Update terakhir:2021. Tersedia di: giovanni.gsfc.nasa.gov. [diakses: 23 September 2022, pukul 13.00 WIB].

Li, X., Li, J. H., & Zhang, L. M. 2014. Predicting Bimodal Soil–Water Characteristic Curves And Permeability

Functions Using Physically Based Parameters. Computers and Geotechnics, 57, 85-96.

ASTM. 2002. Standard Test Method For Specific Gravity Of Soil Solids by Water Picnometer, (ASTM D 854 – 02). In. West Conshohocken: American Society for Testing and Materials (ASTM).

ASTM. 2016. Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass, (ASTMD D2216). In. West Conshohocken: American Society for Testing and Materials (ASTM).

ASTM. 2003. Standard practice for laboratory compaction characteristics of soil using standard effort (12 400 ft-lbf/ft3 (600 kN-m/m3)) ASTM D 854 – 02. In. West Conshohocken: American Society for Testing and Materials (ASTM.

ASTM. 1998. Standard Test Method for Direct Shear Test of Soil under Consolidated Drained Conditions, (ASTM)

D3080). In. West Conshohocken:

American Society for Testing and

Materials (ASTM)