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Resistivity Measurement of Field and Laboratory for Layered Soils
( Haryati Awang ),( Nor Hayati A. Hamid ),( M. Idris Ali ),( Noram I Ramli ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
This study is about characterising the properties and types of multilayered soil profile. The purpose is to compare between the resistivity value obtain from field and laboratory tests. The field measurement was carried out on the surface of an excavated ground. The laboratory test was conducted on the material collected from each layer of the subsurface. The results of this study showed that both profiles from resistivity images and actual profiles are matched to each other when overlaid. The resistivity images showed three (3) different resstivity layers indicated by three main resistivity values. The top, midle and bottom layers of the sub surface were characterised as a compacted filled soil of brownish and redish in colour with the thickness of 0.9m, dark brown of 0.3m thick and dark bluish gray soil of 1.1m thick accordingly. The soil of layer 1 (top), layer 2(midle) and layer 3 (bottom) were classified correspondingly as CLAY of Intermediate Plasticity, as SILT of High Plasticity and as CLAY of Intermediate Plasticity. In comparison to the resistivity value between field and laboratory, layer 1, layer 2 and layer 3 of actual profile are ranged from 40 ohm.m to 150 ohm.m, 10 ohm.m to 35 ohm.m, and 0 ohm.m to 9 ohm.m. In parallel to the field resistivity value, the soil material namely as geo-resistivity index of samples of each layer are in the range of 45 ohm-m to 55 ohm-m, 9 ohm-m to 14 ohm-m and 4.5 ohm-m to 9.6 ohm-m.
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