The suitability evaluation of dredged soil from reservoirs as embankment material.
We assessed the suitability of soil dredged from reservoirs as embankment material and investigated its physical and geochemical properties and strength parameters, as well as its environmental stability. The dredged soil samples were taken from the Ansung, Jechon, and Mulwang Reservoirs in Korea. To evaluate their environmental stability and geochemical properties, we examined their levels of heavy metal contamination, pH, and electrical conductivity. We also conducted X-ray fluorescence and X-ray diffraction analyses. Furthermore, we determined the geotechnical characteristics, such as the compaction characteristics, and permeability coefficient, and we performed consolidated undrained triaxial compression tests to evaluate the recycling potential of dredged soil as embankment material. The concentrations of heavy metals in the sediment samples were lower than those of the standard samples. The pH value of the soil samples ranged from 4.25 to 5.39, and the electrical conductivity ranged between 83.3 and 265.0 μS/cm, indicating suitability for use as construction material with steel and concrete. Based on the values of the mechanical properties of the dredged soil, analysis of slope stability was performed for various cases and water level conditions. Our results indicate that the dredged soil has sufficient stability for substitution of embankment material and also as new embankment material for expansion.
Department of Rural Systems Engineering, Seoul National University, Seoul, South Korea.
Jaesung
J
Park
Department of Rural Systems Engineering, Seoul National University, Seoul, South Korea; Research Institute for Agriculture & Life Sciences, Seoul National University, Seoul, South Korea. Electronic address: syh86@snu.ac.kr.
Younghwan
Y
Son
Civil Design Team, Daelim Industrial Co., Ltd., Seoul, South Korea.
Sookack
S
Noh
Civil and Construction Engineering, Oregon State University, Corvallis, USA.
Taeho
T
Bong
D003252:Construction Materials; D004785:Environmental Pollutants / Q000032:analysis; D019015:Geologic Sediments / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000032:analysis; D059027:Recycling; D056910:Republic of Korea; D012987:Soil / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission; D014961:X-Ray Diffraction
D004785:Environmental Pollutants; D019216:Metals, Heavy; D012987:Soil
Dredged soil; Embankment; Heavy metal; Recycling material; Reservoir