مطالعه ژيوتكنيكي رسوبات كف درياچه ي اروميه

GEOTECHNICAL STUDIES OF ORUMIEH LAKE BED SEDIMENTS

Geotechnical investigations have been carried out on bed sediments of many brine lakes such as Great Salt Lake in the United State and Dead Sea in the north of Africa. Orumieh Lake is one of the brine lake which is located in the north west of Iran. In literature there is no significant geotechnical information on very soft, unconsolidated of this lake bed sediments. This paper presents the study performed on lake bed sediments along the Tabriz-Orumieh highway path. Subsurface investigation was performed . The program included drilled boreholes to obtain soil profiles, insitu and laboratory tests to determine the geotechnical behaviour of the lake bed sediments up to the required depth. Physical properties, compressive strength, shear strength, consolication characteristics and sensitivity of the soil lyers were determined. Finally correlations between the above parameters were analysed. The results of this analysis are significant in providing a quantitative estimate of deformation characteristics of thick, very soft unconsolidated soil sediments for design purposes in lake environment.