Abstract: In recent years, with the rapid development of economy and engineering technology, the number of highway transportation projects such as bridges on the soft soils has increased dramatically. The requirements for the soft soil treatment have also become more restrictive. In view of the particularity of the lacustrine soft soils and the demands from engineering projects, a series of geotechnical investigations were conducted on the lacustrine soft soils through the on-site soil testing, including density, moisture content, specific gravity, Atterberg Limits and permeability tests. The experimental results show that the Poyang Lake soft soil is a typical lacustrine soft soil. There exists a deep silty soil in this area, which has the characteristics of the large water content, low strength and poor permeability. The study results will be used for the future treatment of the Poyang Lake soft soils and for the value of the engineering parameters. Finally, the correlations among the physical properties of the silty soil in the Poyang Lake area are analyzed. 

Key words: Lacustrine Soft Soil, Poyang Lake Area, Physical Properties of Soil, Correlation Analysis