Test and Analysis on Soil Characteristics for the South Main Dyke of Jingjiang River

In coordination of the construction of concealed work of levee project, the research on the soil quality of Jingnan levee in Hubei province was carried out through test. The results demonstrate: ① the Jingnan levee embankment is in bad quality, the compaction degree of most levee sections doesn’t reach 92%; the average compressive coefficient of the levee backfilled soils is about 0.3 MPa; the seepage coefficients are 10\+ -5 ～10\+ -6 cm/s generally; the levee body was compacted unevenly; ② the soil layers of the levee foundation are distributed complicatedly and generally in low density; the void ratios of various soils are mostly in 0.7～1, indicating that the foundation soils are generally in loose state; ③ the pH value of levee body and foundation is 7.05～8.95, attributing to weak alkaline and not producing significant influence on liquid-plastic limit and shear strength of soils, the content of strongly soluble salt of levee foundation soils is 0.01%～0.52% and will not produce great influence on the mechanical behaviours of soils.