In order to study the sensitivity of factors which influence the stability of high liquid limit soil slope

the shear strength parameters under different water content of high liquid limit soil taken from slopes of Guang-Wu Expressway were measured by direct shear test

and strength reduction method was employed to study the sensitivity of stability of high liquid limit soil slope to the seven influencing factors including water content

slope degree

slope height and so on. The results of calculation indicate that the stability sensitivity of high liquid limit soil slope to influencing factors ranges from the large to small as follows: water content

slope degree

and slope height. The elastic modulus

poisson’s ratio

dilatancy angle

and the tensile strength have less impact on the stability of high liquid limit soil slope. When the water content comes to a certain value

the safety factor of a high liquid limit soil slope sharply decreases.In this case

the landslide will be easy to happen. The safety factor versus slope degree curve of high liquid limit soil slope has a straight line downward trend. But the safety factor versus slope height curve of high liquid limit soil slope shows a slightly upward concave parabola type of downward trend. The research results provide theoretical references for the design

construction and treatment of high liquid limit soil slopes.