According to the experimental data in soft soil foundation pit in Shanghai

this paper presents the variation of calculating earth pressure based on the different shear strength parameters. Considering national codes

technical specifications and local code

combined with the practical and local experiences

the applicability of different shear strength parameters are analyzed. In the design of supporting structure for foundation pit

this paper suggests that shear strength parameters of consolidated undrained experiment should be used to calculate earth pressure; and that shear strength parameters of consolidated quick direct shear test may be used to calculate earth pressure when with credible experiences.