The numerical model of the Internal friction angle and Saturation Degree affect the vertical displacement of the ground

The numerical model of the different vertical displacement and the internal friction angle variations were determined carefully by the Viet Nam Standard. The difference between experimental values and simulation of the PLAXIS 3D software, was shown remarkably as the maximum value was shown in 0.01975 m (z = -36.9m) depth with ϕ 0   = 29 0 ) ; whereas the minimum value in 0.002844 m (z = 0m) depth with ϕ 0   = 2 0 . The mean value at the center of the Clay layer (from 0.0m to 27.0m) depth was obtained at 0.0577m whereas compared with 0.0156 m at the Sand layer (from 27.0 to 39.6m) depths. Moreover, water content (W%) and porosity (P%) were calculated particularly at the maximum value of 94.35% (borehole “HK 2”) with 4.8m depth, whereas the minimum value is 18.22% at 39.3m depth (borehole “HK3”) ; which compared with porosity (P%) of 71.9% (borehole “HK2”) at 4.8m depth, and 40.4% (borehole “HK3”) at 4.8m depth. On the other hand, Saturation results presented a relatively low mean value of 88.09% and 86.79% at the center of the ground (from 4.3m to 15.3m). The increase of 23% and 75.42% (from 18.3m to 39.3m) as compared with the research of Zapatata, 1999.