... friction angle , unit cohesion and undrained cohesion of the ground ; , and is the friction angle , cohesion and unit cohesion was not impaired drainage of land background . The decline in value ... futher researched and compared to other calculation methods to find out errors and draw out rules . The method of calculation may continue to be studied in case of building the embankment reinforced ... angle , unit cohesion and undrained cohesion of the ground ; , and is the friction angle , cohesion and unit cohesion was not impaired drainage of land background . The decline in value is calculated...