 the formula_56and formula_58 parameters, can be obtained either analytically or through relevant charts; see Pantelidis) 

formula_59 and formula_60 are the effective elastic constants of soil (i.e.the Young modulus and Poisson's ratio respectrively) 

formula_61 is the wall height 

formula_62 is the depth where the earth pressure is calculated 

formula_63with formula_64

formula_65with formula_66
formula_67with formula_68
formula_69with formula_70

formula_71where, formula_72, formula_73, formula_74 and formula_75

with formula_76

formula_77 and formula_78 are parameters related to the transition from the soil wedge of the state at rest to the soil wedge of the passive state (i.e., inclination angle of soil wedge changing from formula_79 to formula_80.Also, formula_81 and formula_82 are the lateral displacement of the wall and the lateral (maximum) displacement of the wall corresponding to the active or passive state (both at depth formula_62).