FORMULA OF RANKINE PASSIVE EARTH PRESSURE IN TRIAXIAL STATE OF STRESS
三向应力作用下的Rankine被动土压力公式

The traditional formula of Rankine passive earth pressure of retaining wall is deduced based on Mohr-Coulomb strength theory in which the intermediate principal stress is not considered. In this paper,the formula of Rankine passive earth pressure of retaining wall in triaxial state of stress is established based on twin shear strength theory. A calculation example shows that the passive earth pressure of retaining wall is increased when the influence of the intermediate principal stress is considered.