The author suggests that, when a drop shaft subsides in normal conditions, not only it bears the earth pressure of the pit but also suffers from the passive soil pressure on the foot blade of the drop shaft.

Through a detailed analysis of a failed pit supporting project, the authors calculated the initiative and passive soil pressures of the cement-stirred pile retaining wall, conducted checking computations of its resistance to overturning and slipping, and put forward such solutions as unloading, sloping, sealing-up and reinforcing.

The calculation of passive earth pressure under rigid translation mode;

Improvement on calculating method of passive earth pressure considering translational movement effect;

Calculated method of passive earth pressure in deep pit engineering considering excavation effect;

Study on soil stress state and earth pressure distribution behind retaining wall;