When the soil reaches the limit equilibrium state, the location of shear failure surface must be on the maximum shear stress surface( )
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In the seepage and consolidation mechanical model of saturated soil, the pore water pressure is equal to 0 and the effective stress is equal to the total stress at the instant of external force application( )
According to the overconsolidation ratio of soil samples, the soil layer can be divided into normal consolidated soil, overconsolidated soil and underconsolidated soil( )
Direction of resultant force of the earth pressure at rest is horizontal and the action point is located at H / 3 from the top of the retaining wall( )
For non-cohesive soil slopes, when the stability safety factor K = 1, the slope angle is equal to the internal friction angle of the soil, also known as the natural angle of repose( )