Toppling failure is one of the main instability modes of the vertical slabbed rock slope.However

the current calculation methods of the slope toppling critical height is based on the assumptions that the rock is a linear elastic body

a damage body or a creep body

respectively.However

the rock mass in engineering practices often has the damage and creep properties

and therefore the existing studies cannot meet the practical engineering needs.In this paper

considering the soft rock having both damage and creep properties

the corresponding calculation methods of the slope toppling critical height are obtained based on the classical Euler compression rod model when the rock is assumed as the Maxwell creep body

the Weibull statistical damage body and the combined body with damage and creep properties

respectively.In addition

the effect of the relevant parameters on the calculation results is discussed.The calculation results show that the effect of the mesoscopic damage should be considered in toppling calculation of the vertical slabbed rock slope.When the rock creep property is taken into account

the slope toppling critical height decreases generally following an exponential law with the elapsed time.