Upper Bound Limit Stability Analysis for Soil Slope with Nonuniform Multiparameter Distribution Based on Discrete Algorithm

Table 1

Calculation results of the slope stability coefficient with upper bound limit analysis and the residual thrust method.

	Calculation results of stability coefficient
	Upper bound limit analysis	Residual thrust method	Error rate (%)
Linear distribution of density only	1.306	1.256	3.98
Linear distribution of cohesion only	1.41	1.365	3.30
Linear distribution of internal friction angle only	1.435	1.393	3.02
Density and cohesion changed together	1.454	1.41	3.12
Density and internal friction angle changed together	1.312	1.265	3.72
Cohesion and internal friction angle changed together	1.343	1.298	3.47
Density, cohesion, and internal friction angle changed together	1.355	1.313	3.20