ความอ่อนไหวของพารามิเตอร์ในการคำนวณเสถียรภาพของลาดดิน

Abstract

This study investigates the sensitivity of parameters to enable analysts to better understand the significance of factors influencing the stability analysis of soil slopes. A total of nine parameters were examined: (1) the analysis method used, (2) soil unit weight, (3) soil cohesion, (4) soil internal friction angle, (5) slope inclination, (6) slope height, (7) water level at the slope face, (8) external forces acting on the embankment, and (9) seismic forces. The results show that the moment equilibrium method and the limit equilibrium method yield similar safety factor values, while the force equilibrium method produces the lowest safety factor. The selection of soil unit weight should correspond to the characteristics of the soil, as the sensitivity of this parameter only affects the calculation of soil cohesion. For soil cohesion and internal friction angle, an increase in these parameters results in a higher safety factor. Regarding slope inclination and height, increasing these values decreases the safety factor. Conversely, an increase in the water level at the slope face leads to a higher safety factor, although the sensitivity of the water level is specific to the calculation of soil cohesion. For external forces acting on the embankment and seismic forces, an increase in these forces reduces the safety factor. The sensitivity of external forces acting on the embankment has the most significant impact on the calculation of soil cohesion and internal friction angle.