Parametric Studies on the Behaviour of Reinforced Soil Retaining

Figure 2.14: Bishop’s Simplified Method of Analysing Soil Structures (Alan Mc. Gown, Khen Yeo and
Andrawes, 1990)
Trial Wedges Method:
Slip surfaces in the trail wedge method can be assumed as two straight-line slips
caused by the horizontal earth pressure, similar to the experimental data.
∑
In this equation,
= horizontal earth pressure and
∑ = sum of tensile strengths of the geogrids.
( )
Total horizontal earth pressure components of the two straight- line slips, divided
into two areas, Zone-1 and Zone-2, as shown in Figure 2.15, can be obtained based
on the concept of force polygons. It can be determined that the embankment is stable
when the external force of retaining wall acting is larger than .
Figure 2.15: Trial Wedge Method of Analysing Reinforced Soil Structures (Taga et al., 1992)
27