Calculation of Active Earth Pressure for Narrow Backfill with a Curved Slip Surface

Table 2

Nonlinear sliding curves for comparison with test curves.

Shape of slip surface	Notation in this paper	Constraint conditions of the curve	Reference
Parabolic curve	ParaGoel	The slip surface crosses the wall base point (0, 0), and the tangent at this point is the Rankine slip surface. The upper width of the sliding body is 0.62 times that of Rankine’s sliding body.	Goel and Patra [7]
Parabolic curve	ParaNew	The slip surface crosses the wall base point (0, 0) and wall top point (W, H), and the tangent at this point is the Rankine slip surface.	Proposed curve in this paper
Exponential curve	ExpTsagareli	The exponential slip surface crosses the wall base point (0, 0).	Tsagareli [8]
Exponential curve	ExpNew	The exponential slip surface crosses the wall base point (0, 0) and wall top point (W, H).	Proposed curve in this paper