Nabin Kumar Ijam | Civil & Hydropower Engineer

STABILITY ANALYSIS OF RETAINING WALL

1. GEOMETRY OF WALL

STEM DIMENSION

Top width (\(t_w\) in m):

Bottom width (\(b_w\) in m):

Height of stem (\(h\) in m):

TOE SLAB DIMENSION

Length of toe (\(L_t\) in m):

Thickness of toe (\(h_t\) in m):

HEEL SLAB DIMENSION

Length of heel (\(L_h\) in m):

Thickness of heel (\(h_h\) in m):

2. GEOTECHNICAL PARAMETER

2.1 Foundation material

Bearing Capacity of foundation material (\(σ_b\) in kN/m²):

Angle of internal friction of foundation material (\(φ_f\) in degree):

Cohesion of foundation material (\(C_f\) in kN/m²):

2.2 Backfill material

Density of soil (\(Y_s\) in kN/m³):

Saturated Density of soil (\(Y_{sat}\) in kN/m³):

Inclination of slope at hill side (\(i_h\) in degree):

Angle of internal friction (\(φ\) in degree):

Depth of soil in heel side from top of slab (\(h_s\) in m):

Depth of soil in Toe side from top of slab (\(h_{toe}\) in m):

3. WATER LEVELS

Water depth in heel side from top of slab (\(WT_h\) in m):

Water depth in toe side from top of slab (\(WT_t\) in m):

4. OTHERS

Density of concrete (\(Y_c\) in kN/m³):

Horizontal seismic coefficient (\(A_h\)):

Consideration of earth pressure (1-Active & Passive and 2-At rest):

Passive pressure coefficient (\(P_s\) in %):

LOAD CALCULATION

SN	Load name	Symbol	Unit	LoadType
1.	Self-weight of the structure	\(F_1\)	kN	Vertical
2.1	Earth pressure above WT in hill side	\(F_2h_1\)	kN/m	Horizontal
2.2	Earth pressure below WT in river side	\(F_2h_2\)	kN/m	Horizontal
2.3	Earth pressure above WT in river side	\(F_2r_1\)	kN/m	Horizontal
2.4	Earth pressure below WT in river side	\(F_2r_2\)	kN/m	Horizontal
3.1	Soil load (including water) in hill side	\(F_3h\)	kN	Vertical
3.2	Soil load (including water) in river side	\(F_3r\)	kN	Vertical
4.1	Hydrostatic pressure at hill side	\(F_4h\)	kN/m	Horizontal
4.2	Hydrostatic pressure at river side	\(F_4r\)	kN/m	Horizontal
5	Uplift	\(F_5\)	kN	Vertical
6	Seismic load	\(F_6\)	kN	Horizontal

STABILITY ANALYSIS

SN	Combination	FOS against Sliding	FOS against Overturning	Eccentricity(m)	Minimum bearing pressure(kNm²)	Maximum bearing pressure(kNm²)
1	Normal condition
2	Seismic condition