Nabin Kumar Ijam | Civil & Hydropower Engineer

STABILITY ANALYSIS OF RETAINING WALL

INPUTS FOR STABILITY ANALYSIS
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):

Fig. Retaining wall
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 %):

INPUT FOR REINFORCEMENT DESIGN

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

Load name

Symbol

Load Intensity

Unit

Load (kN)

Center of Gravity

LoadType

Resisting moment(kNm)

Overturning moment(kNm)

Self-weight of the structure

\(F_1\)

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

\(F_3h\)

Vertical

3.2

Soil load (including water) in river side

\(F_3r\)

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

Uplift

\(F_5\)

Vertical

Seismic load

\(F_6\)

Horizontal

Combination

FOS against Sliding

FOS against Overturning

Eccentricity(m)

Minimum bearing pressure(kNm²)

Maximum bearing pressure(kNm²)

Normal condition

Seismic condition

STABILITY ANALYSIS OF RETAINING WALL

DESIGN RESULTS

REINFORCEMENT DESIGN OUTPUTS