Retaining wall

Retaining side

Soil unit weight, γ

Pressure coefficient method

Friction angle, φ'

Backfill angle, β

Active pressure coefficient, K_a

Active pressure coefficient, K_a

Passive pressure coefficient, K_p

Passive pressure coefficient, K_p

Base width, B

Base thickness, D_b

Toe depth, D_t

Toe width, B_t

Wall thickness, D_w

Wall offset

Retaining height, H

Footing cover, h_c

Surcharge load

Force (active), P_a

Moment (active), M_a

ULS load factors: ψ_soil = 1.25, ψ_surcharge = 1.5

ULS sliding, P*

ULS moment, M*

Concrete strength, f'_c.wall

α₂ , γ

Steel strength, f_sy

Bars -

Cover , d

Neutral axis ratio, k_u

Moment capacity, ΦM_u.wall (Φ = 0.85)

Moment capacity check, M*/ΦM_u.wall

Concrete strength, f'_c.foot

α₂ , γ

Bars -

Cover , d

Neutral axis ratio, k_u

Moment capacity, ΦM_u.foot (Φ = 0.85)

Moment capacity check, M*/ΦM_u.foot

Factored weight, 0.8R_v

Angle of wall friction, δ (2φ'/3 insitu concrete)

Base friction, P_p.base (R_vtanδ)

Key reaction, P_p.key

Total reaction, P_p

Sliding check, P*/P_p

Resisting moment, M_R

Overturning check, M_a/M_R

Allowable bearing pressure, q_B

Footing weight, q_SW

Peak bearing pressure, q*

Bearing check, q*/q_B