RC Retaining Wall Design

Project information

Appears on the printed calculation sheet

Project

Checked by

Date

Revision

Wall geometry

Stem, footing and shear key dimensions — drives the section views

Total wall height(H)

Stem thickness at top(t_top)

Stem thickness at base(t_base)

Toe length(L_toe)

Heel length(L_heel)

Footing thickness(t_ftg)

Key depth (0 = none)(d_key)

Key width(b_key)

Depth of soil over toe(D_toe)

Backfill slope angle(β)

Wall length (elevation)(L_w)

Material properties

ACI 318-19 §19.2 · §20.2 · §20.5

Concrete strength(f'c)

psi

Steel yield strength(fy)

psi

Concrete unit weight(γc)

pcf

Clear cover — stem(cc)

Clear cover — footing(cc)

Main bar size

Horizontal / stirrup bar

Stirrup spacing (0 = none)(s_v)

Ec — §19.2.2.1

3,834,254 psi

wc^1.5 · 33 √f'c

fr — §19.2.3

474.3 psi

7.5 λ √f'c

λ — §19.2.4

1.000

Table 19.2.4.1(a)

Soil & loading

Backfill properties, surcharge, water table and seismic coefficient

Backfill unit weight(γs)

pcf

Angle of internal friction(φ)

Coefficient of base friction(μ)

Allowable bearing capacity(q_a)

psf

Surcharge load(q_s)

psf

Water table depth (0 = none)(d_w)

Water unit weight(γw)

pcf

Seismic coefficient(kh)

Ka (active)

0.3333

tan²(45 − φ/2)

Kp (passive)

3.0000

tan²(45 + φ/2)

Load factors & safety factors

ACI 318-19 §5.3 · service-level stability requirements

Dead load(γD)

Lateral earth pressure(γH)

Lateral earth (counteracting)(γH,c)

Surcharge / live(γL)

Fluid pressure(γF)

Min FS — overturning

Min FS — sliding

Max eccentricity e/B

Section views

Cross-section, elevation and critical sections

Cross-section · earth pressure, bearing pressure & reinforcement

Elevation · bar layout along the wall length

Governing check

Pass

T&S reinforcement

DCR 0.90 · §24.4