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Concrete Retaining Wall to AS4678's banner

Concrete Retaining Wall to AS4678

Verified by the CalcTree engineering team on September 27, 2024.

This calculator designs a concrete retaining wall to ensure it can withstand earth pressures, surcharge loads and environmental factors. It determines the design capacities of the retaining wall to meet stability, bearing, and structural design requirements.
This calculation has been written in accordance with AS4678:2002.
Design checks for a retaining wall are not explicitly stated in AS4678. The design methods presented below are based on Advanced Soil Mechanics by Braja M. Das and Module 6: Earthquake resistant retaining wall design published by the New Zealand Geotechnical Society.

Summary 
Design Check
Parameter
Utilisation
Status
Sliding
Sliding Force= 189.061759 kilonewton
0.60
🟢
Overturning
Overturning Moment= 519.659623 kilonewton * meter
1.37
🔴
Bearing Pressure
Bearing pressure= 85.698726 kilopascal
0.34
🟢

Calculation

Technical notes

1. Properties

1.1 Classifications

1.2 Materials

1.3 Geometry

Stem wall:


hw
:3.00 m​



t1
:200 mm​



t2
:200 mm​



B
:1.00 m​

Base:


Lheel
:0.90 m​



Ltoe
:2.80 m​



hf
:400 mm​

Key:


Use key
:Yes​



hk
:300 mm​



Lk
:300 mm​



Xk
:3.60 m​

Soil:


beta
:0.0 degrees​



hs
:0.00 cm​

Can’t display the image because of an internal error. Our team is looking at the issue.



2. Loads

2.1 Dead Loads

2.2 External Loads



3. Design Checks

The below design checks follow the procedures outlined in Advanced Soil Mechanics by Braja M. Das.

3.1 Sliding Check

Sliding forces:


SU1
:54.53 kN​




Resisting (lateral) forces:


V
:109.35 kN​






RU1
:77.00 kN​






Sliding check
:ϕSU1 > RU1 🟢 Ok​






3.2 Rotation Check

Overturning moments:


Ms,a
:41.33 kN m​






Ms2,SW
:0.00 kN m​






Ma,DL
:0.00 kN m​






Ma,LL
:10.13 kN m​






SU2
:64.33 kN m​




Restoring moments:


Ms1,SW
:167.67 kN m​






M,DL
:0.00 kN m​






M,LL
:15.53 kN m​






Ms,p
:-0.84 kN m​






Mw,SW
:127.99 kN m​






RU2
:310.34 kN m​






Overturning check
:ϕSU2 > RU2 🟢 Ok​






3.3 Settlement Check



V
:109.35 kN​






Af
:3.90 m^2​






M
:258.88 kN m​






c
:1.95 m​






I
:4.94 m^4​






SS3
:130.16 kPa​






RS3
:150.00 kPa​






Settlement check
:SS3 > RS3 🟢 Ok​







Related Resources

  1. Concrete Slab-on-grade Designer to AS3600
  2. Rectangular Footing Design to AS3600
  3. Concrete Shear Wall to AS3600