This article provides generic advise on foundation options for Interbloc.
The foundation plays a crucial role in maintaining the integrity of any structure. It is influenced by various factors, including the diverse ground conditions found across the country. Due to this variability, it is not feasible to provide standardised foundation designs. This article aims to offer general guidance for planning and pricing purposes. However, it is important to note that the information provided here should not be considered a substitute for a specific engineering design prepared by a qualified engineer. Please be aware that Envirocon does not engage in foundation design work.
Interbloc Structure Foundations
- It is always best to place an Interbloc structure on a concrete foundation.
- A level, firm concrete foundation speeds up installation, and eliminates the risk of settling over time.
- A compacted gravel foundation can be used for retaining walls and low height bulk storage applications.
- The compacted gravel foundation should be between 300mm and 600mm thick, and should be made of GAP65 or similar aggregate.
- A final, thin, layer of fines (i.e. sand) should be used to provide a final level surface for the blocks to be placed.
- The type of vertical reinforcing used has a significant impact on the type of foundation required.
- If the blocks are tied into the foundation, a concrete foundation is required.
- If the blocks are simply tied together, a compacted gravel foundation can be used.
- Envirocon has conducted some generic analysis on the potential sizing of concrete foundations for cantilever walls.
- The analysis assumed that the bearing capacity of the ground is defined as 'good ground' (300kpa), a material density of 18kN/m, and a friction angle of 30 degrees.
|
Surcharge |
Footing |
Wall Height |
|||||
|
1200 |
1800 |
2400 |
3000 |
3600 |
4200 |
||
|
0 kPa |
W |
700 |
800 |
1050 |
1400 |
1750 |
2150 |
|
D |
150 |
200 |
225 |
250 |
300 |
350 |
|
|
L |
50 |
150 |
300 |
500 |
600 |
800 |
|
|
5 kPa |
W |
750 |
950 |
1250 |
1550 |
1950 |
2350 |
|
D |
200 |
225 |
250 |
275 |
300 |
350 |
|
|
L |
100 |
200 |
400 |
700 |
700 |
900 |
|
|
10 kPa |
W |
850 |
1100 |
1425 |
1750 |
1950 |
2500 |
|
D |
175 |
200 |
250 |
275 |
300 |
350 |
|
|
L |
200 |
300 |
400 |
600 |
700 |
1100 |
|
The above table is intended for planning and pricing purposes and is not a substitute for a specific engineering design.
Additional Notes
- The specific foundation requirements for an Interbloc structure will vary depending on the size and type of structure, the ground conditions, and the loads that the structure will be subjected to.
- It is always advisable to consult with a structural engineer to determine the specific foundation requirements for your Interbloc structure.