The selection of a particular type of foundation is often based on several factors, such as:
1. enough depth
The foundation must have sufficient depth to prevent frost damage, For foundations such as bridge piers, the depth of the foundation should be sufficient to prevent reduce by scrape,
2. bearing capacity failure
the foundation must be secure a bearing capacity failure,
3. a settlement
foundation should not compromise To the extent that it damages the structure.
The foundation must be of sufficient quality so that it does not corrode, such as sulfate attack,
5. enough strength
The foundation must be designed with sufficient strength that it will not fracture or break under the applied superstructure load. The construction of the foundation should also be done properly according to the design specifications.
6. adverse soil changes
The foundation must be able to resist adverse soil changes over a long period of time. An example is expanded clay, which can expand or shrink Due to the movement of the foundation and damage to the structure.
7. seismic force
The foundation must be able to support the structure during a Earthquake Without excessive settlement or lateral movement.
Based on an analysis of all the factors listed above, a specific type of foundation (i.e., shallow versus deep) will be recommended by a geotechnical engineer.
The image below can be used as a guide for selecting the appropriate type of foundation based on different soil conditions.