Question

What do you mean by Shallow Foundations ? Explain the different types of shallow foundation with suitable examples.

14 May 2026
Answer :
Word Count : 728
Shallow foundations are those types of foundations in which the depth of the foundation is generally less than or equal to its width and the load of the structure is transferred to the soil at a relatively shallow depth near the ground surface. They are adopted when the surface soil has sufficient bearing capacity to support the structural loads without excessive settlement. In building construction, shallow foundations are commonly used for light to moderate load structures such as residential buildings, small commercial buildings, and boundary walls. The main principle is to spread the load of the structure over a sufficiently large area so that the pressure on the soil remains within safe limits. Shallow foundations are preferred when the competent soil layer is available at a small depth, and when deep excavation is not economical or necessary. They are simpler in design, easier to construct, and more cost-effective compared to deep foundations. However, their performance depends greatly on soil conditions such as bearing capacity, compressibility, and water table level. One of the most common types of shallow foundation is the isolated or pad footing. This type is used to support a single column and is generally square, rectangular, or circular in shape. The size of the footing is designed based on the load coming from the column and the safe bearing capacity of the soil. For example, in a residential building with RCC
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