A beginner-friendly guide to pile foundations and the situations that require them.
When surface soils are too weak to support a building, engineers use pile foundations to carry the load deep down to firmer ground.
What is a pile?
A pile is a long, slender column installed into the ground. Groups of piles are tied together with a pile cap that supports the structure above.
When are piles needed?
- Soft or filled soils near the surface
- Heavy loads from high-rise buildings
- Structures near water such as jetties and bridges
Types of piles
Bored cast-in-situ piles
Concreted in place after drilling; common for buildings in Dhaka.
Driven piles
Pre-cast piles hammered into the ground, useful for certain sites.
Quality matters
Pile load testing and integrity testing confirm that piles perform as designed.
Need deep foundation design? Contact Geotech & Structures Ltd.
Planning a project in Bangladesh?
Our specialist engineers apply exactly what this article covers to real projects — from structural & foundation design to 3D visualisation. See our completed projects.
Prof. Dr. Ahasanul Kabir
Former Professor of Civil Engineering Department, BUET
This article was reviewed for technical accuracy by Prof. Dr. Ahasanul Kabir, ensuring it reflects sound engineering practice and Bangladesh National Building Code (BNBC) standards.
