Soil layers in Bangkok

Did you know? Bangkok has approximately 4–5 main soil layers.

This has a significant impact on the construction of buildings, foundations, and piles.

The soil layers in Bangkok are as follows:

Soft clay

With an average thickness of 10–15 meters, the soil is soft, making buildings prone to subsidence and a major cause of house sinking problems.

Medium stiff clay

Located approximately 15–20 meters deep, it is stronger than before, but still unsuitable for high-rise buildings.

Sand layer

Found at depths of approximately 20–50 meters, this soil layer has good load-bearing capacity and is suitable for supporting long piles.

Hard clay with sand/gravel

Located more than 50 meters deep, it is strong and stable, serving as a foundation for large structures.

Hard soil layer / Weathered rock (Hard Stratum)

Deeper than 60 meters, it is the strongest layer, suitable for supporting tall buildings and large-scale construction projects.

Understanding soil layers is crucial for designing piles and foundations to prevent settlement problems and ensure the long-term structural integrity and safety of buildings.

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