Answer:

Clayey soil is a type of soil that is characterized by its high plasticity, low permeability, and high compressibility. When a pile is driven into clayey soil, it will experience both skin friction and point resistance. The skin friction is the resistance that occurs along the surface of the pile as it moves through the soil, while the point resistance is the resistance that occurs at the tip of the pile.

Explanation:

Low Point Resistance:

- When a pile is driven into clayey soil, it will experience low point resistance because the soil is highly compressible and cannot provide a significant amount of support to the pile.

- The clayey soil will deform and compress under the weight of the pile, which will result in a low point resistance.

- This low point resistance can make it difficult to drive the pile to a desired depth or to achieve the required load capacity.

High Skin Friction:

- On the other hand, when a pile is driven into clayey soil, it will experience high skin friction because the soil particles will adhere to the surface of the pile.

- This skin friction will provide additional support to the pile and increase its load capacity.

- However, the high skin friction can also make it difficult to drive the pile into the soil because it creates a significant amount of resistance.

Improvement of Structure of Surrounding Soil:

- As the pile is driven into the soil, it will also improve the structure of the surrounding soil by compacting it and increasing its density.

- This can be beneficial in situations where the soil is unstable or prone to settlement.

- The compacted soil will provide additional support to the pile and increase its load capacity.

Conclusion:

In conclusion, driving a pile into clayey soil will result in low point resistance, high skin friction, and improvement of the structure of the surrounding soil. These factors should be taken into consideration when designing and constructing foundations in clayey soil.