Use of screw piles in high groundwater conditions

High groundwater levels create certain challenges during construction, requiring a special approach to foundation selection. In such conditions, screw piles are an ideal solution due to their design features, cost, and ease of installation. In this article, we will discuss the features, advantages, and methods of using screw piles in high groundwater conditions.

Characteristics of Soils with High Groundwater Tables

Saturated soils have low bearing capacity, making the use of traditional foundations challenging. Problems associated with high groundwater tables include foundation waterlogging, which can lead to weakening and deformation. The impact of seasonal changes and frost heave on structural stability must also be considered.

Key aspects to consider:

•        Soil moisture: Saturated soils are subject to volume changes during freezing and thawing, which can cause foundation deformation.

•        Corrosivity: High moisture increases the risk of corrosion of metal components, requiring the use of corrosion-resistant materials.

•        Drainage system requirements: High groundwater tables require effective drainage systems to remove excess water.

These soils require careful consideration and adherence to foundation design requirements to avoid structural deformation and damage.

Advantages of Screw Piles in High Groundwater Tables

Using screw piles offers numerous advantages:

•        Minimal soil disturbance: screw piles are screwed into the ground, reducing the risk of soil collapse and providing a more stable foundation.

•        No need for excavation or water pumping: this significantly simplifies the installation process and reduces construction costs.

•        Frost heave resistance: Due to their design features, they are less susceptible to frost heave forces, which is especially important in cold climates.

These advantages make screw piles the optimal choice for construction in difficult soil conditions, ensuring the reliability and durability of the foundation.

Installation of Screw Piles in Water-Saturated Soils

The installation process for screw piles includes the following steps:

1.       Preparatory work: site marking and preparation of the necessary equipment

2.       Pile installation: screw piles are screwed into the ground using specialized equipment

3.       Quality control: checking the correct installation of the piles, their verticality, and the screw-in deviation. Particular attention is paid to monitoring the condition of the anti-corrosion coating, especially in water-saturated soils.

High-quality installation of screw piles ensures foundation stability, reducing the risk of deformation and damage.

Operation and Maintenance of Screw Pile Foundations

To ensure the stability and reliability of screw pile foundations, regular inspections and maintenance are necessary:

•        Regular inspections: Monitor the condition of piles and caps, especially after seasonal changes.

•        Resistance to seasonal changes: Consider the effects of frost heave and shifting soils.

•        Repairs and maintenance: Perform repairs as needed, including installing additional piles or strengthening existing structures.

Proper maintenance and timely repairs help avoid serious problems and extend the life of the foundation.