Contiguous Pile Wall

Contiguous Pile Wall (CPW)

Contiguous pile walls are a cost-effective shoring solution used to support excavations in relatively stable soil conditions. The system consists of closely spaced bored piles installed side by side to form a continuous retaining structure.

Construction Method

This wall is constructed by installing cast-in-situ bored piles with small gaps between them, typically ranging from 50mm to 100mm depending on soil conditions and design requirements.

Each pile is reinforced and concreted individually, forming a row of piles that act together to retain the surrounding soil.

Key Features

Contiguous pile walls are economical and require relatively simple equipment and mobilization. They are suitable for projects with limited depth and stable ground conditions.

However, these walls are not inherently watertight, and additional measures may be required if groundwater control is critical.

Execution Process

The process begins with layout marking and, if required, guide wall construction. Piles are then drilled using support fluid or temporary casing.

Reinforcement cages are lowered into the boreholes, followed by concreting. The sequence continues pile by pile to form the complete retaining wall system.

Limitations & Considerations

Contiguous pile walls are generally suitable for excavation depths up to 12–14 meters. In loose soils or high water table conditions, there may be risks of soil or water ingress, which must be carefully managed.

Applications

These walls are commonly used for small to medium-scale projects, shallow basements, and sites where economical shoring solutions are required.

Our Services

Provides structural support ensuring stability during deep excavation and construction

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