Verifying Foundation Pile Installation and Load-Bearing Capacity

Verifying Pile Integrity with Torque Monitoring

Proving Quality and Compliance with Accurate Torque Measurement

Piling is a deep foundation technique used to transfer structural loads to stable soil or rock layers far below the surface. During pile insertion it is important to monitor and log key metrics such as torque, RPM, depth, angle, and rotations, as this data is vital for ensuring installations are compliant and of a consistent quality.

When combined with geotechnical surveys, this data provides a comprehensive record for assessing soil resistance and verifying load-bearing capacity. Real-time torque monitoring, in particular, enables installers to meet design specifications, identify variations in subsurface conditions, and provide a traceable record for quality assurance and compliance.

Indirect Torque Measurement: Hydraulic Pressure

Hydraulic pressure-based torque estimation infers torque by measuring the differential pressure across a hydraulic motor. While relatively simple to use, this method is highly susceptible to inaccuracy, as equipment inefficiencies, fluid properties, and variable soil conditions can all cause misleading torque readings. These inaccuracies also risk overloading the piling rig itself, leading to costly equipment damage and failure.

Direct Torque Measurement: Strain Gauge-Based Sensors

By contrast, strain gauge-based inline sensors offer a more accurate and reliable method of measuring torque during pile installation.

These sensors, such as the Auger Hawk by Datum Electronics directly capture mechanical strain within the drive shaft, providing real-time torque data that reflects the true load-bearing conditions of the pile.

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