• Review pile geometry and reinforcement details

• Design thermal sensor layout along pile length

• Install thermal wires or probes inside reinforcement cage

• Secure sensors to prevent movement during concreting

• Connect sensors to data logging system

• Verify sensor functionality before concreting

• Monitor concrete placement and logging start time

• Record temperature data during hydration period

• Continue monitoring until thermal stabilization

• Generate temperature vs depth profiles

• Identify abnormal temperature variations

• Detect necking, bulging, or inclusions

• Verify pile shaft shape and continuity

• Compare results with design diameter

• Prepare detailed thermal integrity report

Thermal Integrity Profiling (TIP) is a non-destructive method that assesses the integrity and geometry of concrete piles by measuring temperature variations during curing. TIP is highly effective for detecting defects such as necking, bulging, or inclusions, and is widely used in Sri Lanka to ensure the quality of bored piles in variable soil and climate conditions.

The method involves installing thermal sensors along the pile shaft before concreting. As the cement hydrates, heat is generated and recorded at multiple depths over time. Abnormal temperature deviations indicate inconsistencies in pile diameter or concrete quality, allowing early detection of potential issues before the pile is subjected to structural loads.

TIP reports provide temperature profiles, defect locations, and engineering interpretations. This information helps designers and contractors verify construction quality, reduce the risk of foundation failure, and ensure that piles meet structural and durability requirements.