Thermal Integrity Profiling

is a non-destructive testing method used to assess the quality and continuity of deep foundation elements such as drilled shafts, bored piles, and diaphragm walls. By analyzing the temperature distribution of curing concrete, this method reveals anomalies like necking, inclusions, or poor concrete zones—ensuring integrity and construction reliability.

How it works?

Thermal sensors (typically thermal wires or probes) are installed inside the reinforcement cage before concrete placement. As the concrete cures, it generates heat through hydration. The temperature is recorded over time and compared across the element’s cross-section. Deviations from expected patterns may indicate defects, changes in geometry, or inconsistent concrete quality.

Sensor installation

Thermal wires or probes are mounted on the reinforcement cage prior to concreting.

Concrete placement and curing

As concrete cures, heat of hydration creates a thermal signature throughout the element

Data collection

Temperatures are recorded at regular intervals via a data logger or wire reader.

Analysis and reporting

Temperature profiles are analyzed to detect changes in shape, continuity, or material integrity.

Process steps

TIP is typically conducted during construction, directly after concrete placement, to provide early validation of pile quality.

Preparation

Sensor positioning

Position thermal sensors evenly along the reinforcement to ensure full-depth coverage.

Concrete pouring

Begin data logging

Start temperature monitoring immediately after concrete is placed

Data analysis

Profile interpretation

Compare actual temperature trends with expected profiles to locate irregularities.

Reporting

Defect detection

Prepare a report indicating any anomalies, defects, or signs of reduced structural integrity

Benefits

Non-invasive and reliable

Provides high-resolution data without damaging the structure

Early defect identification

Detects flaws at early stages, allowing timely corrections and quality control.

Full element coverage

Monitors the entire shaft depth, not just localized points

Compliance and documentation

Creates a documented proof of quality that supports engineering decisions and regulatory requirements

Gdzie Termiczne profilowanie integralności znajduje zastosowanie?

Geotechnics

Residential construction

Infrastructure

Tunnels

Energy construction

Have Questions? Contact Us

Frequently Asked Questions

Is thermal profiling better than cross-hole sonic logging (CSL)?

TIP covers the entire volume of the element, while CSL is limited to paths between tubes. TIP is especially useful for elements without pre-installed access tubes.

When should thermal data collection begin?

Ideally, temperature monitoring starts immediately after concrete placement to capture the full heat curve of hydration.

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