Low-strain, hammer impact
Impulse-echo with a special plastic hammer and accelerometer. Large quantities in one day, six PIT devices in stock.
Impulse-echo, PIT
Service
Integrity test
Low-strain, cross-hole and thermal integrity testing (TIP). Thousands of piles per year, every defect documented. The finding holds up in court, not only in a folder.
Hammer impact method
One impact, one echo, one finding.
The method is based on the impulse-echo principle. A blow with the hand hammer initiates a stress wave that travels through the pile at a material- and age-dependent speed. If it hits an impedance change, such as a cross-section change, an echo arrives at the pile head and is recorded.
In the cross-hole method, transmitter and receiver probes move simultaneously in two water-filled measuring tubes. The ultrasound wave travels through the concrete horizontally, the depth is measured continuously. The method is non-destructive and made for large quantities. In one year we tested over 9,000 piles this way.
Thermal integrity testing
TIP: the concrete reveals itself while curing.
Curing concrete releases heat. Temperature sensors inside the pile record this process over the entire pile length while the concrete hardens.
A larger cross-section produces more heat, a smaller one less. Cross-section changes can be identified from the deviations, without exposing the pile and without waiting for the test age.
Cross-hole, ultrasound
Transmitter and receiver in water-filled measuring tubes, depth gauge on the cable. For large bored piles and high verification requirements.
CHUM, CSL
Thermal integrity testing (TIP)
Temperature measurement inside the pile while the concrete cures. Deviations in the heat curve reveal cross-section changes without exposing the pile.
measured during curing
Pile length determination
Determine the length of existing piles, even when no records exist anymore. Signal travel time instead of paperwork.
Existing and new build
Our service
Test, assess, document.
- Coordinate the test scope, consider measuring tubes already in the planning
- Measurement at the pile head, non-destructive and without interfering with the construction schedule
- Evaluation of the signal travel speeds and reflections
- Assessment of the integrity classes per EA-Pfähle and DGGT
- Assessment of cross-section changes and defects
- Documentation per pile with position, measurement curve and finding
Technology
Equipment and key figures.
- PIT devices
- 6 units, usable in parallel
- Excitation
- Special plastic hammer, accelerometer
- Ultrasound
- CHUM, Cross-Hole Ultrasonic Monitor
- Measuring tubes
- water-filled, transmitter and receiver with depth gauge
- Result
- Integrity, pile length, cross-section change, travel speed
- Throughput 2017
- around 9,100 piles on 136 construction sites
From practice
Integrity testing in action.
Answers
Frequently asked questions
All questions on process, methods, standards and scheduling are in the FAQ section.
Project inquiry
Request a project
Tell us the project, the number of piles and the planned test load. You will receive a test concept with a quote within two business days.