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PILE INTEGRITY TESTER
Pile Integrity Tester (PIT-Q)
The Pile Integrity Tester (PIT-Q) assesses the structural integrity of drilled shafts/bored piles ,ACIP/CFA and drilled displacement piles, driven concrete or timber piles and concrete filled pipes. The PIT-Q performs wave equation-based non-destructive foundation investigations known as Low Strain Impact integrity Tests or Low Strain Dynamic Tests, providing assurance that a pile or shaft is free of major cracks and voids.
PIT-Q conforms with ASTM D5882 and other codes, specifications and norms.
The PIT-Q is a one-person operation with data that may reveal potentially dangerous defects such as:
Major cracks
Necking
Soil inclusions or voids
The PIT may also be used to test piles integral in the structure, such as those supporting existing bridges or towers, and may assess their length.
With the PIT, any form of the test is performed quickly, potentially making it possible to test every pile on a job site with no pre-planning required.
The PIT Test :
The PIT test consists of attaching one or two accelerometers to a foundation and using a hand-held hammer to impact the pile top. The PIT collects the acceleration data and displays curves that reveal any significant changes in cross section that may exist along the shaft. The impact of the hammer generates a stress wave that propagates down the foundation and reflects back up. The accelerometer collects data that reveals the pattern of wave propagation and reflection. Piles without defects typically show a reflection from the pile toe at the expected time, which corresponds to the pile length. If a defect is present along the shaft, its size and location affect the propagation and reflection time of the wave. PIT tests may also help estimate the depth of the pile toe (the pile length) if the pile is intact with embedment less than 30 times the pile diameter. PIT data is evaluated in the field and later transferred to a computer for further analysis by the PIT-W software.
Specification
Physical : Size: 272 X 212 X 60 mm (10.7 x 8.3 x 2.4 in)
Weight: 2.04 Kg (4.5 lbs)
Sunlight readable VGA colour display for any lighting conditions,
Resolution 800 x 600 pixels
Screen size: 21.3 cm (8.4”)
Temperature Range:
a. Operating: ‐20 to 40˚ C (-4 to 104˚ F);
b. Storage: ‐30 to 65˚ C (-22 to 149˚ F)
Powered by Internal Battery (10-hour duration)
Electronic :
Data Storage: Built in 256 GB drive USB port for data retrieval 24-bit A/D converter Analog
Signal Frequency response: 22 KHz. (‐3dB)
Sampling Digitizing frequency of > 1 MHz (net frequency after DSP > 32 KHz.) Sampling Frequency accuracy within 0.01%
Sampling speeds of 50 KHz, 75 KHz, and 150 KHz.
Windows 10 Operating System.
Functional :
One (PIT‐QV) or two (PIT‐QFV) channels of acceleration data acquisition One (PIT‐QV) or two (PIT‐QFV) integrators of acceleration to velocity.
PIT‐QV accepts data from one traditional accelerometer.
PIT‐QFV accepts data from two traditional accelerometers or from one traditional accelerometer and one traditional instrumented hammer
Input of names and descriptions for each pile tested .
Date and time stamps ,Signal amplification capability : variable over time Available record sizes: 1K, 2K, and 4K .
Data can be averaged over a variable number of blows FFT (Fast Fourier Transform) feature.
Other :
Includes licenses of PIT‐W Standard and PIT‐S Demo License
Soft carrying case Full one‐year warranty Operates in English or Metric units
Technical manual provided in PDF form on a USB drive
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