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TDR2

TDR2, Time & frequency domain pile integrity tester

Manufacturer NOVATEST

Time & frequency domain pile integrity tester, supplied complete with both simulation & impedance log software

• Reliable interpretation with simulation and impedance software
• Site carry pouch for ease of use on site
• Long battery life keeps you going all day
• Worldwide best seller - used in over 70 countries

The Transient Dynamic Response method is probably the most advanced method of assessing the integrity of piled foundations. This pile integrity tester measures both the input force to a pile as well as the resulting velocity responses and operates in the time and frequency domain. This allows pile shaft properties to be evaluated in 3 dimensions.

The TDR2 pile integrity tester system comprises two main elements, the data acquisition hardware and a sophisticated windows based software package, purpose designed for ease of interpretation and reporting.

The acquisition unit is lightweight, portable and waterproof. It can operate up to 2 days on a single charge and can store over 700 results. Basic analysis can be carried out with the unit on site, including measurement of length, mobility and dynamic stiffness.

The TPAP software is used to transfer data from the TDR2 to a pc, carry out analysis of results and produce reports. The software includes two advanced interpretation modules:

The SIMUL simulation module is used both for predicting the expected TDR test result based on a knowledge of the pile geometry and the soil conditions and for iteratively matching with real test results. The potential influence of geotechnical conditions on individual pile shafts can be assessed and the program is also a very useful tool for interpreting real results obtained on site. Theoretical and site response curves are presented together with details of soil parameters and pile dimensions.

The IMPRO impedance profiling module takes the simulation a step further, and by analysing pile shaft impedance responses from the real result with depth is able to produce a pile shaft cross section profile. The result obtained are easy to interpret and explain to the client . The impedance profile is presented together with cross section profile and details of soil parameters used.

Further details

Time & frequency domain Pile Integrity Tester, supplied complete with both simulation & impedance log software
\
• Reliable interpretation with simulation and impedance software
• Site carry pouch for ease of use on site
• Long battery life keeps you going all day
- pasting• Worldwide best seller - used in over 70 countries
\
The Transient Dynamic Response method is probably the most advanced method of assessing the integrity of piled foundations. This pile integrity tester measures both the input force to a pile as well as the resulting velocity responses and operates in the time and frequency domain. This allows pile shaft properties to be evaluated in 3 dimensions.
\
The TDR2 pile integrity tester system comprises two main elements, the data acquisition hardware and a sophisticated windows based software package, purpose designed for ease of interpretation and reporting.
\
The acquisition unit is lightweight, portable and waterproof. It can operate up to 2 days on a single charge and can store over 700 results. Basic analysis can be carried out with the unit on site, including measurement of length, mobility and dynamic stiffness.
\
The TPAP Software is used to transfer data from the TDR2 to a pc, carry out analysis of results and produce reports. The software includes two advanced interpretation modules:
\
The SIMUL simulation module is used both for predicting the expected TDR test result based on a knowledge of the pile geometry and the soil conditions and for iteratively matching with real test results. The potential influence of geotechnical conditions on individual pile shafts can be assessed and the program is also a very useful tool for interpreting real results obtained on site. Theoretical and site response curves are presented together with details of soil parameters and pile dimensions.
\
The IMPRO impedance profiling module takes the simulation a step further, and by analysing pile shaft impedance responses from the real result with depth is able to produce a pile shaft cross section profile. The result obtained are easy to interpret and explain to the client . The impedance profile is presented together with cross section profile and details of soil parameters used.
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TECHNICAL FEATURES TDR2 Specifications
Measurements:
• Acquisition: 2 channel, 16 bit acquisition at 25Khz sample rate. Pre-trigger on both channels, autoranging gain feature. - Frequency Range: 0 Hz to 5000Hz
• Storage: 700+ results, including 3 data sets per pile with full header information—site, pile no, diameter, operator, transducers and date/time stamp.
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Displays:
• Velocity - Time: Output from geophone in time domain. Used for length calculation
• Force - Time: Used to check the force duration and peak
• Force - Frequency: To check force spectrum and validity - Mobility—Frequency: Mobility or impulse response curve is displayed. Length and pile stiffness calculations can be made using cursors. Theoretical mobility displayed. Measurements are stored.
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Transducers:
• Impulse Hammer: 1.2Kg fibre glass shafted hammer, with built in constant current load cell. Fitted with black plastic tips suitable up to 1500Hz range. Harder tips are available.
• Geophone: Vertical Sensor geophone, type SM6, with natural frequency of 4.5Hz. Nominal output 30 volts/m/sec
• Calibration: both transducers supplied are calibrated, using reference equipment trace able to UK national standards (UKAS). Recommended recalibration interval is 1 year.
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General:
• Keypad: Sealed colour coded and full alpha numeric keypad, tactile and audio feedback
• Operating Temperature: 0 to 50 Deg C
• Size: L 218 x W 187 x D 55mm
• Weight: 1.35Kg - Display: Monochrome LCD Transflective with backlight. Contrast keypad adjustable. Display area 122x70mm. Protective anti reflective glass. - Backlight: Backlit display with auto-off.
• Connectors: Waterproof Lemo type, each with unique configuration. - Data Transfer: USB—cable supplied
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Accuracy:
• Frequency: 0-1000Hz, ±0.5%, Black tip Mobility: 20-800Hz, ±15% - Mobility: 800-1000Hz, ±50%
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Power:
• Battery: 1.2V NiMH rechargeable “AA” cells
• Battery Life: 8hrs+ operation on full charge
• Battery Charge Time: Approx 6Hrs - Charger: External wall plug-in charger for 100/110/250VAC inputs. External cigar plug-in charger for 12VDC inputs. Auto Power off Battery Indicator
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TPAP Software:
The TPAP software is an easy to use platform for analysing results and producing reports. All raw data can be viewed to verify the validity of results.
Piles are tabulated and automatically sorted into number order. Test results can then be accessed directly from the table.
Analysis of pile length can be carried out either in the velocity or mobility views and interpretation can be confirmed by using the simulation and impedance log modules, removing subjective elements.
Simulation Module: This powerful tool can be used to predict the mobility curve using soil and pile properties. It can also be used to assess piles with anomalies by using curve matching in real time. Up to 10 geotechnical layers can be input to simulate real ground conditions.
Impedance Log: The pile shaft impedance is separated from soil effects and plotted against depth. This can effectively be viewed as a pile cross section profile. Often, complex time domain results can be resolved using this method.
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ACCESSORIES - Standard Inclusions
• TDR2 Pile Integrity tester
• Instrumented Hammer
• Spare hammer tip
• Geophone
• USB Data transfer cable
• AC Adapter charger
• DC Charger lead
• Waterproof
• Padded Carrying case
• Protective pouch with neck strap
• Instruction Manual
• TPAP Software CD
• Calibration certificates

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