| Seismic Approach to Quality Management of HMA MnDOT Contract No. 1034287 Federal Project Number: TPF-5 (341) Execution: January, 2020 - December, 2021 |
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| PROJECT PROGRESS (January, 2021) |
Project Tasks | Summary (see details)
- Task 1: Project Management and Administration
Task 2: Hardware Development (Seismic Data Acquisition System) & Testing
Task 3: Software Development & Testing
Task 4: Delivery and Demonstration of Seismic Data Acquisition System and Software
Task 5: Final Report
Year 1 (2020):
Year 2 (2021):
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Summary
- Field Test with New 16-Channel Array and DAQ at Gunpowder Mill (January 9, 2021)
- Norrfee Tech tested the newly built 16-channel array in the field (see photo below). The array is now attached through more rigid metal
bar (instead of wood bar) to the main frame of the bicycle rack. The array was wrapped with cloths to protect it from external wet
conditions on the road. The impact source was attached to an independent bar separate from the receiver array to minimize the
possible transmission of its impact vibration to the receiver array. It was tightened to the bar through a rubber cushion to further
insulate its vibration from the holding bar. This time, the impact source ("bouncing ball") was attached to the bar through a strap shorter
than previously used. This resulted in more frequent impacts. More details about the new array, its attachment on the bicycle rack,
waveforms collected at two different speeds (slow 15 km/h and fast 30 km/h), voltage ranges of waveforms, 16-channel field records,
and their corresponding dispersion images are presented in this report prepared by Norrfee Tech.
- AUTO Evaluation of Data from Gunpowder Mill by Using ParkSEIS-HMA
- The ParkSEIS-HMA used two of the field data sets obtained during the field campaign outlined above to test the automatic analysis
mode of the software. One data set ("T210109_25.TDMS") contained ten (1) records of all correctly triggered acquisition. The other
data set ("T210109_140.TDMS") contained one hundred (100) records of both false and valid triggers.
The results of shear-wave velocity (Vs) and thickness (H) profiles are presented in this report for different "lateral continuity (LC)" values
that are directly related to the lateral averaging of the dispersion images. The report also presents evaluation results for different
attributes such as DC bias, raw field records, automatic muting, and dispersion images for different LC values for all constituent records
(10 and 100) of the two data files.
| Progress Table (Prime Contractor - Park Seismic LLC) - January, 2021 |
| Progress Table (Sub Contractor - Norrfee Tech) - January, 2021 |
Park Seismic LLC, Shelton, Connecticut, Tel: 347-860-1223, Fax: 203-513-2056, Email: contact@parkseismic.com
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