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A REAL TIME SCOUR MEASUREMENT INSTRUMENT

Award Information

Agency:
National Science Foundation
Branch:
N/A
Award ID:
14369
Program Year/Program:
1993 / SBIR
Agency Tracking Number:
14369
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
North American Geotechnical Co
3 Lakewood Lane Seabrook, TX 77586
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Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1993
Title: A REAL TIME SCOUR MEASUREMENT INSTRUMENT
Agency: NSF
Contract: N/A
Award Amount: $250,000.00
 

Abstract:

PROPOSED IS A NEW INSTRUMENT BASED ON THE REFRACTION MODE OFSEISMIC SURVEYING TO MEASURE THE DEVELOPMENT OF SCOUR ADJACENT TO A BRIDGE PIER OR ABUTMENT. THE INSTRUMENT USES A REPEATABLE ACOUSTIC SOURCE PLACED NEXTTO THE CONCRETE STRUCTURE AND AN ARRAY OF HYDROPHONES IN A PVC PIPE THAT IS BURIED VERTICALLY IN THE RIVER BED NEXT TO THE PIER. THE ACOUSTIC SOURCE EMITS REPEATED SIGNALS THAT ARE REFRACTED DOWN THE PIER INTO THE SOIL. THE REFRACTED WAVES PROPAGATE TO THE RECEIVER ARRAY ACCORDING TO SHELL'S LAW. SIGNAL ENHANCEMENT THROUGH SUMMING REPEATED EXPERIMENTS IS POSSIBLE BECAUSE THE RATE OF SCOUR IS SLOW COMPARED TO THE TOTAL TRAVEL TIME OF THE REFRACTED ENERGY. SCOUR IS MEASURED AS THE DELAY CAUSED IN THE TRAVEL TIME TO SUCCESSIVELY DEEPER HYDROPHONES AS THE SCOUR ZONE DEEPENS.

Principal Investigator:

Dr. E.b. Davies
Principal Investigator
0

Business Contact:

Small Business Information at Submission:

North American Geotechnical Co
3658 Lake St Houston, TX 77098

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No