Loading...

FWD Data Collection Protocols and Optimum Pavement Maintenance and Rehabilitation Strategies at Network Level

Matini, Narges | 2017

456 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50269 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Tabatabaee, Nader
  7. Abstract:
  8. The objective of this study was to develop an approach for incorporating techniques used to interpret and evaluate deflection data for network-level pavement management system applications. Because it disrupts traffic flow, is a potential safety problem and because of the expense of data collection and analysis, structural capacity is not currently evaluated at the network level by many agencies. A national pavement management system is being developed in Iran and the use of falling weight deflectometers (FWDs) at the network level was deemed necessary to compensate for the lack of vital construction history data in the pavement inventory. It was imperative to increase the interval between FWD testing points as much as possible to allow scanning of the entire 51,000 km network of freeways, highways and major roads in a reasonable time span with the least traffic disruption. A project level dataset at 0.2 km intervals in different environments and diverse traffic categories were chosen for analysis. Also, data from continuous ground-penetrating radar was collected concurrently and compared to a limited number of cores. The overall analysis included evaluation of interval variations, segmentation, the structural condition index (SCI), and layer moduli calculated using the AASHTO and ELMOD methods. The analysis was done to determine the optimum interval between test points that would increase the rate of testing. Analysis showed that the collection intervals could be increased from 0.2 to 0.6 km. Subsequently, the applicability and time efficiency of the network level intervals were verified by overlay thicknesses and time required
  9. Keywords:
  10. Nondestructive Test ; Falling Weight Deflectometery (FWD) ; Pavement Mnagement System ; AASHTO T-283 Standard ; Highways Network ; Network-Level Interval

 Digital Object List

 Bookmark

No TOC