United States Department of Transportation
i
Rating and Inventory of TDOT Retaining Walls
-
2021-11-01
-
[PDF-6.31 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final Report May, 2019 – October 2021
-
Corporate Publisher:
-
Abstract:To meet the requirements under the Moving Ahead for Progress in the 21st Century Act (MAP-21), Tennessee Department of Transportation (TDOT) decided to develop a management program covering condition rating, service life prediction and inventory of retaining walls in the State of Tennessee to protect the safety and welfare of the public. This project created a comprehensive rating and inventory system to inspect, assess and record the condition of all walls throughout the State. A systematic approach that integrates analytic hierarchy process (AHP) and Markov model for rating the current and predicting the future conditions of retaining walls was developed. An overall rating score, as well as the composite scores following the two-part rating approach, were achieved through hierarchical configuration and pairwise comparison of retaining wall elements using AHP that respects engineering principles by considering importance weights. The aggregated rating scores, together with transition probabilities, are then passed on to the Markov model for retaining wall future condition rating and service life prediction. A GIS-based prototype mapping system and searchable inventory database was established to visually display and save key parameters of wall location, dimension, condition, risk and estimated cost of actions, and additional information. Moreover, this report includes a pilot study of thirty-one geographically distributed wall locations and short summaries of site survey. The findings of this project will provide TDOT the capability to establish effective retaining wall maintenance and replacement priorities in support of MAP-21.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
