Development of a New Methodology for Characterizing Pavement Structural Condition for Network- Level Applications
نویسندگان
چکیده
Huge quantities of bituminous mix in the form of seal coats and HMAC thin overlays are applied by the TxDOT every year to improve ride quality and seal existing cracks, but these measures do not correct possible underlying weaknesses that will cause roughness or distress to quickly reappear. As a result, the overall pavement condition keeps deteriorating due to the structural deformation of pavement layers and the subgrade, even though surface treatments are applied periodically. The developed methodology introduces the Structural Condition Index (SCI). The SCI is based on the estimated effective Structural Number (SN), and its main purpose is to discriminate pavements that need structural reinforcement from the ones that are in sound structural condition. In addition, a contingent sampling procedure was developed to determine the minimum number of FWD tests required for each management section of pavements. The comprehensive guidelines were developed for using the SCI in the selection of the best maintenance and rehabilitation alternatives at network level. Finally, a pilot application of the SCI was carried out with several pavement rehabilitation projects to verify the validity of the developed SCI, with the intention that modifications would be made to the developed procedure if such a need is determined from the pilot application.
منابع مشابه
Summary of Research Findings on the Development of a New Methodology for Characterizing Pavement Structural Condition for Network-Level Applications
متن کامل
Developing a Network-Level Structural Capacity Index for Structural Evaluation of Pavements
The objective of this project was to develop a structural index for use in network-level pavement evaluation to facilitate the inclusion of the pavement’s structural condition in pavement management applications. The primary goal of network-level pavement management is to provide the best service to the users for the available, often limited, resources. Pavement condition can be described in te...
متن کاملPrediction of The Pavement Condition For Urban Roadway A Tehran Case Study (RESEARCH NOTE)
This report is the result of a research project on a pavement management system that was preformed by the Transportation Division of Iran University of Science and Technology. Information used in the project was collected from 20 zones of the Tehran Municipality. Any maintenance and repair system for roads is normally compared of a number of general and coordinated activities in conjunction wit...
متن کاملDevelopment of An Artificial Neural Network Model for Asphalt Pavement Deterioration Using LTPP Data
Deterioration models are important and essential part of any Pavement Management System (PMS). These models are used to predict future pavement situation based on existence condition, parameters causing deterioration and implications of various maintenance and rehabilitation policies on pavement. The majority of these models are based on roughness which is one of the most important indices in p...
متن کاملEvaluation of the Pavement Structural Condition at Network Level Using Falling Weight Deflectometer (fwd) Data
Large amounts of seal coats and thin overlays are applied every year by state highway agencies to improve the surface condition of pavements, but these measures have not successfully prevented the problem from reoccurring. As a result, the overall pavement condition keeps deteriorating because of the structural deformation of pavement layers and the subgrade. To make effective decisions about t...
متن کامل