Pavement structural condition plays a critical role in the rate of pavement deterioration, yet
most state highway agencies' network-level decision-making processes are primarily
based on surface distresses. Despite the limitations of the traditional structural condition
measuring devices, some states have experimented with stationary deflection devices for
network-level applications. Over the past decade, continuous deflection devices have
become capable of measuring the network-level pavement structural condition
information. However, since the traffic speed deflection devices use newer technology,
there is a need for guidelines on how the state agencies could make use of this information
for pavement management decision-making. This dissertation developed processes and
enhanced tools to incorporate the pavement structural condition from the TSD into
Virginia's network-level pavement management process
This first part of the study developed pavement deterioration models for a subset of road
networks in Virginia, to show that the pavement structural condition as measured by the
TSD has an impact on the rate of deterioration of the surface condition. A structural
condition matrix was then developed to augment the treatment selection process currently
used by VDOT. Application of the augmented matrix on the tested Interstate network
resulted in reducing the percentage of the network requiring CM and increasing the
percentage requiring PM and RM.
The second part of the study investigated the possibility of using pavement deflection
measurements obtained from the TSD for network-level structural evaluation of pavements
in Virginia. The study reported that the structural condition obtained with the TSD can
replace the structural condition obtained from the FWD that is currently used in the VDOT
PMS. The effective structural number (SNeff) calculated from the TSD and FWD had
similar distribution, and the calculated consistency between the TSD SNeff and FWD
SNeff was higher than the consistency between the SNeff from two repeated sets of FWD
measurements.
The third part of the study simulated the network level decision-making approaches based
on both the structural condition parameter and the surface condition parameter, considering
cases with and without the pavement treatment interval. The study reported that network-level decisions based on the pavement surface condition alone can result in significantly
different treatment selection, compared to decisions based on the pavement structural
condition. The study reported savings of 9% and 11% for cases with and without
considering the pavement treatment intervals, using decision-making based on the
structural condition. / Doctor of Philosophy / Pavement structural condition plays a critical role in the rate of pavement deterioration, yet most state highway agencies' network-level decision-making processes are primarily based on surface distresses. Despite the limitations of the traditional structural condition measuring devices, some states have experimented with stationary deflection devices for network-level applications. Over the past decade, continuous deflection devices have become capable of measuring the network-level pavement structural condition information. However, since the traffic speed deflection devices use newer technology, there is a need for guidelines on how the state agencies could make use of this information for pavement management decision-making. This dissertation developed processes and enhanced tools to incorporate the pavement structural condition from the TSD into Virginia's network-level pavement management process'
This first part of the study developed pavement deterioration models for a subset of road networks in Virginia, to show that the pavement structural condition as measured by the TSD has an impact on the rate of deterioration of the surface condition. A structural condition matrix was then developed to augment the treatment selection process currently used by VDOT. Application of the augmented matrix on the tested Interstate network resulted in reducing the percentage of the network requiring CM and increasing the percentage requiring PM and RM.
The second part of the study investigated the possibility of using pavement deflection measurements obtained from the TSD for network-level structural evaluation of pavements in Virginia. The study reported that the structural condition obtained with the TSD can replace the structural condition obtained from the FWD that is currently used in the VDOT PMS. The effective structural number (SNeff) calculated from the TSD and FWD had similar distribution, and the calculated consistency between the TSD SNeff and FWD SNeff was higher than the consistency between the SNeff from two repeated sets of FWD measurements.
The third part of the study simulated the network level decision-making approaches based on both the structural condition parameter and the surface condition parameter, considering cases with and without the pavement treatment interval. The study reported that network-level decisions based on the pavement surface condition alone can result in significantly different treatment selection, compared to decisions based on the pavement structural condition. The study reported savings of 9% and 11% for cases with and without considering the pavement treatment intervals, using decision-making based on the structural condition.
| Identifer | oai:union.ndltd.org:VTETD/oai:vtechworks.lib.vt.edu:10919/108080 |
| Date | 01 February 2022 |
| Creators | Shrestha, Shivesh |
| Contributors | Civil and Environmental Engineering, Flintsch, Gerardo W., Sivaneswaran, Nadarajah, Katicha, Samer Wehbe, Wang, Linbing |
| Publisher | Virginia Tech |
| Source Sets | Virginia Tech Theses and Dissertation |
| Language | English |
| Detected Language | English |
| Type | Dissertation |
| Format | ETD, application/pdf |
| Rights | In Copyright, http://rightsstatements.org/vocab/InC/1.0/ |
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