Innovative Roadway Evaluations by Infrasense
Infrasense, a leader in subsurface scanning technology, embarked on an extensive evaluation involving approximately 200 lane-miles of traffic speed deflectometer (TSD) data and advanced 3D ground penetrating radar (3DGPR) data. The initiative aimed to derive valuable insights into pavement performance by integrating TSD information with layer thicknesses determined from the onboard 3DGPR system. This comprehensive approach facilitated the calculation of critical factors such as pavement layer moduli, structural number, remaining lifespan, and recommended asphalt overlay thicknesses.
Detailed Evaluation Process
The thorough evaluations encompassed a review of TSD data gathered by the Mississippi Department of Transportation (MDOT) across various locations. Infrasense worked alongside MDOT to identify and prioritize essential areas for in-depth analysis. The analysis focused on five specific project sections, each extending around five miles, which were selected for closer examination and comprehensive analysis.
TSD and 3DGPR Data Synergy
The collaboration allowed for detailed calculations related to pavement performance, including asphalt thickness, base thickness, and other critical measurements. The compiled data were documented in a comprehensive spreadsheet, offering vital information like standard route identifiers, log miles, and GPS coordinates. This meticulous documentation ensures a clear understanding of the pavement condition across the evaluated sections.
Identifying Structural Integrity
By extracting 25 channels spaced 3 inches apart from the 3DGPR data, Infrasense processed the information using calibration data to discern layer boundaries effectively. This analysis provided a broader understanding of the pavement structure and its condition. The 3DGPR data covered a significant width, facilitating the identification of potential issues—in particular, areas of elevated base moisture content and signs of stripping in asphalt layers.
Comprehensive Structural Analysis
The integration of TSD and GPR data led to an extensive assessment of subgrade moduli, effective structural numbers, and the estimated remaining service life of pavement layers. This analysis revealed crucial anomalies such as weak pavement layers and soft subgrades that warranted further attention. By determining layer coefficients and identifying deficient layers, Infrasense laid a robust foundation for subsequent recommendations.
Rehabilitation Recommendations
Following rigorous analysis, Infrasense made concrete recommendations for rehabilitation strategies, including base repairs, asphalt layer patching, and overlay proposals. These insights are pivotal for developing expansive corridor planning and management strategies for key roadways, helping to enhance overall roadway performance and safety.
About Infrasense, Inc.
Founded in 1987, Infrasense, Inc. has become a trusted name in the field of subsurface scanning, leveraging innovative technologies to tackle complex challenges. The company’s engineers specialize in nondestructively extracting critical information relevant to a diverse array of infrastructure projects. Apart from providing essential ongoing subsurface evaluation services nationwide, Infrasense also engages in extensive research initiatives aimed at advancing the methodologies used in subsurface detection and nondestructive evaluation.
Frequently Asked Questions
What is the primary focus of Infrasense's recent evaluations?
Infrasense recently focused on evaluating roadway conditions using traffic speed deflectometer (TSD) and 3D ground penetrating radar (3DGPR) analyses.
How does Infrasense utilize TSD and GPR data in their evaluations?
The company combines TSD data with layer thicknesses from GPR analysis to assess pavement structures and recommend necessary rehabilitation steps.
What types of recommendations are made based on the analysis?
Recommendations range from base repairs to asphalt overlay options aimed at improving roadway durability and performance.
What role does MDOT play in the evaluation process?
MDOT collaborates with Infrasense by providing data and assisting in the identification of priority evaluation areas throughout the project.
How long has Infrasense been in business?
Infrasense has been operational since 1987, gaining extensive experience in subsurface scanning and evaluation technologies.
