原文传递
Development of a Rolling Dynamic
Deflectometer for Continuous Deflection
Testing of Pavements
| 题名： | Development of a Rolling Dynamic Deflectometer for Continuous Deflection Testing of Pavements |
| 作者： | James A. Bay and Kenneth H. Stokoe, II |
| 关键词： | Rolling dynamic deflector (RDD), pavement testing, highway pavement testing, airport pavement testing, deflection testing, nondestructive resting, pavement predictions |
| 摘要： | A rolling dynamic deflectometer (RDD) was developed as a nondestructive method for determining continuous deflection profiles of pavements. Unlike other commonly used pavement testing methods, the RDD performs continuous rather than discrete measurements. The ability to perform continuous measurements makes RDD testing very effective for quickly characterizing large sections of pavement while simultaneously providing a comprehensive picture of the pavement condition, with little danger of missing critical pavement features. RDD testing is performed while the RDD vehicle navels at speeds of up to I.S mph (2.4 km/hr). Continuous deflection profiles determined with the RDD can be used to; 1) assess the overall stiffness of a pavement: 2) differentiate the relative stiffnesses of different regions; 3) detect cracks, joints, and weak regions; 4) assess tire performance of cracked or jointed regions: 5) delineate the regions of the pavement influenced by joints and cracks: and 6) identify areas where additional discrete testing should be performed. The RDD is a powerful tool having the potential for 1) designing pavement repairs and retrofits, 2) estimating the remaining life of pavements, and 3) functioning as a quality assurance and quality control system during tire construction of new pavements. The RDD was constructed by modifying the electrohydraulic loading system on a Vibroseis truck. The RDD applies large sinusoidal dynamic forces to the pavement through specially design^ loading rollers. The resulting deflections are simultaneously measured by rolling sensors designed to minimize the influence of noise caused by rough pavement surfaces. Distance measuring and data acquisition systems were designed to record the forces applied to the pavement and the resulting dynamic displacements; these systems also track the position of the RDD. The RDD was used to determine continuous deflection profiles at two sites on Interstate Highway 10 over a total length of 21 mi (33.5 km). These results were used to assess the condition of the pavement and to design an overlay. The RDD was also used to test runway and taxi way airport pavements at the Dallas-Fort Worth International Airport as pan of a project to predict the remaining life of the airport pavements. Finally, the RDD was used in a stationary mode to dynamically load bridges and bridge foundations. All testing except the bridge project is presented in this report |
| 报告类型： | 科技报告 |
相关文献
- Development of a Rolling Dynamic Deflectometer for Continuous Deflection Testing of Pavements; Rept. for Sep 96-Aug 97
- PROFILING FLEXIBLE HIGHWAY PAVEMENT CONTINUOUSLY WITH ROLLING DYNAMIC DEFLECTOMETER AND AT DISCRETE POINTS WITH FALLING WEIGHT DEFLECTOMETER.
- EVALUATING RUNWAY PAVEMENTS AT SEATTLE-TACOMA INTERNATIONAL AIRPORT: CONTINUOUS DEFLECTION PROFILES MEASURED WITH THE ROLLING DYNAMIC DEFLECTOMETER.
- DEVELOPMENT AND PRELIMINARY INVESTIGATION OF ROLLING DYNAMIC DEFLECTOMETER.
- Continuous Profiling of Runway and Taxiway Pavements with Rolling Dynamic Deflectometer at Dallas–Fort Worth International Airport
- Determination of the Remaining Life of Rigid Airfield Pavement Through Super-Accelerated Pavement Testing
检索历史
应用推荐
