Structural Assessment of Flexible and Rigid （柔性和刚性结构评估）.pdfVIP

Structural Assessment of Flexible and Rigid Airfield Pavement Marc Stet KOAC Pavement Consultants, Apeldoorn, Netherlands Bert Thewessen Witteveen+Bos, Deventer, Netherlands Janpiet Verbeek Ministry of Defence, Central Directive DGWT, The Hague, Netherlands Keywords: Standard for H/FWD evaluation of airfield pavement, software tool. ABSTRACT: The structural condition of in-service airfield pavements, measured in either re- maining life or strength of the pavement is normally deduced from the FWD response which in- volves the application of a simulated load in order to model a pavement. The assessment of the structural condition using NDT technologies including FWD, radar, coring and material testing is relatively common practice today. FWD tests have a good load and deflection repeatability. Meas- ured deflections are translated into stresses or strains by back-calculation of the pavement structure. Whilst measurements are performed in a relatively standardized manner, several interpretation methodologies have been developed in the last few decades. By applying different evaluation and interpretation techniques to the same source data different results can be obtained which can lead to different conclusions and maintenance strategies. This paper addresses a methodology developed in the Netherlands for assessing the structural condition of rigid and flexible pavement. 1 INTRODUCTION In the last decade, a lot of effort has been given to harmonize and/or standardize pavement condi- tion tests and assessment methods. In order to harmonize H/FWD condition surveys in the Nether- lands, CROW instigated the development of guidelines for calibrating FWD equipment (Crow 1998a). Whilst measurements are performed in a relatively standardized manner, several interpre- tation methodologies have been developed over the last decades. By using different evaluation and interpret