Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Field Evaluation of the Multi-Depth Deflectometers
The Multi-Depth Deflectometer (MDD) is an LVDT deflection measuring device which is retrofitted into pavement layers. A maximum of six MDD modules may be installed in a single 1.5-inch diameter hole. The modules are clamped against the sides of the hole at the required depths and the center core is attached to an anchor located approximately 7 feet below the pavement surface. The MDD can measure either the relative elastic deflection or the total permanent deformation of each layer in the pavement system. By placing multiple modules in a single hole, the vertical strains induced in pavement layers can be measured. The report describes the installation of Multi-Depth Deflectometers at the Texas A&M Research Annex. The pavement response under both Falling Weight Deflectometer and truck loading is described, together with an analysis procedure to backcalculate layer moduli from depth deflection readings. The MDD results obtained are extremely promising. The device is relatively inexpensive and durable. It shows a great potential in assisting in several areas of pavement research, including backcalculation analysis, tire pressure and rutting studies.
Field Evaluation of the Multi-Depth Deflectometers
The Multi-Depth Deflectometer (MDD) is an LVDT deflection measuring device which is retrofitted into pavement layers. A maximum of six MDD modules may be installed in a single 1.5-inch diameter hole. The modules are clamped against the sides of the hole at the required depths and the center core is attached to an anchor located approximately 7 feet below the pavement surface. The MDD can measure either the relative elastic deflection or the total permanent deformation of each layer in the pavement system. By placing multiple modules in a single hole, the vertical strains induced in pavement layers can be measured. The report describes the installation of Multi-Depth Deflectometers at the Texas A&M Research Annex. The pavement response under both Falling Weight Deflectometer and truck loading is described, together with an analysis procedure to backcalculate layer moduli from depth deflection readings. The MDD results obtained are extremely promising. The device is relatively inexpensive and durable. It shows a great potential in assisting in several areas of pavement research, including backcalculation analysis, tire pressure and rutting studies.
Field Evaluation of the Multi-Depth Deflectometers
T. Scullion (Autor:in) / J. Uzan (Autor:in) / J. I. Yazdani (Autor:in) / P. Chan (Autor:in)
1988
58 pages
Report
Keine Angabe
Englisch
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