旧沥青路面结构层反演动态模量修正探讨

摘要

Back-calculation is an important method to obtain the dynamic modulus of old asphalt pavement layers.But due to differences in stress states,it exhibited great differences in back-calculated dynamic modulus and indoor material modulus.Through the field test scheme design and indoor dynamic modulus test,the dynamic modulus of old pavement layers back-calculated by FWD deflection basin were corrected to indoor test level.Dynamic modulus revision coefficient of old asphalt pavement surface course and semi-rigid base were respectively put forward,and the reliability of the results were verified by reliable analysis.The research results can be referenced for the reforming design of old pavement and re-lated research.%反演是获取旧路面结构动态模量的重要手段，但由于受力状态不同，反演动态模量与材料室内模量具有较大差异。通过现场试验方案设计以及室内动态模量试验，将 F WD 弯沉盆反演的旧路面结构动态模量修正至室内试验水平，分别提出了旧路面沥青面层和半刚性基层的结构动态模量修正系数，并通过精度分析验证了结果的可靠性，研究成果可为旧路面改造设计及相关研究提供参考依据。