旧刚性道面上沥青加铺层反射裂缝产生机理研究

近年来，我国５０年代修建的机场道面面临着翻修。在水泥混凝土道面上加铺沥青面层较以往的水泥混凝土盖被具有很大的优越性。但是在低温条件下，沥青加铺层易产生反射裂缝．本文在分析旧道面上沥青加铺层反射裂缝产生机理的基础上，研究了用特殊有限元法计算沥青加铺层裂缝尖端附近应力强度因子的计算方法。结合室内反射裂缝模拟试验成果，可以用来研究不同防治反射裂缝措施的效果。

THE MECHANISM STUDY OF PRODUCTION REFLECTION CRACKING IN ASPHALT ADDING LAYER ON OLD RIGIDITY PAVING

The surface of airport run-way of 50's has been confronted with rebuilding for these years. Adding asphalt layer on the surface of run-way of cement mixture was much more better than adding cement cover. But under the condition of low temperature, it was easy to produce reflection cracking in asphalt adding layer. On the bace of analysis the produnction reflection cracking,the special finite element method was studied for calculation the stress strength factor which near to the cracking point in asphalt adding layer,method here studied and connection with the model experiment result of reflection cracking in room, can use for making the measures of different prevention reflection cracking.