隔裂夹层复合路面疲劳寿命分析研究

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（Fuzhou Planning & Design Research Institute Group Co.，Ltd.， Fuzhou 3501O8，China）

Abstract：Theinstalationofacrack-separating interlayercan improvethefatigue lifeof the"white-to-black"composite pavementand delay theappearanceofreflective cracksontheoverlay surface.Using theextendedfiniteelementnumerical model，theimpactof seting micro-bondinggradedcrushedstoneinterlayerunderdiferentconditions iscomparedand analyzed，andcorrespondingengineeringsuggestionsareproposed.Theresultsshowthatthesetingofamicro-bondinggraded crushed stoneinterlayercansignificantly improve thefatiguelifeofcomposite pavements under severe pavement defects suchas broken slabsand faultedslabs onoldcementconcrete pavements；Aftercracking and stabilizing theoldplates，settng upa micro-bondinggradedcrushedstoneinterlayercanimprovethefatiguelifeofthecompositepavement.Itisrecommendedthat the size of the cracked plates be controlled at around 100cm ；For the old plate crushed and then set up a crack- resistant interlayer，thefatiguelifeof thecompositepavementisnotsignificantlyimproved；Themicro-bondinggradedcrushedstone interlayercompositepavement structurehasbeenappliedinengineringpracticeformanyyears，withgoodresultsandcertain promotion value.

Keywords：road engineering；composite pavement；micro-bonded graded gravel interlayer；fatigue life

0 引言

延缓沥青加铺面层出现反射裂缝是路面“白改黑”工程面临的一个棘手问题。（剩余9049字）