隔裂夾層復(fù)合路面疲勞壽命分析研究

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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

延緩瀝青加鋪面層出現(xiàn)反射裂縫是路面“白改黑”工程面臨的一個棘手問題。（剩余9049字）