隔裂夹层复合路面疲劳寿命分析研究  

Fatigue Life Analysis and Engineering Application of Interlayer Composite Pavement

作　　者：黄金龙 HUANG Jinlong(Fuzhou Planning&Design Research Institute Group Co.,Ltd.,Fuzhou 350108,China)

机构地区：[1]福州市规划设计研究院集团有限公司,福建福州350108

出　　处：《粉煤灰综合利用》2024年第5期108-115,共8页Fly Ash Comprehensive Utilization

摘　　要：设置隔裂夹层能提高“白改黑”复合路面的疲劳寿命,延缓加铺面层反射裂缝的出现。通过扩展有限元数值模型,对比不同条件下设置微黏结级配碎石隔裂夹层,研究隔裂夹层复合路面的疲劳寿命。结果表明:对旧水泥混凝土路面出现断板、错台等严重路面病害,设置微黏结级配碎石隔裂夹层能显著提高复合路面的疲劳寿命;对旧板打裂压稳后,设置微黏结级配碎石隔裂夹层能提高复合路面的疲劳寿命,建议打裂的板块尺寸控制在100 cm左右为宜;对于旧板碎石化后设置隔裂夹层,复合路面疲劳寿命提高不显著;微黏结级配碎石隔裂夹层复合路面结构。经过多年工程实践运用,效果良好,具有一定的推广价值。The installation of a crack-separating interlayer can improve the fatigue life of the"white-to-black"composite pavement and delay theappearance of reflective cracks on the overlay surface.Using the extended finite element numerical model,the impact of setting micro-bonding graded crushed stone interlayer under different conditions is compared and analyzed,and corresponding engineering suggestions are proposed.The results show that the setting of a micro-bonding graded crushed stone interlayer can significantly improve the fatigue life of composite pavements under severe pavement defects such as broken slabs and faulted slabs on old cement concrete pavements;After cracking and stabilizing the old plates,setting up a micro-bonding graded crushed stone interlayer can improve the fatigue life of the composite pavement.It is reco mmended that the size of the cracked plates be controlled at around 100 cm;For the old plate crushed and then set up a crack-resistant interlayer,the fatigue life of the composite pavement is not significantly improved;The micro-bonding graded crushed stone interlayer composite pavement structure has been applied in engineering practice for many years,with good results and certain promotion value.

关 键 词：道路工程 复合式路面 微黏结级配碎石隔裂夹层 疲劳寿命 

分 类 号：U416[交通运输工程—道路与铁道工程]