温度荷载作用下沥青路面Top-Down裂缝扩展规律研究  

Study on the Propagation Rule of Top-Down Cracking in Asphalt Pavements under Temperature Loads

作　　者：王伟[1,2] 王强 李敏方 崔之靖 胡超 徐鹏[5] 李婷 WANG Wei;WANG Qiang;LI Minfang;CUI Zhijing;HU Chao;XU Peng;LI Ting(China Communications Construction Company Limited,Beijing 100088,China;CCCC First Highway Engineering Group Co.,Ltd.,Beijing 100088,China;The Second Engineering Company of CCCC Fourth Harbor Engineering Co.,Ltd.,Guangzhou 510300,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]中国交通建设股份有限公司,北京100088 [2]中交一公局集团有限公司,北京100088 [3]中交四航局第二工程有限公司,广州510300 [4]中铁二院工程集团有限责任公司,成都610031 [5]石家庄铁道大学,石家庄050043

出　　处：《路基工程》2025年第1期8-13,共6页Subgrade Engineering

基　　金：国家自然科学基金项目(52108331,52208358);河北省高等学校科学技术研究项目(QN2021127);中国中铁股份有限公司科技研究开发计划(2022-重大-02)。

摘　　要：以河北某高速公路路面结构为研究对象,基于扩展有限元理论和热边界理论建立含Top-Down(自上而下)裂缝的沥青路面结构模型,研究温度荷载作用下沥青路面Top-Down裂缝的扩展规律,分析循环温度荷载作用下沥青路面裂缝的贯穿时间。结果表明:在温度荷载作用下,沥青路面Top-Down裂缝以张开型扩展趋势为主;减小温差、降低面层模量可抑制沥青路面Top-Down裂缝的扩展;循环温度作用时,Top-Down裂缝贯穿时间为6.39年。Taking the pavement structure of an expressway in Hebei Province as the research object,a structural model for asphalt pavements with Top-Down cracking was established based on the extended finite element theory and thermal boundary theory.The propagation rule of Top-Down cracking under temperature loading was studied,and the penetration time of asphalt pavement cracking under cyclic temperature loading was analyzed.The research results indicate that under temperature loading,Top-Down cracking in asphalt pavements mainly exhibit an opening-type expansion trend.Reducing temperature differentials and decreasing the surface layer modulus can inhibit the expansion of top-down cracks.Under cyclic temperature loading,the time for Top-Down cracking to penetrate is 6.39 years.

关 键 词：沥青路面 温度 Top-Down裂缝 扩展有限元 模量 

分 类 号：U416.217[交通运输工程—道路与铁道工程]