开级配碎石透水基层集料颗粒微观接触劣化机制  

Microscopic Contact Degradation Mechanism of Aggregate Particles of Open-graded Gravel Permeable Base

作　　者：陈德[1,2] 吴太恒 曹雪梅 张浩然 乔志 李玉坤 牛昌昌 王迎丹 王泗 苏谦[1,2] 周仲荣[5] CHEN De;WU Tai-heng;CAO Xue-mei;ZHANG Hao-ran;QIAO Zhi;LI Yu-kun;NIU Chang-chang;WANG Ying-dan;WANG Si;SU Qian;ZHOU Zhong-rong(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;Key Laboratory of High-speed Railway Engineering of Ministry of Education,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;Science and Innovation Center of Inner Mongolia Expressway Group Co.Ltd.,Hohhot 010010,Inner Mongolia,China;Inner Mongolia Research Institute of Comprehensive Transportation Science,Hohhot 010010,Inner Mongolia,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]西南交通大学高速铁路线路工程教育部重点实验室,四川成都610031 [3]内蒙古高速公路集团有限责任公司科创中心,内蒙古呼和浩特010010 [4]内蒙古综合交通科学研究院,内蒙古呼和浩特010010 [5]西南交通大学机械工程学院,四川成都610031

出　　处：《中国公路学报》2024年第1期20-34,共15页China Journal of Highway and Transport

基　　金：呼和浩特市重大科技专项(2021-重-社-3);内蒙古自治区科技计划项目(2021GG0038);内蒙古自治区交通运输科技项目(NJ-2022-14);国家自然科学基金青年基金项目(51808462);博士后面上项目(2018M643520);四川省科技计划项目应用基础研究项目(2020YJ0039);成都市科技项目重点研发支持计划技术创新研发项目(2019-YF05-00002-SN);四川省自然科学基金面上项目(2023NSFSC0346);西南交通大学基础研究培育支持计划项目(2682023ZTPY032);西南交通大学新型交叉学科培育基金项目(2682022JX008)。

摘　　要：针对服役期开级配碎石透水基层集料颗粒微观接触劣化问题,研制了界面微观摩擦磨损劣化试验台,分析了界面微观摩擦磨损作用参数对集料颗粒接触界面微观劣化的影响规律,研究了服役期开级配碎石透水基层内部集料颗粒接触界面微观摩擦、磨损、界面构造水平及分布特性的演变规律。结果表明:集料颗粒接触界面微观劣化最佳试验参数为:10 N的法向接触荷载、5 Hz的相互作用频率和5 mm的相互作用位移幅值;水存在工况下玄武岩、石灰岩、花岗岩3种工程常见母岩材质的集料颗粒接触界面摩擦因数,均出现不同程度的降低现象,质地较软的石灰岩集料颗粒接触界面摩擦因数降低程度最大;集料颗粒接触界面磨损主要发生在颗粒摩擦接触初期阶段,水环境的存在一定程度上降低了集料颗粒接触界面磨损程度;磨屑造成的集料颗粒接触界面磨斑表面长波低频段和短波高频段的纹理构造水平低于集料颗粒自身晶粒构造造成的中波中频段纹理构造水平,水存在工况能够降低长波低频段和短波高频段的纹理构造,凸显集料颗粒自身晶粒构造造成的中波中频段纹理构造。研究成果有望为长寿命透水路面透水基层建设提供理论借鉴。In order to solve the problem of micro contact deterioration of aggregate particles in open-graded crushed stone permeable base layer during service period,this study developed the interface micro friction and abrasion deterioration test bench,analyzed the influence of interface micro friction and abrasion parameters on the micro deterioration of the contact interface of aggregate particles,and researched the evolution of the micro friction and abrasion of the contact interface of aggregate particles,and the level and distribution characteristics of the interface in the open-graded crushed stone permeable base layer during service period.The results show that:the best test parameters for the micro-degradation of aggregate particle contact interface are:10 N normal contact load,5 Hz interaction frequency and 5 mm interaction displacement amplitude;the friction coefficients of the aggregate particle contact interface of basalt,limestone and granite,three kinds of common parent rock materials,under the condition of water presence,are reduced to different degrees,and the friction coefficient of the contact interface of the aggregate particles from the softer limestone has been reduced the most;the friction coefficient of the contact interface of aggregate particles from the softer limestone has been reduced the most.The friction coefficient of the aggregate particle contact interface is reduced to the largest extent;the wear of the aggregate particle contact interface mainly occurs in the early stage of particle friction contact,and the existence of water environment reduces the degree of the wear of the aggregate particle contact interface to a certain extent;the texture structure level of long-wave low-frequency band and short-wave high-frequency band on the surface of abrasive spots caused by abrasive debris at the contact interface of aggregate particles is lower than that of medium-wave middle-frequency band caused by the grain structure of aggregate particles,and the presence of water can reduce the texture str

关 键 词：路面工程 透水路面 开级配碎石 摩擦磨损 频谱分析 

分 类 号：U418.1[交通运输工程—道路与铁道工程]