基于无损检测技术的白加黑路面病害探测与评价  

Detection and Evaluation of“White and Black”Pavement Diseases Based on Non-destructive Testing Technology

作　　者：吴延凯 卢旭 魏育奇 陈搏 刘嘉俊 WU Yankai;LU Xu;WEI Yuqi;CHEN Bo;LIU Jiajun(Baoli Changda Engineering Co.,Ltd.,Guangzhou 510620,China;Xiaoning Institute of Roadway Engineering,Guangzhou 510640,China)

机构地区：[1]保利长大工程有限公司,广州510620 [2]广州肖宁道路工程技术研究事务所有限公司,广州510640

出　　处：《科技和产业》2022年第8期329-335,共7页Science Technology and Industry

摘　　要：为更加准确探测白加黑路面的结构层内部隐性病害,依托茂湛高速改扩建项目白加黑路面,采用三维探地雷达技术开展既有路面的病害检测,并结合落锤式弯沉仪进行白加黑路面的结构承载能力测试。结果表明,采用三维探地雷达设备可以清晰识别白加黑路面结构断板、裂缝、脱空、传力杆布设等内部状况信息,能反映出原有路面结构内部各层位病害的总体情况。在多年车辆荷载作用下,白加黑路面的反射裂缝病害比例较高,建议采取注浆、灌缝等养护措施,加强对旧水泥板与沥青层开展稳固与密水处理;水泥路面加铺沥青层后,路顶弯沉值整体变小,有无沥青层的弯沉差值主要与沥青加铺层厚度、模量、老化程度有关。为了更好模拟实际轮载对路面的荷载作用,推荐采用10 t荷载进行板间弯沉差测试,并以弯沉差为0.05 mm以上为处治阈值,进行针对性地补强处理。In order to more accurately detect the hidden diseases in the structural layer of the white and black pavement,relying on the white and black pavement of Maozhan Expressway reconstruction and expansion project,the three-dimensional ground penetrating radar technology was used to carry out the disease detection of the existing pavement,and the structural bearing capacity of the white and black pavement was tested combined with the falling weight deflectometer.The results show that the three-dimensional ground penetrating radar equipment can clearly identify the internal condition information of white and black pavement structure,such as broken plate,crack,void and force transmission rod layout,which can reflect the overall situation of the internal layer diseases of the original pavement structure.Under the action of vehicle load for many years,the proportion of reflective crack disease of white and black pavement is high.It is proposed to adopt grouting,crack pouring and other maintenance measures to strengthen the stability and watertight treatment of old cement board and asphalt layer.After overlaying the asphalt layer on the cement pavement,the deflection value of the top of the road decreases as a whole.The deflection difference with or without asphalt layer is mainly related to the thickness,modulus and aging degree of asphalt overlay.In order to better simulate the load effect of actual wheel load on pavement,it is recommended to use 10 t load to test the deflection difference between slabs,and take the deflection difference above 0.05 mm as the treatment threshold to carry out targeted reinforcement treatment.

关 键 词：白加黑路面 三维探地雷达 内部病害 落锤式弯沉仪 弯沉差 

分 类 号：U416.01[交通运输工程—道路与铁道工程]