无损检测技术在道路工程隐性病害中的研究进展

Research Development on Non-destructive Testing Technology for Hidden Diseases in Highway Engineering

脱空、空洞等隐性病害直接影响着道路桥梁的安全性与耐久性,而传统的隐性病害检测方法无法直观判别病害的发生与扩展,因此利用快速、高精度的无损检测技术对道路病害检测具有十分重要的意义。在阐释道路工程中脱空、空洞隐性病害的形成与扩展机理的基础上,综述了路面主要无损检测技术的分类及检测原理,并总结红外热成像、探地雷达及落锤式弯沉无损检测技术的研究进展;最后,就无损检测技术在道路桥梁工程中的应用趋势作出展望。

The hidden diseases of highway and bridges,such as the void between structure layers and cavity beneath the road,directly affect the safety and durability of these projects,while traditional diseases detecting methods has little efficiency on identifying the occurrence and propagation of diseases.Therefore,it is greatly significant in terms of detecting road diseases by fast and accurate non-destructive testing technology (NDT).Based on analysis of the mechanism of void initiation and propagation,both the classification of common non-destructive testing techniques and the detecting principle were summarized.In addition,the research developments on NDT,which included Infrared Thermal Imaging Detection,Ground Penetrating Radar,and Falling Weight Deflectometer,were discussed to form the application features.Finally,the outlook of the NDT application tendencies in highway and bridge engineering was proposed.