面波技术在高铁临近既有铁路路基检测中的应用

The Application of Rayleigh Wave Technique to Detection of Roadbeds Close to High-speed Railway

高铁在迅速发展,为我国经济的快速发展起到了巨大助推作用,但其对临近既有铁路路基也造成巨大的影响。瑞雷波法在分层介质中具有频散特性,以及瑞雷波传播速度与介质物理力学性质具有密切相关,为铁路路基的病害探测提供了理论基础,本文利用瑞雷面波法对高铁临近既有铁路路基勘探,并作出评估,为其在高铁临近既有铁路路基病害的确定、整治及预防提供科学依据。文章在介绍铁路路基地球物理勘探方法的基础上,重点介绍瑞雷面波勘探技术在既有铁路路基勘察中的优势及方法原理,并通过实际应用证明其方法的有效性和优越性。

The rapid development of the high--speed rail promotes the economic development of our country, but it causes some big problems on the roadbed close to the high-speed rail. Rayleigh wave has dispersion properties in layered media, and the propagation velocity of Rayleigh wave is closely related to physical properties of media, so it provides a theoretical basis for detecting the roadbed defects. In the paper, we use rayleigh wave method to prospect the roadbed close to the high--speed rail and make an evaluation so as to provide a scientific evidence for locating, controlling and preventing the defects on the roadbeds. This paper introduces the advantages and methods of rayleigh wave exploration technique in the roadbed exploration and further proves the effectiveness through the practical application.