混凝土轨枕作为轨下基础,近年广泛使用,广州铁路局至一九七四年底已铺设近一千三百公里,二百二十五万根,而且还在逐年扩大。但近年来发现垫层损坏严重,耗工、费料,威胁行车安全,影响线路质量。为了摸清各种垫层的弹性和绝缘,延长垫层使用寿命, As a foundation under the rail, concrete sleepers have been widely used in recent years. By the end of 1974, the Guangzhou Railway Bureau has laid nearly 1,300 kilometers and 2.25 million and has also been expanding year by year. In recent years, however, it has been found that the cushion layer is seriously damaged, labor-consuming and cost-consuming, threatening the traffic safety and affecting the quality of the line. In order to find all kinds of cushion elasticity and insulation, extend the cushion life,