自从1960年末开始大量铺设混凝土轨枕以来,我国的养护维修人员在研究、设计部门的配合下,进行了艰苦地摸索,铺设和养护水平提高很快。经过这几年的实践,大家对混凝土轨枕线路的认识已经有了一个飞跃,从而进入了一个新的阶段.在这新的阶段里,我们遇到了新的问题。最近,在各铁路局早期铺设的混凝土轨枕线路上 Since the laying of concrete sleepers in large quantities since the late 1960s, maintenance and repair personnel in our country have made painstaking efforts with the cooperation of research and design departments, and have rapidly raised the level of laying and maintenance. After these years of practice, everyone has made a leap in understanding of the concrete sleeper line, and has entered a new phase in which we have encountered new problems. Recently, on concrete sleepers laid early on by the railway administrations