近年来水泥混凝土路面在我国发展较快,修建的里程愈来愈长,施工经验不断丰富并采用了新型施工机具。同时,有些问题也引起了人们重视,断板问题就是其中之一。由于采用切缝机切割缩缝,淘汰了传统的镶嵌木条的方法,使施工时的整板长度由5～8米增加到100米以上,然后在一定的时间内切割成缩缝。这样,可节省工时、提高施工速度、改善汽车行驶条件。但是,在切割缩缝之前又往往产生横贯全幅的断板现象,留下后患。断板问题虽然已经引起国内外不少人士的注意,但却没有解决这个问题。本 In recent years, the rapid development of cement concrete pavement in our country, the longer the mileage of the construction, the construction experience has been continuously enriched and adopted a new type of construction machinery. At the same time, some problems have also drawn people’s attention. The issue of breaking the board is one of them. Due to the use of cutting machine to cut the shrinkage, out of the traditional method of inlaid wood so that the construction of the entire board length from 5 to 8 meters to 100 meters or more, and then cut into shrinkage within a certain period of time. In this way, working hours can be saved, construction speed can be improved, and driving conditions of automobiles improved. However, it is often the case that there is a problem of cross-cutting across the entire length of the cut before the cut is made. Although the issue of broken plate has attracted the attention of many people both at home and abroad, it has not solved this problem. this