水泥混凝土路面的接缝,尤其是伸缝,是混凝土路面发生破损的薄弱环节,因而普遍认为减少接缝数量,对于提高道路的使用品质和延长寿命是有利的。为此,本省公路工程主管部门把混凝土路面的伸缝设置问题列为科研项目,从1972年开始至今进行了长期的现扬试验和理论研究工作,并在工程实践中逐步地把伸缝间距由常用的20米左右延长到1000米以上,改变了传流的做法。实践证明,延长伸缝间距在改善道路的使用品质、简化施工工艺和降低造价等方面均获得了良好的效果。本文摘要阐述该项目的试验研究成果,着重于通过理论分析,说明伸缝间距延长之后,混凝土路面板由于伸胀受阻产生的应力远低于材料的承压容许 The joints of cement concrete pavements, especially the stretch seams, are the weak points of concrete pavement damage. Therefore, it is generally considered that reducing the number of seams is advantageous for improving the service quality and prolonging the service life of roads. To this end, the provincial highway construction department of the concrete pavement stretch seam set issue as a research project, from 1972 to date carried out a long-term tests and theoretical research, and gradually in the practice of the stretch gap from The commonly used 20 meters or so extended to more than 1,000 meters, changing the practice of transmission. Practice has proved that extending the gap between the pitch in the road to improve the quality of use, to simplify the construction process and reduce costs have achieved good results. This paper summarizes the experimental research results of the project, focusing on the theoretical analysis shows that after the extension of the stretch gap, the concrete pavement slab due to expansion stress is far less than the allowable pressure of the material