拱涵的混凝土拱圈在修建和使用中出现一些轻微的裂纹,从设计规范和理论计算等方面分析,这是一种不奇怪的现象。但多年来在某些地区修建的拱涵,出现的裂纹较多,有少数裂纹还相当严重,有宽达12毫米者,从而使人有“十拱九裂”之议论,曾引起人们的一些忧虑。但也有另一种观点,即所谓的拱涵开裂无害论。长期以来,很多单位和专家对拱涵的裂纹问题发表了不少论文和见解。本文仅从设计和使用两个侧面,对拱涵的裂纹问题提供一点看法。一、设计方面任何一个结构物的设计均需要满足强 Arch culvert concrete arch ring in the construction and use of some minor cracks, from the design specifications and theoretical calculations, etc., which is not surprising. However, the arch culverts built in some areas over the years have seen more cracks and a few more serious cracks, with widths up to 12 millimeters, so that people have a “ten arches and nine splinters” argument that has given rise to some people concern. But there is another point of view, the so-called arch culvert cracking harmless theory. For a long time, many units and experts published a lot of papers and opinions on the problem of cracking of arch culverts. In this paper, only from the design and use of two sides, the crack on the culvert to provide a little view. First, the design of any one of the structural design needs to meet the strong