The culvert is the middle part of the culvert, excluding the drop wells and splayed walls at both ends, including the foundation and platform cover;
The culvert cushion is above the culvert foundation and the platform Below the cap, the culvert platform is divided into two sides, and the outer fill part can be called the back of the platform.
The foundation of the culvert is the part below the culvert cushion.
Culverts refer to drainage holes (water passages) built under the roadbed and below the road surface in order to allow the highway to pass through water channels smoothly without hindering traffic during highway engineering construction. This structure can allow water to pass through. Flows underneath the road. It is used to drain flood water across natural valleys and depressions, or as an overpass for people, livestock and vehicles across large and small roads, or as a water channel for farmland irrigation. A culvert mainly consists of a cave body, a foundation, an end, and a wall. Culverts are based on the principle of connectors and are commonly built with materials such as bricks, stones, concrete and reinforced concrete. Generally, the aperture is small, and the shapes include tube shape, box shape, arch shape, etc.
The function of culverts is to quickly remove surface water along the highway and ensure the safety of the roadbed. As one of the important components of highway projects, culverts account for a large proportion of highway projects and are an important component of highway projects, mainly reflected in the number of projects and project costs. According to relevant information: the number of culvert projects accounts for about 60% to 70% of the total number of bridges and culverts. In plain areas, there are about 1 to 3 per kilometer; in mountainous and hilly areas, the average is about 4 to 6 per kilometer. The cost of culvert projects accounts for about 40% of the total amount of bridges and culverts.