What is the arch culvert in road construction?

Arch culvert is a kind of culvert and passage, which is used for water, people and small locomotives to cross under the road and adopts vault. Generally speaking, it takes advantage of the good compressive performance of arch structure and is suitable for the case of high fill in the upper part of culvert. Divided into stone arch culvert and reinforced concrete arch culvert. Arch culvert is mainly composed of culvert body and hole. The culvert body of arch culvert is mainly composed of arch ring, arch protector, side wall, culvert abutment, foundation and expansion joint. The commonly used hole types of arch culvert are splayed wall or straight wall.