According to the functions and structural characteristics of the use, the duct can be divided into many types. Common types of culverts include circular culverts, rectangular culverts, arched culverts, etc. These types of culverts have their own characteristics and are suitable for different occasions and needs. For example, circular culverts have the advantages of strong structure and strong bearing capacity, which are suitable for occasions that need to withstand greater pressure; rectangular culverts have the advantages of small area and convenient construction, which are suitable for laying in narrow urban areas.